KR101089731B1 - System for providing hot-water generated by combined heat and power plant - Google Patents

Abstract

A cogeneration hot water supply system is provided by installing a step-down valve and a strainer in an individual boiler to provide a working pressure required by each individual generation and to remove foreign substances contained in the cogeneration hot water supplied through the cogeneration hot water piping. The cogeneration hot water supply system includes a cogeneration generator that generates electricity by cogeneration, and generates cogeneration hot water by waste heat discharged after being used by cogeneration; A cogeneration hot water tank for storing cogeneration hot water generated using a cogeneration generator; A cogeneration hot water pipe branched from the cogeneration hot water tank to supply cogeneration hot water to a plurality of individual households; A step-down valve, which is installed in each individual household and is connected to a cogeneration hot water pipe to regulate the pressure of the cogeneration hot water; And an individual boiler installed in each household to supply heating and heated hot water, and a built-in step-down valve to separately supply hot water from heat-coupled hot water and heated hot water whose operating pressure is controlled by the step-down valve. It provides the operating pressure required by each individual household regardless of the pressure difference caused by the difference in distance between the combined heat and hot water tank and each individual household, and heat generated from the combined heat and hot water piping is provided inside the individual boiler to prevent freezing. It is characterized in that the heat and water passage is formed in the interior of the individual boiler so that the cogeneration hot water pipe passes through the interior of the individual boiler, respectively.

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Description

System for providing hot-water generated by combined heat and power plant}

The present invention relates to a cogeneration hot water supply system, and more particularly, to a cogeneration hot water supply system for supplying cogeneration hot water supplied from a cogeneration generator to be easily used in an individual generation.

In general, a power generation-only method such as a commercial thermal power plant produces only 1/3 of the input energy, and 2/3 of the energy is wasted into rivers or the sea through condensers. The combined heat and power plant (CHP) method, which can improve energy use efficiency by recovering the lost heat and using it as cooling and heating heat, has been adopted as a main heat source facility for collective energy supply.

Cogeneration power generation refers to power generation that increases electricity utilization rate by simultaneously generating electricity and supplying heat (heating). For example, in a thermal power plant, fossil energy (coal, petroleum) is burned to boil water. At this time, the steam turbine is used to produce electricity by using the boiled water to generate electricity. Can be.

According to this cogeneration, large-scale energy saving (20~30%) is possible by improving energy use efficiency, and the environment can be improved by reducing fuel consumption and intensive management of pollution prevention facilities, and it is convenient for industrial and residential sectors. Can provide For example, in apartment complexes or apartment houses, electricity can be saved by using small-scale cogeneration.

On the other hand, the existing cogeneration (or central heating) system can solve both hot water and heating at the same time by using the waste heat (or central boiler operation) of the cogeneration generator in the machine room, but the amount of heat remaining after using hot water is as much as the consumer desires. Insufficient to provide heating, the individual boiler system can provide sufficient heating effect, but it requires a certain amount of time to heat the cold water from the individual boiler, and hot water comes out suddenly, so suddenly cold water often occurs. There are disadvantages of difficult temperature control.

Recently, a small cogeneration generator is installed in the machine room of a building and an apartment to supply electricity to solve the optimum heating and the optimum hot water desired by consumers at the same time, and the waste heat generated at this time is recovered and used only as a heat source for hot water supply In addition, separate boilers for heating for each household are installed separately to provide technologies for direct heating for each household.

For example, as a prior art, in the Republic of Korea Patent Application No. 2006-29553 (application date: March 31, 2006), the name of "the system for supplying a hot water + heating complex using a combined installation of a cogeneration generator and an individual boiler" Since the invention has been disclosed, it will be described with reference to FIG. 1.

1 is a schematic configuration diagram of a hot water/heating complex system in which a cogeneration generator and an individual boiler are installed according to the prior art.

Referring to FIG. 1, a hot/heating combined system in which a cogeneration generator and an individual boiler are installed according to the prior art, electricity is supplied by installing a cogeneration generator 10 using LNG gas as fuel in a building and apartment machine room. At this time, the high-temperature waste heat generated at this time is recovered and used only as a heat source for hot water hot water. At this time, the commercial power supplied from KEPCO and the power generated by the cogeneration generator 10 are selectively supplied to the public housing for each household.

