RU43948U1 - SYSTEM OF AUTONOMOUS HEAT SUPPLY AND HOT WATER SUPPLY WITH NATURAL HEATING CIRCULATION - Google Patents

Abstract

System of autonomous heat supply and hot water supply with natural circulation of the coolant The utility model relates to water heat supply systems and can be used in autonomous heat supply and hot water supply systems. The technical result consists in: - increasing the stability of the circulation of heating water; - increasing the stability of the system in case of emergency interruption of water from the water supply; - preventing boiling of hot water in the main riser; - intensification of mixing cold and hot water in the expansion tank; - simplifying the operation of the system for multi-story buildings. The system of autonomous heat supply and hot water supply with natural circulation of the coolant contains a heat generator, an expansion tank, which is also used as a capacitive heater and a hot water storage tank with a float valve to automatically maintain the water level in it and a control overflow pipe, the main riser connecting the upper point of the water jacket of the heat generator with the bottom of the expansion tank, a supply pipe connecting the lower part of the side walls of the expansion tank with risers heating and risers hot water heaters connected to the risers heating, showers mesh and hot water taps, connected to the hot risers

water supply, heat supply risers and hot water supply risers are connected at the lower points with a return pipe that is connected to the lower point of the water jacket of the heat generator and forms a single coolant circulation loop, the heating risers and hot water risers at the upper and lower points have shutoff valves. The expansion tank is a heat accumulator made in the form of a vertically mounted cylinder and is equipped with a tangential cold water supply pipe installed in the upper part of the tank and a hot water discharge tangential pipe installed in its lower part, the supply and return pipes are made in the form of rectangular loops and are connected respectively to expansion tank - heat accumulator and with a heat generator in the geometric centers of rectangular rings through T-shaped pipelines, each riser is hot the water supply is connected to the supply pipe of the upper pipe wiring through an intermediate heat storage tank, the bottom of which is located above the supply pipe at the outlet of the expansion heat storage tank by at least 100 mm, a sensor for automatically maintaining the set temperature of hot water supplied for the needs of heat supply and hot water supply installed at the outlet of their expansion tank.

Description

The utility model relates to water heat supply systems and can be used in stand-alone heat supply and hot water supply systems.

Known water heating system, including the supply and return lines, the supply and return piping of the heating system, pipelines of hot and cold water, and the water for hot water is taken from the heating system (see Livchak I.O., "Apartment heating", M., 1982, p.130, fig. 111.2-3).

A disadvantage of the known analogue is the low efficiency of the heating devices.

Known water heating system with natural circulation for multi-storey buildings on.with. USSR No. 1638480, publ. March 30, 1991

The natural circulation system contains a heat generator, heating devices connected to it by supply and return pipelines with the formation of a coolant circuit. In order to increase the driving pressure and increase the reliability of circulation for multi-story buildings, the system is equipped with a condenser-heat exchanger installed along the cooling line on the supply line and along the heating line on the return pipe, the condenser-heat exchanger located above the heat generator.

The disadvantages of the known water heating system with natural circulation are:

- lack of solutions for hot water supply;

- instability of circulation of heating water;

- the lack of burners in the circuit, providing energy savings;

- the complexity of the system for multi-story buildings.

Known heating system with natural circulation of the coolant and hot water supply according to patent RU 2123155, MKI 6: F 24 D 3/08, publ. 12/10/98, selected by the applicant as a prototype.

The known system is intended for autonomous heating and hot water supply of buildings. The system is equipped with automatic replenishment of the expansion tank-heat accumulator with preheated water at insignificant lump sums of hot water (morning toilet, dishwashing, etc.), which is carried out by connecting the float valve of the expansion vessel to the outlet pipe of the preheater of cold tap water of the heat generator. Simultaneously, the entire system is recharged with pre-heated water at large lump sums of hot water (bath, shower, etc.), which makes it possible to use the entire system as a hot water accumulator eliminates the disadvantages when recharging the system with cold water. The prototype has the following disadvantages, namely:

- instability of circulation of heating water;

- instability of the system in case of emergency interruption of water from the water supply;

- the possibility of boiling hot water in the main riser;

- the absence in the circuit of an intensification element for mixing cold and hot water in the expansion tank;

- the complexity of the system for multi-story buildings.

The technical result of the utility model is aimed at eliminating the above disadvantages of the prototype and is achieved by the following solution.

