GB/T 37292-2019 in English
VALIDAir enthalpy testing facility for test—General technical requirements
- Issued on:2019-03-25
- Implemented on:2019-10-01
- File Format:PDF
- Delivery:Via email within 5 business days
$612.00
《GB/T 37292-2019试验用空气焓值法试验装置 通用技术要求》由TC124（全国工业过程测量控制和自动化标准化技术委员会）归口，TC124SC7（全国工业过程测量控制和自动化标准化技术委员会工业在线校准方法分会）执行，主管部门为中国机械工业联合会。
Introduction
Analysis of the core content of the standard
This standard specifies the technical requirements for the air enthalpy method test device in the performance test of equipment such as air conditioners and heat exchangers, covering the accuracy indicators of key measuring instruments such as platinum resistance and thermocouple.
System composition and technical indicators
| Subsystem | Technical requirements | Allowable error |
|---|---|---|
| Temperature measurement system | -20℃~80℃ | ±0.1℃ |
| Humidity measurement system | 10%~95%RH | ±3%RH |
| Air volume measurement device | 15~35m/s flow rate | Air leakage rate≤1% |
Key innovation points
1. Standardized measurement method: For the first time, the calculation formula for the nozzle flow coefficient of the enthalpy difference method test device was unified (see Appendix C), and the iterative method was used to ensure the calculation accuracy.
2. Dynamic control requirements: It is stipulated that the temperature fluctuation during the stable judgment period must be controlled within ±0.3℃ (Table 2), which is 20% more accurate than the old standard.
Implementation suggestions
- Regularly check the sealing of the air volume measurement device (Appendix F), the recommended cycle is ≤1 year
- When inspecting the electric heating calibration device, ΔT should be ensured to be within the range of 15~20℃ (Appendix E)
- Humidity measurement requires daily replacement of wet-bulb gauze and use of distilled water
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
