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An experimental study on a novel radiant-convective heating system based on air source heat pump
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik. (Building Energy Efficiency)
Vise andre og tillknytning
2018 (engelsk)Inngår i: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 158, s. 812-821Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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 degrees C, 32.1 degrees 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 degrees C, and their respective rising rates were 0.41 degrees C, 0.28 degrees 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.

sted, utgiver, år, opplag, sider
2018. Vol. 158, s. 812-821
Emneord [en]
Experimental study, Radiant heating, Convective heating, Air source heat pump
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-141055DOI: 10.1016/j.enbuild.2017.10.065ISI: 000423636600069OAI: oai:DiVA.org:umu-141055DiVA, id: diva2:1151598
Tilgjengelig fra: 2017-10-23 Laget: 2017-10-23 Sist oppdatert: 2018-06-09bibliografisk kontrollert

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