The problem of inconsistency between the measurement results of the cooling capacity of room air conditioners between environmental chambers still plagues China′s air-conditioning industry and is a meteorological problem that easily leads to conflicts in international trade.A standard cold-source device that can calibrate laboratory measurement results of the enthalpy difference needs to be urgently studied.In this study,a standard cold-source device based on ice slurry refrigeration is proposed,including an ice slurry preparation system and a heat exchange system,based on a study of several mainstream cooling capacity measurement methods for room air conditioners and the research status of standard cold-sources at home and abroad,combined with an in-depth understanding of the physical process of ice slurry refrigeration.Experimental research and refrigeration capacity uncertainty analysis are conducted to verify whether the standard cold-source device could calibrate the enthalpy difference laboratory.The experimental results show that the relative uncertainty of the measured cooling capacity of the standard cold-source device in the enthalpy difference chamber can reach 1.2%when setting 0℃on the ambient side and setting the standard cooling condition on the room side with mass flow rate of 70 g/s,which is approximately 1/3 of the air enthalpy method and can be used as a standard cold source to calibrate the cooling capacity measurement results of the enthalpy difference chamber,which can help improve the international competitiveness of the refrigeration industry.
关键词
冰浆制冷/标准冷源/焓差室/空气焓值法/校准/相对不确定度
Key words
ice slurry refrigeration/standard cold source/enthalpy difference chamber/air-enthalpy test method/calibration/relative uncertainty
维普
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