In addition, individual heating boilers 20 for each household are separately installed to implement direct heating for each household. In addition, the waste heat remaining after heating the hot water using the waste heat of the cogeneration generator is re-cooled through the cooling tower. In winter, it is also used for melting ice and snow on the entrance of the underground parking lot or the road in the APT complex.

On the other hand, as a prior art, the invention of the Republic of Korea Patent Application No. 2006-47618 (application date: May 26, 2006) titled "Integrated Cogeneration and Individual Heating System" has been disclosed. Simultaneous heating system, combined with cogeneration and individual heating to reduce the fuel consumption of individual boilers by increasing the temperature of hot water through waste heat generated in the cogeneration process and directly discharging it or supplying it to individual boilers It relates to a system and will be described with reference to FIGS. 2 and 3.

FIG. 2 is a configuration diagram of a combined heat and power generation and individual heating system according to the prior art, and FIG. 3 is a view showing a pipe connection of individual boilers in the combined heat and power generation and individual heating system shown in FIG. 2.

Referring to Figure 2, the combined heat and power generation system according to the prior art, cogeneration generator 10, individual boiler 20, heat exchanger 30, hot water tank 40, the branch pipe 60, Hot water valve (70), hot water heating pipe (51), waste heat recovery pipe (52), water supply port (53), hot water supply pipe (54), intermittent valve (55, 56, 57, 58), hot water supply pipe (59), etc. It includes.

Specifically, the combined heat and power generation system according to the prior art is provided with a heat and power generator 10 in the center, and by installing an individual boiler 20 for each household, so that heating can be performed for each household, By collecting the waste heat of the cogeneration generator 10 and accumulating it in the hot water supply tank 40, the hot water supplied in the hot water supply tank 40 is preheated, and the hot water supply pipe 54 connected to the hot water supply tank 40 has a separate boiler for each household ( The branch pipe 60 branched from the hot water supply pipe 54 while connecting to the water supply side for hot water supply of 20) is connected to the hot water supply pipe 59 drawn from an individual boiler.

At this time, the hot water supply pipe 54, the branch pipe 60, the hot water supply pipe 59, as shown by reference numeral A, by providing intermittent valves (55, 56, 57, 58), respectively, the cogeneration generator 10 and While using the individual boilers 20 together, the intermittent valves 55, 56, 57, 58 are opened and closed according to the season so that the hot water that is preheated in the hot water tank 40 is discharged directly to the hot water valve 70, or the individual boilers ( 20).

If the individual boiler 20 is already installed, as shown in Figure 3, while connecting the hot water supply pipe 54 to the pre-installed water supply pipe 61, the water supply pipe 61 of the hot water supply pipe 54 is interrupted at the front end By providing the valve 62, the water supply pipe 61 can also be closed.

However, in the combined heat and power generation and individual heating system according to the prior art described above, since the heat and power generator 10 is conventionally installed as a filtration device only in the underground machine room, the heat and cogeneration hot water is supplied through the pipes in each of the underground transverse pipes and each of the granular pipes. If there are pipes of about 200~300m or more in the remote place before entering each household, there is a problem that all foreign substances such as various debris residues cannot be removed until hot water is introduced into each household. There is a problem in that it is difficult to smoothly use the cogeneration hot water in each generation because a device capable of adjusting the operating pressure of the cogeneration hot water is not installed.

The technical problem to be achieved by the present invention for solving the above-described problem is to install the step-down valve in an individual boiler, so that each individual generation is required regardless of the pressure difference caused by the distance difference between the cogeneration hot water tank and each individual generation. It is to provide a cogeneration hot water supply system capable of providing a working pressure.

Another technical problem to be achieved by the present invention is to provide a cogeneration hot water supply system capable of removing foreign substances contained in cogeneration hot water supplied through a cogeneration hot water pipe by disposing a strainer in an individual boiler.

Another technical problem to be achieved by the present invention is to provide a combined heat and water supply system that can prevent freezing of the water meter by providing the heat of the combined heat and hot water supplied through the pressure reducing valve in the water meter box equipped with a water meter. It is to do.

