Design and operation of an air-conditioning system fueled by wood pellets |
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| Authors: | Takami Kai Yoshimitsu Uemura Yukio Teraoka Takeshige Takahashi Yasuo Hatate Masahiro Yoshida |
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| Affiliation: | aDepartment of Applied Chemical and Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan;bDepartment of Environmental Sciences and Technology, Faculty of Agriculture, Kagoshima, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan |
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| Abstract: | A room-cooling system of 2 kW capacity fueled by wood pellets was designed, built and tested. The system was demonstrated during summer at the Yakushima Field Station of Kagoshima University, Japan. It contained a pellet feeder, a pellet burner, a heat exchanger, a lithium bromide–water absorption heat pump and a control unit. The volume of the test room was 36.9 m3 and ambient temperature 30 °C. The airflow temperature from the room unit was decreased to 16 °C by the system, and the room temperature could be successfully controlled to 24 °C steady state. Room heating in winter was also demonstrated. Since the air was heat exchanged, the overall energy efficiency of the cooling system was low at about 19%. However, the calculation based on the heat flow showed that the efficiency could be enhanced to about 75% by direct heating of the regenerator by the flue gas. |
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| Keywords: | Wood pellets Space cooling Wood chips Absorption heat pump |
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