Study On The Calculation Of Designing Colligate Energy Efficiency Ratio In Air-conditioning Engineering Of Public Building

We often say that the central air-conditioning systems in the public buildings are mainly divided into two phases throughout its life cycles, the designing phase and the running phase. In recent years,with development of national strategies for reduction of the public buildings lots of scholars are beginning to study the energy conservation of the central air-conditioning system in the public buildings. In particular,the studies about running phase are most among numerous researches. It is very convenience because there are a lot of datas in running phase, and it is more apt to the actual situation of the central air conditioning running,the studies about the running phase are favorite for the scholars. However, as far as we know, Apart from the usually operation and management it is related with the level of design of central air-conditioning system whether the running of a central air-conditioning system is good or not. Therefore, it is improtent for us to make a good deel with the the energy conservation of the central air-conditioning system from the beginning of the design phase. As a important direction for study in the central air-conditioning systems design phase, design comprehensive energy efficiency must will have an important impact on the energy conservation study about public buildings in China. But until now, the study for design comprehensive energy efficiency is a blank. There have not to be a complete evaluation for the whole central air conditioning design comprehensive energy efficiency in the public buildings. This study will be to explore a way for us to evaluate the design comprehensive energy efficiency level of the whole central air conditioning with the study for design comprehensive energy efficiency rate as a object.The idea to calculate the design comprehensive energy efficiency rate using weighting coefficient is first proposed In this study.First,to calculate the design comprehensive energy efficiency rate on condition of partial load rejection, respectively.And then plusing them together by weighting coefficient to get the design comprehensive energy efficiency rate of the entire air conditioning system.During the analysing about the energy consumption on condition of partial load rejection, not only has introduced the computing method on condition of partial load rejection in the conditioning air-conditioning system,but also has ntroduced the computing method in the ice cool storage air condition system and the water-loop heat pump system. in the confirmation about weighting coefficients In the fifth chapter, firstly,we analysis the load characteristic yearly in different public buildings using the annual energy consumption monitoring dates of chiller from shenzhen in 2009.And then we make some imitations for the annual dynamic load and energy consumption of the air conditioning system. Finally, we get the weighting coefficients by the result from the imitations. At the end of the article, a design comprehensive energy efficiency rate of air conditioning system about a shopping mall in Shenzhen was calculated.By comparing with the conventional method, we can fand that the method used in this study is more advantages. It can better evaluate the design level of air-conditioning system.