Experimental Analysis on Characteristics of Energy Storage for Defrosting of Air Source Heat Pump with Phase Change Energy Storage
DONG Jian kai,JIANG Yi qiang,YAO Yang and GAO Qiang
DOI:10.11835/j.issn.1674-4764.2011.02.015
Received August 24, 2010,Revised , Accepted , Available online July 01, 2015
Volume ,2011,Pages 74-79
- Abstract
The performances of energy storage modes are experimentally analyzed in the artificial environment in order to study the effect of energy storage modes for defrosting of air source heat pump with phase change energy storage. Results indicate that suction and discharge pressures are stable at 038 MPa and 165 MPa under the series energy storage mode, and suction and discharge temperatures are 6.9℃ and 75.0℃ respectively. However, the suction and discharge pressures are as low as 012 MPa and 116 MPa in parallel and single energy storage modes individually, and the discharge temperature is up to 1225℃. In addition, in series energy storage mode, the phase change material can completely change from solid to liquid in energy storage process. The temperature difference is about 18.0℃ for indoor coil, and the input power to compressor is 825W. Therefore, the system pressures and temperatures are most stable in the series energy storage mode and the time for energy storage is short, which can meet the need of defrosting energy.