KR101596486B1 - Domestic combined heat and power system having pump protection function - Google Patents

Domestic combined heat and power system having pump protection function Download PDF

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Publication number
KR101596486B1
KR101596486B1 KR1020140175277A KR20140175277A KR101596486B1 KR 101596486 B1 KR101596486 B1 KR 101596486B1 KR 1020140175277 A KR1020140175277 A KR 1020140175277A KR 20140175277 A KR20140175277 A KR 20140175277A KR 101596486 B1 KR101596486 B1 KR 101596486B1
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South Korea
Prior art keywords
working fluid
circulation pump
circulation
pipe
pump
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KR1020140175277A
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Korean (ko)
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송영길
조길제
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(주)거나백
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • 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
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • 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
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
    • 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
    • F01K21/00—Steam engine plants not otherwise provided for
    • 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
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • 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
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • 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
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • 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
    • F24D15/00—Other domestic- or space-heating systems
    • 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
    • F24D17/00—Domestic hot-water supply systems
    • 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
    • F24D3/00—Hot-water central heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • 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]

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The present invention relates to a home steam supply and power generation system, and more particularly, to a home steam supply and power generation system having a pump protection function. A home steam supply and power generation system according to the present invention comprises: a circulation pipe through which working fluid flows; a circulation pump which is installed in the circulation pipe for circulating the working fluid; a boiler for converting the working fluid into high temperature high pressure gas by heating the working fluid flowing through the circulation pipe; an expander which is lubricated by oil for converting an expansion force of the working fluid into a rotational force; a power generator for generating electric energy using the expander as a prime mover; and a hot water tank for converting the working fluid in a low temperature low pressure gas phase into a low temperature low pressure liquid phase by exchanging heat with the low temperature low pressure gas phase working fluid discharged from the expander and heating up stored hot water. The circulation pump comprises a discharge valve which is configured to discharge the working fluid outside the circulation pump to protect the circulation pump if an internal pressure of the circulation pump reaches a predetermined pressure and the system further comprises a retrieval pipe for connecting the discharge valve of the circulation pump and an upstream side of the circulation pipe of the circulation pump to transfer the working fluid discharged from the discharge valve to the upstream side of the circulation pipe of the circulation pump.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a domestic cogeneration system having a circulating pump protection function,

The present invention relates to a domestic cogeneration system, and more particularly, to a domestic cogeneration system having a circulation pump protection function.

The heating system of apartment complexes such as apartment complexes has central heating, district heating, and individual heating depending on the way of supplying calories to a heating place.

The central heating is a method of heating a boiler or other heat source in a basement or a separate place from which a heating medium such as steam, hot water or hot air is supplied to each home.

Local heating is a type of heating system that supplies hot water produced in a large scale heat production facility such as a cogeneration power plant and a garbage incinerator to an apartment complex in a certain area through pipelines buried underground, instead of having individual heat production facilities in apartment complexes .

Individual heating is a method in which individual heaters are used in each house to heat them individually. Individual heating can be adjusted to allow each family to heat at the desired time, and it has the advantage of paying only as much as it uses. However, since the individual heating uses a small boiler, it has a disadvantage that the heat efficiency is lowered and the fuel cost is higher than the district heating.

To solve these drawbacks, a Combined Heat and Power System with high energy efficiency has been proposed. A cogeneration system for household use is a total energy system that simultaneously produces power and heat from a single energy source. Generally, the high temperature unit is used as a power source for generating electric power and the low temperature unit is used as a heat source.

FIG. 1 is a conceptual diagram briefly showing a conventional cogeneration system for household use. 1, after heating a working fluid in a boiler 1, an inflator 2 connected to an alternator 4 is operated using a working fluid in a gaseous state at a high temperature and a high pressure to produce electricity The hot water stored in the hot water tank 3 is heated by a heat exchange method using the low-temperature and low-pressure working fluid discharged from the expander 2.

