Some standard content:
Engineering Construction Standard Full-text Information System
Industry Standard of the People's Republic of China
Design Code for Urban Heating Network
CJJ34—90
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Industry Standard of the People's Republic of China
Design Code for Urban Heating Network
34—90
Editor: Beijing Gas and Thermal Engineering Design Institute Approval Department: Ministry of Construction of the People's Republic of China Effective Date: October 1, 1990
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Notice on the Release of Industry Standard
"Design Code for Urban Heating Network" (90) Jianbiaozi No. 50
Construction Committees (Construction Departments) of all provinces and autonomous regions, Construction Committees of municipalities directly under the Central Government and cities with independent planning status, and relevant ministries and commissions of the State Council:
In accordance with the requirements of the former Ministry of Urban and Rural Construction and Environmental Protection's (83) Chengkezi No. 199 and (83) Chengkezi No. 224, the "Design Code for Urban Heating Network" edited by Beijing Gas and Heat Engineering Design Institute has been reviewed and approved as an industry standard with the number CJJ34-90, which will be implemented from October 1, 1990. If there are any questions or comments during the implementation process, please inform Beijing Gas and Heat Engineering Design Institute in writing. Ministry of Construction of the People's Republic of China
February 7, 1990
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Engineering Construction Standards Full-text Information System
Main Symbols
Chapter 1 General Provisions·
Chapter 2 Heat Consumption
Section 1 Heat Load
Annual Heat Consumption
Section 2
Chapter 3
Heating Medium··
Section 1
Section 2
Section 3
Section 4
Chapter 4
Chapter 5
Chapter 6
Selection of heating medium
Heating medium parameters
Water quality standards...
Water replenishment rate and condensate recovery rate·
Heating network type
Heating regulation
Hydraulic calculation
Section 1
Section 2
Section 3||t t||Section 4
Chapter 7
Design flow
Hydraulic calculation
Pressure condition
Water pump selection
Pipe network layout and laying
Section 1
Section 2
Section 3
Section 4
Section 5
Chapter 8
Chapter 9
Pipe network layout
Pipeline laying
Pipeline materials and Connection ·
Accessories and facilities
Thermal compensation
Calculation of mechanical strength of pipelines
Relay pumping station and thermal power station
Section 1
General provisions
Section 2 Relay pumping station
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Section 3
Civil Heating Station
Section 4
Industrial Heating Station
Chapter 10
Insulation and Anti-corrosion Coating
Section 1
Section 2
Section 3
Section 4
Chapter 11
Section 1
Section 2
Section 3
Chapter 12
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Appendix II
Appendix III
General provisions
Insulation calculation
Insulation structure
Anti-corrosion coating
Power supply and distribution of urban heating network
General provisions
Power supply and distribution
Thermal detection and control
General provisions
Contents of parameter detection and control
Heating network detection
Relay pump station detection and control
Heating station detection and control
Heating network dispatching automation·
Terminology explanation
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****51
Legal Conversion relationship between measurement units and non-statutory measurement units·····52
Explanation of terms used in this specification
Additional explanation
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Main symbols
A—Building area
c——Specific heat capacity of water
G, heating heat load thermal network design flow
Gu——Ventilation and air conditioning heat load thermal network design flow-domestic hot water heat load thermal network average flow Gsp
Gg·max
domestic hot water heat load thermal network maximum flow G,—closed thermal network trunk line design flow Quantity
One-way design flow of the main line of the open heating networkbzxz.net
G!—Design flow of the mixing device
n—Number of days in the heating period
Q.—Heating heat load
Average heating heat load
Ventilation and air conditioning heat load
Average ventilation and air conditioning heat load in the heating period
Average domestic hot water heat load in the heating period
Average domestic hot water heat load in the non-heating period
Maximum domestic hot water heat load
One-year heating heat consumption
One-year ventilation and air conditioning heat consumption
One-year domestic hot water heat consumption
q—Heating heat index
9. ——Hot water heat index for residential areas
t——Water supply temperature of heating network at outdoor calculated temperature for heating t2——Return water temperature of heating network at outdoor calculated temperature for heating t——Water supply temperature at the beginning of heating period of closed heating network Engineering Construction Standard Full Text Information System
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t——Return water temperature of domestic hot water heater at the beginning of the closed heating network deferred period
——Supply water temperature of open heating network at the beginning of the heating period-heating network supply water temperature at the corresponding outdoor calculated temperature of ventilation and air conditioning in winter
ta——Return water temperature of ventilation and air conditioning of heating network at the corresponding outdoor calculated temperature of ventilation and air conditioning in winter
t—Indoor calculated temperature of building
t,——Average outdoor temperature during heating period
-Outdoor calculated temperature for heating
-Outdoor calculated temperature corresponding to ventilation and air conditioning in winter Domestic hot water temperature
t ——Calculated cold water temperature
——Average cold water temperature during non-heating period
t——Hot water outlet temperature of first-level domestic hot water heater at the beginning of heating period
Z——Average daily operation hours of ventilation and air conditioning during heating period1——Design water supply temperature of user heating system
——Heating return water temperature of heating network at the beginning of heating period2
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Chapter 1 General Provisions
Article 1.0.1 This specification is specially formulated to save energy, protect the environment, promote production, facilitate people's lives, accelerate the development of urban centralized heating in my country, and improve the design level of centralized heating projects.
