Experimental Analysis on Power Consumption of Chilled Water Pump by Constant Pressure Difference Method with Bypass Valve |
| |
Authors: | LIU Jin-ping ZOU Wei and LIU Xue-feng |
| |
Institution: | School of Electric Power; b. State key Laboratory of Subtropical Building Science,South China University of Technology, Guangzhou 510640,P.R.China;School of Electric Power,South China University of Technology, Guangzhou 510640,P.R.China;School of Electric Power,South China University of Technology, Guangzhou 510640,P.R.China |
| |
Abstract: | The power consumption of frequency conversion chilled water pump of an office building regulated by constant pressure difference method with bypass valve is studied experimentally. A model of power consumption of chilled water pump is proposed. The effects of pressure difference set point of bypass valve on instantaneous and annual power consumption of chilled water pump are analyzed. The simulation results are validated experimentally, which shows that there is a maximum water flow rate which increases with the increase of the pressure difference set point of bypass valve at equilibrium state. There are three pressure operation regions of the bypass valve: under pressure region, constant pressure region and over pressure region. The power consumption of frequency conversion chilled water pump is affected by the pressure difference set point of bypass valve significantly, and it would be minimized as the pressure difference set point of bypass valve is equal to the pressure difference between supply water and return water of the farthest user. |
| |
Keywords: | chilled water pump bypass valve pressure difference power consumption |
|
| 点击此处可从《保鲜与加工》浏览原始摘要信息 |
| 点击此处可从《保鲜与加工》下载免费的PDF全文 |
|