The circulation pump 5 is for circulating the working fluid along the circulation pipe. The circulation pump 5 is provided with a discharge valve or a relief valve for discharging the working fluid to the outside to prevent the circulation pump 5 from being damaged by overpressure when the pressure is higher than a set pressure. The discharge valve has a valve cap supported by a spring. When the pressure inside the circulation pump rises above a certain pressure, the valve cap supported by the spring is pushed, and the discharge port, which was closed by the valve cap, is opened and the working fluid is discharged to the outside.

Patent Registration No. 10-1389650 Patent Registration No. 10-1264249 Patent Registration No. 10-1249445 Japanese Patent Application Laid-Open No. 10-2014-0029262

In the above-described conventional cogeneration system for home use, when the working fluid is discharged to the outside in order to protect the circulation pump, the working fluid in the system may be insufficient.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cogeneration system for domestic use that can protect a circulation pump from overpressure while preventing loss of a working fluid.

According to an aspect of the present invention, there is provided a cogeneration system for household use, comprising: a circulation pipe through which a working fluid flows; a circulation pump installed in the circulation pipe for circulating the working fluid; An expander for converting the expansion force of the working fluid in the gaseous state of the high temperature and high pressure into a rotary force, and a generator for generating electric energy using the expander as a prime mover, And a hot water tank for exchanging heat with the working fluid in a gaseous state of a low temperature and a low pressure discharged from the inflator to heat the stored hot water and convert the working fluid in a low temperature and low pressure gaseous state into a low temperature and low pressure liquid state, Wherein the circulation pump is a cogeneration system for domestic cogeneration, And a discharge valve configured to discharge the working fluid to the outside of the circulation pump in order to protect the circulation pump when the pressure of the working fluid increases beyond the predetermined pressure, And a return pipe connecting the discharge valve of the circulation pump and the circulation pipe upstream of the circulation pump so as to be delivered to the pipe.

The working fluid is preferably methanol, ethanol, HFC refrigerant or HCFC refrigerant.

In order to prevent pump cavitation, it is preferable that a reservoir configured to store the working fluid is installed in the circulation pipe upstream of the circulation pump.

The oil separator is disposed downstream of the inflator and is configured to separate oil from the working fluid discharged from the inflator. The oil separated from the oil separator is bypassed to the circulation pump upstream circulation pipe or the circulation pump And an oil supply passage for supplying the oil.

In addition, a shutoff valve is provided on the upstream side and the downstream side of at least one component of the boiler, the inflator, the oil separator, the hot water tank, and the circulation pump, and the shutoff valve is provided between any one of the shutoff valves It is preferable that an outflow port is provided in the circulation pipe and an inflow port is provided in the circulation pipe between the pair of shutoff valves in which the parts are not provided. The apparatus may further include a connection pipe connecting the outlet port and the inlet port, and a pump installed in the connection pipe.

The cogeneration system for household use according to the present invention has an advantage that it can prevent the loss of working fluid and protect the circulation pump from overpressure. Further, there is an advantage that it does not take time and cost to supplement the working fluid additionally.

FIG. 1 is a conceptual diagram briefly showing a conventional cogeneration system for household use.
2 is a conceptual view briefly showing an embodiment of a cogeneration system for household use according to the present invention.
3 is a conceptual view briefly showing the inflator shown in Fig.
4 is a conceptual view briefly showing another embodiment of the cogeneration system for household use according to the present invention.
5 to 6 are conceptual diagrams schematically showing still another embodiment of the domestic cogeneration system according to the present invention.
FIG. 7 is a view for explaining a replacement method of the inflator in the embodiment shown in FIG. 6; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a cogeneration system for domestic use according to the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the width, length, thickness, etc. of components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

2 is a conceptual view briefly showing an embodiment of a cogeneration system for household use according to the present invention. 2, a domestic cogeneration system according to an embodiment of the present invention includes a circulation pipe 10 and a circulation pump 11 through which a working fluid flows, a boiler 20 for heating a working fluid, an inflator 30, A generator 39, a hot water rope 40, and a oil separator 50.

The working fluid is responsible for absorbing and releasing heat energy by temperature and phase change. The working fluid transfers heat energy while utilizing the circulation piping 10 connecting the respective components of the domestic cogeneration system to each other.

In the present invention, it is preferable to use methanol, ethanol, HFC refrigerant or HCFC refrigerant as the working fluid.

