In most conditions, the excess heat of exhaust water discharged from household or publicbathing-rooms is mostly not utilized, which causes a lot heat loss for its higher temperature. For thisreason, it is suggested that a heat pump that uses the exhaust water as a low-temperature heat sourceshould be used to reclaim its excess heat to produce sanitary hot water for the public bathing-rooms. Inthis way, we call the above-mentioned heat pump as bathing room heat pump water heater.
Since 1970s, kinds of condensing boilers (CB) have been widely applied in HVAC engineering, theirexit flue gas temperature is very lower, even down to about 40?-45?, and their thermal efficiency isvery higher, even up to about 107%~109%, based on low heat value. The application of CBs in HVACsystem or hot water supply system can increase thermal efficiency and reduce the consumption of fuel,because of the utilization of latent heat of vapour in the exit flue gas.
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