RU2239751C1 - Method of control of mode of operation of water heating system and device for realization of this method - Google Patents

Abstract

FIELD: heat-power engineering; centralized heating systems.

SUBSTANCE: proposed method includes delivery of heating-system water by pumping the heat-transfer agent with the aid of circulating pump. Change in ratio of flow rates of heating-system heat-transfer agent and added agent is effected in synchronism by means of balancing valves which maintain total flow rate at constant level. Device proposed for realization of this method includes circulating pump mounted in supply main after mixing unit. Balancing valves are fitted before mixing unit and on mixing main. Mixing main is additionally provided with check valve fitted before balancing valve.

EFFECT: enhanced efficiency; reduction of consumption of heating-system water by 20-30%.

4 cl, 1 dwg

Description

The invention relates to a power system, namely to heat supply, and can be used in district heating systems of buildings with insufficient pressure drop directly in front of the heating unit.

A known method and device for regulating the operation of a water heating system with insufficient available pressure at consumers, comprising supplying network water to the heating system from the supply line by pumping the coolant with a circulation pump. These pumps are installed on the supply line after the mixing unit. In this case, the flow rate of the coolant from the supply line is regulated by a flow regulator of direct or direct operation, and the excess pressure of the pump by a pressure regulator of direct or direct action (see Adjustment and operation of water heating networks .: Reference / V.I. Manyuk et al. - M .: Stroyizdat, 1988, pp. 84-85).

The disadvantage of the data of the method and device is the use of complex electronic equipment, its high cost. In addition, the operation of this method and device depends on the power sources, and also requires constant qualified monitoring of the operation of electronic equipment.

The technical problem, the solution of which the proposed solution is aimed at, is to increase efficiency without compromising the reliability of the system by regulating the flow of coolant.

The problem is solved in that the method of regulating the mode of operation of the water heating system includes supplying network water to the heating system from the supply line by pumping the coolant with a circulation pump. The change in the ratio of the flow rates of the network and mixing coolant is carried out synchronously by balancing valves, maintaining the total flow rate of the coolant constant.

New in the proposed method is that the change in the ratio of the costs of the network and mixing coolant is carried out synchronously by balancing valves, keeping the total flow rate of the coolant constant.

To implement this method, a device for controlling the mode of operation of a water heating system is proposed, comprising a circulation pump on the supply line after the mixing unit. In front of the mixing unit and on the mixing line, balancing valves are installed. The mixing line is supplemented by a check valve installed in front of the balancing valve.

In addition, a filter for cleaning the coolant can be installed in the device on the supply line. The specified device can also be supplemented by a balancing valve on the return line.

New in the proposed device is that in front of the mixing unit and on the mixing line, balancing valves are installed. The mixing line is supplemented by a check valve installed in front of the balancing valve.

In addition, a filter for cleaning the coolant can be installed in the device on the supply line. The specified device can also be supplemented by a balancing valve on the return line.

Analysis of scientific, technical and patent information shows the lack of coincidence of the distinctive features of the proposed method and device with the signs of known technical solutions. Based on this, we can conclude that the claimed technical solutions meet the criterion of "novelty." The proposed technical solutions have significant features that together affect the achieved result, namely the possibility of using cheaper equipment that is independent of the power supply, which allows stabilization of temperature in heated rooms within the normal range.

The proposed solution is presented in a schematic diagram.

The device for regulating the operation of the water heating system contains the supply and return lines 1 and 2 of the heating network, direct and return pipelines 3 and 4 of the heating system, a pump 5 installed on the direct pipe 3 of the heating system after the mixing unit 6. In front of the mixing unit 6 and on the mixing line balancing valves 7, 8 are installed. A filter 9 for cleaning the coolant is installed on the supply line. On the return line 2, a balancing valve 10 can be additionally installed. In order to ensure a reliable supply of heat to the consumer in the event of a pump 5 failure, a check valve is installed on the mixing unit 11. When dismantling the pump 5, a ball valve 12, also shut-off, is installed on the direct pipeline of the heating system 3 fittings are balancing valves installed in front of the mixing unit and on the mixing line. To ensure visual control of pressure and temperature, the circuit provides for the installation of pressure gauges 13 and thermometers 14 on the supply and return pipes 1.2 and the pipelines of the heating system 3.4.

The method of regulating the operating mode of the system is as follows.

Mains water from the supply line 1 of the heating network passes through a filter 9 designed to protect the balancing valves 7, 8, 10 of the pump 5, arriving at the balancing valve 7, designed to limit the flow of coolant from the supply line to the calculated value and acting as a flow regulator. Passing through the mixing unit 6, where a balancing valve 8 is installed, which provides the calculated mixing coefficient and restricts the flow of coolant from the return pipe 4 to the calculated value, the coolant enters the circulation pump 5, and then into the heating system. To prevent direct heat transfer from the supply line 1 to the return line 2 of the heating network through the mixing line 6, a check valve 11 is installed on it. The heat carrier from the heating system, passing through the mixing unit 6, enters the return line 2 of the heating network, where an additional balancing can be installed valve 10, which prevents capsizing circulation in the heating system. The balancing valve 10 is configured to quench the excess pressure created by the pump and to skip the calculated flow rate, i.e., it acts as a pressure regulator.

Implementation of the proposed method and device provides an increase in regulation efficiency by keeping the total flow rate of the network and mixed water constant, which leads to heating of the building (stabilization of the room temperature within normal limits), as practice has shown, this is achieved within 1-2 weeks, and to reduce consumption network water up to 20-30%.

Claims (4)

1. The method of regulating the operation mode of the water heating system, including the supply of network water to the heating system from the supply line by pumping the coolant with a circulation pump, characterized in that the change in the flow ratio of the main and mixing coolant is carried out synchronously by balancing valves, maintaining the total flow rate of the coolant constant. 2. A device for controlling the operation mode of a water heating system, comprising a circulation pump on the supply line after the mixing unit, characterized in that balancing valves are installed in front of the mixing unit and on the mixing line, and a check valve is installed on the mixing line in front of the balancing valve. 3. The device according to claim 2, characterized in that a coolant filter is installed on the supply line. 4. The device according to claims 2 and 3, characterized in that a balancing valve is additionally installed on the return line.