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Experimental study and thermo-economic analysis of a novel radiant-convective cooling system

Jiang, T; You, S; Zhang, H; Wei, S; Liu, H; Wang, Y; (2021) Experimental study and thermo-economic analysis of a novel radiant-convective cooling system. International Journal of Refrigeration , 131 pp. 505-514. 10.1016/j.ijrefrig.2021.06.013. Green open access

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Abstract

Split air-conditioners have limitations in terms of energy efficiency and local comfortability. Radiant cooling systems (RCSs) cannot be used in most residential buildings, due to its lack of space for a central plant room to achieve secondary heat exchange. To overcome these defects, a novel radiant-convective cooling system with the refrigerant-cooling radiant terminal (RCRT) was proposed, which took the advantages of both split air-conditioners and RCSs. Experiments were conducted in a climate chamber to investigate the thermal comfort performance, energy efficiency ratio and economic performance of the proposed system, in comparison with split air-conditioners. The results indicated that the RCRT cooling system could improve the indoor set temperature from 26°C to 28°C, under the same indoor thermal comfort as split air-conditioners. Additionally, the proposed system had higher energy efficiency ratio than split air-conditioners, and the energy saving potential of this system was 8.4%. The initial cost of the RCRT cooling system was higher than split air-conditioners, however, its life cycle cost was lower. The payback period of using the proposed system to replace split air-conditioners was 2.4 years, indicating that adopting the RCRT cooling system was more economical.

Type: Article
Title: Experimental study and thermo-economic analysis of a novel radiant-convective cooling system
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ijrefrig.2021.06.013
Publisher version: https://doi.org/10.1016/j.ijrefrig.2021.06.013
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
Keywords: refrigerant-cooling radiant terminal; thermal comfort performance; energy efficiency ratio; economic performance
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
URI: https://discovery.ucl.ac.uk/id/eprint/10130077
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