System and method for centralised heat supply

Abstract

The inventive centralised heat supply system comprises a boiler (1), in the gas flue of which a steam heater (2) connected to networking preheaters (12, 13) is accommodated, a circuit of supplied and return heating water, a heating system circuit having three heat transfer stages (14, 15, 16) and a heat pumping unit (17) which is connected to the last heat transfer stage (16) of the heating system circuit and to the circuit of return cooled heating water, which circuit is provided with a well (18) for storing the excess cooled heating water in the ground. A network economizer (6) for heating the cooled heating water is placed in the gas flue of the boiler (1). The circuit of the supplied heating water is provided with a heat-insulated reservoir (19) for storing the heat delivery water during the non-heating period. The invention makes it possible to raise the degree of fuel energy utilization for heating a heat carrier by means of comprehensive technology for the use of exhaust gas heat, to increase the level of heat transfer to a consumer, to accumulate and store a low-temperature heat carrier, to accumulate and store a high-temperature heat carrier during the non-heating period and to eliminate the seasonal repeatability of the use thereof.

Description

technical field [0001] The present invention relates to thermal engineering and in particular to district heating systems and methods using heat pump units. Background technique [0002] A conventional central heating system has a thermal power plant comprising a main steam energy circuit, a cooling water circuit, a main delivery water circuit with heating means for hot tap water and heating systems, and a The thermodynamic system circuit of the heat pump unit at the supply point, which is connected to the evaporator inlet / outlet by the delivery return circuit of the main circuit and the condenser inlet / outlet by the thermodynamic system return circuit (patent RU 2095581, published in November 1997 10). The disadvantage of the above system is that the utilization efficiency of the fuel energy for heating the heat carrier is low, and the heat energy of the exhaust gas is not fully utilized, so the temperature of the cooled return water supplied to and discharged from the tur...

AI Technical Summary

Problems solved by technology

The disadvantages of the above-mentioned systems and methods are the low utilization efficiency of the fuel energy for heating the heat carrier, the insufficient heat energy of the exhaust gas, the emission of pollutants, and the low level of heat transferred to the user, the lack of accumulative storage facilities for the heat carrier, and seasonal recurring consumption

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