Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T5833-1991
Pure water cooling device for power converter
Published on October 24, 1991
Implementation on October 1, 1992 by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
Pure water cooling device for power converter
Subject content and scope of application
This standard specifies the technical requirements and test methods for pure water cooling devices. JB/T5833-1991
This standard applies to pure water cooling devices for power converters, and also to pure water cooling devices for other electrical equipment with certain requirements on water quality (hereinafter referred to as cooling devices)
2 Reference standards
GB 998
GB2682
GB3859
ZBK46006
Basic test methods for low-voltage electrical appliances
Color of indicator lights and buttons in electrical complete sets Semiconductor power converters
Electrochemical rectifiers
Product classification and basic parameters
3.1 Product model
The model of the cooling device adopts the following compilation method: LSO O
Description character B
Cooling capacity
With spare heat exchanger
High purity
Design serial number
rS—Water
-Secondary cooling medium {F-Wind
Main cooling medium (pure water)
Cooling device
3.2 Product classification
According to the difference of secondary cooling medium, cooling devices are divided into two categories: water-to-water heat exchange type and water-to-air heat exchange type. 3.3 Product specifications
3.3.1 The cooling capacity of the cooling device should be selected from the following values: 10, 20, 30, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500kW. 3.3.2 The basic parameters of the cooling device shall comply with the provisions of Table 1: Approved by the Ministry of Machinery and Electronics Industry on October 24, 1991 and implemented on October 1, 1992
Specification and model
LSS--10
LSS--20
LSS—30
LSS--40
LSS—-50
LSS—80
LSS-100
LSS--125
LSS-160|| tt||ESS--200
LSS—250
LSS~-315
LSF--50
LSF—100
LSF160
LSF—200
LSF-—250
Technical requirements
Normal working conditions
Cooling capacity
JB/T5833-1991
Main water flow
Daily average temperature does not exceed +35℃.
Ambient temperature is +5~+40℃,
Relative air humidity does not exceed 90% (at 20±5%). Altitude does not exceed 1000m.
The input voltage fluctuation of the cooling device control cabinet does not exceed ±10%. Auxiliary water flow
Main water pipe interface diameter
There is no conductive or explosive dust at the operating site, and no gas or steam that corrodes metal or destroys insulation. The cooling device should not vibrate or impact violently when working, and the verticality of installation should not exceed 5%. Auxiliary cooling water should meet the following requirements:
a) Suspended matter is not more than 30mg/l;
b) pH value is 6~9;
c) Hardness does not exceed German scale 12 (equivalent to 0.12g CaO per liter of water); d) Inlet pressure is not less than 0.15MPa:
e) Inlet water temperature is +5~+30℃.
4.2 Abnormal working conditions
Electric power of the whole machine
JB/T5833-1991
Any environmental conditions that are not the above normal working conditions are regarded as abnormal working conditions. If the cooling device is used in abnormal working conditions, the user should raise this issue when placing an order and obtain an agreement with the manufacturer. 4.3 Appearance
a) All components of the cooling device should be installed correctly and evenly without obvious misalignment or looseness; 6) The container and pipeline should not have obvious sinking, explosion, or stains; e) The paint should be evenly applied without defects such as shedding, shedding, scratching, or cracking; d) The color of the indicator light should comply with the provisions of GB2682. 4.4 Components
The components on the cooling device shall comply with the provisions of relevant standards: 45° Insulation strength
The insulation resistance between live parts and the casing shall not be less than 15MO, and the insulation resistance between live parts and the ground (casing) shall be able to withstand a working test voltage of 2000V for 1min. 4.6 GroundingWww.bzxZ.net
The electrical conductivity between the accessible metal parts of the control cabinet and the grounding point shall not be greater than 0.10: The grounding point shall have an obvious grounding mark. 4.7 Main water performance
4.7.1 Main water quality
The main water conductivity is expressed by conductivity. When the main water temperature is 25, its value shall comply with the following provisions: a) The sound conductivity level is not greater than 0.5mS/m (applicable to the host working voltage not greater than 630V) 5) The high purity level is not greater than 0.1mSm (applicable to the host working voltage of 630-1250V) Note: For high-voltage devices. The cooling maintenance of the water supply power is as high as direct washing. After negotiation between the user and the manufacturer, higher requirements are shown for the water quality. When the industrial water with the water quality of 6-10 primary S/product is produced in the machine, at the rated flow rate, after being treated by the ion exchanger of the cooling device for 3h (this time is the water quality improvement time), the main water quality should be able to reach the above-mentioned guaranteed reliability. 4.7.2 Main water flow rate
When the main water head is 0.15MP (or determined by the agreement between the user and the manufacturer), its volume should meet the requirements of Table 1. 4.7.3 Main water outlet temperature
The main water outlet temperature of the cooling device should be +5~435℃ under normal working conditions. 4.8 Cooling capacity
The logarithmic average temperature of the main heat exchange medium is taken as follows: The cooling capacity of the cooling device should comply with the operating conditions in Table 1. Water-to-water heat exchange type takes 5K:
b) Water-to-air heat exchange type takes 8K:
49. The heat transfer coefficient of the heat exchanger components should comply with the following regulations at the rated flow rate: ) Water-to-water heat exchanger shall not be less than 3500W/(m+K) b) Water-to-air heat exchanger shall not be less than 65W (mK) 4.10 Monitoring and protection Performance
4.101 The cooling device should have a main water working guarantee system and should have switchable water pumps. When the working water ticket fails, the starting circuits of each pump and the relevant network doors will automatically switch, and the switching time shall not exceed 05. 4.10.2 The cooling device should only have the following measurement functions:3
a) main water inlet temperature;
b) main water outlet temperature;
c) main water outlet pressure;
d) main water flow;
e) main water quality;
f) auxiliary water inlet temperature:
g) auxiliary water inlet pressure.
