Two-pipe heat pump system with isolated tank coil for domestic hot water
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United States of America Patent
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Jun 30, 1998
Issued Date -
N/A
app pub date -
Sep 20, 1996
filing date -
Nov 10, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An engine-driven heat pump system is disclosed in which the waste heat from the engine is used to only heat the water contained in a water heater. Space heating may be then provided by circulating the water through an air-handling unit. In order to simplify the operation, the engine's coolant is circulated through a tube surrounding the heater's storage tank. Any risk of contamination to the potable water supply is removed by venting the region surrounding the coolant-to-water heat exchanger. This is achieved by assuring that a surrounding insulation layer does not form a seal over the heat exchanger and by using a non-setting thermally conductive paste between the tube and tank.
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