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Old 08-18-13, 03:23 PM   #2
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I'm very curious about a similar solar heat system: the vacuum tube systems are supposed to be very efficient (up to ~80% maybe?) and if the storage tank was warm enough, it could be used as a hot water heating system for a house. Or, there could be a heat pump to boost the temperature, and use the tank as heat storage for overnight and cloudy days. Domestic hot water could be either directly off the solar heat tubes or also use the heat pump.

Has anybody run the numbers on this?
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