采用水焓值法的制冷量源及其不确定度分析

发布时间：2018-11-07 18:19

【摘要】：制冷量量值统一对促进空调器行业节能减排有基础性作用,采用水焓值法的制冷量源能够应用于制冷量的量值传递,提供数值可测、可控的制冷量量值。首先,提出了水焓值法制冷量源的装置原理,减少了输出制冷量测量参数;然后,设计并研制了制冷量源实验装置,并在平衡环境型量热计中进行了实验研究,实验结果显示,量热计测得值与冷量源输出制冷量最大相对偏差不超过±0.7%;最后,详细给出制冷量源的不确定度评定过程和结果:制冷量源重复性为11.4 W,源输出由1 660.8增大至5 810.4 W时,合成标准不确定度由12.3增大至18.2 W,对应相对扩展不确定度由1.5%(k=2)减小至0.6%(k=2)。采用水焓值法的制冷量源第1次从计量学角度实现了制冷量量值的溯源,输出量值可溯源至温度、压力、流量和功率单位,可作为校准制冷量测量装置的标准源使用。
[Abstract]:The unification of refrigerating capacity and value plays a fundamental role in promoting energy saving and emission reduction in air conditioner industry. The refrigerating capacity source using the method of water enthalpy can be applied to the quantity transfer of the refrigerating capacity, providing a numerically measurable and controllable refrigerating capacity value. Firstly, the device principle of the refrigerating capacity source with water enthalpy method is put forward, which reduces the measurement parameters of the output refrigerating capacity. Then, the experimental device of refrigerating capacity source is designed and developed, and the experimental research is carried out in the balanced environment calorimeter. The experimental results show that the maximum relative deviation between the calorimeter and the output refrigerating capacity of the cooling source is not more than 卤0.7. Finally, the evaluation process and results of uncertainty of the refrigerating capacity source are given in detail. When the repeatability of the refrigerating capacity source is 11.4W and the source output increases from 1 660.8 to 5 810.4 W, the synthesis standard uncertainty increases from 12.3 to 18.2W. The relative spread uncertainty decreased from 1.5% (KG ~ 2) to 0.6% (KN ~ 2). The refrigerating capacity source using the method of water enthalpy is traceable to the source of the refrigerant quantity from the viewpoint of metrology for the first time. The output value can be traced to the unit of temperature, pressure, flow rate and power. It can be used as the standard source of the calibrated refrigerating capacity measurement device.
【作者单位】：北京工业大学环境与能源工程学院;中国计量科学研究院新能源环境计量研究所;
【基金】：国家自然科学基金(51376010)项目资助
【分类号】：TB61

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