In an autonomous heat supply and hot water supply system with natural circulation of a heat carrier containing a heat generator, an expansion tank, which is also used as a capacitive heater and a hot water storage tank with a float valve to automatically maintain the water level in it and a control overflow pipe, the main riser connecting the upper point water jacket of the heat generator with the bottom of the expansion tank, a supply pipe connecting the lower part of the side walls of the expansion tank with standing heating supply pipes and hot water pipes, heaters connected to heating pipes, shower nets and hot water taps connected to hot pipes, heating pipes and hot pipes are connected at the lower points to a return pipe that is connected to the lower point of the water jacket of the heat generator and forms a single coolant circulation loop, the heating pipes and the hot water pipes at the upper and lower points have shut-off valves, according to of a useful model, the expansion tank-heat accumulator is made in the form of a vertically mounted cylinder and is equipped with a tangential pipe for supplying cold water installed in the upper part of the tank and a tangential pipe for removing hot water installed in its lower part, the supply and return pipelines are made in the form of rectangular loops and are connected respectively with an expansion tank-heat accumulator and with a heat generator in the geometric centers of rectangular loops through T-shaped pipelines, each riser is connected to the supply pipe

the upper pipe wiring through an intermediate heat storage tank, the bottom of which is located above the supply pipe at the outlet of the expansion heat storage tank by at least 100 mm, a sensor for automatically maintaining the set temperature of hot water supplied for heating and hot water supply is installed at the outlet their expansion tank.

In addition, in the system of autonomous heat supply and hot water supply with natural circulation of the coolant, the diameter of the main riser is assumed to be minimal according to design standards, providing a water velocity of 1.0 to 1.2 m / s in it.

At the same time, in the system of autonomous heat supply and hot water supply with natural circulation of the coolant, the diameters of the heat supply risers are taken to be maximum according to the design standards, providing a water velocity of up to 0.5 m / s in them.

In the system of autonomous heat supply and hot water supply with natural circulation of the coolant, a circulation pump is installed at the inlet of the coolant in the heat generator.

In addition, the expansion tank-heat accumulator is equipped with a pipe for parallel supply of cold water directly to the main riser according to the pipe-in-pipe scheme, while the internal supply pipe is perforated and its end is plugged with a cone-shaped plug.

In the system of autonomous heat supply and hot water supply with natural circulation of the coolant, a steam boiler with a circulation rate of 50 to 500 was used as a heat generator.

The heat generator can be equipped with gas burners without forced air supply.

In addition, temperature regulators of room-by-room air temperature control can be installed on heating devices.

The essence of the proposed technical solution is illustrated by the drawings depicted in Fig 1 and Fig.2.

Figure 1 shows a system of autonomous heat supply and hot water supply with natural circulation of the coolant.

Figure 2 shows a view along arrow A in the drawing of figure 1.

The system of autonomous heat supply and hot water supply with natural circulation of the coolant contains a heat generator 1, an expansion tank-heat accumulator 2, made in the form of a vertically mounted cylinder, the main riser 3.

The expansion tank 2 is also equipped with a float valve 4, which regulates the water level in it, and a control overflow pipe 7.

A pipe 5 supplying cold water from the water supply pipe is connected to the heat accumulator tank 2. The pipe 5 is connected via a tee to a valve 6, the outlet pipe of which is located tangentially relative to the expansion tank 2. A pipe 13 is cut into the pipe 5, the end of which is perforated, plugged and placed inside 4 main riser 3. To the lower part of the heat accumulator tank 2 a pipe 14 is tangentially connected, connecting the tank 2 to the supply pipe 15 of the upper pipe wiring, made in the form of a rectangular loop Application through the T-shaped fitting 16 fixed to the conduit 15 at its geometric center. The supply pipes 15 of the upper pipe wiring are connected to the risers 17 of the heat supply with heating devices 18, the inlet pipes of which are equipped with thermostats 20. The risers 21 of the hot water supply, equipped with apartment water taps and shower nets 22, are connected to the supply water supply

through the intermediate heat storage tanks 23, the bottoms of which are located at least 100 mm above the pipe 14. The risers 17 and 21 are connected in the lower part to the return pipe 24 of the lower pipe wiring. The return pipe 24, as well as the supply pipe 15, is made in the form of a rectangular loopback and connected to the lower part of the heating jacket of the heat generator 1 using a T-shaped pipe 25 connected to the pipe 24 in its geometric center. The system is equipped with a circulation pump 27, a burner 28.

The system is equipped with a sensor 29 for the temperature of hot water at the outlet of the expansion tank 2, located on the pipe 14.

The proposed system of autonomous heat supply and hot water supply with natural circulation of the coolant works as follows.

The system is filled with water through the pipeline supplying cold water from the water supply pipe 5. The water level in the tank 2 is regulated by a float valve 7. The system is fed with cold water during operation through valve 6, the outlet tube of which is located tangentially relative to the expansion tank 2, and through the pipe 13, the end of which is perforated, plugged and placed inside the main riser 3, which prevents the release of steam into the expansion tank 2 from the riser 3.

When the heat generator 1 is operating, water heated to the boiling point under the influence of the difference in the weight of the water columns in the return risers 17 and 21 and the main riser 3 from the heat generator 1 along the main riser 3 enters the expansion tank 2. Here, the heating water is mixed with cold water entering from a water supply system, heats it to the temperature accepted for hot water supply. Water heated in the tank 2 is supplied through a pipe 14 located at the lower point of the heat storage tank

2, tangentially with respect to it, and enters the supply pipe 15 of the upper pipe wiring.

The tangential supply of cold water to the expansion tank and the tangential removal of hot water from it provide rotational movement of water in the tank, which contributes to intensive mixing of the heating water coming from the heat generator 1 and cold water coming from the water supply.

