发电与空调Issue(4)：52-55,79,5.DOI:10.3969/J.ISSN.2095-3429.2015.04.015
水冷冷水机组测量不确定度研究
Measurement Uncertainty Research for Water-cooled Chillers
茹志鹏 1樊海彬 2贾磊 2钱雪峰 2刘开胜1
作者信息
- 1. 重庆美的通用制冷设备有限公司，重庆 401336
- 2. 合肥通用机械研究院，安徽 合肥 230031
- 折叠
摘要
Abstract
Measurement uncertainty is of significance in performance testing for water-cooled chillers. This article selects water cooled chillers with 850kW of nominal cooling capacity as its study objects, and adopts the liquid refrigerant method and the heat balance method as its testing and checking methods in accordance with the provisions of GB/T 10870-2014. Based on the evaluation model, the uncertainty obtained by tests is assessed, and the effect of trends of all di-rect measured parameters on uncertainty are also analyzed. The results show that the inlet/outlet water temperature is the most important factor affecting uncertainty measurement. When the precision of temperature and flow rate measuring is 0.05℃ and 0.5% respectively, the inlet/outlet water temperature contributes up to 67.5% to the combined standard uncer-tainty. If the temperature measuring precision is modified to 0.08℃or 0.1℃, the uncertainty of evaporator cooling capacity will increase from 1.8% to 2.7% or 3.3%, and that of condenser cooling capacity will increase from 2.2% to 3.4% or 4.2%.关键词
水冷冷水机组/测量不确定度/精度Key words
water-cooled chillers/measurement uncertainty/precision分类
建筑与水利引用本文复制引用
茹志鹏,樊海彬,贾磊,钱雪峰,刘开胜..水冷冷水机组测量不确定度研究[J].发电与空调,2015,(4):52-55,79,5.
