RU1815517C - Heat supply system - Google Patents

Abstract

Usage: the heat supply system can be used to carry out program regulation of heat supply for heating and coordinated heat supply for heating and hot water supply. SUMMARY OF THE INVENTION: a device comprises a group heat point (GTP), quarter double-pipe heat networks (CTS) and a local heat point (MTP). In the GTP, the control valve 8 is located on the supply pipe 21 of the external heat network, and its actuator is connected to the output of the heat consumption controller 9, to the inputs of which are connected the outdoor air and water temperature sensors 10, 11 in the supply pipe 23 of the district heating network. In the ICC, the regulatory body 12 is installed on the NBÖ supply pipeline

Description

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23 KTS and connected to the mixing pump 5, and its actuator when: - connected to the output of the heating controller 13, to the inputs of which are connected sensors 14,15.16.17 of the temperature of the outdoor air, water in the supply and return pipes 23, 24 of the heating system air in the corner rooms of the upper floor of the building, an induction flow meter 18 located on the branch of the supply pipe 23 of the CCC to the point where the mixing valve 7 of the temperature controller is connected to it, to which the cold pipelines 29, 23 are also connected and hot water supply, interconnected by a circulation pipe 30. The supply and return pipelines 26, 27 of the stairwell heating system are connected in the MTP to the supply and return pipelines 23, 24 KTS to the point of connection of the induction flow meter 18 and the mixing pump 5. 1 h. P. f-ly, 1 ill.

The invention relates to a district heating technique, and is intended to provide programmed control of heat supply for heating, as well as coordinated heat supply to heating and hot water supply at subscriber inputs of buildings in an open heat supply system.

The purpose of the invention is to save heat and electric energy by implementing programmed regulation of heat supply for heating and coordinated heat supply for heating and hot water supply.

1. The goal is achieved in that in the heat supply system, the group heating unit further comprises a heat flow controller with outdoor air and water temperature sensors in the supply pipe of the district heating network, a control valve located on the supply pipe of the external heating network, the actuator of which is connected to the output of the heat flow controller, the coolant flow controller, connected by the output to the circulation pump, and the input to the one located on the supply pipe One of the district heating networks has a selectable pressure device, and the local heating station additionally contains a temperature controller with a water temperature sensor in the hot water supply pipe, an induction flow meter, and a mixing valve installed along the water in the branch made on the supply pipe of the district heating network, the first is connected to the input of the heating controller, and the last is connected to the pipelines of cold and hot water supply and is connected to the output of the temperature controller, except On the other hand, the local heating unit additionally contains a cold water supply pipe connected to the mixing valve, a circulation pipe equipped with a non-return valve, an inlet and outlet connected to hot and cold water supply pipes respectively, a heating controller with sensors for the outdoor temperature of the local heating unit, water in the supply and return piping systems

heating, air in the corner rooms of the upper floor of the building and the regulatory body / installed on the supply pipe of the district heating network after the point of connection of the branch along

coolant and connected to the output of the heating controller.

2. The goal; the goal is achieved by

that the local heat point is optional

contains staircase heating system

cages with supply and return pipelines connected, respectively, to the supply and return pipelines of the quarter heat network, and the supply pipe of the staircase heating system

the cells are connected to the point of connection of the branch along the water, and the return pipe after the place of connection to the return pipe of the quarter heating network of the mixing pump. System

heating supply (see drawing) contains: a heater 1, a feed pump 2, a district heating pressure regulator 3, a circulation pump 4, a mixing pump 5, a temperature controller 6, a mixing valve 7, a control valve 8, a heat flow controller 9 . outdoor temperature sensor of group heat point 10, water temperature sensor in the supply pipe quarterly

heating network 11, regulating authority 12. heating controller 13, outdoor temperature sensor of the local heating point 14, water temperature sensors in the supply and return piping system

