空调系统需求特性对过量供应程度的影响

Influence of Load Feature on the Degree of Over-supply in the Centralized Air Conditioning System

在集中式空调系统中,往往存在过量供应的现象。这种过量供给所造成的能源浪费实际上要远大于集中方式效率高所减少的能源消耗。因此有必要对集中式空调系统中的过量供应问题进行分析和研究。在空调系统中,需求的不同步性对空调系统中的过量供应程度具有很大影响。需求的不同步性体现在同一瞬间,同一个空调系统中的各个空调末端面对的需求参数是不一致的,可能存在较大的差异性,而且各末端需求的差异程度将随着时间发生变化。在本研究中,提出采用基尼系数定量刻画需求的不同步特性,进而分析几类典型的空调末端调控方式下,需求不同步性与过量供应程度的定量关系。

The phenomenon of over-supply is common in centralized AC systems. In fact,the waste of energy consumption caused by over-supply is much larger than the energy saving due to the high efficiency in centralized system. Therefore,it is necessary to conduct researches and analysis on the problem of over-supply in centralized AC systems. The out-of-sync load feature influences the degree of over-supply in the AC system greatly. The out-ofsync load feature means that in a certain moment,the demands of each zones are inconsistent,and the differences are changed along the time. In this research,the Gini index is applied to describe the out-of-sync load feature in a quantitative way. Meanwhile,several AC terminal control methods are analyzed to reveal the relationship between the out-of-sync load feature and the degree of over-supply in the AC system.