As a means for achieving the above-described technical problem, a cogeneration generator that generates electricity by cogeneration according to the present invention and generates cogeneration hot water by waste heat discharged after being used by the cogeneration; A cogeneration hot water tank for storing cogeneration hot water generated using the cogeneration generator; A cogeneration hot water pipe branched from the cogeneration hot water tank to supply the cogeneration hot water to a plurality of individual households; Pressure Restriction Valves, which are installed in individual households and are connected to the cogeneration hot water piping to adjust the operating pressure of the cogeneration hot water; And a separate boiler installed in each household to supply heating and heating hot water, and a built-in step-down valve to separately supply hot water selectively from the combined hot and cold water heated by the pressure-reducing valve. The step-down valve provides the operating pressure required by each individual household regardless of the pressure difference caused by the distance difference between the cogeneration hot water tank and each individual household, and heat generated from the cogeneration hot water piping is generated by the individual boiler. It is characterized in that the heat transfer passage is provided in the interior of the individual boiler, the heat-generating hot water piping is respectively provided through the interior of the individual boiler to prevent freezing.

Here, a strainer that is installed between the cogeneration hot water pipe and the step-down valve to remove foreign substances contained in the cogeneration hot water supplied through the cogeneration hot water pipe may be further included.

Here, the step-down valve has a built-in strainer for removing foreign substances contained in the combined heat and hot water supplied through the combined heat and water piping, and is characterized by adjusting the working pressure of the combined heat and hot water with the foreign substances removed.

Here, a temperature sensor installed at the outlet of the step-down valve to sense the temperature of the cogeneration hot water; And a thermometer installed in the individual boiler to display the temperature of the cogeneration hot water detected by the temperature sensor.

On the other hand, as another means for achieving the above-described technical problem, the cogeneration hot water supply system capable of preventing freezing of the water meter according to the present invention generates electricity by cogeneration, and is used after the cogeneration. A cogeneration generator that generates cogeneration hot water by the discharged waste heat; A cogeneration hot water tank for storing cogeneration hot water generated by the cogeneration generator; A cogeneration hot water pipe branched from the cogeneration hot water tank to supply the cogeneration hot water to a plurality of individual households; A water meter installed in each individual household and measuring the amount of water supplied through the water supply pipe; And a step-down valve which is installed in each individual household and is connected to the cogeneration hot water pipe to control the pressure of the cogeneration hot water, and to be in close contact with or enclose the water meter, to prevent freezing of the water meter. It is characterized in that the heat of the cogeneration hot water supplied through the step-down valve is radiated in the water meter box provided with the water meter.

Here, the cogeneration hot water whose operating pressure is adjusted by the step-down valve is supplied to individual boilers respectively installed in the individual households after passing through the water meter box, and the cogeneration hot water pipes respectively pass through the interior of the individual boilers. It characterized in that the heat transfer passage is formed inside the individual boiler.

According to the present invention, by installing a step-down valve in an individual boiler, it is possible to provide a working pressure required by each individual generation regardless of a pressure difference caused by a distance difference between the cogeneration hot water tank and each individual generation.

According to the present invention, by disposing the strainer in an individual boiler, it is possible to remove foreign substances contained in the combined hot and cold water supplied through the combined hot and cold water pipe.

According to the present invention, freezing of a water meter can be prevented by providing heat of cogeneration hot water supplied through a pressure reducing valve in a water meter box provided with a water meter.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part “includes” a certain component, it means that the component may further include other components, not to exclude other components, unless otherwise stated.

As an embodiment of the present invention, by installing a pressure-reducing valve and a strainer in a separate boiler, the combined pressure is provided to provide the operating pressure required by each individual generation, and to remove foreign substances contained in the combined heat and hot water supplied through the combined heat and water piping. A hot water supply system is provided.

4 is a block diagram of a cogeneration hot water supply system according to an embodiment of the present invention.

Referring to Figure 4, the cogeneration hot water supply system 100 according to an embodiment of the present invention, fuel 110, cogeneration generator 120, cogeneration hot water tank 130, cogeneration hot water piping 140, strainer (Strainer) : 151), a step-down valve 152, a temperature sensor 153, and an individual boiler 160, wherein the strainer 151, a pressure-restriction valve (Pressure Restriction Valve: 152), a temperature sensor 153, and an individual boiler 160 are installed in individual households 150, 150a, 150b 150c, respectively.

