Solar air collectors can be used for heating rooms, drying crops and wood, and heating water. In present studies, first, a flow control system for obtaining a constant temperature at the exit of a flat-plate collector was installed in a hot air supply system and the feasibility of the control system was examined. When the flow temperature was lower than the temperature that was set by a digital indicating controller, the fan power was reduced to decrease the flow rate. When the outlet air temperature was higher than the setting temperature, the flow rate was increased. Consequently, the control system worked well to maintain the exit air temperature. Secondly, an unsteady state analysis was made on thermal performance of the collector. In analysis, flow rate variations over time were given as conditions. Validity of this analysis was checked by experimentation. Analytical results agreed well even when solar radiation intensity, wind speed, or flow rate changed abruptly.
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ASME 2003 International Solar Energy Conference
March 15–18, 2003
Kohala Coast, Hawaii, USA
Conference Sponsors:
- Solar Energy Division
ISBN:
0-7918-3676-2
PROCEEDINGS PAPER
Flow Control and Unsteady State Analysis on Thermal Performance of Solar Air Collectors
Sadasuke Ito,
Sadasuke Ito
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
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Minoru Kashima,
Minoru Kashima
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
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Naokatsu Miura
Naokatsu Miura
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
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Sadasuke Ito
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
Minoru Kashima
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
Naokatsu Miura
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
Paper No:
ISEC2003-44215, pp. 727-731; 5 pages
Published Online:
January 5, 2009
Citation
Ito, S, Kashima, M, & Miura, N. "Flow Control and Unsteady State Analysis on Thermal Performance of Solar Air Collectors." Proceedings of the ASME 2003 International Solar Energy Conference. Solar Energy. Kohala Coast, Hawaii, USA. March 15–18, 2003. pp. 727-731. ASME. https://doi.org/10.1115/ISEC2003-44215
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