Article 1.0.2 This specification is applicable to the design of process systems such as newly built or rebuilt urban heating network pipelines, relay pump stations and user heating stations with thermal power plants or regional boiler rooms as heat sources. The design of urban heating networks with other types of heat sources can refer to this specification. Application scope of heating medium design parameters:
1. The pressure of hot water heating network is less than or equal to 2.5MPa, and the temperature is less than or equal to 200℃;
2. The pressure of steam heating network is less than or equal to 1.6MPa, and the temperature is less than or equal to 350℃.
Article 1.0.3 The design of urban heating network shall comply with urban planning, be technologically advanced, economically reasonable, safe and applicable, and pay attention to aesthetics. Article 1.0.Article 4 In addition to implementing this code, when designing urban heating network projects in earthquake, collapsible loess, expansive soil and other areas, the current "Code for Seismic Design of Outdoor Water Supply and Drainage and Gas Thermal Engineering" T32, "Code for Building in Collapsible Loess Areas" TJ25, "Technical Code for Building in Expansive Soil Areas" GBJ112 and relevant standards and specifications issued by the state and relevant professional departments shall also be followed. Engineering Construction Standard Full-text Information System
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Chapter 2 Heat Consumption
Section 1 Heat Load
Article 2.1.1 When designing heating network branches and user heating stations, the heating, ventilation, air conditioning and domestic hot water heat loads shall adopt the verified building design heat loads. Article 2.1.2 When there is no data on the design heat load of a building, or in the preliminary design stage of the heat network, the heating, ventilation, air conditioning and domestic hot water heat load of civil buildings can be calculated according to the following example:
1. Heating heat load
Q,=q·A10-3
Where Q——heating heat load, kW,
(2.1.2-1)
9——heating heat index, W/m, which can be obtained according to Table 2.1.2-1, A——the building area of the heating building, m2. Recommended value of heating heat index
Residential area
Standard 58~6460~67
60~8065~8060~7065~80
(w/m2)
Note: The heat index already includes about 5% of the heat loss of the pipe network. 2. Ventilation and air conditioning winter fresh air heating heat load Qa=KiQ:
Where Qu——ventilation and air conditioning fresh air heating heat load, kW; Table 2.1.2-1
Cinema
Great Hall
Gymnasium
Exhibition Hall
115~165
(2.1.2-2)
Q——heating heat load of ventilation and air conditioning buildings, kW; K1——coefficient for calculating ventilation and air conditioning fresh air heating heat load of buildings, which can be taken as 0.3~0.5.
3. Average heat load of domestic hot water during heating period Qg = 0. 001163 m(t, - t)
Where Q. —Average heat load of domestic hot water during the heating period, kW; (2.1.2-3)
m——Number of hot water users (number of people for residential buildings, number of people per day, number of beds, etc. for public buildings);
Daily hot water consumption per hot water user, L/d, selected according to the "Code for Design of Building Water Supply and Drainage" GBJ15;
Domestic hot water temperature, ℃, taken according to the temperature specified in the hot water consumption standard;
t——Cold water calculation temperature, take the lowest monthly average water temperature, ℃, if there is no data, take according to the "Code for Design of Building Water Supply and Drainage" GBJ15; T——Daily water supply hours, generally 24h for residential buildings, hotels, hospitals, etc. The average heat load of domestic hot water in residential areas can be calculated according to the following formula: Qpy=q.A10-3
(2.1.2-4)
Q·j——Average heat load of domestic hot water in residential areas during the heating period, kW; where
9. ——Hot water heat index for residential areas. When there is no actual statistical data, it can be obtained according to Table 2.1.2-2;
A-total building area of residential areas, m. Hot water heat index for residential areas during heating period
Water-using equipment
When there is no hot water equipment in residential areas and only hot water is supplied to public buildings, when all residential areas have bathtubs and hot water is supplied
Table 2.1.2-2
(W/m22)
Note: ①When the cold water temperature is higher, a smaller value is used, and when the cold water temperature is lower, a larger value is used; ②The heat index already includes about 10% of the heat loss of the pipe network. 4. Maximum heat load of domestic hot water
Qs max = k2Q sp
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(2.1.2-5)
Engineering Construction Standard Full Text Information System
Where Q. max——maximum heat load of domestic hot water, kW; Q——average heat load of domestic hot water, kW; 2—one-hour variation coefficient, which shall be taken according to the provisions of "Design Code for Building Water Supply and Drainage" GBJ15 according to the number of water units. It can be taken as 2~3. Article 2.1.3 The maximum heat load of the production process and the condensate recovery rate shall adopt the design data of the process system.
When calculating the maximum production process heat load of the heating network, the sum of the maximum heat loads verified by each industrial enterprise shall be multiplied by the value of the simultaneous coefficient. The simultaneous coefficient can be taken as 0.7~0.9. Article 2.1.4 When there is no design data for heating, ventilation, air conditioning, domestic hot water and heat load of production process in industrial buildings, the actual heat consumption data of production buildings and production processes should be used for existing enterprises, and possible changes in the future should be taken into account. For industrial enterprises under planning and construction, the design data or actual heat consumption quota of enterprises of the same type and region should be used for calculation.
Article 2.1.5 When calculating the heat load of the heating network, the heat load of domestic hot water shall be taken in accordance with the following provisions:
1. For the main line, the average heat load of domestic hot water during the heating period shall be used; 2. For the branch line, when all users have water storage tanks, the average heat load of domestic hot water during the heating period shall be used; when users do not have water storage tanks, the maximum heat load of domestic hot water during the heating period shall be used. Section 2 Annual Heat Consumption
Article 2.2.1
The average heat load for heating and the average heat load for ventilation and air conditioning during the heating period shall be calculated according to the following method:
1. Average heat load for heating
t, -t,
Q.=Qt-o
Q,——average heat load for heating, kW;
Q. Design heat load for heating, kW;
t,——design indoor temperature, ℃, which can be 18℃; t,——average outdoor temperature during the heating period, ℃; t—calculated outdoor temperature for heating, ℃.
