Experimental research of heating characteristics on an air source heat pump system with capillary direct floor radiant

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-02-01 DOI:10.1016/j.ijrefrig.2024.11.031

Jianhui Niu , Haichao Wang , Tianshu Lv , Shuxue Xu

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引用次数: 0

Abstract

A new-type air source heat pump system with capillary direct floor radiant (ASHPCFR) was proposed, in which the vapor refrigerant condensed directly in the capillary under the floor to heat the room. Theoretical calculation of heat transfer in the capillary floor was conducted. The results indicated that the optimal capillary spacing should be 100 mm and it was best for a thickness smaller than 60 mm with the floor cement layer. An experimental apparatus for the ASHPCFR system was developed, and its low-temperature heating process and normal heating process were experimentally investigated. Experimental results showed that when the outdoor temperature was -5 °C, the indoor air temperature reached 20 °C after 120 min of running, while the temperature difference of a 20 mm thick cement floor could reach 1.73 °C and its maximum temperature could reach 27.5 °C. When the outdoor temperature was -10 °C, the system heating COP was stable at 3.06.

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来源期刊

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.