KR101619441B1 - Organic rankine cycles generation system utilizing heat storage tank of atmospheric pressure - Google Patents

Organic rankine cycles generation system utilizing heat storage tank of atmospheric pressure Download PDF

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Publication number
KR101619441B1
KR101619441B1 KR1020150090408A KR20150090408A KR101619441B1 KR 101619441 B1 KR101619441 B1 KR 101619441B1 KR 1020150090408 A KR1020150090408 A KR 1020150090408A KR 20150090408 A KR20150090408 A KR 20150090408A KR 101619441 B1 KR101619441 B1 KR 101619441B1
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South Korea
Prior art keywords
storage tank
district heating
organic rankine
rankine cycle
pipe
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KR1020150090408A
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Korean (ko)
Inventor
이종준
김경민
이재승
심영락
임신영
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한국지역난방공사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D10/00—District heating systems
    • F24D10/003—Domestic delivery stations having a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/001—Central heating systems using heat accumulated in storage masses district heating system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/17—District heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]

Abstract

The present invention relates to a district heating generation system, and more specifically, to an organic Rankine cycle generation system utilizing a heat storage tank of an atmospheric pressure. The organic Rankine cycle generation system utilizing a heat storage tank of an atmospheric pressure connects and installs a vaporizer of an organic Rankine cycle on a district heating supply pipe, connects and installs a condenser of an organic Rankine cycle on a district heating return pipe to use high temperature water discharged to a heat storage tank from a cogeneration facility and district heating return water returned to the cogeneration facility from the district heating return pipe to generate power and firstly lower the temperature of the high temperature water, directly mixes the high temperature water whose temperature is lowered with low temperature water of the heat storage tank to secondly lower the temperature of the high temperature water to a prescribed temperature to store the high temperature water to use heat of the high temperature water to generate power in the organic Rankine cycle to generate electricity, lowers the temperature of the high temperature water to the prescribed temperature to store heat, and uses the condenser of the organic Rankine cycle to supply and cool the district heating return water to maximize energy efficiency.

Description

TECHNICAL FIELD [0001] The present invention relates to an organic Rankine cycle power generation system using an atmospheric pressure storage tank,

The present invention relates to a local heating power generation system, and more particularly, to an ORC power generation system using an atmospheric pressure type heat storage tank that performs ORC (Organic Rankine Cycle) power generation using high temperature water of a heat storage tank.

Generally, the district heating system differs from the individual heating system in which the user who supplies the collective energy supplies the collective energy through the piping for the heating and the hot water supply to a plurality of individual users, and the user has individual heating facilities .

In other words, district heating does not have individual heating facilities such as houses, shopping malls, offices, schools, hospitals, factories, etc. in a city or a certain area, and a large-scale heat production facility, (80-120 ℃), which is necessary for the production of electricity, is supplied to each customer through the heat transfer pipe.

These district heating systems consist of a heat source facility for generating electricity and heat, a heat transport facility for transporting the produced heat, and a thermal user facility for supplying the heat transported by the heat transport facility to the user.

The heat source facilities include cogeneration facilities, heat-only boilers, refuse incinerators, thermal storage tanks, heat transport facilities, and thermal user facilities.

The cogeneration facility is a total energy system that simultaneously produces heat and electricity using the same fuel. Generally, the high temperature is used for power and the low temperature is used for process heat. In the case of cogeneration, there is a decrease in the power generation by extracting some heat in the expansion process of the steam turbine, but the discarded heat from the condenser can be used as the process heat or the district heating heat.

Heat-only boilers are steam boilers and hot water boilers that produce heat for district heating. Low-sulfur wax oil (LSWR), B-C oil and LNG are used as fuel, and many of them use coal in Europe.

The waste incinerator is a waste by-product of incineration of waste and steam is used to generate electricity by installing a steam turbine or to use it for cogeneration. However, since the calorific value is constant depending on the quality of waste, It is used under the base.

The heat transfer facility includes a main pipeline system circulation water pump, a heat transfer pipe, a pressurization facility, a heat exchange chamber (or a pressure reducing valve chamber), and a circulation water pump of a distribution pipe system.

The heat user equipment consists of a user heat exchanger that can receive the district heating heat, a differential pressure flow control valve that can smoothly control the flow rate, a circulation pump for heating and water supply, and an expansion tank for storing and replenishing the piping water.