JB/T5833-1991
4.10.3 The cooling device should be able to send out fault signals in the following cases: a) Water pump failure:
b) Main water temperature is too high;
c) Main water temperature is too low;
d) Main water flow is too small;
e) Main water pressure exceeds the specified value;
f) Main water pressure is lower than the specified value;
g) Main water quality is lower than the specified value;
h) Main water level is lower than the specified value.
4.10.4·When the main water temperature is lower than the ambient dew point temperature, the cooling device should be able to heat the main water. 4.10.5 When the system is shut down during operation, the cooling device should automatically pressurize the load water channel with a pressure difference of not less than 0.01MPa. 4.11 The cooling device should have automatic gas collection and exhaust functions to discharge the original gas in the pipeline and the gas generated during operation at any time. 4.12 Noise
The noise of the cooling device should comply with the provisions of Table 2 (A-weighted sound pressure level); Table 2
Cooling capacity kw
Noise B
4.13 Pressure resistance and leakage
100~160
200~315
50-160
200-250
The cooling device pipeline (excluding water pump) should be able to withstand a water pressure of not less than 0.6MPa and maintain it for 30 minutes. There should be no cracks or water seepage in the pipeline.
When working normally, the leakage of the main water of the cooling device shall not exceed 20ml/l1. 5 Test method
5,1 General inspection
a) According to 4.3. a) Check the functions of components such as contactors, relays, pumps, fans, etc.; c) Check whether the wiring, welding, marking and numbering of the electrical parts meet the requirements of the design documents and relevant standards. 5.2 Insulation test
Carry out in accordance with the provisions of 6.2, 6.3 of GB998 and 4.5 of this standard. 5.3 Measurement of grounding resistance of accessible metal parts JB/T5833-1991
This test verifies the continuity of grounding by measuring the grounding resistance between the main grounding point of the cabinet and the metal parts that may be touched. Before measuring, the power supply of the control cabinet should be disconnected and the oil stains at the measuring point should be cleared. Measuring instruments: milliohmmeter (level 2.5), Kevin bridge. During the test, the direct measurement method is used to connect the terminals of the instrument to the grounding terminals and the cabinet shell or the conductive metal parts to be grounded. If the measured value meets the requirements of 4.6, it is considered qualified. 5.4 Measurement of the time for the main water quality to rise
This test measures the time for the main water quality to rise to assess the water treatment capacity of the cooling device. Measuring instruments: conductivity meter (level 1.5), flow meter (level 0.5). Test procedure:
a) Connect the main water pipeline and connect the conductivity meter and flow meter to it; b) Inject industrial water with a water quality of 6~10mS/m into the pipeline, start the water pump, and adjust the pipeline valve to make the main water flow reach the specified value;,
c) Turn on the ion exchanger and start timing at the same time to observe the rise in the main water quality. If the main water quality can gradually rise to the specified value within 3h, it is considered qualified. 5.5 Monitoring and protection performance test
The purpose of this test is to detect whether the electrical circuit of the cooling device can play a control and protection role when an abnormal situation occurs. Measuring instruments: Conductivity meter (1.5 level)
Water pressure gauge (0.4 level)
Thermometer (error is not more than ±0.2℃): Flow meter (0.5 level) Measurement procedure:
Connect the valves in series, connect the main water pipeline, connect the flow meter and permanent pressure gauge into the pipeline, and check the protection performance of the cooling device one by one according to the following steps.
