Integral-type solar-assisted heat pump water heater

Huang, Bin‐Juine; Chyng, J.P.

doi:10.1016/s0960-1481(98)00264-x

Cited by 46 publications

(13 citation statements)

References 3 publications

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“…The averaged COP value was about 6.5 during the test. According to Huang and Chyng's test result, the COP of the solar assisted heat pump is about 3.5 with the averaged hot water temperature 30°C [20]. This demonstrates the PV-SAHP has a superior thermal performance.…”

Section: Solar Radiation and Ambient Temperaturementioning

confidence: 95%

Performance analysis of a photovoltaic heat pump

et al. 2008

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Section: Solar Radiation and Ambient Temperaturementioning

confidence: 95%

Performance analysis of a photovoltaic heat pump

et al. 2008

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“…Huang BJ firstly put forward to the concept of the combined solar heat pump hot water system in 1999 [6] . The greatest feature of the system is that the solar energy and the air energy could be used as the heat source of the heat pump system.…”

Section: The Combined Solar-air Dual-source Heat Pump Systemmentioning

confidence: 99%

The Domestic Research Status of the Solar-Air Dual-Source Heat Pump

Zhang

Zhao

Zhou

et al. 2010

2010 International Conference on Intelligent System Design and Engineering Application

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The solar-air dual-source heat pump technology is based on the application of solar energy and air energy as the heat source of the heat pump system. It is a comprehensive utilization of the solar energy and the air energy , and it can be a good solution to the low efficiency, the non-stability and the poor reliability of the air-source heat pump in winter. In the paper, the development of different types solar-air dual-source heat pump system in China have been discussed, and the characteristics of the different heat pump systems have been analyzed. Based on the analysis results, a new solar-air dual-source compound heat pump system has been constructed. Keywords-solar-air, dual source heat pump, research status I. INTRODUCEAir is a clean, safe, inexhaustible natural energy.Because of the less energy consumption, the limiting contribution to the environment problems and other good performance of the air source heat pump, it has been generally received lots of attentions. Although the simple structure and the convenient installation of the air source heat pump, the application has been limited by the ambient temperature. Its heating capacity and the heating performance coefficient will greatly decrease as the ambient temperature decreases, and the cooling and the heating capacity are difficult to be suitable to the building load.Moreover, it has the outdoor frost problems in winter, so it is not suitable to the cold regions.As is well known, the solar energy is the source of all energy on the earth. Like air, it is a safe, inexhaustible natural resource. If the solar energy and the air energy are used as the heat source of the heat pump system at the same time, the performance and the reliability of the air source heat pump will be greatly improved. The solar-air dual-source heat pump system has achieved the composite application of the solar energy and the air energy, and it can meet the requirements both of the space heating or cooling and the domestic hot water. The relative research about the solar-air dual-source heat pump technology have been carried out in lots of universities, such as Southeast University, Nanjing University of Science and Technology, Qingdao Technological University, Zhongyuan University of Technology and so on. II. THE ALTERNATIVE SOLAR-AIR DUAL-SOURCE HEAT PUMP SYSTEM Figure 1. The alternative operating mode of the solar-air dual-source heat pump system The solar-air dual-source heat pump system with the alternative operating mode comprises of a water evaporator and an air evaporator, as shown in Figure 1. The heat source of the heat pump system may be provided with the ambient storage water tank pump water evaporator compressor condensor power user expansion valve air evaporator solar energy collector triple valve

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“…Glazed and unglazed flat plate solar collectors are two major collector types mostly used in SAHP systems [15]. When the temperature of the collector system is higher than the ambient temperature, the use of glazed solar collector will reduce heat loss [16], while, when the temperature of the collector is lower than the ambient temperature, the use of unglazed solar collector produces high heat efficiency [17].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of a Novel Direct-Expansion Variable Frequency Finned Solar/Air-Assisted Heat Pump Water Heater

Qin

Huang

et al. 2018

International Journal of Photoenergy

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A novel direct expansion variable frequency finned solar/air-assisted heat pump water heater was fabricated and tested in the enthalpy difference lab with a solar simulator. A solar/air source evaporator-collector with an automatic lifting glass cover plate was installed on the system. The system could be operated in three modes, namely, air, solar, and dual modes. The effects of the ambient temperature, solar irradiation, compressor frequency, and operating mode on the performance of this system were studied in this paper. The experimental results show that the ambient temperature, solar irradiation, and operating mode almost have no effect on the energy consumption of the compressor. When the ambient temperature and the solar irradiation were increased, the COP was found to increase with decreasing heating time. Also, when the compressor frequency was increased, an increase in the energy consumption of the compressor and the heat gain of the evaporator were noted with a decrease in the heating time.

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Integral-type solar-assisted heat pump water heater

Cited by 46 publications

References 3 publications

Performance analysis of a photovoltaic heat pump

Performance analysis of a photovoltaic heat pump

The Domestic Research Status of the Solar-Air Dual-Source Heat Pump

Experimental Study of a Novel Direct-Expansion Variable Frequency Finned Solar/Air-Assisted Heat Pump Water Heater

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