The heat storage tank has the following three functions. The first is to prevent the re-evaporation phenomenon occurring at the saturation pressure of the hot water below the saturation pressure in order to maintain the static pressure of the district heating pipe network. Secondly, as the temperature of the district heating water in the heat pipe increases, Third, the surplus heat is stored at a time when the heat load is low and the heat is stored at a time when the heat load is high. Thus, Since it takes charge of peak load or absorbs fluctuation width of daily load, it absorbs surplus heat, so it can improve the operation rate of equipment and play a role to enable economical operation.

In addition, the heat storage tank is a temperature stratification technique in which the hot water and the low temperature water of the district heating pipe network are separated and stored in a single tank so as not to be mixed with each other. DH water is stored at the bottom of the tank and DH water is stored at the top of the tank.

The heat storage tank is connected to the cogeneration facility and high temperature water of 110 ~ 120 ℃ is supplied. To prevent boiling, it is mixed with low temperature water of 50 ~ 65 ℃ stored in the bottom of the storage tank, and high temperature water of 98 ℃ is stored.

However, in such a storage tank, there is a problem that energy loss occurs because the hot water of 110 to 120 ° C and the low temperature water of 50 to 65 ° C are directly mixed.

In order to solve such a problem, the present applicant has filed and registered a thermal storage tank power generation apparatus using a thermoelectric module heat exchanger, which is disclosed in Korean Patent Registration No. 10-0393394.

1, a thermal storage tank power generation apparatus 100 using the thermoelectric module heat exchanger includes a thermal storage tank 110, a cogeneration facility 120, a thermoelectric module heat exchanger 130, a first control valve 140 A second control valve 150, a third control valve 160, and a controller 170. The first control valve 150,

First, the thermal storage tank 110 is connected to the district heating supply pipe 101 and the district heating return pipe 103. Hot water of 98 占 폚 is stored at the upper end and low temperature water of 50 to 65 占 폚 is stored at the lower end.

The cogeneration facility 120 supplies the self-produced hot water of 110 to 120 ° C to the heat storage tank 110 or the district heating supply pipe 101.

The thermoelectric module heat exchanger 130 is a conventional thermoelectric module heat exchanger which is disclosed in U.S. Patent No. 5,226,298 and No. 10-251329 and is supplied from the cogeneration facility 120 or the heat storage tank 110 And the low-temperature water supplied from the heat-storage tank 110 or the district heating-recovery pipe 103, and heat-exchanges the heat to generate electric energy.

The first control valve 140 is installed between the cogeneration generating facility 120 and the thermoelectric module heat exchanger 130 and the district heating supply pipe 101 and is controlled by the controller 170, do.

The second control valve 150 is installed between the thermoelectric module heat exchanger 130 and the heat storage tank 110 and the district heating return pipe 103 to change the flow path under the control of the controller 170.

The third control valve 160 is installed between the cogeneration generation facility 120 and the district heating recovery pipe 103 at the rear end of the second control valve 150 and changes the flow rate under the control of the controller 170 .

In addition, the controller 170 controls the first to third control valves 140 to 160 to generate electric power through the thermoelectric module heat exchanger 130 according to the mode. The controller 170 controls the first to third control valves 140 to 160 to supply the hot water of the cogeneration generating facility 120 to the district heating supply pipe 101 in the heat supply mode, Temperature water recovered from the cogeneration system 120 is recovered to the cogeneration facility 120 and the hot water of the cogeneration plant 120 is supplied to the storage tank 110 through the thermoelectric module heat exchanger 130 during the storage mode, 110 to the cogeneration facility 120 and supplies the hot water of the thermal storage tank 110 to the district heating supply pipe 101 through the thermoelectric module heat exchanger 130 in the heat radiation mode, The hot water of the storage tank 110 is supplied to the district heating supply pipe 101 through the thermoelectric module heat exchanger 130 in the power generation mode, The low temperature water recovered from the recovery pipe (103) is passed through the thermoelectric module heat exchanger (130) It is recovered in crude 110.

