An evaluation index of engineering cold source system based on IPLV/NPLV method of chiller products

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.