空调水系统定流量改为变流量方案的探讨

The feasibility study to convert constant flow system into variable flow systems

首先分析了现有空调系统存在的问题,并指出这些问题所带来的严重后果,提出应对原有系统进行改进。然后分析两种控制方式在改进方案中的优劣,指出按照回水温度控制的方式改造是比较适合的;分析了改进方案的理论根据,指出这是由于过去设计保守和盘管本身热力特性等原因决定的。最后通过工程实例说明节能的效果,并给出适合改造的工程所应具备的条件。

Firstly, after analyses of questions in the operated air-condition system, it is advised that the systems in existence should be improved.Secondly, after comparisons of two control schemes, it is conclued that the scheme of controlling return water temperature is suitable. The improving scheme is theoretically analyzed, aiming at solving problems from past overconservative design and thermodynamic characteristic of coils. At last, two typical engineering examples, which testify the energy-saving effects and the realistic conditions needing for fit-to-change engineering,are given.