The controller 170 connects the high temperature water side of the cogeneration power generation facility 120 and the thermoelectric module heat exchanger 130 to the first control valve 140 when the heat is accumulated in the thermal storage tank power generation apparatus 100 using the thermoelectric module heat exchanger, The second control valve 150 and the third control valve 160 connect the low temperature water side of the cogeneration power generation facility 120 and the thermoelectric module heat exchanger 130 to each other.

The high temperature water produced in the cogeneration facility 120 is supplied to the heat storage tank 110 through the thermoelectric module heat exchanger 130 and the low temperature water of the heat storage tank 110 is supplied to the cogeneration facility 120, respectively.

As a result, the high temperature water and the low temperature water are heat-exchanged in the thermoelectric module heat exchanger 130 so that the temperature of the high temperature water supplied to the heat storage tank 110 is lowered and stored, and electricity is produced by the energy generated during heat exchange

The controller 170 connects the thermoelectric module heat exchanger 130 and the district heating pipe 101 to the first control valve 140 when generating electricity in the thermal storage tank power generation apparatus 100 using the thermoelectric module heat exchanger The second control valve 150 and the third control valve 160 connect the thermoelectric module heat exchanger 130 and the district heating return pipe 103 to each other.

In this state, when the thermal storage tank 110 starts to radiate heat and the hot water is discharged, the hot water is discharged to the local heating supply pipe 101 through the thermoelectric module heat exchanger 130, and the low temperature water of the local heating return pipe 103 And is returned to the heat storage tank 110 through the thermoelectric module heat exchanger 130.

As a result, heat is exchanged between the high temperature water and the low temperature water in the thermoelectric module heat exchanger 130, and electricity is generated by the energy generated during heat exchange.

However, in the heat storage tank power generation apparatus using the conventional thermoelectric module heat exchanger, the hot water and the low temperature water are indirectly heat-exchanged in the thermoelectric module heat exchanger during the heat storage, the temperature of the hot water is lowered and stored in the heat storage tank, and the low temperature water of the heat storage tank It is difficult to maintain the temperature of the hot water at a constant level, and since only one thermoelectric module heat exchanger is installed, there is a problem that the power generation efficiency is relatively lowered.

Korean Patent Registration No. 10-1418002

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an evaporator of an organic Rankine cycle connected to a district heating supply pipe, a condenser of an organic Rankine cycle connected to a district heating recovery pipe, In the hot water and district heating recovery pipes, the power is recovered by using the district heating recovery water recovered to the cogeneration facility, and the temperature of the hot water is firstly lowered and the low temperature water of the heat storage tank is directly mixed with the hot water, The temperature of the high temperature water is lowered to a certain temperature by the car, and electricity is generated by the organic Rankine cycle by utilizing the heat of the high temperature water by storing it in the heat storage tank. The temperature of the high temperature water is lowered to a certain temperature, A pressure-storage type heat storage tank for maximizing the energy efficiency by supplying and recovering the heat recovery water To provide an organic Rankine cycle power system can take advantage of its purpose.

Another object of the present invention is to provide an organic Rankine cycle power generation system using an atmospheric-pressure storage tank for increasing the power generation efficiency by connecting a plurality of organic Rankine cycles to a district heating supply pipe and a district heating recovery pipe in series or in parallel have.

According to an aspect of the present invention,

A cogeneration facility for discharging self-produced hot water to a district heating supply pipe; The hot water is supplied from the cogeneration power generation facility through the district heating supply pipe and the hot water is stored at the upper end of the district heating supply pipe. Temperature water in which low-temperature water is stored; A first branch which supplies the district heating recovery number of the district heating recovery pipe to the local heating recovery pipe after supplying the local heating recovery number to the organic Rankine cycle; An organic Rankine cycle in which hot water supplied from the cogeneration facility and the district heating recovery water supplied from the first branch are heat-exchanged with the working fluid to produce electric energy by energy generated during heat exchange; A second branch pipe for discharging low-temperature water discharged from the heat storage tank to the district heating supply pipe or the district heating return pipe; A temperature sensor positioned between the heat storage tank and the second branch on the district heating supply pipe; A first electronic control valve installed between the district heating recovery pipe and the first branch pipe and varying a flow path according to an external control; A second electronic control valve installed on the second branch pipe and varying a flow path and a flow rate according to an external control; And supplying the local heating water recovery number of the first branch pipe to the organic Rankine cycle through flow control of the first electronic control valve to produce electrical energy, and when the temperature of the high temperature water sensed by the temperature sensor is not less than a predetermined temperature And a controller for controlling the second electronic control valve to mix the low temperature water of the storage tank with the hot water of the district heating supply pipe through the flow path and the flow rate control to keep the temperature of the hot water stored in the storage tank constant. .

