RU16673U1 - INDIVIDUAL HEAT ITEM HEATING SYSTEM - Google Patents

Abstract

An individual heating unit heating system comprising supply and return pipelines, a coolant supply regulator, a water-jet elevator, a pump, heating devices and a jumper connecting the elevator receiving chamber to a return pipe, sequentially installed on the supply pipe, characterized in that it is parallel to the coolant supply regulator and / or A bypass line with a shut-off element is turned on.

Description

The heating system of an individual heating unit.

The invention relates to thermal power devices and can be used in newly built and reconstructed heat points intended for

connection to heating networks of heating, ventilation, air conditioning

air, hot water supply and technological heat-using plants

industrial and agricultural enterprises, residential and public buildings.

A well-known heat supply system (see, for example, Industrial heat and power engineering and heat engineering, - reference book edited by V. Atrigoryev and V. M. Zorin, M. Energoatomizdat, 1983, p. 321, Fig. 4.6b), containing the supply and return pipelines sequentially installed on the supply pipe water-jet elevator, the input of the receiving chamber of which is connected to the return pipe, and heating devices. The system can be supplemented with a control valve (indicated by a dashed line in Fig. 4.66) installed on the supply pipe in front of the elevator.

The disadvantage of the known scheme in the absence of a control valve is

the fact that it is uncontrollable and in warm weather there is an overspending of thermal energy, and in the presence of a control valve, the drawback of the circuit is that, at a small degree

valve opening elevator loses its mixing properties.

Known heat supply system (see. Journal of Energy Saving, No. 3, 1999

p. 38-39), which contains the supply and return pipelines, a tee, a mixing pump, heating devices and a jumper with a non-return valve between the return piping and the tee, sequentially installed on the supply piping. Presented technical solution

MPK6-R24DZ / 00.

This is used by Danish company Danfoss. In its composition, it has a complex

electronic valve control equipment. When implementing the scheme, it is necessary to dismantle the water-jet elevators installed in the Russian heat supply systems, since they are not provided for by the known scheme. The control valve is controlled by an electronic control device that takes into account changes in outdoor temperatures, indoor air, coolant temperature in the supply and return pipelines and has additional temperature settings at night and on non-working days. With its help, a temperature schedule is set, and while maintaining a given temperature in the room, a parallel shift of this schedule occurs due to the operation of the control valve. A mixing pump circulates the coolant in the system and its role increases as the control valve closes.

A disadvantage of the known heat supply system is the lack of reservation of its operability, since when any element of both the system and the control device fails, it stops working. Moreover, in a system without an elevator, which is the matching element between the external heating network and the heating system, there can be heat shock. It should also be noted that the dismantling of the elevator increases the cost of implementing the system.

The authors adopted the heating system of an individual heat point (ITP) for the prototype (see SNIP Design of heat points, SP 41-101-95, Ministry of Construction of Russia, M, 1997, p. 5, p. 3.7 and p. 15, Fig. 9a ), containing the supply and return pipelines, sequentially installed on the supply piping regulator

coolant supply, a water-jet elevator, a pump, heating devices and a jumper connecting the receiving chamber of the elevator with a return pipe. In the known heat supply system, depending on the pressure in front of the node

2 mixes, the mixing pump can be mounted on a jumper, feed or

return piping.

The system operates as follows.

The hot coolant flows from the heating network to the IGL heating system through the supply pipe and its flow rate is changed by the coolant supply regulator in accordance with the control signal from the control device. Maintaining the temperature graph in the supply pipe, as well as controlling the temperature of the coolant and air is carried out by a regulating device using temperature sensors of the coolant and air. A pump mounted on a jumper between the supply and return pipelines ensures the circulation of the coolant in the heating system of the facility. The coolant is mixed from the return pipe by a water-jet elevator, the receiving chamber of which is connected to the jumper.

A disadvantage of the known heating system is the lack of reliability. This is explained by the fact that if the coolant supply controller or mixing pump fails, or the power supply fails, the system fails, since in any of these cases the pressure drop sharply decreases on the elevator and it loses its functionality. To restore the efficiency of the heating system, it is necessary to dismantle the inoperative elements with the cessation of the coolant supply to the heating system of the facility, which is extremely undesirable in the heating season.

The task at hand is to ensure the susceptibility of the existing system.

heating an individual heating unit to new developments with minimal alterations.

