SU1523851A1 - Heating station of open-type heat supply system - Google Patents

Abstract

The invention relates to the hot water supply of buildings. The aim of the invention is to increase the efficiency of the heat point by reducing the consumption of hot and network water. The heat point is equipped with a heat pump 14, in which the evaporator 15 is heated by the heating coolant after the lower stage of the hot water supply, and the condenser 16 is placed between the mixer 11 and the heat exchanger 9 of the upper stage. In addition, the heat point contains a valve 17 regulating the flow of coolant into the mixer 11. 1 sludge.

Description

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The invention relates to the hot water supply of residential, public and industrial buildings and can be used in central and individual heat points of open centralized heat supply systems for consumers with mixed heat loading connected to heat networks both in dependent and independent schemes.

The aim of the invention is to increase the economy by reducing the consumption of hot and network water.

Fla drawing shows a schematic diagram of the heat point of an open heat supply system.

The heat point contains supply and return pipelines 1 and 2 of the heating network, line 3 of cold water with a lower stage heat exchanger 4 installed on it, connected by pipes 5 and 6 to the inlet and outlet of the heating coolant with a return pipe 2 of the heating network, tank battery 7, connected with the cold water line 3 before and after the heat exchanger 4 lower stages, the pump 8 for charging it, the heat exchanger

9 upper stages connected to the supply pipe of the heating network 1 and installed on the main g1I

10 hot water, a water mixer 11 after the heat exchanger of the lower stage and reverse water, installed on the hot water line 10 and connected by pipelines 12 and-13 with a storage tank 7 and a return pipe 2 of the heat network, heat pump 14, the evaporator 15 of which installed on the pipeline 6 for the output of the heating coolant from the heat exchanger 4 of the lower stage, and the condenser 16 nl of the hot water line 10 between the mixer 11 and the heat exchanger 9 of the upper stage, and the control valve 17 installed on the pipe 13 connecting the mixer s 11 2 return pipe heat network.

The operation of the substation is carried out as follows.

The network water from the CHP comes to the heat point via pipeline 1, and returns from the local heat-consuming installations through the return pipe-line 2 of the heating network.

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When the total water in the hot and cold water systems is not mixed with the middle hour pump, the cold water with temperature t (in summer it rises to 20-25 ° C) from the cold water main 3 is supplied to the heat exchanger 4 and heated in it the heat of water of the pipeline 2. Partially water enters through the pipeline 12 into the mixer 11 and into the tank accumulator 7 (in this case, it is charged under the action of the pump 8). In the mixer 11, the water shifts with the network water from the pipeline 2, which enters through the pipeline 13. The mixture enters the hot water line 10 to heat the heat exchanger 9 and from there to the hot water consumer. The temperature of cold water in line 3 is constantly maintained at a temperature not lower than the dew point temperature tp of the air in heated rooms where cold water pipelines are laid (for most cases it is 12-18 ° C), which eliminates condensation on the surface of cold pipes. water, their corrosion, moistening of building structures in the places where pipes pass, and the need for heat and cooling of cold water pipes. In addition, reheating the water in the cold water main 3 leads to a decrease in hot water consumption at the mixing taps of the hot water supply system, and consequently, it reduces the heat and heat carrier flow from the heat supply pipe 1 to the heating network. but everyday goals.

The heat pump 14 takes the heat of the return network water in the pipe 6 behind the heat exchanger 4 by means of the evaporator 15 and transfers this heat of heated VO | G through the condenser 16 (e), which further reduces the heat consumption from the heating network and reduces the surface of the heat exchanger of the upper stage 9.

At maximum drainage, the water flow in the hot and cold water system comes from the storage tank 7 (during this period it is discharged).

When the outdoor air temperature is close to the break point of the temperature plot in the heat network, water from heat exchanger A with a temperature of 30-35 C below the calculated water temperature for hot water supply enters the battery in charge. It is reheated in heat exchanger 9. At the same time, the water supply to the mixer 11 from the pipeline 13 at this outdoor temperature range is controlled by the valve 17, which additionally reduces the temperature of the water in the pipe 1 after the heat exchanger 9 going to the heating system and reduces the losses reheatings due to the approach of the graph of the network water temperature in the pipeline 1 to the graph of the quality control of the heating load.

This scheme of a heat supply station makes it possible to increase the efficiency of the entire complex of centralized heat and water supply systems of a consumer. At the same time, the consumption of heat and heat carrier from the supply pipe of the heating network is reduced by A5-50%, the consumption of hot water from water-filling taps is reduced by 25-30%, the total capacity of hot water supply systems decreases by 15-20%, and the surface of heat exchangers decreases by 18-20 hot water supply, the temperature of the return mains water decreases, the condensate on the surface of drinking water pipes and the need for their thermal insulation are eliminated, the building structures are not wetted from the condensate of cold water pipes, loemkost teshyuvEzGh networks and systems, hot water supply are reduced .ekspluatatsionnye costs, electricity consumption by

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reheating of cold water for cooking-b1.1 current targets, heating costs increase) - for electric power generation for the electric power-supply line and fuel consumption at the emorgo-system is reduced,

Claims (1)

Invention Formula Thermal point of the open heat supply system, containing supply and return pipelines of the heating network, cold water main with a lower stage heat exchanger installed on it, connected by the input and output pipelines of the heating coolant to the return heat network pipe, a tank battery connected to the COLD WATER water pipe to AND after the heat exchanger of the lower stage, the pump for its charging, the heat exchanger of the upper stage, connected to the flow pipe of the heat network and installed on the main line whose water, the water mixer after the lower stage heat exchanger and the return water, installed on the hot water main and connected by pipelines to the bacogamy-accumulator and the return pipe of the heating network, characterized in that in order to increase the environmental efficiency by reducing whose and network water, heat point additionally contains a heat pump, the evaporator of which is installed on the heating coolant outlet pipe from the lower stage heat exchanger, and the condenser - on the hot water main between the mixer and an upper stage heat exchanger, and a control valve installed in the pipeline connecting the mixer to the return network of the heat network.