Through the supply pipe 15 of the upper pipe wiring, hot water flows to the risers 17 of the heat supply and heating devices 18, as well as to the risers 21 of the hot water supply and through them to the apartment taps and shower nets 22, while the hot water is supplied to the risers 21 through the intermediate tanks heat accumulators 23, the bottoms of which are located above the pipe 14 not less than 100 mm. This ensures the operation of heating devices during an emergency shutdown of tap water, since first of all hot water will not enter the risers 21 of hot water supply. In risers 17 and 21, heating appliances 18, hot water gives up some of its heat, and through water taps and shower nets 22 it is partially disassembled for the needs of hot water supply. Chilled water from risers 17 and 21 through the return pipe 24 of the lower pipe wiring returns to the heat generator 1, completing the circulation circuit. The circulation pump 27 increases the stability of the circulation of the coolant during transient conditions.

At the end of the heating season, the risers 17 of the heat supply from above and below are closed by valves, and the risers 21 of the heat supply continue to function.

The proposed system of autonomous heat supply and hot water supply with natural coolant circulation is applicable for multi-story buildings, for example, 10-story and even higher, since

by increasing the height of buildings, the driving pressure of natural circulation increases proportionally.

The driving pressure of the natural circulation of the proposed system of autonomous heat supply and hot water supply, taking into account the heating of the water in the boiler to the boiling point due to the formation of the steam-water mixture, may even be excessive to ensure reliable circulation of the coolant, as a result of which the circulation pump will rotate idle, practically without consuming electricity, but in transient conditions, a pump may be useful to increase circulation stability.

The use of an autonomous heat supply system and hot water supply for high-rise buildings in the form of an annex allows you to have a chimney of high height and, therefore, with a large self-pull, sufficient to evacuate combustion products and use burners in a heat generator without forced supply of combustion air, and therefore, without energy consumption .

Given the savings in energy consumption at the circulation pump and at the blower fan drive of the heat generator burners, it can be argued that the proposed autonomous heat supply and hot water supply system is very economical.

Claims (8)

1. The system of autonomous heat supply and hot water supply with natural circulation of the coolant, containing a heat generator, an expansion tank-heat accumulator, which is also used as a capacitive heater, and a tank - a hot water accumulator with a float valve to automatically maintain the water level in it and a control overflow pipe, the main riser connecting the upper point of the water jacket of the heat generator with the bottom of the expansion tank-heat accumulator, a supply pipe connecting the lower part of the sides walls of the expansion tank-heat accumulator with heating pipes and hot water pipes, heaters connected to heating pipes, shower nets and hot water taps connected to hot pipes, heating pipes and hot pipes are connected at the lower points to the return pipe, which connected to the lower point of the water jacket of the heat generator and forms a single circuit of the circulation of the coolant, risers and hot water risers in the upper and lower points have shut-off valves, characterized in that the expansion tank-heat accumulator is made in the form of a vertically mounted cylinder and is equipped with a tangential cold water supply pipe installed in the upper part of the tank and a hot water discharge tangential pipe installed in its lower part, the supply and return pipelines are made in the form of rectangular loops and are connected respectively to an expansion tank-heat accumulator and to a heat generator in straight geometric centers of loop loops through T-shaped pipelines, each riser of hot water supply is connected to the supply pipe of the upper pipe wiring through an intermediate heat storage tank, the bottom of which is located at least 100 mm higher than the supply pipe at the outlet of the expansion heat storage tank, automatic maintenance sensor the set temperature of hot water supplied for the needs of heat supply and hot water supply is installed at the outlet of the expansion tank. 2. The system of autonomous heat supply and hot water supply with natural circulation of the coolant according to claim 1, characterized in that the diameter of the main riser is assumed to be minimal according to design standards, providing a speed of water in it from 1.0 to 1.2 m / s. 3. The system of autonomous heat supply and hot water supply with natural circulation of the coolant according to claim 1, characterized in that the diameters of the heat supply risers are assumed to be maximum according to design standards, providing a water speed of up to 0.5 m / s in them. 4. The system of autonomous heat supply and hot water supply with natural circulation of the coolant according to claim 1, characterized in that a circulation pump is installed at the inlet of the coolant in the heat generator. 5. The system of autonomous heat supply and hot water supply with natural circulation of the coolant according to claim 1, characterized in that the expansion tank-heat accumulator is equipped with a pipe for parallel supply of cold water directly to the main riser according to the pipe-in-pipe scheme, while the internal supply pipe is perforated, and its end is plugged with a cone-shaped plug. 6. The system of autonomous heat supply and hot water supply with natural circulation of the coolant according to claim 1, characterized in that a steam boiler with a circulation rate of from 50 to 500 is used as a heat generator. 7. The system of autonomous heat supply and hot water supply with natural circulation of the coolant according to claim 1, characterized in that the heat generator is equipped with gas burners without forced air supply. 8. The system of autonomous heat supply and hot water supply with natural circulation of the coolant according to claim 1, characterized in that the thermostats are equipped with room temperature controllers.