7-5-3 簡易太陽熱利用技術の開発と評価(7-5 リサイクル4,Session7 環境対策・リサイクル,研究発表)

概要

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Solar energy equipment such as photovoltaic power generation and solar thermal power generation are attractive counter major option for the global warming with the fossil fuel use. Solar water heater is a simple solar energy using equipment for hot water supply. Once the annual sale of solar water heater was more than 800,000/year in 1970's in Japan. Those were depressed to 30,000/year after 1980's with cheap and stable supply of crude oil. If energy source for hot water supply was turned into gas, it would be saved about 30,000 yen/year, assuming a solar heat water heater price as between 150,000 yen and 200,000 yen. Cost pay back of solar water heater equipment investment is possible within relatively short period. If the solar water heat equipment might be the much cheaper by making simple solar water heater, the amount of cost-cut would be also much larger.
2011-08-09