COMBINED HEATING AND HOT WATER SUPPLY SYSTEM WITH DEEP WASTE DISPOSAL OF BOILER COMBUSTION PRODUCTS AND METHOD FOR OPERATION THEREOF Russian patent published in 2018 - IPC F24D17/00 F24H8/00 

FIELD: heat supply.

SUBSTANCE: invention relates to the field of heat supply, namely to heating and hot water supply systems. Combined system of heating and hot water supply with a deep utilization of the heat of the combustion products of the boiler contains: fuel boiler; connected to it hot water boiler connected to the DHW system; condensing heat exchanger located in the flue behind the boiler or in its tail part with the possibility of bypassing a part of the hot combustion products; pipelines for direct and reverse network water and hot water supply systems, in order to increase thermal efficiency and reduce harmful emissions due to stable and complete deep utilization of the heat of the combustion products of the boiler, the input of the condensing heat exchanger is connected to the initial cold water of the DHW, and the pipeline at the outlet of the heat exchanger is equipped with an automatic three-way valve connected to the hot water consumer and to the boiler. In addition, the boiler's heat output is regulated with priority for heating, i.e. first of all cover the heating load, while maintaining the water flow to the condensing heat exchanger – according to the actual DHW demand, the water heating temperature is not regulated, but its upper limit is limited to 60–65 °C.

EFFECT: increased thermal efficiency and reduced harmful emissions due to stable and complete deep utilization of heat of combustion products.

3 cl, 6 dwg