In the cogeneration system for domestic use according to the present invention, since the hot water tank 40 serves as a condenser, the condensation temperature of the working fluid must be higher than the temperature of the hot water stored in the hot water tank 40, This is because the working fluid condenses. Since the circulating pump 11 can only pump liquid, the working fluid must be condensed after expansion. When another working fluid having a low condensation temperature is used, a separate condenser other than the hot water tank 40 may be required.

The circulation pipe (10) is provided with a circulation pump (11) for circulating the working fluid. The circulation pump 11 needs oil to lubricate the circulation pump 11.

The boiler 20 includes a tank 21 in which water or oil is stored and a heating device 22 for heating the tank 21. The heating device 22 is disposed below the tank 21 and heats the tank 21 by burning fuel such as oil or gas supplied to the heating device 22. A coil type pipe 23 for heat exchange is provided in the tank 21 of the boiler 20 and the circulation pipe 10 is connected to the pipe 23.

The working fluid that has passed through the boiler 20 absorbs heat from water or oil stored in the tank 21 inside the boiler 20 and is converted into a gas of high temperature and high pressure.

The high-temperature, high-pressure working fluid in gas form flows into the inflator 30 and rotates the rotor 34 of the inflator 30. The expander 30 may be an oil-lubricated screw expander or a scroll expander that lubricates and seals with lubricating oil. When the inflator 30 is rotated, power is generated in the rotary generator 39 connected to the inflator 30. The working fluid, which consumes thermal energy in the process of rotating the inflator 30, is discharged from the inflator 30 in the form of a low-temperature and low-pressure gas.

3 is a conceptual view briefly showing the inflator shown in Fig. Referring to Figure 3, the inflator 30 includes a housing 33 and a rotor 34.

The housing 33 forms an internal space 35 divided into a working fluid inflow region 351 and a working fluid outflow region 352. The housing 33 is connected to the circulation pipe 10 on the upstream side of the inflator 30 to form an inlet 36 for supplying a working fluid in a gaseous state at a high temperature and a high pressure to the working fluid inflow region 351. The outlet 37 is connected to the waste working fluid outlet region 352 to supply the working fluid changed to the low temperature and low pressure gas state to the circulation pipe 10 on the downstream side of the inflator 30.

The rotor 34 is installed in the inner space 35 of the housing 33 and consumes thermal energy of the working fluid while rotating by the thermal energy of the working fluid in the gaseous state of high temperature and high pressure, . The rotor 34 includes a rotor 341 and a blade 342 installed along the longitudinal direction of the rotor shaft 341. [

In order for the rotor 34 to smoothly rotate, oil that maintains viscosity even under high-temperature and high-pressure conditions must be supplied to the interior of the inflator 30 together with the working fluid. The oil is supplied to the interior of the inflator (30) together with the working fluid through the inlet (36). And is discharged together with the working fluid through the outlet (37).

The rotary-type generator 39 produces electric energy using the inflator 30 as a prime mover. That is, when the inflator 30 rotates, the rotor (not shown) of the rotary generator 39 connected to the inflator 30 is rotated to generate electricity.

The oil separator (50) separates the oil from the working fluid discharged from the inflator (30). The oil separator 50 is known from the prior art and will not be described in detail. The oil separated by the oil separator 50 flows through the oil supply passage 51 for bypassing the hot water tank 40 to the circulation pump 10 upstream of the circulation pump 11 adjacent to the circulation pump 11, (11). Since the oil supply passage 51 supplies the oil from the high-pressure portion to the low-pressure portion, a separate oil supply pump is not required. Further, since the oil is recovered before being cooled by the heat exchange in the hot water tank 40 and flows into the oil supply passage 51, the oil can be easily supplied to the circulation pump 11 with sufficient fluidity. The oil passing through the circulation pump 11 is supplied to the inflator 30 again via the boiler 20 together with the working fluid.

