This standard specifies the energy-saving monitoring content, monitoring methods and qualified indicators of piston-type single-stage refrigeration units and their freezing, refrigeration, and air-conditioning cooling systems. This standard applies to piston-type single-stage refrigeration compressor units with refrigerants of R12, R22, and R717 and motor rated power of 30kW or more. This standard does not apply to marine refrigeration units. GB/T 15912-1995 Energy-saving monitoring methods for piston-type single-stage refrigeration units and their cooling systems GB/T15912-1995 Standard download decompression password: www.bzxz.net

ICS,27.010
National Standard of the People's Republic of China
GB/T 15912—1995
Monitoring and testing method for energysaving of single-stage reciprocating refrigerating unitand itsrefrfgerationsystemtcm
Published on December 20, 1995
Implemented on August 1, 1996
Published by the State Administration of Technical Supervision
National Standard of the People's Republic of China
Monitoring and testing method for energysaving of single-stage reciprocating refrigerating unitand itsrefrfgerationsystemtcm
Published on December 20, 1995
Implemented on August 1, 1996 Refrigeration System
1 Main content and scope of application
GB/T15912—1995
This standard specifies the energy-saving monitoring content, monitoring methods and qualified indicators of piston-type single-stage refrigerators and their refrigeration, cooling and air-conditioning cooling systems.
This standard is applicable to piston-type single-stage refrigeration compressors with refrigerants of R12, R22, R717 and motor rated power of 30kW or above.
This standard is not applicable to marine refrigeration units. 2 Reference standards
GB10875 Technical specifications for medium-sized piston-type single-stage refrigeration compressors GB11790 General specifications for equipment and cooling technology 3 Terminology
3.1 Refrigeration capacity of refrigeration unit Refrigeration capacity of refrigeration unit. The cooling capacity of a single-stage refrigeration compressor unit can be checked according to the equipment performance curve in the product manual and the working temperature of the refrigeration compressor unit. 3.2 Cooling capacity per unit input power (closed unit) cooling capacity a unit input power (semi-hermetic unit) The cooling capacity obtained by the refrigeration unit consuming unit power. 3.3 Cooling capacity per unit shaft power (open-type unit) cooling capacity of unit shuft power (open-type unit) The cooling capacity obtained by the refrigeration unit consuming unit shaft power. 4 Monitoring objectives 4.1 Monitoring and inspection items 4.1.1 The refrigeration unit should be intact and the accessories (valves, meters) should be complete. 4.1.2 The delivery pipes (cold air pipes, cold water pipes, cold pipes) shall not leak and the ground shall not accumulate water. The pipe insulation shall meet the requirements of the B standard. 1179C.
4.2 Monitoring and test items
4.2.1 Unit withdrawal power cooling ear of semi-enclosed units. 4.2.2 Unit shaft power cooling capacity of open units, approved by the State Administration of Technology on December 20, 1995
Implementation on August 1, 1996
GB/T15912-1995
4.2.3 Difference between the surface temperature of the freezing pipe insulation layer and the ring point temperature, 5 monitoring Test method
5.7 The monitoring of the refrigeration unit should be carried out under normal operation. 5.2 The accuracy of the exhaust pressure test instrument shall not be lower than level 2. The accuracy of the input power test meter shall not be lower than level 1.5. The meter shall be kept in good condition and within the calibration cycle. 5.3 The exhaust pressure and input power shall be continuously monitored, and the reading shall be recorded every 2 minutes. The arithmetic mean of the four readings shall be taken. 5.4 The unit input power cooling capacity shall be calculated as follows: EER =Q,/P:
Wherein: FER - unit input power refrigeration, k/k, (i)
, one, the refrigeration basis of the refrigeration unit, based on the suction and support pressures of the compressor, the saturated roller and saturated steam thermal energy are used to obtain the natural temperature and condensation temperature, and then according to the evaporation temperature and condensation temperature, the refrigeration release of the machine in this working state is obtained by the performance of the device, P
cold-resistant machine input power W
5.5 unit power refrigeration is calculated by the following formula: K,=Q/P.||t t||Formula, K.—axis power measurement. aw/kW: - reduction unit power, W.
5.6 Refrigeration pipe (including refrigeration pipe) with thermal layer surface overflow 1. (2)
In the non-refrigeration pipe (including refrigeration pipe) standard, select a test area, its length is not more than 20 (should include a test head). Along the length of the initial test area, 4 test points are evenly distributed (of which ~ test points are distributed at the front), and each test point is evenly distributed with + measurement points to measure the surface temperature of the insulation layer of the refrigeration pipe (including refrigeration pipe). 5.7 Environmental drop point limit seat T.
At the core test position 1, measure the corresponding dry, air temperature, check the source air temperature--·humidity base diagram. From the end point bottle, 6 monitoring qualified indicators
6.1 Refrigeration capacity qualified indicators are shown in Table 1.
Unit Korean people's energy rate system
Refrigeration compressor channel Jiankang
Low condensing power open type unitbzxz.net
Condensing pressure open type unit
Condensing power semi-closed unit
High refrigeration pressure semi-closed unit
Cold flow, cold flow
Air use
Position shaft power single refrigeration
Net freezing, freezing
3a-1-1
Air use
Secondary cold pressure single unit type
Sexual cold waist request Power open rate
High condensation power open machine
Low temperature cold service positive power semi-closed machine
Central condensation power semi-closed performance
Low temperature cold service positive power open unit
GH/T15912—1995
Continued Table 1
Unit input average cellular cooling capacity
EER.LW/AW
Ling Chen, cooling use
Choosing
Single shaft power cooling capacity
Final elimination, Ling Meng use
6.? The surface temperature of the insulation layer of the freezing pipe T corresponds to the ambient dew point temperature Tw is greater than or equal to ℃. 7 Evaluation of monitoring results
Air conditioning
7.1 The qualified indicators of the monitoring inspection items and test items of the single-stage refrigeration unit and its cooling system specified in this standard are the general standards for monitoring coverage. The monitoring unit should use this to conduct comprehensive and exclusive evaluation. Only when all monitoring indicators are qualified at the same time can it be defined as "energy-saving monitoring of single-stage refrigeration unit and its cooling system". 7.2 For those that fail to meet the monitoring requirements, the monitoring unit should analyze the waste source and propose improvements. Monitored unit
Monitored system
Monitoring basis
Monitoring station results
GB/T15912--1995
Appendix A
Active single-stage refrigeration unit and its cooling cumulative energy-saving monitoring report (supplement)
Monitoring notice
Monitoring period
Monitoring items
Semi-enclosed unit
Unit input power reduction
Open type Unit
Unit shaft power cooling capacity w/w
Temperature difference T,T
Evaluation conclusion, handling observations and suggestions,
Monitoring person in charge + (signature)
Additional notes:
Monitoring data
No.,
Qualified index
Monitoring unit: Chapter
This standard is proposed by the Department of Resource Conservation and Comprehensive Utilization of the State Energy Commission and the Standardization Department of the State Administration of Technical Supervision. This standard is under the jurisdiction of the Energy Management Subcommittee of the National Energy Basic and Standardization Technical Commission, and this standard is drafted by the Energy Monitoring Station of the Beijing Technical Supervision Bureau. The drafters of this standard are Ma Hongzhai, Lu Qian, Liu Shengli, Han Xiaolan, Jin Chuanyou, Gan
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