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Structure for controlling temperature of hot- water supply from waste heat recovery system using three-way valve or mixing valve, and structure for controlling temperature of hot- water supply from waste heat recovery system using heat exchanger in hot- water tank
Structure for controlling temperature of hot- water supply from waste heat recovery system using three-way valve or mixing valve, and structure for controlling temperature of hot- water supply from waste heat recovery system using heat exchanger in hot- water tank
The present invention provides a structure for controlling the temperature of hot- water supply from a waste heat recovery system using a three-way valve, comprising: a hot- water tank for storing hot water, the heat of which has been exchanged by a waste heat heat exchanger, the hot- water tank comprising the waste heat heat exchanger for recovering waste heat from a waste heat source and generating hot water, a heating heat exchanger for exchanging heat so as to provide heating using the hot water, and a temperature sensor for checking the temperature of the hot water; a boiler for heating the hot water, the heat of which has been exchanged by the hot- water tank, until the set temperature for heating and hot water supply set by a user is reached, and for supplying same to the spaces to be heated and supplied with hot water; a three-way valve which is disposed on a hot water line entering the boiler from the hot- water tank and can selectively supply, to the boiler, the hot water flowing in from the hot- water tank or water fed directly from a water main; and a control unit for controlling the three-way valve so as to cut off the hot water flowing in from the hot- water tank by using the temperature sensor in case the temperature of the hot- water tank is 0℃ to 10℃ lower compared with than the set temperature for hot- water supply of the boiler and to supply the water fed directly from a water main to the boiler.
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