a) Set an upper limit temperature value lower than the actual pointer temperature and a lower limit temperature value higher than the actual pointer temperature respectively. The cooling device should be able to send out a corresponding fault signal of the main water temperature being too high or too low: b) Replace the conductivity electrode with an adjustable resistor, adjust the resistor so that its resistance value is lower than 1/2 of the specified value of the main water resistivity, and the cooling device should be able to send out a fault signal of the main water quality being too low; c): Adjust the pipeline valve so that the main water pressure is higher and lower than the specified value respectively, and the cooling device should be able to send out a corresponding fault signal. Adjust the valve to reduce the main water flow to 1/2 of the specified value, and the cooling device should be able to send a fault signal that the main water flow is too low; d) Simulate overload for the working pump control circuit, the standby pump should be able to start within the specified time, and the relevant valves should also be able to switch automatically. Then disconnect the power supply of the standby pump so that both pumps cannot start, measure the water pressure in the main water pipeline, and it should meet the requirements of 4.10.5; e) Set a simulated dew point temperature higher than the main water temperature, the main water heating circuit should be able to start and heat the main water. When the simulated dew point temperature is lower than the main water temperature, try to press the heating button, and the main water heating circuit should not be able to start. The above tests are considered qualified if they meet the corresponding requirements of 4.10. 5.6 Pipeline pressure test
Connect the main water inlet and outlet white pipes into a loop (short-circuit the water pump), apply a water pressure of 0.6MPa to the pipes, and keep it for 30 minutes. There should be no cracks or water seepage in the pipes.
Connect the water pump, adjust the water pressure in the pipeline to 0.25MPa, measure the leakage of the cooling device, and if the value does not exceed the provisions of 4.13, it is considered qualified.
5.7 Hydraulic performance test
JB/T5833-1991
The purpose of the hydraulic performance test is to measure the main water outlet pressure, flow rate and the relationship between the two when the cooling device is working normally. Test instrument: water pressure gauge (0.4 level) flow meter (0.5 level) Measurement procedure:
a) Connect a valve in series at the inlet connection of the main water circuit, and connect the water pressure gauge and flow meter in series to the circuit. Turn on the water pump, adjust the valve so that the main water pressure loss is 0.15MPa, and measure its flow rate. If the measurement result meets the requirements of 4.7.2, it is considered qualified; b) Adjust the valve, measure and record the flow value under different pressures. Draw a rectangular coordinate system, with the horizontal axis indicating the flow value and the vertical axis indicating the pressure value. Plot the measured results into the coordinate system to obtain the hydraulic characteristic curve of the device under test.
5.8 Thermal performance test
This test mainly evaluates the heat transfer performance of the cooling device by measuring the logarithmic mean temperature difference and the heat transfer coefficient. In the test, an electric heater is used as a simulated load. The power of the electric heater varies with the different cooling devices under test, and its value should comply with the provisions of Table 3.
Cooling capacity kw
Electric heater power kw
5.8.1 Test of water-to-water heat exchange cooling device 40~63
80~125
160~200
Measuring instruments: four thermometers (error is not more than ±0.2℃), two flow meters (0.5 level). Measurement procedure:
250-315
a) Connect the main and auxiliary water pipes of the cooling device, and connect the flowmeters in series respectively. Four thermometers are installed at the main and auxiliary water inlet and outlet of the heat exchanger respectively;
b) Turn on the water pump and adjust the main water flow to the specified value: Turn on the electric heater, and when the main water temperature rises to 10℃ higher than the auxiliary water temperature, open the auxiliary water and adjust the valve to make its flow reach the specified value. Observe the temperature of each point, and start recording the temperature value of each point after it is relatively stable. Observe continuously for 10 minutes, record the temperature of each point when the temperature changes, and substitute it into the following formula to calculate the logarithmic mean temperature difference △Tm: (Thz - Te2)- (Tu - Te)
In(Th2 - Te2)/(T - T)
Where: △T,—logarithmic mean temperature difference, K; Tn—main water inlet temperature of heat exchanger, K; Thz2—main water outlet temperature of heat exchanger, K; T. - heat exchanger auxiliary water outlet temperature, K; T. heat exchanger auxiliary water inlet temperature, K. c) Calculate the heat transfer according to the main water inlet and outlet temperatures. Q=c9m4T·
Where: Q-heat transfer of main water flowing through the heat exchanger, kW; -specific heat of main water, kJ/(kg·K);
（1）
·（2）
qm——mass flow rate of main water, kg/s; AT main water inlet and outlet temperature difference, K.