we have heating 15 and 16, an air temperature sensor in the corner rooms of the upper floor of building 17, an induction flow meter 18, heating system 19, a hot water supply system 20, the supply and return pipelines of the external heating network 21 and 22, the supply and return piping of the district heating network 23 and 24, make-up pipe 25, supply and return pipes of the heating system 26 and 27, hot water supply pipe 28, cold water supply pipe 29, circulation pipe 30, hot water temperature sensor 31, heating system no staircase 32, the supply and return pipe of the stairwell heating system 33 and 34, non-return valves 35, 36. selective pressure device 37, flow rate controller 38. The heat supply system operates in three modes of regulation of the heating system (design, program reduction and overflow ), which are carried out in strict sequence, as well as in a mode of coordinated heat supply for heating and hot water supply.

The duration of the design mode and the program reduction and superfluid modes are set by the heating controller program unit. In this case, program control modes are performed in a residential building at night, and in public - off-hours.

The main task of a group heating unit is to divide the heating network into external and quarterly and to maintain the required water temperature in the supply pipe of the quarterly heating network depending on the current outdoor temperature in any control mode. In this case, the heat flow controller 9, having received signals from the outdoor temperature sensor 10, and the water temperature in the supply pipe of the district heating network 11, generates an imbalance signal of the required and measured water temperature values corresponding to the measured outdoor temperature. With a positive or negative value of the imbalance signal, the heat flow controller 9 generates a control signal to the actuator of the control valve 8, which changes the flow rate of water coming from the external heat network 8 to the heater 1, which changes its heat transfer to the quarter heat network and water temperature in the supply pipe is set to the required level.

Another function of a group heating unit is to change the hydraulic mode of a quarterly heating network with - changes in the flow rate of the heat carrier in local heating units. Thus, a change in the flow rate of the coolant in local heat points leads to a change in pressure in the supply pipe of the district heating network, which registers a selective pressure device 37, which transmits the corresponding signal to the flow rate controller 38, the latter changes the speed of the circulation pump 4, which leads to a change in the flow rate of the heat carrier 5 pumped by it, and the necessary hydraulic mode is established in the district heating network.

The main tasks of the local heating center are: creating an optimum 0 ha temperature regime in the heated rooms of the building, maintaining the set temperature of hot water and achieving thermal energy savings through the implementation of programmed regulation and coordinated heat supply. in the calculated mode, the heating controller receives signals from the outdoor temperature sensors 14 воды water temperature in 0 supply 15 and in return 16 pipelines of the heating system and temperature air 17 in the corner rooms of the upper floor of the building. An imbalance signal is generated for the required and measured values of the water temperatures in the supply and return pipes of the heating system j corresponding to the measured outdoor temperature, as well as between the calculated and measured air temperatures on the premises of the building. With a positive or negative value of the unbalance signal, the heating controller 13 generates a control signal to the actuator of the regulating body 12, which changes the flow rate of water coming from the district heating network to the heating system, which accordingly changes the mixing coefficient of the mixing pump 5, temperature water 0 in the supply and return pipes of the heating system 26, 27 and in the rooms of the building, the air temperature will be set at the calculated level. At the same time, in the calculation mode, the temperature controller 6, 5 receives a signal from the hot water temperature sensor 3 and generates an imbalance signal for the set and measured values of the hot water temperature. For positive or negative unbalance signal values, the regulator

temperature 6 generates a control signal to the actuator of the mixing valve 7 which changes. The ratio of the flow rates of water coming from the supply pipe of the district heating network 23, cold water supply pipe 29 and circulation pipe 30 to the hot water supply pipe 28 and the hot temperature water is set at a predetermined level.

In the program for reducing heat supply, the heating controller 13 first supplies a control signal to the actuator of the regulator 12, which blocks the flow of water from the district heating network to the heating system, the heat consumption for heating is stopped and the air temperature in the building is reduced to a predetermined level (controlled by air temperature sensors 17). When the indoor air temperature reaches a predetermined value, the signal from the temperature sensors 17 enters the heating controller 13 and the latter generates a control signal to the actuator of the regulatory body 12, which opens the flow of water from the district heating network to the heating system in the amount necessary to maintain the air temperature in rooms at a given level. In order to carry out a programmed reduction of heat supply in building heating systems at night, with the possible absence of hot water supply, hot water is circulated in the district heating network through the heating systems of stairwells 32. which will also prevent their freezing in this period.

