| 摘要 |
This invention relates to a solar still wherein the evaporation takes place in partially evacuated tubings which are heated by sunlight. The water to be distilled is supplied from a reservoir vessel which is sealed off after batch loading. The reservoir vessel is elevated above the solar collector. The water is fed into the heater tubings routed through the solar collector by gravity, through an orifice and a heat exchanger-condenser. The steam tubing branches off from the heater tubing in the solar collector vertically, and is routed through the heat exchanger-condenser. At this end, it is connected to a vertical tubing of a sizable length that empties into the distilled water reservoir. The exit end of the heater tubing routed through the solar collector is connected to another vertical tubing of a sizable length that empties into an overflow tank.
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