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%.

scholarly journals Heat pump air conditioning system for pure electric vehicle at ultra-low temperature

2014 ◽  
Vol 18 (5) ◽  
pp. 1667-1672 ◽  
Author(s):  
Hai-Jun Li ◽  
Guang-Hui Zhou ◽  
An-Gui Li ◽  
Xu-Ge Li ◽  
Ya-Nan Li ◽  
...  
Keyword(s):  
Low Temperature ◽  
Electric Vehicle ◽  
Heat Pump ◽  
Air Conditioning ◽  
Heating System ◽  
Experimental Results ◽  
Air Conditioning System ◽  
Discharge Temperature ◽  
Heating Capacity ◽  
Environment Temperature

When the ordinary heat pump air conditioning system of a pure electric vehicle runs at ultra-low temperature, the discharge temperature of compressor will be too high and the heating capacity of the system will decay seriously, it will lead to inactivity of the heating system. In order to solve this problem, a modification is put forward, and an experiment is also designed. The experimental results show that in the same conditions, this new heating system increases more than 20% of the heating capacity; when the outside environment temperature is negative 20 degrees, the discharge temperature of compressor is below 60 degrees.

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.

scholarly journals Experimental Study on Heating Performance of Air - source Heat Pump with Water Tank for Thermal Energy Storage

2017 ◽  
Vol 205 ◽  
pp. 2055-2062 ◽  
Author(s):  
Xinhui Zhao ◽  
Enshen Long ◽  
Yin Zhang ◽  
Qinjian Liu ◽  
Zhenghao Jin ◽  
...  
Keyword(s):  
Experimental Study ◽  
Energy Storage ◽  
Heat Pump ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Water Tank ◽  
Heating Performance ◽  
Air Source Heat Pump

Experimental Study on Heating Performance Characteristics of Air Source Heat Pump with Air to Water Type

2011 ◽  
Vol 23 (6) ◽  
pp. 400-405 ◽  
Author(s):  
Kwon-Jae Lee ◽  
Young-Chul Kwon ◽  
Chong-Keun Chun ◽  
Sam-Jin Park ◽  
Jeong-Tae Kwon ◽  
...  
Keyword(s):  
Experimental Study ◽  
Heat Pump ◽  
Performance Characteristics ◽  
Water Type ◽  
Heating Performance ◽  
Air Source Heat Pump

scholarly journals Energy Saving Potential of Radiant Floor Heating Assisted by an Air Source Heat Pump in Residential Buildings

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1321
Author(s):  
Yu-Jin Hwang ◽  
Jae-Weon Jeong
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Residential Buildings ◽  
Heating Systems ◽  
Air Source Heat Pump ◽  
Heating Capacity ◽  
Heating Loads ◽  
Radiant Floor Heating ◽  
Floor Heating ◽  
Floor Temperature

The objective of this research is to establish an appropriate operating strategy for a radiant floor heating system that additionally has an air source heat pump for providing convective air heating separately, leading to heating energy saving and thermal comfort in residential buildings. To determine the appropriate optimal operating ratio of each system taking charge of combined heating systems, the energy consumption of the entire system was drawn, and the adaptive floor surface temperature was reviewed based on international standards and literature on thermal comfort. For processing heating loads with radiant floor heating and air source heating systems, the heating capacity of radiant floor heating by 1 °C variation in floor temperature was calculated, and the remaining heating load was handled by the heating capacity of the convective air heating heat pump. Consequently, when the floor temperature was 25 °C, all heating loads were removed by radiant floor heating only. When handling all heating loads with the heat pump, 59.2% less energy was used compared with radiant floor heating only. Considering the local discomfort of the soles of the feet, the floor temperature is expected to be suitable at 22–23 °C, and 31.5–37.6% energy saving compared with those of radiant floor heating alone were confirmed.

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

Performance Research of Air-Cooled Heat Pump for Small Residential

2012 ◽  
Vol 516-517 ◽  
pp. 1180-1183
Author(s):  
Hui Fan Zheng ◽  
Chun Li Yang ◽  
Yan Hua Li ◽  
Yao Hua Liang
Keyword(s):  
Experimental Data ◽  
Heat Pump ◽  
Cooling Water ◽  
Cooling Capacity ◽  
Least Square ◽  
Outdoor Environment ◽  
Experimental Setup ◽  
Outlet Temperature ◽  
Pump System ◽  
Environment Temperature

An experimental setup is designed and built to study the operation characteristics of the air-cooled heat pump system for small residential in this paper. Based on the experimental setup, the characteristics of the energy efficiency ratio(EER) and cooling capacity have been researched when the outlet temperature of cooling water and outdoor environment temperature change. The experimental data demonstrate that the cooling capacity and EER of the system increases with increasing outlet cooling water temperatures and decreases with increasing outdoor environment temperatures. In addition, the correlation of the system EER is calculated by using the least square method based on the experimental data.

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