The cogeneration generator 120 generates electricity by cogeneration using fuel 110 such as LNG gas, and generates cogeneration hot water by using waste heat discharged after being used by the cogeneration.

At this time, the cogeneration hot water tank 130 stores the cogeneration hot water generated using the cogeneration generator 120.

The cogeneration hot water pipe 140 is a branch pipe branched from the cogeneration hot water tank 140, and is for supplying the cogeneration hot water to a plurality of individual households 150.

The strainer 151 is also called a strainer, and is installed between the cogeneration hot water pipe 140 and the step-down valve 152 to remove foreign substances contained in the cogeneration hot water supplied through the cogeneration hot water pipe 140. Do it.

The step-down valve 152 is also called a step-down valve, and is installed in each of the individual households 150 and is connected to the hot water piping 140 to adjust the working pressure of the hot water. At this time, the step-down valve 152 serves to provide the operating pressure required by each individual household regardless of the pressure difference caused by the distance difference between the cogeneration hot water tank 130 and each individual household 150. .

In addition, the step-down valve 152 may include a strainer for removing foreign substances contained in the combined heat and hot water supplied through the combined heat and water pipe 140, to adjust the working pressure of the combined heat and hot water with the foreign material removed.

The individual boilers 160 are installed in individual households 150 to supply heating and heated hot water, and built-in the step-down valve 152, the combined heat and hot water whose pressure is adjusted by the step-down valve 152. Optionally, hot water is supplied. At this time, the individual boilers 160 can be prevented from freezing by forming a heat transfer passage through the cogeneration hot water.

In addition, a temperature sensor 153 is installed at the outlet of the step-down valve 152 to detect the temperature of the cogeneration hot water, and the temperature of the cogeneration hot water detected by the temperature sensor 153 is applied to the individual boiler 150. It can be displayed through an installed thermometer (not shown).

Therefore, the cogeneration hot water supply system 100 according to an embodiment of the present invention, by installing the pressure-reducing valve 152 and the strainer 151 in a separate boiler 160, the operating pressure required by each individual generation 150 Provided, it is possible to remove foreign substances contained in the combined heat and hot water supplied through the combined hot water piping.

On the other hand, the cogeneration system is a system that simultaneously generates heat and power from one energy source and supplies appropriately for each application to maximize energy use efficiency. Compared with existing power plants, this cogeneration system is high in efficiency.

5 is a detailed configuration diagram of a cogeneration system.

Referring to FIG. 5, the cogeneration system 200 includes a coal storage tank 201, a pulverizer 202, a heavy oil/gas tank 203, a boiler 204, a pressurized ventilator 205, and a high pressure water heater 206 ), electrostatic precipitator 207, manned ventilator 208, boiler feed water pump 209, running 210, turbine 211, generator 212, auxiliary multiple turbine 213, transformer 214, steam Supply valve 215, a condensate storage tank 216, a condenser 217, a condensate pump 218 and a condensate recovery pump 219, but is not limited thereto, and the combined heat and hot water according to an embodiment of the present invention Detailed descriptions of unrelated components will be omitted for convenience.

The cogeneration system 20 is largely divided into a power generation facility and a heat production facility, and is a comprehensive energy system that simultaneously produces two different types of energy (heat and electricity) using the same fuel. The cold section operates as an energy system that uses heat.

Therefore, the cogeneration hot water supply system 100 according to an embodiment of the present invention provides cogeneration hot water generated by the above-described cogeneration power generation system 200 so that each generation can easily use it.

On the other hand, Figure 6 is a view illustrating a strainer used in a cogeneration hot water supply system according to an embodiment of the present invention, a) in FIG. 6 shows an outer shape, and b) in FIG. 6 shows a cross section, respectively.

6A and 6B, the cogeneration hot water supply system according to an embodiment of the present invention includes a strainer 151 for each generation between a cogeneration hot water pipe and a step-down valve 152, specifically, an individual By mounting on the side of the boiler, cleaner hot water can be used in each generation, and foreign substances such as debris can be removed through a filtering screen (Screen: 155). At this time, the used filter 155 can be recycled, and cleaning of the filter network 155 can be easily performed in individual households.