Here, the first branch pipe is provided with a third electromagnetic control valve for replenishing the loss flow rate on the pipeline.

Here, the organic Rankine cycle may further include an evaporator connected to a district heating pipe connected to the heat storage tank in the cogeneration facility; A condenser connected to the district heating recovery pipe connected to the cogeneration facility in the heat storage tank; A pump installed between the condenser and the evaporator; And a turbine provided between the evaporator and the condenser and having a generator.

Here, the organic Rankine cycle may be installed alone, or two or more of them may be installed in series or in parallel.

Here, the organic Rankine cycle may be such that, in the parallel installation, the third branch is branched from the district heating supply pipe and connected to the evaporator of any organic Rankine cycle, and the fourth branch is branched from the first branch, And fourth and fifth electronic control valves are respectively installed in the third and fourth branch engines so as to be selectively driven under the control of the controller.

Here, the first and second electromagnetic control valves are three-way valves.

According to the organic Rankine cycle power generation system utilizing the atmospheric-pressure storage tank according to the present invention, the evaporator of the organic Rankine cycle is connected to the district heating supply pipe, the condenser of the organic Rankine cycle is connected to the district heating recovery pipe In the cogeneration power plant, the high temperature water discharged to the storage tank and the district heating recovery water recovered to the cogeneration facility in the district heating recovery pipe are used for power generation, while the temperature of the hot water is firstly lowered, The temperature of the hot water is secondarily lowered to a predetermined temperature and stored in the heat storage tank, thereby generating electricity by the use of the heat of the hot water to generate electricity, and the temperature of the hot water is lowered to a predetermined temperature, , By supplying the district heating recovery water to the condenser of the organic Rankine cycle and cooling it, A it can be maximized.

In addition, according to the present invention, a plurality of organic Rankine cycles can be connected in series or in parallel to a district heating supply pipe and a district heating return pipe, thereby enhancing power generation efficiency.

1 is a block diagram showing a configuration of a storage tank power generation apparatus using a conventional thermoelectric module heat exchanger.
FIG. 2 is a systematic diagram showing a configuration of an organic Rankine cycle power generation system utilizing a pressure-controlled type heat storage tank according to the present invention.
FIG. 3 and FIG. 4 are schematic diagrams showing a configuration of an organic Rankine cycle power generation system utilizing a pressure-controlled type heat storage tank according to another embodiment of the present invention.
5 and 6 are explanatory diagrams for explaining modes of the organic Rankine cycle power generation system utilizing the atmospheric pressure type heat storage tank according to the present invention.

Hereinafter, the structure of the organic Rankine cycle power generation system utilizing the atmospheric pressure type storage tank according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

FIG. 2 is a system diagram showing the configuration of an organic Rankine cycle power generation system utilizing the atmospheric pressure type heat storage tank according to the present invention, and FIGS. 3 and 4 are diagrams showing an organic Rankine cycle power generation system using an atmospheric pressure type heat storage tank according to another embodiment of the present invention. Fig.

2 to 4, the organic Rankine cycle power generation system 1 using the atmospheric pressure type heat storage tank according to the present invention includes a cogeneration facility 10, a heat storage tank 20, a first branch pipe P1, A second temperature sensor T and a first electronic control valve V1 and a second electronic control valve V2 and a controller 40 as shown in FIG. . In the figure, VS is a three-way electromagnetic control valve which discharges hot water discharged from the cogeneration facility 10 to the heat storage tank 20 and the DHS by controlling the central system.

First, the cogeneration facility 10 supplies the self-produced high-temperature water of 115 ° C to the user facility or the storage tank 20 through the district heating supply pipe 101.

The heat storage tank 20 is connected to the DHS and the DHR. The hot water of 98 ° C is stored at the upper end and the low temperature water of 45 ° C is stored at the lower end. At this time, the heat storage tank 20 discharges the stored warm water to the DHS and discharges the stored low temperature water to the DHS or the DHR.

