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U.S. Department of Energy
Office of Scientific and Technical Information

Water preheater system

Patent ·
OSTI ID:5328964
A heat transfer liquid collects heat in a solar collector and transfers the heat to water in a preheater heat exchanger. Use of a negative-pressure collector by means of an ejector and pressure relief valve allows inexpensive and readily available materials to be used in the collector. Preferably, the preheat heat exchanger is a converted gas hot water heater in which the heat transfer liquid is sprayed onto a portion of the storage tank and is collected in a reservoir. The negative-pressure solar collector can also be used to heat swimming pool water.
Assignee:
EDB-85-146940
Patent Number(s):
US 4503839
OSTI ID:
5328964
Country of Publication:
United States
Language:
English