As described above, when hot water is made by using engine waste heat in a cogeneration generator installed in an underground machine room, the cogeneration hot water is stored in a cogeneration hot water tank, and a foreign material removal device is provided in the cogeneration hot water tank to remove foreign substances. . However, the combined heat and hot water flows into each household pipe through each underground pipe and each pipe, and thus, foreign substances can be generated. Therefore, additional foreign substances can be added by installing the strainer 151 before being supplied to individual boilers through each household pipe. It can be removed, and the cogeneration hot water that has passed through the step-down valve 152 can be used in the kitchen or shower.

The strainer 151 locks the inlet valve on the front side and completely blocks the cogeneration hot water to remove foreign substances. The strainer 151 may be divided into a screw type or plan knowledge. At this time, the screw-type cover is gradually opened by turning the cover counterclockwise, or the filter net 155 is taken out to remove foreign substances attached to the filter net 155. In addition, after the flange type is disassembled by turning the plug counterclockwise, the fluid in the pipe is taken out, and then the cover is disassembled to clean the filter net 155. Subsequently, after the foreign matter is cleaned and put into a gasket and assembled, it is checked whether there is leakage of the combined heat and hot water, and then the inlet valve is opened and used.

7 is a view illustrating a step-down valve used in the cogeneration hot water supply system according to an embodiment of the present invention, Figure 7 a) shows a small step-down valve (152a), Figure 7 b) is a medium-sized step-down valve ( 152b), and the operating pressure can be checked through the gauge screen 156.

As shown in FIG. 7 a), the small pressure-reducing valve 152a is used for fluid delivery, such as cold water and hot water, and the operating pressure can be adjusted to a pressure of 1 to 6 kgf/cm 2, up to 10 kgf It can be used for pressure of /cm2. At this time, the use temperature can be used at a temperature of 0 ℃ to 80 ℃.

Specifically, the small step-down valve (152a) is a brass body (Body), a plastic cover (Cover) and an inner body (Inner Body), a brass shaft (Shaft), a rubber diaphragm (Diaphragm), It is made of brass disc support, rubber disc and o-ring, gauge screen, and spring.

The step-down valve 152 may be manufactured in various forms, for example, the step-down valve 152 has a built-in strainer for removing foreign substances contained in the combined heat and hot water supplied through the combined heat and water pipe 140. It is also possible to adjust the working pressure of the combined heat and hot water with foreign substances removed.

On the other hand, Figure 8 is a view illustrating the piping connection of individual boilers in the cogeneration hot water supply system according to an embodiment of the present invention.

Referring to FIG. 8, in the cogeneration hot water supply system according to an embodiment of the present invention, the individual boiler 160 includes a cogeneration hot water pipe 161, a hot water pipe 162, a water supply pipe 163, a gas pipe 164, and household heating Pipes such as the pipe inlet 165 and the household heating pipe outlet 166 are connected, and at this time, the individual boiler 160 may incorporate the aforementioned pressure-reducing valve 152, and the gauge screen of the pressure-reducing valve 152 ( 156) is configured to be exposed to the outside, so that it is possible to easily check the operating pressure of the combined hot water from outside.

Therefore, it is possible to selectively use hot water in the kitchen or shower room among heated hot water heated in the individual boilers 160 or hot/cold hot water supplied through the combined heat and water pipe 161. At this time, the combined heat and hot water is provided with the foreign material removed from the above-described strainer and the operating pressure adjusted by the step-down valve. In addition, heating is performed through a pipe installed between the household heating pipe inlet 165 and the household heating pipe outlet 166 of the individual boiler 160.

9 is a side view of an individual boiler in a cogeneration hot water supply system according to an embodiment of the present invention.