SHU ## G

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The specified technical result is achieved by the fact that in the known heat supply system containing the supply and return pipelines, successively installed on the supply pipe coolant supply regulator, a water-jet elevator, a pump, heating devices and a jumper connecting the elevator receiving chamber to the return pipe, parallel to the control valve and / or a bypass line with a shut-off element is turned on for the pump.

According to a proposal by the authors, the existing heating system in Russia for an individual heating unit becomes, without radical alterations, susceptible to new upgrades and its operability does not decrease at all, but improves qualitatively. First, without dismantling the elevator mixing unit, the coolant supply regulator and the pump crashed into the pipeline system. At the same time, with a normal pressure in the external network (7-8 kgf / cm2) and a fully open control valve, the elevator works as a mixing pump, the pump works in the light mode, hot water is effectively driven through heating devices. When the pressure drop across the control valve increases during warming, the elevator's operation more and more approaches the operation of a conventional tee and the circulation of water in the heating system is increasingly provided by the pump. Secondly, in case of failure of the coolant supply controller and / or pump or loss of power supply, shut-off valves on bypass lines are opened manually or automatically and the system continues to work according to the previous scheme with the elevator as a mixing pump. Thirdly, the introduction of a heat supply controller in the heat supply system, controlled according to the temperature schedule, taking into account the temperature

outdoor air and with the ability to change the temperature in the room at night and after holidays, in particular in administrative buildings, allows you to save heat and at the same time create comfortable conditions both in winter and in spring, when the temperature of the coolant is most often overpriced by

relative to the thermal needs of the building.

In the accompanying drawing in FIG. 1 shows an embodiment of the proposed technical solution, FIG. 2 is a temperature graph for explaining the operation of the system.

The heat supply system comprises a supply pipe 1, a return pipe 2, a coolant supply controller 3, a water-jet elevator 4, a pump 5, heating devices 6, a bypass line 7 with a shutoff element 8 connected in parallel with the coolant supply controller 3, and a bypass installed in series on the supply pipe 1 a line 9 with a shut-off element 10 connected in parallel with the pump 5. The return pipe 2 is connected by a jumper 11 to the input 12 of the intake chamber of the elevator 4 to provide a mixture of coolant from the return pipe water 2. The control device 13 is electrically connected to the controller 3 and to the sensors 14, 15, 16 and 17, respectively, of the outdoor temperature, the room, the coolant in the supply pipe 1 and the coolant in the return pipe 2. Shut-off elements 8 and 10 can be used as controlled manually or automatically. In figure 2, the following notation is introduced: Tv - temperature in the room; T1 is the temperature of the coolant in the supply pipe; Tn outdoor temperature.

The system works as follows.

The control device 13 receives signals from temperature sensors 14,15,16 and 17 and gives a control action to the regulator 3. The control action of the control 3 is so as to maintain the required temperature dependence

the coolant entering the heaters 6, from the temperature of the outside (street) air. In Fig.2, this dependence (temperature graph) is shown by a solid line. Moreover, depending on the parameters of the coolant in the external heat network, the controller 3 can have any degree of opening. When fully

MOOMW

5 open regulator 3 the pressure drop of the coolant on it is small and the elevator 4

works in its usual mixing mode. If the degree of opening of the regulator 3 is small, the pressure drop of the coolant on it is large, the elevator 4 leaves the water-jet pump mode and loses the ability to mix the coolant from the return pipe. In this case, the circulation of the coolant through the heating devices 6 is provided by the pump 5. The regulating device 13, having a control effect on the regulator 3 of the coolant supply, maintains a predetermined room temperature using the sensor 15 ,. This occurs by parallel shifting the temperature graph. 2, the temperature in the room, i.e. when setting a higher room temperature, the temperature graph line shifts up. In the normal mode of operation of the heat supply system, the locking elements 8 and 10 are in the closed state. The opening of the locking elements 8 and 10 occurs when the controller 3, control device 13, pump 5 with a drive, temperature sensors 14, 15, 16, 17 fail or power failure occurs. In this case, the amount of heat supplied to the heating devices 6 is determined by the operation of the water-jet elevator 4.

Thus, the proposed implementation of the heating system of an individual heating unit allows to increase the reliability and controllability of the ITP heating system in the presence of contaminants in the coolant, power failure and failure of the working elements of both the heating system and the control system of working elements.

b

Claims (1)

An individual heating unit heating system comprising supply and return pipelines, a coolant supply regulator, a water-jet elevator, a pump, heating devices and a jumper connecting the elevator receiving chamber to a return pipe, sequentially installed on the supply pipe, characterized in that it is parallel to the coolant supply regulator and / or A bypass line with a shut-off element is turned on.