基于冷水机组产品IPLV/NPLV方法的一种工程冷源系统评价指标探讨
An evaluation index of engineering cold source system based on IPLV/NPLV method of chiller products
摘要：
综合部分负荷性能系数(IPLV)、非标准部分负荷性能系数(NPLV)对冷水机组部分负荷性能的评价具有重要意义,但在实际应用中仍存在局限,并不能直接用来指导冷源设备的选型。本文针对IPLV/NPLV的局限性和公式特点提出了建筑冷源总季节性能系数(SCECz)指标,并对其各个关键项作对比。以上海市某酒店建筑为例,提出对称分布和非对称分布2种机组群运行方案进行对照实验,最终得出非对称分布机组群更适合该建筑,相比对称分布机组群节能2.79%的结论。由此探索出SCECz指标在实际工况下对建筑冷源设备选型评价的可行性,为今后公共建筑节能设计标准的修订提供参考。
Abstract：
The integrated part load value (IPLV) and the non-standard part load value (NPLV) are of great significance for the evaluation of part load performance of chillers,but they still have limitations in practical application,and can not be directly used to guide the selection of cold source equipment.Therefore,the seasonal coefficient of energy consumption for building cold source (SCECz) index is proposed for the limitations of IPLV/NPLV and the characteristics of the formula,and the key items are compared.Taking a hotel building in Shanghai as an example,two operation schemes of symmetrical distribution and asymmetrical distribution of units are proposed for comparison experiment,and it is concluded that the asymmetrical unit group is more suitable for the building than the symmetrical unit group,with an energy saving effect of 2.79%.Therefore,the feasibility of SCECzindex on the selection evaluation of building cold source equipment under actual working conditions is explored,which will provide a reference for the revision of energy conservation design standards for public buildings in the future.
Keywords:building energy consumption; chiller; integrated part load value (IPLV); non-standard part load value (NPLV); seasonal coefficient of energy consumption for building cold source; coefficient of performance (COP); HVAC design