9, the side of the individual boiler 160 in the cogeneration hot water supply system according to an embodiment of the invention, for example, a thermometer 157 for measuring cogeneration hot water, a gauge screen 156 of a step-down valve or for measuring hot water The thermometer 167 and the like can be configured to be exposed. Therefore, the combined heat and hot water supplied through the combined heat and water pipe 161 is displayed through the thermometer 157 for measuring the combined heat and hot water after the temperature is detected by the built-in temperature sensor, and after the operating pressure is adjusted through the step-down valve, the gauge The operating pressure of the combined heat and hot water is displayed through the screen 156, and the heated hot water heated in the individual boiler 160 or the supplied combined heat and hot water may be supplied through the hot water pipe 162. The temperature may be displayed through the measurement thermometer 167.

Meanwhile, FIG. 10 is a diagram illustrating that the cogeneration hot water supply system according to an embodiment of the present invention prevents freezing of individual boilers.

Referring to FIG. 10, in the cogeneration hot water supply system according to an embodiment of the present invention, cogeneration hot water according to engine waste heat generated by cogeneration in an underground machine room is provided through heat transfer passages respectively formed in individual boilers 160 of individual generations. By being supplied, it is possible to prevent freezing of individual boilers. Here, the heat transfer passage means a space in which the cogeneration hot water pipe 161 passes through the interior of the individual boiler 160, respectively, and is formed inside the individual boiler. Accordingly, heat generated from the cogeneration hot water pipe 161 is provided inside the individual boiler 160 to prevent freezing.

Specifically, in the case of converting to an individual heating boiler, that is, an individual household using aging central heating, cogeneration heating, or district heating, an individual boiler is installed outside the veranda or corridor because there is no separate boiler room. Most of the time. In addition, the same is true for apartments that use existing individual heating. In this case, the cogeneration hot water of the cogeneration hot water supply system according to an embodiment of the present invention, as illustrated in FIG. 10, can prevent freezing by passing through the interior of an individual boiler.

Meanwhile, FIG. 11 is a diagram schematically illustrating a cogeneration hot water supply system capable of preventing freezing of a water meter according to another embodiment of the present invention.

Referring to FIG. 11, a cogeneration hot water supply system capable of preventing freezing of a water meter according to another embodiment of the present invention includes a cogeneration generator, a cogeneration hot water tank, a cogeneration hot water pipe, a water meter 210 and a step-down valve 220 ). Here, since the configuration of the cogeneration generator, the cogeneration hot water tank, and the cogeneration hot water piping is substantially the same as the configuration illustrated in FIG. 4, the description thereof will be omitted without being shown in the drawings.

Since the water meter frequently freezes during the winter season, the water meter 210 and the step-down valve 220 are installed in the water meter box 200 in close contact with each other, for example, by heat generated from hot and cold water. Freezing of water meters can be prevented.

Specifically, the water meter 210 is installed in each individual household, and measures the amount of water supplied through the water supply pipe, and the pressure-reducing valve 220 is installed in each individual household, and is connected to the heat and hot water piping to connect the hot and cold water. It controls the working pressure and is arranged to be in close contact with or enclose the water meter 210.

Therefore, the heat of the combined heat and hot water supplied through the step-down valve 220 in the water meter box 200 provided with the water meter 210 can be dissipated, thereby preventing freezing of the water meter 210.

Thereafter, the cogeneration hot water whose operating pressure is adjusted by the step-down valve 220 passes through the water meter box 200 and is supplied to individual boilers respectively installed in the individual households. A heat transfer passage is formed through cogeneration hot water.

The above description of the present invention is for illustration only, and a person having ordinary knowledge in the technical field to which the present invention pertains can understand that it can be easily modified to other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention. do.

1 is a schematic configuration diagram of a hot water/heating complex system in which a cogeneration generator and an individual boiler are installed according to the prior art.

2 is a block diagram of a combined heat and power generation and individual heating system according to the prior art.

3 is a view showing the piping connection of individual boilers in the combined heat and power generation and individual heating system shown in FIG. 2.

4 is a block diagram of a cogeneration hot water supply system according to an embodiment of the present invention.

5 is a detailed configuration diagram of a cogeneration system.

6 is a view illustrating a strainer used in a cogeneration hot water supply system according to an embodiment of the present invention.

7 is a view illustrating a step-down valve used in a cogeneration hot water supply system according to an embodiment of the present invention.

