太陽能光熱資料匯總(英文版)-wenkub.com
2025-02-11 12:16 本頁面
【正文】 ll need to heat the water further with a boiler or immersion heater during the winter months. ? Cut your bills: sunlight is free, so once you39。ve paid for the initial installation your hot water costs will be reduced. ? Cut your carbon footprint: solar hot water is a green, renewable heating system and can reduce your carbon dioxide emissions In general, solar water heating systems falls into 2 types: Active and Passive . Common Types of Solar Water Heating Systems An active system uses an electric pump to circulate water or heat transfer fluid from storage tanks through the collector. Whereas a passive system relies on gravity and the tendency for water to naturally circulate as it is heated, allowing water or heat transfer fluid to move through the system without the use of a circulating pump. Active solar water heating systems: Active solar water heating systems are characterized as either direct (also called “open loop”) or indirect (also called closed loop) depending on whether the ining water is heated directly in the collectors or indirectly heated via a heat exchanger. ? Automatic solar controller ? Temperature sensor on collector ? Temperature sensor on storage tank ? Solar circulation pump ? Cold water inflow ? Hot water runoff ? Temperature sensor for additional heating Elements of a solar heating system for hot water: Direct solar heating system Pumps circulate household water through the collectors and into the home. They work well in climates where it rarely freezes. Active indirect water heater Also known as an active closedloop system, a solar heater that circulates a fluid other than water (such as diluted antifreeze) through a collector. The collected heat is transferred to the household water supply using a heat exchanger. Indirect solar water heaters are popular in climates prone to freezing temperatures. Passive solar water heating systems: ? Integ
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