Journal of Applied Science and Engineering

Published by Tamkang University Press


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P. Yeunyongkul  1, P. Sakulchangsatjatai2, N. Kammuang-lue2 and P. Terdtoon2

1Department of Mechanical Engineering, Faculty of Engineering, Rajamangala University of Technology Lanna, Chiang Mai, Thailand, 50300
2Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, Thailand, 50200


Received: May 16, 2012
Accepted: June 6, 2012
Publication Date: June 6, 2012

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The aim of this paper is to experimentally investigates the applying of the closed loop oscillating heat pipe (CLOHP) condenser in vapor compression refrigeration. Split type air conditioner for residence was considered with two disadvantages. Firstly, the large pressure drop was occurred in the condenser because refrigerant flows inside very small copper tube. This pressure drop causes higher compressor power, resulting in decreasing of the Coefficient of Performance (COP). Secondly, a lot of wasted heat losses to surrounding since the refrigerant has to condense after passing through condenser. To recover pressure drop and heat from the condensing process, this research is pursued to use the CLOHP instead of the conventional condenser in split type air conditioner. The refrigerating capacity, refrigerant and working fluid were 12,500 Btu/hr, R22 and R123, respectively. The experimental results were obtained then compared with the conventional one. It can be seen that COP of the conventional condenser was higher than the CLOHP condenser while energy efficiency rating (EER) of the conventional condenser was lower than the CLOHP condenser. In addition, the pressure drop in a refrigerant line of the CLOHP condenser was lower than that of the conventional condenser. Finally, 3 °C increasing of water temperature, which recovers heat from condenser section of CLOHP, was obtained for utilization.

Keywords: Closed Loop Oscillating Heat Pipe, Vapor Compression Refrigeration, Split Type Air Conditioner, Conventional Condenser, CLOHP Condenser


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