In addition, the first branch pipe (P1) supplies the district heating recovery number of the district heating recovery pipe (DHR) to the organic Rankine cycle (30) to be described later, and then to the district heating recovery pipe (DHR). Here, the first branch pipe P1 is provided with a third electromagnetic control valve V3 for replenishing the loss flow rate on the pipeline.

The organic Rankine cycle 30 is a cycle in which the hot water discharged from the cogeneration generating facility 10 and the district heating return water of the DHR supplied through the first branch pipe P1 are heat- To produce electrical energy from energy generated during heat exchange. The organic Rankine cycle 30 includes an evaporator 31 connected to a district heating supply pipe DHS connected to the heat storage tank 20 in the cogeneration facility 10 and connected to the first branch pipe P1, A pump 33 installed between the condenser 32 and the evaporator 31 to pressurize the working fluid and a pump 33 provided between the evaporator 31 and the condenser 32 and connected to the generator 35, And a turbine 34 driven by a working fluid discharged from the evaporator 31. Here, also, the organic Rankine cycle 30 may be installed alone or two or more as shown in Figs. 3 and 4 may be installed in series or in parallel. In the case of parallel installation, as shown in Fig. 4, The third branch pipe P3 is branched from the supply pipe DHS to be connected to the evaporator 31 of the optional organic Rankine cycle 30 and the fourth branch pipe P4 is branched from the first branch pipe P1 And the fourth and fifth electronic control units P3 and P4 are respectively connected to the third and fourth branch pipes P3 and P4 so as to be selectively driven according to the control of the controller 40. The condenser 32 is connected to the condenser 32 of the optional organic Rankine cycle 30, Install valves V4 and V5.

Subsequently, the second branch pipe (P2) discharges the low-temperature water discharged from the heat storage tank (20) to the district heating supply pipe (DHS) or the district heating return pipe (DHR).

The temperature sensor T is positioned between the heat storage tank 20 and the second branch pipe P2 on the district heating supply pipe DHS and measures the temperature of the hot water and outputs the measured temperature to the controller 40. [

On the other hand, the first electronic control valve V1 is installed between the DHR and the first branch pipe P1 to change the flow path under the control of the controller 40. [

The second electromagnetic control valve V2 is installed on the second branch pipe P2 and changes the flow path and the flow rate under the control of the controller 40. [

The controller 40 supplies the local heating recovery number of the first branch pipe P1 to the organic Rankine cycle 30 through the flow control of the first electronic control valve V1 to produce electrical energy, (DHS) or the district heating return pipe (DHR) by controlling the second electronic control valve (V2) according to the temperature of the hot water sensed from the temperature sensor (T) When the temperature of the hot water exceeds 98 DEG C, the DHS of the DHS is mixed with the low temperature water of the DHS 20, and the DHS of 98 DEG C is stored in the heat storage tank 20.

Hereinafter, the structure of the organic Rankine cycle power generation system utilizing the atmospheric pressure type storage tank according to the present invention will be described in detail with reference to the accompanying drawings.

"Heat storage mode"

Referring to FIG. 5, the controller 40 operates the organic Rankine cycle 30 so that the hot water produced in the cogeneration facility 10 is discharged to the DHS and the thermal storage tank 20.

The controller 40 controls the direction of the second electronic control valve V1 so that the low temperature water in the heat storage tank 20 is discharged to the district heating supply pipe DHS.

Subsequently, the controller 40 controls the flow rate of the second electronic control valve V2 according to the temperature of the high temperature water sensed by the temperature sensor T, thereby controlling the amount of low temperature water of the storage tank 20 mixed with the high temperature water Temperature water at 98 ° C is stored in the heat storage tank 20 at all times.

At this time, power is not generated because the organic Rankine cycle 30 is not operated.

"Power generation mode"

6, the controller 40 controls the direction of the first electronic control valve V1 so that the district heating recovery number of the district heating recovery pipe (DHR) flows through the first branch pipe P1 to the organic Rankine cycle To the condenser (32) of the evaporator (30).

