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Design and operation of an air-conditioning system fueled by wood pellets

Author

Listed:
  • Kai, Takami
  • Uemura, Yoshimitsu
  • Teraoka, Yukio
  • Takahashi, Takeshige
  • Hatate, Yasuo
  • Yoshida, Masahiro

Abstract

A room-cooling system of 2kW 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 36.9m3 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.

Suggested Citation

  • Kai, Takami & Uemura, Yoshimitsu & Teraoka, Yukio & Takahashi, Takeshige & Hatate, Yasuo & Yoshida, Masahiro, 2008. "Design and operation of an air-conditioning system fueled by wood pellets," Renewable Energy, Elsevier, vol. 33(4), pages 720-725.
    • Handle: RePEc:eee:renene:v:33:y:2008:i:4:p:720-725
    DOI: 10.1016/j.renene.2007.03.011
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    References listed on IDEAS

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    1. Srikhirin, Pongsid & Aphornratana, Satha & Chungpaibulpatana, Supachart, 2001. "A review of absorption refrigeration technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 5(4), pages 343-372, December.
    2. Garimella, Srinivas, 2003. "Innovations in energy efficient and environmentally friendly space-conditioning systems," Energy, Elsevier, vol. 28(15), pages 1593-1614.
    3. Fiedler, Frank, 2004. "The state of the art of small-scale pellet-based heating systems and relevant regulations in Sweden, Austria and Germany," Renewable and Sustainable Energy Reviews, Elsevier, vol. 8(3), pages 201-221, June.
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    1. Maraver, Daniel & Sin, Ana & Royo, Javier & Sebastián, Fernando, 2013. "Assessment of CCHP systems based on biomass combustion for small-scale applications through a review of the technology and analysis of energy efficiency parameters," Applied Energy, Elsevier, vol. 102(C), pages 1303-1313.

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