2, the working fluid discharged from the inflator 30 passes through a coil-shaped pipe 41 provided in the hot water tank 40 in which the hot water is stored, And transfers the heat energy to the hot water in the hot water tank 40. At this time, because the oil is not contained in the working fluid, the viscosity of the oil in the coil-shaped pipe 41 is prevented from being adhered to the inner surface of the pipe 41 due to the increase in viscosity. If oil adheres to the inner surface of the pipe 41, the thermal conductivity falls, and the water stored in the hot water tank 40 can not be sufficiently transmitted.

The hot water tank 40 is connected to various loads 6 using hot water. For example, the hot water tank 40 may be connected to hot water loads 6 such as wash basin, bathtub, shower, and the like. When hot water is used in the hot water load 6, cold water is supplemented through a water pipe (not shown) connected to the hot water tank 40.

4 is a conceptual view briefly showing another embodiment of the cogeneration system for household use according to the present invention. The embodiment according to FIG. 4 is in part consistent with the embodiment shown in part in FIG. Therefore, the above description will be referred to in order to omit repetition. Wherein the same reference numerals are used for the same detail members.

A unique feature of this embodiment is that a reservoir 13 is provided on the upstream side of the circulation pump 11 to prevent pump cavitation. Pump cavitation is a phenomenon that cavitation occurs in a fluid due to a change in pressure due to a velocity change of the fluid, which causes noise, vibration, and corrosion. The reservoir 13 is provided on the upstream side of the pump, stores the working fluid, and supplies the working fluid to the pump. That is, the reservoir 13 serves as a buffer for keeping the flow rate of the working fluid supplied to the pump constant, and it is possible to prevent pump cavitation from occurring due to a change in flow rate or flow rate of the working fluid.

5 is a conceptual view briefly showing still another embodiment of the cogeneration system for household use according to the present invention. The embodiment according to FIG. 5 is in part consistent with the embodiment shown in part in FIG. Therefore, the above description will be referred to in order to omit repetition. Wherein the same reference numerals are used for the same detail members.

A unique feature of this embodiment is that it further includes a return pipe 14 connecting the circulation pump 11 and the circulation pipe 10 upstream of the upstream end of the circulation pump 11. The circulation pump 11 is provided with a discharge valve 11 for discharging the working fluid to the outside of the circulation pump 11 when excessive pressure is applied to the circulation pump 11 in order to prevent the circulation pump 11 from being damaged by excessive pressure, (11a). However, there is a problem that if the working fluid is discharged to the outside in order to protect the circulation pump 11, the working fluid in the system may become insufficient. Additional working fluid can be replenished, but it is time consuming and costly. In this embodiment, the recovery pipe 14 serves to deliver the working fluid discharged from the discharge valve 11a of the circulation pump 11 to the upstream side of the circulation pump 11 having a low pressure, instead of discharging the working fluid to the outside. The present embodiment has an advantage in that the circulation pump 11 can be protected from overpressure while preventing loss of working fluid.

6 is a conceptual view briefly showing still another embodiment of the cogeneration system for household use according to the present invention. The embodiment according to FIG. 6 partially corresponds to the embodiment shown in FIG. Therefore, the above description will be referred to in order to omit repetition. Wherein the same reference numerals are used for the same detail members.

A unique feature of this embodiment is that a shut-off valve 15 is provided on the upstream and downstream sides of the components of the system that are likely to be replaced, and any one of the shut-off valves 15 An outflow port 16 is provided in the circulation pipe 10-1 between main components and a circulation pipe 10-2 between the pair of isolation valves 15 in which the parts are not provided is provided with an inlet port 17 ) Is installed.

Examples of components that are likely to be replaced include a circulation pump 11, an inflator 30, a boiler 20, a oil separator 50, and the like. This embodiment has an advantage that parts can be easily replaced without loss of working fluid.

For example, when there is an abnormality in the inflator 30, the circulation pipe 10-1 and the inflator 30b between the shut-off valves 15b are opened by using a pair of shut-off valves 15b provided around the inflator 30. [ ) From the remaining circulation pipe (10-2). As shown in FIG. 7, the outlet port 16b and the inlet port 17 are connected to each other by using a connection pipe 19 provided with a separate pump 18. When the pump 18 is operated, the working fluid stored in the circulation pipe 10-1 and the inflator 30 between the shutoff valves 15b flows into the remaining circulation pipe 10-2 through the inlet port 17 do. When the inflator 30 is replaced and the pair of shut-off valves 15b is opened, the inflator 30 can be replaced without loss of the working fluid. Although the inflator 30 has been described as an example, it is obvious that other parts can be simply replaced by the same method.

