Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/74674
Title: An experimental study on a novel radiant-convective heating system based on air source heat pump
Authors: Dong, J
Zhang, L 
Deng, S 
Yang, B
Huang, S
Keywords: Air source heat pump
Convective heating
Experimental study
Radiant heating
Issue Date: 2018
Publisher: Elsevier
Source: Energy and buildings, 2018, v. 158, p. 812-821 How to cite?
Journal: Energy and buildings 
Abstract: Air source heat pump (ASHP) has been widely applied to many parts of the world due to its simple structure and low initial cost. To save energy consumed for spacing heating and enhance the indoor thermal environment, improving the performances of ASHP has become one of the research focus in the relevant field. Currently, the most conventional heating terminal of ASHP system for spacing heating is finned tube heat exchanger coupled with air fan, which may cause strong draught sensation and dry eye problem and make users feel uncomfortable during convective heating. On the other hand, radiant heating is attracting more and more attention due to its comfortable indoor thermal environment. In this paper, a novel radiant-convective heating terminal was presented and coupled into an ASHP system. Both the operating characteristics and heating performances of the novel system were experimentally investigated. The experimental results showed that the novel system took about 28 min to enter a steady operating stage, during which the radiant panel surface temperature and outlet air temperature for the novel heating terminal, and COP of the novel system were 40.9 °C, 32.1 °C, and 3.11, respectively, under a standard heating condition. In addition, all parameters mentioned above saw a linear increase when the outdoor air temperature increased from −4.0 to 10.0 °C, and their respective rising rates were 0.41 °C, 0.28 °C and 0.04 per increased outdoor air temperature. Furthermore, the experimental results also demonstrated that adjusting the indoor air flow rate could effectively allocate the amount of heat generated by different heat transfer modes, which may have significant effects on the indoor thermal environment.
URI: http://hdl.handle.net/10397/74674
ISSN: 0378-7788
EISSN: 1872-6178
DOI: 10.1016/j.enbuild.2017.10.065
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