Engineering Construction Standard Full Text Information System
(2.2.1-1)
Engineering Construction Standard Full Text Information System
2. Average heat load of ventilation and air conditioning during heating period In the formula,
Qug=Qu t-te a
t,—t,
Qa is the average heat load of ventilation or air conditioning during heating period, kW; Qa is the design heat load of ventilation or air conditioning during heating period, kW; t is the indoor design temperature of ventilated or air-conditioned buildings, ℃; t, is the average outdoor temperature during heating period, ℃; t, is the calculated outdoor temperature of ventilation or air conditioning in winter, ℃. twtk
(2.2.1-2)
Article 2.2.2 The average heat load of domestic hot water in the non-heating period shall be calculated according to the following formula: Where Q*—
Qpr=Qn,-t
The average heat load of domestic hot water in the non-heating period, kW; The average heat load of domestic hot water in the heating period, kW; t,——the design temperature of domestic hot water, ℃; tu—the cold water temperature in summer (the average water temperature in the non-heating period), ℃; t
—the cold water temperature in winter (the average water temperature in the heating period), ℃. (2.2.2)
Article 2.2.3 The annual heat consumption of civil buildings shall be calculated according to the following method. 1. Annual heat consumption for heating
Q:=0.0864Q,n
Q:--Annual heat consumption for heating, GJ;
Q--average heat load for heating, kW;
n--number of days in the heating period.
2. Annual heat consumption for ventilation or air conditioning
Qu=0.0036ZQapn
Qa--Annual heat consumption for ventilation or air conditioning, GJ; Q--average heat load for ventilation or air conditioning, kW;(2.2.3-1)
(2.2.3-2)
Z--average daily operating hours of ventilation and air conditioning devices during the heating period, h,
number of days in the heating period.
3. Annual heat consumption of domestic hot water
Q:=0.0864[Qqn+Qp·z（350—n)］Q: Annual heat consumption of domestic hot water, GJ; where
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(2.2.3-3)2. When there is no data on building design heat load, or in the preliminary design stage of the heat network, the heating, ventilation, air conditioning and domestic hot water heat load of civil buildings can be calculated as follows:
1. Heating heat load
Q,=q·A10-3
Where Q——heating heat load, kW,
(2.1.2-1)
9——heating heat index, W/m, can be obtained according to Table 2.1.2-1, A——building area of heating buildings, m2. Recommended value of heating heat index
Residential area
Standard 58~6460~67
60~8065~8060~7065~80
(w/m2)
Note: The heat index already includes about 5% of the heat loss of the pipe network. 2. Ventilation and air conditioning winter fresh air heating heat load Qa=KiQ:
Where Qu——ventilation and air conditioning fresh air heating heat load, kW; Table 2.1.2-1
Cinema
Great Hall
Gymnasium
Exhibition Hall
115~165
(2.1.2-2)
Q——heating heat load of ventilation and air conditioning buildings, kW; K1——coefficient for calculating ventilation and air conditioning fresh air heating heat load of buildings, which can be taken as 0.3~0.5.
3. Average heat load of domestic hot water during heating period Qg = 0. 001163 m(t, - t)
Where Q. —Average heat load of domestic hot water during the heating period, kW; (2.1.2-3)
m——Number of hot water users (number of people for residential buildings, number of people per day, number of beds, etc. for public buildings);
Daily hot water consumption per hot water user, L/d, selected according to the "Code for Design of Building Water Supply and Drainage" GBJ15;
Domestic hot water temperature, ℃, taken according to the temperature specified in the hot water consumption standard;
t——Cold water calculation temperature, take the lowest monthly average water temperature, ℃, if there is no data, take according to the "Code for Design of Building Water Supply and Drainage" GBJ15; T——Daily water supply hours, generally 24h for residential buildings, hotels, hospitals, etc. The average heat load of domestic hot water in residential areas can be calculated according to the following formula: Qpy=q.A10-3
(2.1.2-4)
Q·j——Average heat load of domestic hot water in residential areas during the heating period, kW; where
9. ——Hot water heat index for residential areas. When there is no actual statistical data, it can be obtained according to Table 2.1.2-2;
A-total building area of residential areas, m. Hot water heat index for residential areas during heating period
Water-using equipment
When there is no hot water equipment in residential areas and only hot water is supplied to public buildings, when all residential areas have bathtubs and hot water is supplied
Table 2.1.2-2
(W/m22)
Note: ①When the cold water temperature is higher, a smaller value is used, and when the cold water temperature is lower, a larger value is used; ②The heat index already includes about 10% of the heat loss of the pipe network. 4. Maximum heat load of domestic hot water
Qs max = k2Q sp
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(2.1.2-5)
Engineering Construction Standard Full Text Information System
Where Q. max——maximum heat load of domestic hot water, kW; Q——average heat load of domestic hot water, kW; 2—one-hour variation coefficient, which shall be taken according to the provisions of "Design Code for Building Water Supply and Drainage" GBJ15 according to the number of water units. It can be taken as 2~3. Article 2.1.3 The maximum heat load of the production process and the condensate recovery rate shall adopt the design data of the process system.
