High efficiency operation by water temperature and area control in thermal radiative cooling/heating system

Author(s): Hiroaki Ikegami*, Akihiro Satake, Hisafumi Yamada, Yasunori Mitani
Department of Electrical and Electronic Engineering, Kyushu Institute of Technology, Kitakyushu-shi, Fukuoka, 804-8550, Japan
International Journal of Smart Grid and Clean Energy, vol. 3, no. 4, October 2014: pp. 437-440
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.3.4.

AbstractIn recent years, energy conservation measure in the demand side has been promoted for energy problems. Among these the cooling/heating system accounts for about a quarter of the energy consumption in the home of Japan, the energy conservation measures of the cooling/heating system are particularly important. Research on energy savings and performance evaluation in thermal radiative cooling/heating system is carried out. In this paper, this system is verified about the method of heating operation with high energy efficiency. As a method, heat discharge is controlled by operating water temperature and passing water area of radiator which is emulated by the forced heat exchange with a fan in heating operation. As a result, lowering water temperature and increasing passing water area gets high energy efficiency with getting the same heat discharge.

KeywordsThermal radiative cooling/heating system, heat pump, energy saving, radiant heat transfer

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