In the program superheat mode, the heating controller 13 supplies a control signal to the actuator of the regulatory body 12, which is fully open and the water flow .. entering the heating system from the district heating network exceeds the calculated value, which will allow to restore the air temperature of the rooms, enclosing structures , furniture and objects to the calculated value (controlled by air temperature sensors 17) and the moment the calculation mode begins.

The mode of coordinated heat supply for heating and hot water supply is carried out at a local heating station during periods of maximum consumption of hot water in the hot water supply system. If the hourly average water flow exceeds the hot water supply of the district heating network 23 taken from the supply pipe, the induction flow meter 18 sends a signal to the heating controller 13, which generates

a control signal to the actuator of the regulatory body 12 and the latter reduces the flow of water coming from the district heating network to the heating system. After the end of the maximum hot water consumption period, the heating system operates in the calculated mode.

Studies show that the operation of the heat supply system in the mode of programmed control of heat supply for heating in the program will allow to save about 10% of heat energy during the heating season, and 5% in the mode of coordinated heat supply. Moreover, in

In buildings, optimal temperature conditions are ensured.

At the same time, the implementation of a coordinated heat supply by the heat supply system will reduce the heat5 consumption in the quarter heat network, increase its throughput and save energy consumed by the circulation pump for transferring heat carrier.

0 In addition to the heat supply system, the preparation of hot water is carried out by mixing water from the supply pipe of the district heating network and from the cold water supply, which will allow

Claims (1)

5 to improve the quality of hot water, reduce the flow rate under the tap water at the heat source, and stabilize the hydraulic regime of the district heating network. The claims 0 1. Heat supply system / containing group and local heat points, the first of which is made in the form of a heater located between the supply and return pipelines 5 of the external and quarter heat network, feed pump and pressure regulator of the quarter heat network and installed on the return pipe of the last circulation pump, and the second is made in the form of a mixing pump located between the supply and return pipelines of the quarter heat network connected to the last the supply and return pipes of the heating system of the building5, and the hot water supply pipe connected through the mixing valve to the supply pipe of the district heating system ty, characterized in that, in order to save heat and electricity by the implementation of program regulation of heat supply for heating and coordinated heat supply for heating and hot water supply, the group heating unit further comprises a heat flow controller with temperature sensors for outdoor air and water in the supply pipe of the district heating network, a control valve located on the supply pipe of external heat - howl network, the actuator of which is connected to the output of the heat flow controller, the flow controller connected the outlet to the circulation pump, and the inlet to the selectable pressure device located on the supply pipe of the district heating network, and the local heating station additionally contains a temperature controller, with a water temperature sensor in the hot water supply pipe, an induction flow meter and a mixing valve installed on water flow at the hotel, made on the supply pipe of the district heating network, the first connected to the input of the heating controller, and the last connected to the cold pipelines water supply and hot water supply and is connected to the outlet of the temperature controller, in addition, the local heating station additionally contains a cold water supply pipe connected to the mixing valve, a circulation pipe equipped with a check valve, and an inlet and outlet connected to hot and cold water supply pipes, respectively , heating controller with outdoor temperature sensors at the local heating point, aodes in the supply and return piping of the heating system, air in the corner the premises of the upper floor of the building and the regulator installed on the supply pipe of the district heating network after the location. 2, The system according to claim 1, characterized in that the local heating unit further comprises a staircase heating system with supply and return pipelines connected respectively to the supply and return pipelines of the quarter heating network, the supply pipe of the stairwell heating system being connected to the connection point branches along the water, and the return pipe after the point of connection to the return pipe of the quarter heating network of the mixing pump.