For example, although the boiler 20 is described as having the tank 21, a boiler in which the circulation pipe 10 is directly heated without a separate tank may be used. At this time, the circulation pipe 10 at the heated position may have a fin in order to improve heat transfer efficiency.

10: Circulation piping 11: Circulation pump
13: Reservoir 14: Return piping
15: shutoff valve 16: outlet port
17: inlet port 18: pump
19: Connection piping 20: Boiler
21: tank 22: heating device
30: inflator 33: housing
34: rotor 35: inner space
351: Refrigerant inflow region 352: Waste refrigerant outflow region
36: Inlet 37: Outlet
39: generator 40: hot water tank
50: oil separator 51: oil supply passage

Claims (6)

A circulation pump installed in the circulation pipe for circulating the working fluid; a boiler for heating the working fluid flowing in the circulation pipe to convert the working fluid into a high-temperature and high-pressure gas state; A generator for generating electrical energy using the inflator as a prime mover; and a control unit for controlling the operation of the low-temperature and low-pressure gas state exhausted from the inflator And a hot water tank for performing heat exchange with the fluid to heat the stored hot water and convert the working fluid in a low-temperature and low-pressure gaseous state into a low-temperature and low-pressure liquid state,
Wherein the circulation pump includes a discharge valve configured to discharge a working fluid to the outside of the circulation pump to protect the circulation pump when the internal pressure of the circulation pump increases to a predetermined pressure or more,
Further comprising a return pipe connecting the discharge valve of the circulation pump and the circulation pipe upstream of the circulation pump so that the working fluid discharged from the discharge valve is transferred to the circulation pipe on the upstream side of the circulation pump,
Wherein a shutoff valve is provided on the upstream side and the downstream side of at least one component of the boiler, the inflator, the oil separator, the hot water tank, and the circulation pump, and one of the shutoff valves and the circulation pipe Wherein an outlet port is provided and an inlet port is provided in the circulation pipe between the pair of shutoff valves where the parts are not installed. The method according to claim 1,
Wherein the working fluid is methanol, ethanol, HFC refrigerant or HCFC refrigerant. The method according to claim 1,
Wherein a reservoir configured to store the working fluid is installed in an upstream circulation pipe of the circulation pump to prevent pump cavitation. The method according to claim 1,
An oil separator provided on the downstream side of the inflator and configured to separate oil from the working fluid discharged from the inflator;
And an oil supply passage for bypassing the hot water tank and supplying the oil separated from the oil separator to a circulation pipe upstream of the circulation pump or a circulation pump. delete The method according to claim 1,
Further comprising a connection pipe connecting the outlet port and the inlet port, and a pump installed in the connection pipe.
KR1020140175277A 2014-12-08 2014-12-08 Domestic combined heat and power system having pump protection function KR101596486B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180017754A (en) 2016-08-10 2018-02-21 한국산업기술대학교산학협력단 Domestic combined heat and power system

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KR101249445B1 (en) 2013-01-02 2013-04-09 (주)거나백 Domestic combined heat and power system
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Publication number Priority date Publication date Assignee Title
KR820000502B1 (en) * 1980-11-27 1982-04-08 손상기 Heating system with liquid compression heat
KR100848463B1 (en) * 2008-04-18 2008-07-25 이재철 Digital apparatus for genernating steam
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KR20140029262A (en) 2012-08-29 2014-03-10 가부시키가이샤 고베 세이코쇼 Power generation apparatus and control method thereof
KR101249445B1 (en) 2013-01-02 2013-04-09 (주)거나백 Domestic combined heat and power system
KR101264249B1 (en) 2013-02-27 2013-05-22 (주)거나백 Domestic combined heat and power system

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KR20180017754A (en) 2016-08-10 2018-02-21 한국산업기술대학교산학협력단 Domestic combined heat and power system

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