When calculating the maximum production process heat load of the heating network, the sum of the maximum heat loads verified by each industrial enterprise shall be multiplied by the value of the simultaneous coefficient. The simultaneous coefficient can be taken as 0.7~0.9. Article 2.1.4 When there is no design data for heating, ventilation, air conditioning, domestic hot water and heat load of production process in industrial buildings, the actual heat consumption data of production buildings and production processes should be used for existing enterprises, and possible changes in the future should be taken into account. For industrial enterprises under planning and construction, the design data or actual heat consumption quota of enterprises of the same type and region should be used for calculation.
Article 2.1.5 When calculating the heat load of the heating network, the heat load of domestic hot water shall be taken in accordance with the following provisions:
1. For the main line, the average heat load of domestic hot water during the heating period shall be used; 2. For the branch line, when all users have water storage tanks, the average heat load of domestic hot water during the heating period shall be used; when users do not have water storage tanks, the maximum heat load of domestic hot water during the heating period shall be used. Section 2 Annual Heat Consumption
Article 2.2.1
The average heat load for heating and the average heat load for ventilation and air conditioning during the heating period shall be calculated according to the following method:
1. Average heat load for heating
t, -t,
Q.=Qt-o
Q,——average heat load for heating, kW;
Q. Design heat load for heating, kW;
t,——design indoor temperature, ℃, which can be 18℃; t,——average outdoor temperature during the heating period, ℃; t—calculated outdoor temperature for heating, ℃.
Engineering Construction Standard Full Text Information System
(2.2.1-1)
Engineering Construction Standard Full Text Information System
2. Average heat load of ventilation and air conditioning during heating period In the formula,
Qug=Qu t-te a
t,—t,
Qa is the average heat load of ventilation or air conditioning during heating period, kW; Qa is the design heat load of ventilation or air conditioning during heating period, kW; t is the indoor design temperature of ventilated or air-conditioned buildings, ℃; t, is the average outdoor temperature during heating period, ℃; t, is the calculated outdoor temperature of ventilation or air conditioning in winter, ℃. twtk
(2.2.1-2)
Article 2.2.2 The average heat load of domestic hot water in the non-heating period shall be calculated according to the following formula: Where Q*—
Qpr=Qn,-t
The average heat load of domestic hot water in the non-heating period, kW; The average heat load of domestic hot water in the heating period, kW; t,——the design temperature of domestic hot water, ℃; tu—the cold water temperature in summer (the average water temperature in the non-heating period), ℃; t
—the cold water temperature in winter (the average water temperature in the heating period), ℃. (2.2.2)
Article 2.2.3 The annual heat consumption of civil buildings shall be calculated according to the following method. 1. Annual heat consumption for heating
Q:=0.0864Q,n
Q:--Annual heat consumption for heating, GJ;
Q--average heat load for heating, kW;
n--number of days in the heating period.
2. Annual heat consumption for ventilation or air conditioning
Qu=0.0036ZQapn
Qa--Annual heat consumption for ventilation or air conditioning, GJ; Q--average heat load for ventilation or air conditioning, kW;(2.2.3-1)
(2.2.3-2)
Z--average daily operating hours of ventilation and air conditioning devices during the heating period, h,
number of days in the heating period.
3. Annual heat consumption of domestic hot water
Q:=0.0864[Qqn+Qp·z（350—n)］Q: Annual heat consumption of domestic hot water, GJ; where
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TKAONT KAca-
(2.2.3-3)2. When there is no data on building design heat load, or in the preliminary design stage of the heat network, the heating, ventilation, air conditioning and domestic hot water heat load of civil buildings can be calculated as follows:
1. Heating heat load
Q,=q·A10-3
Where Q——heating heat load, kW,
(2.1.2-1)
9——heating heat index, W/m, can be obtained according to Table 2.1.2-1, A——building area of heating buildings, m2. Recommended value of heating heat index
Residential area
Standard 58~6460~67
60~8065~8060~7065~80
(w/m2)
Note: The heat index already includes about 5% of the heat loss of the pipe network. 2. Ventilation and air conditioning winter fresh air heating heat load Qa=KiQ:
Where Qu——ventilation and air conditioning fresh air heating heat load, kW; Table 2.1.2-1
Cinema
Great Hall
Gymnasium
Exhibition Hall
115~165
(2.1.2-2)
Q——heating heat load of ventilation and air conditioning buildings, kW; K1——coefficient for calculating ventilation and air conditioning fresh air heating heat load of buildings, which can be taken as 0.3~0.5.
3. Average heat load of domestic hot water during heating period Qg = 0. 001163 m(t, - t)
Where Q. —Average heat load of domestic hot water during the heating period, kW; (2.1.2-3)
m——Number of hot water users (number of people for residential buildings, number of people per day, number of beds, etc. for public buildings);
Daily hot water consumption per hot water user, L/d, selected according to the "Code for Design of Building Water Supply and Drainage" GBJ15;
Domestic hot water temperature, ℃, taken according to the temperature specified in the hot water consumption standard;
t——Cold water calculation temperature, take the lowest monthly average water temperature, ℃, if there is no data, take according to the "Code for Design of Building Water Supply and Drainage" GBJ15; T——Daily water supply hours, generally 24h for residential buildings, hotels, hospitals, etc. The average heat load of domestic hot water in residential areas can be calculated according to the following formula: Qpy=q.A10-3
(2.1.2-4)
Q·j——Average heat load of domestic hot water in residential areas during the heating period, kW; where
9. ——Hot water heat index for residential areas. When there is no actual statistical data, it can be obtained according to Table 2.1.2-2;
A-total building area of residential areas, m. Hot water heat index for residential areas during heating period
Water-using equipment
When there is no hot water equipment in residential areas and only hot water is supplied to public buildings, when all residential areas have bathtubs and hot water is supplied
Table 2.1.2-2
(W/m22)
Note: ①When the cold water temperature is higher, a smaller value is used, and when the cold water temperature is lower, a larger value is used; ②The heat index already includes about 10% of the heat loss of the pipe network. 4. Maximum heat load of domestic hot water
Qs max = k2Q sp
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KAONTKAca-
(2.1.2-5)
Engineering Construction Standard Full Text Information System
Where Q. max——maximum heat load of domestic hot water, kW; Q——average heat load of domestic hot water, kW; 2—one-hour variation coefficient, which shall be taken according to the provisions of "Design Code for Building Water Supply and Drainage" GBJ15 according to the number of water units. It can be taken as 2~3. Article 2.1.3 The maximum heat load of the production process and the condensate recovery rate shall adopt the design data of the process system.
