OJFD  Vol.4 No.5 , December 2014
Heat Transfer Characteristics of Work Fluid Including Phase Change Material That Flow into Heating Surface from Narrow Path
ABSTRACT
Use of the low temperature (less than 100°C) energy contributes to effective use of heat resources. The cost recovery by power generation is difficult by using an existing system (the binary cycle or the thermoelectric conversion element), because the initial investment is large. The final purpose of this research is development of the low temperature difference drive engine supposing use in a hot-springs resort as a power source for electric power generation. In order that a traveler may look at and delight a motion of an engine, it is made to drive at low-speed number of rotations. An engine cycle of this study is aimed at the development of Stirling cycle engine which can maintain high efficiency in small size. This kind of engine has simple structure; it brings low cost, and it is easy to perform maintenance. However, it is difficult to obtain enough output by this type of engine, because of its low temperature difference. This paper deals with the heat transfer characteristic that the working fluid including a phase change material flows into the heating surface from the narrow path. In order to increase the amount of the heat transmission, Diethylether is added to the working fluid. Diethylether is selected as a phase change material (PCM) that has the boiling point which exists between the heat source of high temperature and low temperature. The parameters of the experiment are additive amount of PCM, rotational speed of the displacer piston and temperature of heat transfer surface. It is shown that it is possible to make exchange of heat amount increase by adding phase change material. The result of this research shows the optimal condition of the difference in temperature in heat processing, number of revolutions, and addition concentration of PCM.

Cite this paper
Morita, S. , Hayamizu, Y. , Yamada, T. , Horibe, A. , Haruki, N. , Setoguchi, T. and Adachi, K. (2014) Heat Transfer Characteristics of Work Fluid Including Phase Change Material That Flow into Heating Surface from Narrow Path. Open Journal of Fluid Dynamics, 4, 454-462. doi: 10.4236/ojfd.2014.45036.
References
[1]   Ministry of the Environment, Government of Japan (2012) Hot Spring Use Situation Data 2012.

[2]   Osato, K., Muraoka, H. (2008) Hot Spring Binary Cycle Power Generation, the Latest Research and Development of Geothermal Energy. Journal of Japan Institute of Energy, 87, 812-818.

[3]   Ogawa, Y., Watamabe, H., Sakai, M. and Tunou, K. (1994) Analysis of Thermoelectric Power Generation Using Thermoelectric Element. The Transactions of the Institute of Electronics, Information and Communication Engineers, J77-C-2(1), 34-43.

[4]   Shiraki, T., Toda, F., Yamashita, Y., Ohkubo, T. and Kuribara, T. (2010) Development of Exhaust-Heat-Recovering Multiple Cylinder Type Stirling Engine. Proceeding of 13th Stirling Cycle Symposium, 1, 57-58.

[5]   Tahara, T. and Akazawa, T. (2010) Development of 5 kW Class Waste Heat Recovery Stirling Engine: 1st Report, Design and Trial Running of Prototype Engine. Proceeding of 13th Stirling Cycle Symposium, 1, 19-20.

[6]   Haramura, Y. and Nakamura, K. (2010) Heat Transfer Due to Annular Jet Induced by Displacer Motion (the Effects of Annular Channel Position and Cross Sectional Area). Proceeding of 12th Stirling Cycle Symposium, 1, 81-84.

[7]   Japan Society of Thermophysical Properties (2008) Thermophysical Properties Handbook. Yokendo Co. Ltd., Tokyo, 469.

[8]   The Japan Society of Mechanical Engineering (2008) JSME Heat Transfer Handbook, Maruzen Co. Ltd., Tokyo, 35.

[9]   The Japan Society of Mechanical Engineering (2008) JSME Data Book of Heat Transfer. 5th Edition, Maruzen Co. Ltd., Tokyo, 40.

 
 
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