著者

東山 禎夫 向瀬 慎一 浅野 和俊

出版者

Japan Society for Snow Engineering

雑誌

日本雪工学会誌 (ISSN:09133526)

巻号頁・発行日

vol.14, no.1, pp.16-25, 1998-01-01 (Released:2009-05-29)

参考文献数

9

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A removal method of snow accumulated on a photovoltaic (PV) array installed at a pantiled roof was examined using a model house in 1994/1995 winter season. The photovoltaic array with a rate of 1kW consists of ten PV panels and each panel was individually heated by injecting do current from a dc power supply. The roof surface around the array was covered with the electrically-heated roof tiles. When snow slides down from the panels and the temperature at the under surface of the panel rises to 3 degrees, the heating circuit automatically turns off and the system for generating electric power turns on. Snow on the photovoltaic array and the pantiled roof usually slides down within 3 to 4 hours after heating. The snow sliding system works effectively in assistance of sunshine. After snow sliding, the photovoltaic array can generate electricity in a sunny day, although the gained energy is less than whole energy to snow removal. Since the generated power is considerably reduced owing to the existence of a little snow lump on the array, snow should be removed clearly.