When calculating the maximum production process heat load of the heating network, the sum of the maximum heat loads verified by each industrial enterprise shall be multiplied by the value of the simultaneous coefficient. The simultaneous coefficient can be taken as 0.7~0.9. Article 2.1.4 When there is no design data for heating, ventilation, air conditioning, domestic hot water and heat load of production process in industrial buildings, the actual heat consumption data of production buildings and production processes should be used for existing enterprises, and possible changes in the future should be taken into account. For industrial enterprises under planning and construction, the design data or actual heat consumption quota of enterprises of the same type and region should be used for calculation.
Article 2.1.5 When calculating the heat load of the heating network, the heat load of domestic hot water shall be taken in accordance with the following provisions:
1. For the main line, the average heat load of domestic hot water during the heating period shall be used; 2. For the branch line, when all users have water storage tanks, the average heat load of domestic hot water during the heating period shall be used; when users do not have water storage tanks, the maximum heat load of domestic hot water during the heating period shall be used. Section 2 Annual Heat Consumption
Article 2.2.1
The average heat load for heating and the average heat load for ventilation and air conditioning during the heating period shall be calculated according to the following method:
1. Average heat load for heating
t, -t,
Q.=Qt-o
Q,——average heat load for heating, kW;
Q. Design heat load for heating, kW;
t,——design indoor temperature, ℃, which can be 18℃; t,——average outdoor temperature during the heating period, ℃; t—calculated outdoor temperature for heating, ℃.
Engineering Construction Standard Full Text Information System
(2.2.1-1)
Engineering Construction Standard Full Text Information System
2. Average heat load of ventilation and air conditioning during heating period In the formula,
Qug=Qu t-te a
t,—t,
Qa is the average heat load of ventilation or air conditioning during heating period, kW; Qa is the design heat load of ventilation or air conditioning during heating period, kW; t is the indoor design temperature of ventilated or air-conditioned buildings, ℃; t, is the average outdoor temperature during heating period, ℃; t, is the calculated outdoor temperature of ventilation or air conditioning in winter, ℃. twtk
(2.2.1-2)
Article 2.2.2 The average heat load of domestic hot water in the non-heating period shall be calculated according to the following formula: Where Q*—
Qpr=Qn,-t
The average heat load of domestic hot water in the non-heating period, kW; The average heat load of domestic hot water in the heating period, kW; t,——the design temperature of domestic hot water, ℃; tu—the cold water temperature in summer (the average water temperature in the non-heating period), ℃; t
—the cold water temperature in winter (the average water temperature in the heating period), ℃. (2.2.2)
Article 2.2.3 The annual heat consumption of civil buildings shall be calculated according to the following method. 1. Annual heat consumption for heating
Q:=0.0864Q,n
Q:--Annual heat consumption for heating, GJ;
Q--average heat load for heating, kW;
n--number of days in the heating period.
2. Annual heat consumption for ventilation or air conditioning
Qu=0.0036ZQapn
Qa--Annual heat consumption for ventilation or air conditioning, GJ; Q--average heat load for ventilation or air conditioning, kW;(2.2.3-1)
(2.2.3-2)
Z--average daily operating hours of ventilation and air conditioning devices during the heating period, h,
number of days in the heating period.
3. Annual heat consumption of domestic hot water
Q:=0.0864[Qqn+Qp·z（350—n)］Q: Annual heat consumption of domestic hot water, GJ; where
Engineering Construction Standard Full-text Information System
TKAONT KAca-
(2.2.3-3)5.
III. Average heat load of domestic hot water during the heating period Qg = 0. 001163 m(t, - t)
Wherein, Q. — Average heat load of domestic hot water during the heating period, kW; (2.1.2-3)
m — Number of hot water units (number of people for residential buildings, number of people per day, number of beds, etc. for public buildings);
Daily hot water consumption per hot water unit, L/d, selected in accordance with the "Code for Design of Building Water Supply and Drainage" GBJ15;
Domestic hot water temperature, ℃, taken according to the temperature specified in the hot water consumption standard;
t — Calculation temperature of cold water, take the lowest monthly average water temperature, ℃, if no data is available, take according to the "Code for Design of Building Water Supply and Drainage" GBJ15; T — Number of water supply hours per day, generally 24h for residential buildings, hotels, hospitals, etc. The following formula can be used to calculate the average heat load of domestic hot water in residential areas: Qpy=q.A10-3
(2.1.2-4)
Q·j——Average heat load of domestic hot water in residential areas during heating period, kW; where
9. ——Hot index of domestic hot water in residential areas. When there is no actual statistical data, it can be obtained according to Table 2.1.2-2;
A——Total building area of residential areas, m. Hot index of domestic hot water in residential areas during heating period
Water-using equipment
When there is no domestic hot water equipment in residential areas and only hot water is supplied to public buildings, when all residential areas have bathtubs and are supplied with domestic hot water
Table 2.1.2-2
(W/m22)
Note: ①When the cold water temperature is higher, a smaller value is used, and when the cold water temperature is lower, a larger value is used; ②The heat index includes about 10% of the heat loss of the pipe network. 4. Maximum heat load of domestic hot water
Qs max = k2Q sp
Engineering Construction Standard Full Text Information System
KAONTKAca-
(2.1.2-5)
Engineering Construction Standard Full Text Information System
Where Q. max——maximum heat load of domestic hot water, kW; Q——average heat load of domestic hot water, kW; 2—one-hour variation coefficient, which shall be taken according to the provisions of "Design Code for Building Water Supply and Drainage" GBJ15 according to the number of water units. It can be taken as 2~3. Article 2.1.3 The maximum heat load of the production process and the condensate recovery rate shall adopt the design data of the process system.