8 is a view illustrating the piping connection of individual boilers in the cogeneration hot water supply system according to an embodiment of the present invention.

9 is a side view of an individual boiler in a cogeneration hot water supply system according to an embodiment of the present invention.

10 is a view illustrating that the cogeneration hot water supply system according to an embodiment of the present invention prevents freezing of individual boilers.

11 is a view schematically illustrating a cogeneration hot water supply system capable of preventing freezing of a water meter according to another embodiment of the present invention.

<Brief description of reference numerals>

100: Cogeneration hot water supply system 200: Cogeneration power system

110: fuel 120: cogeneration generator

130: cogeneration hot water tank 140: cogeneration hot water piping

150, 150a, 150b 150c: Individual household

151: strainer 152: step-down valve

153: temperature sensor 155: strainer filter

156: Step-down valve gauge 157: Thermocouple hot water measuring thermometer

160: individual boiler 161: cogeneration hot water piping

162: hot water piping 163: water supply pipe

164: gas pipe 165: household heating pipe entrance

166: household heating pipe outlet 167: thermometer for measuring hot water

200: water meter box 210: water meter

220: Step-down valve 221: Step-down valve gauge

Claims (6)

A cogeneration generator that generates electricity by cogeneration, and generates cogeneration hot water by waste heat discharged after being used by the cogeneration; A cogeneration hot water tank for storing cogeneration hot water generated using the cogeneration generator; A cogeneration hot water pipe branched from the cogeneration hot water tank to supply the cogeneration hot water to a plurality of individual households; Pressure Restriction Valves, which are installed in individual households and are connected to the cogeneration hot water piping to adjust the operating pressure of the cogeneration hot water; And Individual boilers that are installed in individual households to supply heating and heating hot water, and to supply hot water selectively from the combined heat and hot water with the pressure applied by the pressure reducing valve built in the step-down valve and the heated hot water. Including, The step-down valve provides the operating pressure required by each individual household regardless of the pressure difference caused by the distance difference between the cogeneration hot water tank and each individual household, and the heat generated from the cogeneration hot water piping is generated by the individual boiler. Cogeneration hot water supply system, characterized in that the heat transfer passage through the interior of the individual boiler is formed in the interior of the individual boiler so that the cogeneration hot water pipe is provided inside to prevent freezing. According to claim 1, Cogeneration hot water supply system further comprises a strainer that is installed between the cogeneration hot water pipe and the step-down valve to remove foreign substances contained in the cogeneration hot water supplied through the cogeneration hot water pipe. According to claim 1, The pressure-reducing valve has a built-in strainer for removing foreign substances contained in the combined heat and hot water supplied through the combined heat and water piping, and adjusting the working pressure of the combined heat and hot water with the foreign material removed. According to claim 1, A temperature sensor installed at the outlet of the step-down valve to sense the temperature of the cogeneration hot water; And Thermometer installed in the individual boiler and displaying the temperature of the combined heat and water detected by the temperature sensor Cogeneration hot water supply system further comprising a. A cogeneration generator that generates electricity by cogeneration and generates cogeneration hot water by waste heat discharged after being used by the cogeneration; A cogeneration hot water tank for storing cogeneration hot water generated by the cogeneration generator; A cogeneration hot water pipe branched from the cogeneration hot water tank to supply the cogeneration hot water to a plurality of individual households; A water meter installed in each individual household and measuring the amount of water supplied through the water supply pipe; And A step-down valve, which is installed in each individual household, is connected to the cogeneration hot water pipe to adjust the operating pressure of the cogeneration hot water, and is arranged to be in close contact with or enclose the water meter. Including, Cogeneration hot water supply system capable of preventing freezing of the water meter, characterized in that the heat of the combined heat and hot water supplied through the pressure-reducing valve is radiated in the water meter box provided with the water meter to prevent freezing of the water meter. . The method of claim 5, The cogeneration hot water whose operating pressure is adjusted by the step-down valve passes through the water meter box and is supplied to individual boilers respectively installed in the individual households, and the heat transfer passage through which the cogeneration hot water pipes respectively pass through the interior of the individual boilers. Co-generation hot water supply system capable of preventing freezing of the water meter, characterized in that formed in the interior of the individual boiler.

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