Then, the high temperature water of the DHS is supplied to the evaporator 31 of the organic Rankine cycle 30, and the pump 33 (33) is supplied with the local heating recovery number of the first branch P1 being supplied to the condenser 32 Is operated to circulate the working fluid, the turbine 34 is rotated and electric power is generated in the generator 35.

On the other hand, the hot water discharged from the evaporator (31) of the organic Rankine cycle (30) is discharged to the storage tank (20).

The controller 40 controls the direction of the second electronic control valve V2 so that the low temperature water in the storage tank 20 is discharged through the second branch pipe P2 to the DHR.

Subsequently, the controller 40 senses the temperature of the high-temperature water through the temperature sensor T.

When the temperature of the hot water exceeds 98 DEG C, the controller 40 changes the flow path of the second electronic control valve V1 so that the thermal storage tank 20 and the district heating supply pipe DHS are connected to each other, ) Is mixed with the hot water so that the middle temperature water of 98 占 폚 is stored in the heat storage tank 20.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

10: Heat and power generation facility 20: Heat storage tank
30: Organic Rankine Cycle 40: Controller

Claims (6)

A cogeneration facility for discharging self-produced hot water to a district heating supply pipe;
The hot water is supplied from the cogeneration power generation facility through the district heating supply pipe and the hot water is stored at the upper end of the district heating supply pipe. Temperature water in which low-temperature water is stored;
A first branch which supplies the district heating recovery number of the district heating recovery pipe to the local heating recovery pipe after supplying the local heating recovery number to the organic Rankine cycle;
An organic Rankine cycle in which hot water supplied from the cogeneration facility and the district heating recovery water supplied from the first branch are heat-exchanged with the working fluid to produce electric energy by energy generated during heat exchange;
A second branch pipe for discharging low-temperature water discharged from the heat storage tank to the district heating supply pipe or the district heating return pipe;
A temperature sensor positioned between the heat storage tank and the second branch on the district heating supply pipe;
A first electronic control valve installed between the district heating recovery pipe and the first branch pipe and varying a flow path according to an external control;
A second electronic control valve installed on the second branch pipe and varying a flow path and a flow rate according to an external control; And
Wherein the control unit controls the flow rate control of the first electronic control valve to supply the local heating recovery number of the first branch pipe to the organic Rankine cycle to produce electric energy, and when the temperature of the high temperature water sensed by the temperature sensor is equal to or higher than a predetermined temperature, And a controller for controlling the second electronic control valve to mix the low temperature water of the storage tank with the hot water of the district heating supply pipe through the flow path and flow rate control to keep the temperature of the hot water stored in the storage tank constant. An organic Rankine cycle power generation system using an atmospheric pressure storage tank. The method according to claim 1,
Wherein the first branch pipe comprises:
And a third electronic control valve for supplementing the loss flow rate on the pipeline. The method according to claim 1,
The organic Rankine cycle may comprise:
An evaporator connected to a district heating pipe connected to the heat storage tank in the cogeneration facility;
A condenser connected to the district heating recovery pipe connected to the cogeneration facility in the heat storage tank;
A pump installed between the condenser and the evaporator; And
And a turbine provided between the evaporator and the condenser and having a generator, wherein the turbine is an organic Rankine cycle power generation system utilizing the atmospheric-pressure storage tank. The method of claim 3,
The organic Rankine cycle may comprise:
Wherein at least two of the atmospheric-pressure storage tank are installed in series or in parallel. 5. The method of claim 4,
The organic Rankine cycle may comprise:
The third branch is branched from the district heating supply pipe at the time of parallel installation and connected to the evaporator of an arbitrary organic Rankine cycle and the fourth branch is branched from the first branch and the condenser of any organic Rankine cycle is connected And fourth and fifth electronic control valves are respectively installed in the third and fourth branch engines so as to be selectively driven under the control of the controller. The method according to claim 1,
Wherein the first and second electromagnetic control valves comprise:
Wherein the three-way valve is a three-way valve.
KR1020150090408A 2015-06-25 2015-06-25 Organic rankine cycles generation system utilizing heat storage tank of atmospheric pressure KR101619441B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
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RU2674060C1 (en) * 2018-03-14 2018-12-04 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") Heating point of system of heating and hot water supply
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2674060C1 (en) * 2018-03-14 2018-12-04 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") Heating point of system of heating and hot water supply
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