When calculating the maximum production process heat load of the heating network, the sum of the maximum heat loads verified by each industrial enterprise shall be multiplied by the value of the simultaneous coefficient. The simultaneous coefficient can be taken as 0.7~0.9. Article 2.1.4 When there is no design data for heating, ventilation, air conditioning, domestic hot water and heat load of production process in industrial buildings, the actual heat consumption data of production buildings and production processes should be used for existing enterprises, and possible changes in the future should be taken into account. For industrial enterprises under planning and construction, the design data or actual heat consumption quota of enterprises of the same type and region should be used for calculation.
Article 2.1.5 When calculating the heat load of the heating network, the heat load of domestic hot water shall be taken in accordance with the following provisions:
1. For the main line, the average heat load of domestic hot water during the heating period shall be used; 2. For the branch line, when all users have water storage tanks, the average heat load of domestic hot water during the heating period shall be used; when users do not have water storage tanks, the maximum heat load of domestic hot water during the heating period shall be used. Section 2 Annual Heat Consumption
Article 2.2.1
The average heat load for heating and the average heat load for ventilation and air conditioning during the heating period shall be calculated according to the following method:
1. Average heat load for heating
t, -t,
Q.=Qt-o
Q,——average heat load for heating, kW;
Q. Design heat load for heating, kW;
t,——design indoor temperature, ℃, which can be 18℃; t,——average outdoor temperature during the heating period, ℃; t—calculated outdoor temperature for heating, ℃.
Engineering Construction Standard Full Text Information System
(2.2.1-1)
Engineering Construction Standard Full Text Information System
2. Average heat load of ventilation and air conditioning during heating period In the formula,
Qug=Qu t-te a
t,—t,
Qa is the average heat load of ventilation or air conditioning during heating period, kW; Qa is the design heat load of ventilation or air conditioning during heating period, kW; t is the indoor design temperature of ventilated or air-conditioned buildings, ℃; t, is the average outdoor temperature during heating period, ℃; t, is the calculated outdoor temperature of ventilation or air conditioning in winter, ℃. twtk
(2.2.1-2)
Article 2.2.2 The average heat load of domestic hot water in the non-heating period shall be calculated according to the following formula: Where Q*—
Qpr=Qn,-t
The average heat load of domestic hot water in the non-heating period, kW; The average heat load of domestic hot water in the heating period, kW; t,——the design temperature of domestic hot water, ℃; tu—the cold water temperature in summer (the average water temperature in the non-heating period), ℃; t
—the cold water temperature in winter (the average water temperature in the heating period), ℃. (2.2.2)
Article 2.2.3 The annual heat consumption of civil buildings shall be calculated according to the following method. 1. Annual heat consumption for heating
Q:=0.0864Q,n
Q:--Annual heat consumption for heating, GJ;
Q--average heat load for heating, kW;
n--number of days in the heating period.
2. Annual heat consumption for ventilation or air conditioning
Qu=0.0036ZQapn
Qa--Annual heat consumption for ventilation or air conditioning, GJ; Q--average heat load for ventilation or air conditioning, kW;(2.2.3-1)
(2.2.3-2)
Z--average daily operating hours of ventilation and air conditioning devices during the heating period, h,
number of days in the heating period.
3. Annual heat consumption of domestic hot water
Q:=0.0864[Qqn+Qp·z（350—n)］Q: Annual heat consumption of domestic hot water, GJ; where
Engineering Construction Standard Full-text Information System
TKAONT KAca-
(2.2.3-3)5.