d) Calculate the heat transfer coefficient of the heat exchanger according to the following formula: K=
: K-heat transfer coefficient, kW/(m2.K);
Q heat transfer, kW;
A-heat transfer area, m2;
JB/T5833-1991
△T——arithmetic mean of several groups of △T measured in b; F correction factor, here F=l.
e) Substitute the K value calculated in d into formula (3), T, take the value according to 4.8, and calculate the cooling capacity Q of the cooling device. If the cooling capacity value meets the requirements of 4.8, it is considered qualified. ! Test measuring instruments for water-air heat exchange cooling device: four leak meters (error is not more than ±0.2℃) and one flow meter (0.5 level). Measurement procedure:
a) Connect the main water pipeline of the cooling device, connect the flow meter in series, and install four thermometers at the main water inlet and outlet and the air duct inlet and outlet respectively: b) Turn on the water pump and adjust the main water flow to the specified value; turn on the electric heater, and when the main water temperature rises to higher than the ambient air temperature, turn on the fan. Observe the temperature of each point, and after it is relatively stable, start recording the temperature value of each point. Observe for 10 minutes continuously, and record the temperature of each point when there is a change, and substitute it into formula (1) to calculate the logarithmic mean temperature difference △T. c) Calculate the heat exchange according to formula (2):
d) Calculate the heat transfer coefficient of the heat exchanger according to formula (3). The value of F in the formula is selected according to Figure 1: e) Substitute the K value calculated in d into formula (3), and take 4Tm according to 4.8 to calculate the cooling capacity Q of the cold part device. If the cooling capacity value meets the requirements of 4.8, it is considered qualified. Noise measurement
During the test, the level of ambient noise should be at least 6dB lower than the noise of the device, and there should be no sound reflection surface within 3m of the device under test (except for the ground strip).
Starting from the point facing the product, 1m away from the product shell, and half the height of the product, take a point every 1m around the product. Place the microphone on the reference point and measure the noise once. Take the arithmetic mean of each point as the measured noise of the device. The noise value meets 4.12, it is considered qualified. , Continuous operation test
To ensure the reliability of the cooling device, after each individual test is qualified, the whole machine continuous operation test should be carried out. During the test, the main and auxiliary water pipes are connected, the power is turned on, and the whole machine is turned on. Adjust the valves of the pipeline so that the main water flow, pressure water quality, etc. reach and maintain the rated value, observe the main components such as the motor, water pump, fan heat exchanger, etc., and no abnormality should occur during the test period, and the main water leakage should remain at the normal value or below. The time of the continuous operation test is 48h for type test and 6h for factory test. 6 Inspection rules
T, -T,
JB/T5833-1991
0.70.80.9
Figure 1 Correction factor curve of single-flow cross-flow heat exchanger The performance test of the device is divided into factory test and type test, and the test is usually carried out in the factory. When there are no conditions for manufacturing (such as large-capacity cooling devices), it can be carried out on site according to the agreement. Before the device undergoes factory testing, various internal units are products that have passed the inspection and test. Only after passing the factory test and attaching the product certificate can it be shipped. 6.1 Type test
Type test is a test that comprehensively assesses the performance and quality of the product and verifies whether the product meets the technical requirements. Products with the following conditions should undergo type testing: a) Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c) When the product is discontinued for 2 years or more and production is resumed: d) When the factory test results are significantly different from the last type test; e) When the national quality supervision agency proposes a type test requirement. The number of products sampled for batch production shall not be less than two. If one unit fails in one item during the test, it shall be returned for re-inspection. If it still fails in the re-inspection, the type test of the product shall be judged to be unqualified. Production must be carried out only after the defects are eliminated and the test is passed. 6.2 Factory test
In order to evaluate the product performance and ensure that the product performance meets the corresponding test requirements in the type test, the assembled devices must be tested one by one.
If the factory test is qualified, a test certificate should be issued. JB/T5833-1991
If one item does not meet the requirements during the factory test, it is allowed to be returned for retesting. Only after passing the retest can the factory test certificate be issued. Test items
The items of type test and factory test are shown in Table 4. Table 4
Test items
General inspection
Continuity test
Measurement of grounding resistance
Test of main water quality rise time
Monitoring and protection performance test
Pipeline pressure test
Hydraulic performance test
Thermal performance test
Noise measurement
Continuous operation test
Marking, packaging, transportation, storage
7.1 Marking
7.1.1 Product marking
The content of the product nameplate should include:
a) Manufacturer name;
b) Product model, number, name and manufacturing date; Test classification
Dual-mode test
c) Main parameters of the product: cooling capacity, main and auxiliary water flow, whole machine electrical power, etc. 7.1.2 Packaging mark
The following marks shall be marked on the outside of the packing box:
a) Product model, name and factory number; b) Net weight of the product and gross weight including the packing box; c) Destination (port) and receiving unit;
d) Departure station (port) and shipping unit:
e) Packing date;
f) Position mark "↑" and the word "upward" written on the upper part of the arrow; g) Loading and unloading methods and marks.
