scholarly journals Experimental Study of the Performance of Air Source Heat Pump Systems Assisted by Low-Temperature Solar-Heated Water

2013 ◽  
Vol 5 ◽  
pp. 843013 ◽  
Author(s):  
Jinshun Wu ◽  
Chao Chen ◽  
Song Pan ◽  
Jun Wei ◽  
Tianquan Pan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Low Temperature ◽  
Heat Pump ◽  
Heated Water ◽  
Air Source Heat Pump

AN EXPERIMENTAL STUDY ON PERFORMANCE IMPROVEMENT FOR AN AIR SOURCE HEAT PUMP BY ALTERNATE DEFROSTING OF OUTDOOR HEAT EXCHANGER

2014 ◽  
Vol 22 (03) ◽  
pp. 1450017 ◽  
Author(s):  
HOON JUNG ◽  
JUNGHO HWANG ◽  
CHANGDUK JEON
Keyword(s):  
Experimental Study ◽  
Heat Exchanger ◽  
Low Temperature ◽  
Performance Improvement ◽  
Heat Pump ◽  
Heating Surface ◽  
Coefficient Of Performance ◽  
Space Heating ◽  
High Humidity ◽  
Air Source Heat Pump

For a space heating air source heat pump (ASHP) in the condition of low temperature and high humidity, frost on the surface of heat exchanger becomes the major cause decreasing heating surface area and thus the performance of heat pump. In this study, we showed a method of delaying the implantation of frost using alternate defrost control. First, we acquired the performance data for conventional periodic reversed-cycle defrosting with a 5RT heat pump. After the experiment, the heat pump was modified to verify the effects of newly introduced alternate defrosting and compared with the conventional periodic reverse cycled method. It was found that heating coefficient of performance (COP) of heat pump using newly proposed alternate defrost method was about 17% higher than conventional heat pump using periodic reverse cycled defrosting.

Experimental Study of a Solar Assisted Air Source Heat Pump in Heating Condition

2011 ◽  
Vol 243-249 ◽  
pp. 4909-4912
Author(s):  
Yin Liu ◽  
Guang Hui Zhou ◽  
Jing Ma
Keyword(s):  
Experimental Study ◽  
Low Temperature ◽  
Heat Pump ◽  
Outdoor Environment ◽  
Heating Condition ◽  
Heating Performance ◽  
Temperature Conditions ◽  
Air Source Heat Pump ◽  
Heating Capacity ◽  
Environment Temperature

In order to improve the performance of air source heat pump in low temperature conditions, designed a solar assisted air source heat pump with the gas-liquid bio-sources heat exchanger. The heat pump can work with solar heat water and air as a heat source at same time. The heating performance of the heat pump in low temperature conditions was tested. The results show that, in comparison to the single air source heat pump, the heating performance of the solar assisted air source heat pump is improved remarkably. When the solar water flow is at 0.6m3/h and the outdoor environment temperature is -7°C, the heating capacity raised about 38% and the COP raised about 30%. When the outdoor environment temperature is -15°C, the heating capacity and the COP all raised more than 50%.

Experimental study of a control strategy for a cascade air source heat pump water heater

2017 ◽  
Vol 110 ◽  
pp. 835-843 ◽  
Author(s):  
Minglu Qu ◽  
Yanan Fan ◽  
Jianbo Chen ◽  
Tianrui Li ◽  
Zhao Li ◽  
...  
Keyword(s):  
Experimental Study ◽  
Heat Pump ◽  
Control Strategy ◽  
Water Heater ◽  
Air Source Heat Pump ◽  
Heat Pump Water Heater

An experimental study on achieving even-frosting for an air source heat pump using a novel dual-fan outdoor coil

2021 ◽  
pp. 111695
Author(s):  
Xiaoxia Bai ◽  
Shengnan Liu ◽  
Shiming Deng ◽  
Long Zhang ◽  
Minchen Wei
Keyword(s):  
Experimental Study ◽  
Heat Pump ◽  
Air Source Heat Pump

Control strategy and experimental study on a novel defrosting method for air-source heat pump

2010 ◽  
Vol 30 (8-9) ◽  
pp. 892-899 ◽  
Author(s):  
Cai-Hua Liang ◽  
Xiao-Song Zhang ◽  
Xiu-Wei Li ◽  
Zhen-Qian Chen
Keyword(s):  
Experimental Study ◽  
Heat Pump ◽  
Control Strategy ◽  
Air Source Heat Pump
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