III. Average heat load of domestic hot water during the heating period Qg = 0. 001163 m(t, - t)
Wherein, Q. — Average heat load of domestic hot water during the heating period, kW; (2.1.2-3)
m — Number of hot water units (number of people for residential buildings, number of people per day, number of beds, etc. for public buildings);
Daily hot water consumption per hot water unit, L/d, selected in accordance with the "Code for Design of Building Water Supply and Drainage" GBJ15;
Domestic hot water temperature, ℃, taken according to the temperature specified in the hot water consumption standard;
t — Calculation temperature of cold water, take the lowest monthly average water temperature, ℃, if no data is available, take according to the "Code for Design of Building Water Supply and Drainage" GBJ15; T — Number of water supply hours per day, generally 24h for residential buildings, hotels, hospitals, etc. The following formula can be used to calculate the average heat load of domestic hot water in residential areas: Qpy=q.A10-3
(2.1.2-4)
Q·j——Average heat load of domestic hot water in residential areas during heating period, kW; where
9. ——Hot index of domestic hot water in residential areas. When there is no actual statistical data, it can be obtained according to Table 2.1.2-2;
A——Total building area of residential areas, m. Hot index of domestic hot water in residential areas during heating period
Water-using equipment
When there is no domestic hot water equipment in residential areas and only hot water is supplied to public buildings, when all residential areas have bathtubs and are supplied with domestic hot water
Table 2.1.2-2
(W/m22)
Note: ①When the cold water temperature is higher, a smaller value is used, and when the cold water temperature is lower, a larger value is used; ②The heat index includes about 10% of the heat loss of the pipe network. 4. Maximum heat load of domestic hot water
Qs max = k2Q sp
Engineering Construction Standard Full Text Information System
KAONTKAca-
(2.1.2-5)
Engineering Construction Standard Full Text Information System
Where Q. max——maximum heat load of domestic hot water, kW; Q——average heat load of domestic hot water, kW; 2—one-hour variation coefficient, which shall be taken according to the provisions of "Design Code for Building Water Supply and Drainage" GBJ15 according to the number of water units. It can be taken as 2~3. Article 2.1.3 The maximum heat load of the production process and the condensate recovery rate shall adopt the design data of the process system.
When calculating the maximum production process heat load of the heating network, the sum of the maximum heat loads verified by each industrial enterprise shall be multiplied by the value of the simultaneous coefficient. The simultaneous coefficient can be taken as 0.7~0.9. Article 2.1.4 When there is no design data for heating, ventilation, air conditioning, domestic hot water and heat load of production process in industrial buildings, the actual heat consumption data of production buildings and production processes should be used for existing enterprises, and possible changes in the future should be taken into account. For industrial enterprises under planning and construction, the design data or actual heat consumption quota of enterprises of the same type and region should be used for calculation.
Article 2.1.5 When calculating the heat load of the heating network, the heat load of domestic hot water shall be taken in accordance with the following provisions:
1. For the main line, the average heat load of domestic hot water during the heating period shall be used; 2. For the branch line, when all users have water storage tanks, the average heat load of domestic hot water during the heating period shall be used; when users do not have water storage tanks, the maximum heat load of domestic hot water during the heating period shall be used. Section 2 Annual Heat Consumption
Article 2.2.1
The average heat load for heating and the average heat load for ventilation and air conditioning during the heating period shall be calculated according to the following method:
1. Average heat load for heating
t, -t,
Q.=Qt-o
Q,——average heat load for heating, kW;
Q. Design heat load for heating, kW;
t,——design indoor temperature, ℃, which can be 18℃; t,——average outdoor temperature during the heating period, ℃; t—calculated outdoor temperature for heating, ℃.
Engineering Construction Standard Full Text Information System
(2.2.1-1)
Engineering Construction Standard Full Text Information System
2. Average heat load of ventilation and air conditioning during heating period In the formula,
Qug=Qu t-te a
t,—t,
Qa is the average heat load of ventilation or air conditioning during heating period, kW; Qa is the design heat load of ventilation or air conditioning during heating period, kW; t is the indoor design temperature of ventilated or air-conditioned buildings, ℃; t, is the average outdoor temperature during heating period, ℃; t, is the calculated outdoor temperature of ventilation or air conditioning in winter, ℃. twtk
(2.2.1-2)
Article 2.2.2 The average heat load of domestic hot water in the non-heating period shall be calculated according to the following formula: Where Q*—
Qpr=Qn,-t
The average heat load of domestic hot water in the non-heating period, kW; The average heat load of domestic hot water in the heating period, kW; t,——the design temperature of domestic hot water, ℃; tu—the cold water temperature in summer (the average water temperature in the non-heating period), ℃; t
—the cold water temperature in winter (the average water temperature in the heating period), ℃. (2.2.2)
Article 2.2.3 The annual heat consumption of civil buildings shall be calculated according to the following method. 1. Annual heat consumption for heating
Q:=0.0864Q,n
Q:--Annual heat consumption for heating, GJ;
Q--average heat load for heating, kW;
n--number of days in the heating period.
2. Annual heat consumption for ventilation or air conditioning
Qu=0.0036ZQapn
Qa--Annual heat consumption for ventilation or air conditioning, GJ; Q--average heat load for ventilation or air conditioning, kW;(2.2.3-1)
(2.2.3-2)
Z--average daily operating hours of ventilation and air conditioning devices during the heating period, h,
number of days in the heating period.
3. Annual heat consumption of domestic hot water
Q:=0.0864[Qqn+Qp·z（350—n)］Q: Annual heat consumption of domestic hot water, GJ; where
Engineering Construction Standard Full-text Information System
TKAONT KAca-
(2.2.3-3)Article 4 When there is no design data for heating, ventilation, air conditioning, domestic hot water and heat load of production process in industrial buildings, the actual heat consumption data of production buildings and production processes should be used for existing enterprises, and possible changes in the future should be taken into account. For industrial enterprises under planning and construction, the design data or actual heat consumption quota of enterprises of the same type and region should be used for calculation.
Article 2.1.5 When calculating the heat load of the heating network, the heat load of domestic hot water shall be taken in accordance with the following provisions:
1. For the main line, the average heat load of domestic hot water during the heating period shall be used; 2. For the branch line, when all users have water storage tanks, the average heat load of domestic hot water during the heating period shall be used; when users do not have water storage tanks, the maximum heat load of domestic hot water during the heating period shall be used. Section 2 Annual Heat Consumption
Article 2.2.1
The average heat load for heating and the average heat load for ventilation and air conditioning during the heating period shall be calculated according to the following method:
1. Average heat load for heating
t, -t,
Q.=Qt-o
Q,——average heat load for heating, kW;
Q. Design heat load for heating, kW;
t,——design indoor temperature, ℃, which can be 18℃; t,——average outdoor temperature during the heating period, ℃; t—calculated outdoor temperature for heating, ℃.
