| 摘要 |
A solar water heating system employs at least one solar heat collector having an upper manifold, a lower manifold, and at least one fluid passage between the upper and lower manifold. The upper and lower manifolds each are inclined, so that air within the manifolds travels to the manifolds upper ends. A liquid reservoir, located above the collector, has an outlet at a bottom portion and a supply inlet at an upper portion. A float valve within the liquid reservoir maintains a constant hydrostatic head pressure at the reservoir output. An air vent is connected between the collector and the liquid reservoir so that air bubbles within the collector vent to the liquid reservoir. A metering valve varies the flow rate of liquid from the solar heat collector, thereby varying dwell time of liquid within the collector. The system may be evacuated entirely to a benchmark water level.
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