空调冷冻水系统末端定压差法中控制带的研究

Research of Control Zone of Constant Pressure at the End Circle Method in Air Conditioning Water System

本文首先从理论上分析了空调冷冻水系统末端定压差控制方法中,在同一流量需求下,由于用户负荷分布不同,系统对水泵的扬程需求也不同,即实际空调冷冻水系统中用户非等比例负荷变化时,所有系统运行工况点组成的是控制带,而不是控制曲线。并通过实验验证了控制带的存在,指出对于空调冷冻水系统末端定压差控制方法还需要进行更深入的研究。

At first, the control method of constant pressure at the end circle in theories was analyzed in this paper, and the pump’s head varies with the distribution of consumer load was pointed out. That is all the working point form a control zone, not a curve, when consumer load vary at different rate in actual system. Then the control zone’s existence through experiments was verified. And the study of the control method of constant pressure at the end circle needs further and deeper consideration was pointed out.