Engineering Construction Standard Full Text Information System
(2.2.1-1)
Engineering Construction Standard Full Text Information System
2. Average heat load of ventilation and air conditioning during heating period In the formula,
Qug=Qu t-te a
t,—t,
Qa is the average heat load of ventilation or air conditioning during heating period, kW; Qa is the design heat load of ventilation or air conditioning during heating period, kW; t is the indoor design temperature of ventilated or air-conditioned buildings, ℃; t, is the average outdoor temperature during heating period, ℃; t, is the calculated outdoor temperature of ventilation or air conditioning in winter, ℃. twtk
(2.2.1-2)
Article 2.2.2 The average heat load of domestic hot water in the non-heating period shall be calculated according to the following formula: Where Q*—
Qpr=Qn,-t
The average heat load of domestic hot water in the non-heating period, kW; The average heat load of domestic hot water in the heating period, kW; t,——the design temperature of domestic hot water, ℃; tu—the cold water temperature in summer (the average water temperature in the non-heating period), ℃; t
—the cold water temperature in winter (the average water temperature in the heating period), ℃. (2.2.2)
Article 2.2.3 The annual heat consumption of civil buildings shall be calculated according to the following method. 1. Annual heat consumption for heating
Q:=0.0864Q,n
Q:--Annual heat consumption for heating, GJ;
Q--average heat load for heating, kW;
n--number of days in the heating period.
2. Annual heat consumption for ventilation or air conditioning
Qu=0.0036ZQapn
Qa--Annual heat consumption for ventilation or air conditioning, GJ; Q--average heat load for ventilation or air conditioning, kW;(2.2.3-1)
(2.2.3-2)
Z--average daily operating hours of ventilation and air conditioning devices during the heating period, h,
number of days in the heating period.
3. Annual heat consumption of domestic hot water
Q:=0.0864[Qqn+Qp·z（350—n)］Q: Annual heat consumption of domestic hot water, GJ; where
Engineering Construction Standard Full-text Information System
TKAONT KAca-
(2.2.3-3)Article 4 When there is no design data for heating, ventilation, air conditioning, domestic hot water and heat load of production process in industrial buildings, the actual heat consumption data of production buildings and production processes should be used for existing enterprises, and possible changes in the future should be taken into account. For industrial enterprises under planning and construction, the design data or actual heat consumption quota of enterprises of the same type and region should be used for calculation.
Article 2.1.5 When calculating the heat load of the heating network, the heat load of domestic hot water shall be taken in accordance with the following provisions:
1. For the main line, the average heat load of domestic hot water during the heating period shall be used; 2. For the branch line, when all users have water storage tanks, the average heat load of domestic hot water during the heating period shall be used; when users do not have water storage tanks, the maximum heat load of domestic hot water during the heating period shall be used. Section 2 Annual Heat Consumption
Article 2.2.1
The average heat load for heating and the average heat load for ventilation and air conditioning during the heating period shall be calculated according to the following method:
1. Average heat load for heating
t, -t,
Q.=Qt-o
Q,——average heat load for heating, kW;
Q. Design heat load for heating, kW;
t,——design indoor temperature, ℃, which can be 18℃; t,——average outdoor temperature during the heating period, ℃; t—calculated outdoor temperature for heating, ℃.
Engineering Construction Standard Full Text Information System
(2.2.1-1)
Engineering Construction Standard Full Text Information System
2. Average heat load of ventilation and air conditioning during heating period In the formula,
Qug=Qu t-te a
t,—t,
Qa is the average heat load of ventilation or air conditioning during heating period, kW; Qa is the design heat load of ventilation or air conditioning during heating period, kW; t is the indoor design temperature of ventilated or air-conditioned buildings, ℃; t, is the average outdoor temperature during heating period, ℃; t, is the calculated outdoor temperature of ventilation or air conditioning in winter, ℃. twtk
(2.2.1-2)
Article 2.2.2 The average heat load of domestic hot water in the non-heating period shall be calculated according to the following formula: Where Q*—
Qpr=Qn,-t
The average heat load of domestic hot water in the non-heating period, kW; The average heat load of domestic hot water in the heating period, kW; t,——the design temperature of domestic hot water, ℃; tu—the cold water temperature in summer (the average water temperature in the non-heating period), ℃; t
—the cold water temperature in winter (the average water temperature in the heating period), ℃. (2.2.2)
Article 2.2.3 The annual heat consumption of civil buildings shall be calculated according to the following method. 1. Annual heat consumption for heating
Q:=0.0864Q,n
Q:--Annual heat consumption for heating, GJ;
Q--average heat load for heating, kW;
n--number of days in the heating period.
2. Annual heat consumption for ventilation or air conditioning
Qu=0.0036ZQapn
Qa--Annual heat consumption for ventilation or air conditioning, GJ; Q--average heat load for ventilation or air conditioning, kW;(2.2.3-1)
(2.2.3-2)
Z--average daily operating hours of ventilation and air conditioning devices during the heating period, h,
number of days in the heating period.
3. Annual heat consumption of domestic hot water
Q:=0.0864[Qqn+Qp·z（350—n)］Q: Annual heat consumption of domestic hot water, GJ; where
Engineering Construction Standard Full-text Information System
TKAONT KAca-
(2.2.3-3)
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