太陽能光熱資料匯總(英文版)(文件)
【正文】 ing system prises solar collectors, a storage tank and interconnecting pipework. The solar collectors are usually mounted on roof of a building to capture solar radiation. Small tubes run through the solar collectors and carry liquid –either water or heat transfer liquid with low boiling point. The heat pipe absorbs heat from the solar collectors and transfers heat to ining water. Benefits of solar water heating ? Hot water throughout the year: the system works all year round, though you39。 in Jinan) of the location on a southfacing roof. It is also necessary to avoid obstructions such as buildings or trees, etc that could prevent solar collectors from solar collectors getting adequate exposure to solar radiation. Types of Solar Collectors: Solar Collectors Flatplate solar collectors Evacuated tube solar collectors Flatplate Solar Collectors Flatplate collectors are the most mon solar collectors for use in solar waterheating systems in homes and in solar space heating. A flatplate collector consists basically of an insulated metal box with a glass or plastic cover (the glazing) and a darkcolored absorbing plate. Solar radiation is absorbed by the absorbing plate and transferred to a fluid that circulates through the collector in tubes. Sketch of flatplate collector Direct flow evacuated tube collectors These consist of a group of glass tubes inside each of which is a flat or curved aluminum fin attached to a metal (usually copper) or glass absorber pipe. The fin is covered with a selective coating that absorbs solar radiation well but inhibits heat loss. The heat transfer fluid is water and circulates through the pipes, one for inlet fluid and the other for outlet fluid Heat pipe evacuated tube Collectors . The Vacuum Solar Tube absorbs the solar energy and transfer into the heat energy, then pass it to the heat pipe, which transfer the heat to the working media. There is no water in th
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