7.2 Packaging
Factory test
7.2.1 The packaging of the product shall comply with the relevant requirements of the packaging and transportation specifications to ensure that the product is transported and stored. It will not be mechanically damaged during the process and has the ability to prevent rain and dust.
7.2.2 Random documents
a) Product certificate;
JB/T5833-1991
b) Electrical schematics, assembly drawings, wiring diagrams and instructions required for use and maintenance: c) Spare parts list and instructions for major purchased parts; d) Packing list.
7.3 Transportation
During transportation, the product should not be subjected to severe vibration, impact or inversion. The transportation temperature should be between -25~+55℃. 7.4 Storage
7.4.1 For short-term storage (generally not more than 3 months), the temperature should be kept above 0℃. The pure water in the machine can be retained. If it is stored for a long time, the pure water should be removed. Release, the ion exchange resin in the ion exchanger should be taken out and stored separately, and ensure that it does not dehydrate. 7.4.2 The product should not be exposed to the sun and rain for a long time, and should be stored in a warehouse with good air circulation, the ambient medium temperature is within the range of -25~+55℃, the maximum relative humidity of the air does not exceed 95% (equivalent to the air temperature of 20±5℃), and there is no corrosive gas. The ion exchange resin should be stored in an environment of +5~+55℃. 7.5 Product Quality Assurance
Under the condition that the user complies with the storage, use, installation and operation regulations, within 12 months from the date of installation, or within 18 months from the date of shipment from the manufacturer, if the product is damaged or malfunctions due to poor quality, the manufacturer is responsible for repairing and replacing parts for the user free of charge.2 Random Documents
a) Product Certificate of Qualification;
JB/T5833-1991
b) Electrical schematics, assembly drawings, wiring diagrams and instructions required for use and maintenance: c) List of spare parts and instructions for major purchased parts; d) Packing list.
7.3 Transportation
During transportation, the product should not be subjected to severe vibration, impact or inversion, and the transportation temperature should be between -25~+55℃. 7.4 Storage
7.4.1 For short-term storage (generally no more than 3 months), the temperature should be kept above 0℃, and the pure water in the machine can be retained. If stored for a long time, the pure water should be released, and the ion exchange resin in the ion exchanger should be taken out and stored separately, and it should be ensured that it is not dehydrated. 7.4.2 The product should not be exposed to the sun or rain for a long time, and should be stored in a warehouse with good air circulation, ambient medium temperature within the range of -25~+55℃, maximum relative humidity of air not exceeding 95% (equivalent to air temperature of 20±5℃), and no corrosive gas. Ion exchange resin should be stored in an environment of +5~+55℃. 7.5 Product Quality Assurance
If the user complies with the storage, use, installation and operation regulations, within 12 months from the date of installation, or within 18 months from the date of shipment from the manufacturer, if the product is damaged or malfunctions due to poor quality, the manufacturer shall be responsible for free repair and replacement of parts for the user.2 Random Documents
a) Product Certificate of Qualification;
JB/T5833-1991
b) Electrical schematics, assembly drawings, wiring diagrams and instructions required for use and maintenance: c) List of spare parts and instructions for major purchased parts; d) Packing list.
7.3 Transportation
During transportation, the product should not be subjected to severe vibration, impact or inversion, and the transportation temperature should be between -25~+55℃. 7.4 Storage
7.4.1 For short-term storage (generally no more than 3 months), the temperature should be kept above 0℃, and the pure water in the machine can be retained. If stored for a long time, the pure water should be released, and the ion exchange resin in the ion exchanger should be taken out and stored separately, and it should be ensured that it is not dehydrated. 7.4.2 The product should not be exposed to the sun or rain for a long time, and should be stored in a warehouse with good air circulation, ambient medium temperature within the range of -25~+55℃, maximum relative humidity of air not exceeding 95% (equivalent to air temperature of 20±5℃), and no corrosive gas. Ion exchange resin should be stored in an environment of +5~+55℃. 7.5 Product Quality Assurance
If the user complies with the storage, use, installation and operation regulations, within 12 months from the date of installation, or within 18 months from the date of shipment from the manufacturer, if the product is damaged or malfunctions due to poor quality, the manufacturer shall be responsible for free repair and replacement of parts for the user.
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