KR20180042985A - Trigeneration system - Google Patents

Trigeneration system Download PDF

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Publication number
KR20180042985A
KR20180042985A KR1020160135683A KR20160135683A KR20180042985A KR 20180042985 A KR20180042985 A KR 20180042985A KR 1020160135683 A KR1020160135683 A KR 1020160135683A KR 20160135683 A KR20160135683 A KR 20160135683A KR 20180042985 A KR20180042985 A KR 20180042985A
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KR
South Korea
Prior art keywords
cooling
heating
heat
compressor
power
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KR1020160135683A
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Korean (ko)
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KR101960572B1 (en
Inventor
김형태
윤덕순
최용운
조영아
채정민
한정옥
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한국가스공사
주식회사 엑시언
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Publication of KR20180042985A publication Critical patent/KR20180042985A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02Plants 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
    • F01K23/06Plants 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 combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10Plants 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 combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/12Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engines being mechanically coupled
    • F01K23/14Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engines being mechanically coupled including at least one combustion engine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00Machines, plants or systems, using particular sources of energy
    • F25B27/02Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/02Heat pumps of the compression type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B7/00Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/14Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/46Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

Abstract

The present invention relates to a triple power generation system. In the triple power generation system according to the present invention, a generator and a cooling/heating apparatus are separately detachably connected to a gas engine, so that only the generator, the cooling/heating apparatus, or both can be operated. That is, since the present invention can freely adjust power generation and a cooling/heating ratio, the present invention can flexibly respond to various energy demand patterns of consumers.

Description

TRIGENERATION SYSTEM [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cogeneration system, which is one of distributed generation systems, and particularly to a triple generation system capable of generating electricity, cooling and heating.

Distributed generation, which has become a recent issue, is a power generation system that distributes small power generation sources around power demand sites unlike existing large-scale centralized power generation. Centralized power generation is a way to supply electricity generated by large-scale hydropower hydropower plants to homes or buildings through the transmission plan that is spread throughout the country, while distributed power generation has electricity generation facilities in plant or building units, It can be understood as a way of developing itself.

Distributed generation has several advantages over centralized generation. First, distributed power generation is located near the demand site, and construction cost and operating cost of the transmission and distribution infrastructure needed to supply electricity to the demand site are greatly reduced. In the case of centralized power generation, there is an advantage that power loss occurs in the transmission and distribution process and loss due to so-called 'reactive power' is considerable, while in case of distributed power generation, such loss is not generated.

The second advantage of distributed generation is that it does not incur the cost and complaint problems associated with the construction of large power plants and transmission line infrastructures. In particular, the construction of a nuclear power plant with high efficiency during centralized power generation can be difficult to select a candidate for a power plant, and a hydroelectric power plant can be checked by an environmental protection group. In the case of high-voltage transmission lines, complaints are often the subject of complaints. Distributed generation is free from these complaints.

 A third advantage is that the reliability of the power system can be increased. Centralized power generation supplies power through the broadband transmission forecast. If the total demand and supply are temporarily within the transmission forecast, mutual imbalance can cause the entire grid to collapse and cause a wide-area power outage. Even in distributed power generation, grid network collapse may occur due to mismatch of power demand and supply, but it is possible to prevent wide-area power outage because only the grid network in the region collapses.

The fourth advantage is that it can utilize the arrays from the engine / turbine to achieve high energy efficiency.

A typical example of distributed generation is cogeneration. The cogeneration system generates electric power by driving the generator with the power generated by burning the gas in the gas engine. In this case, the heat of the exhaust gas discharged after combustion and the cooling water arrangement that has been thrown away by the engine cooling water are recovered by the heat exchanger and used for cooling and heating through the absorption type cold and hot water heater. Especially, Trigeneration.

An existing triple power generation system is shown in Fig.

Referring to FIG. 1, a gas engine receives gas fuel and converts it into power, and the generator receives power from the gas engine to produce electric power.

Some of the energy of the fuel is converted from the gas engine to energy for power generation, and the remainder is in the form of thermal energy of the engine coolant and the exhaust gas after combustion.

Gas engine Cooled hot water and exhaust gas type are sent to the absorption type cold / hot water generator for cooling in summer and for heating in winter. The problem with such a conventional triple power generation system is that the heat energy required for the absorption type cold / hot water heater is dependent on the power generation amount. In other words, when the power consumption (power generation) is small, the heat energy produced is also reduced. Therefore, if the heating and cooling demand adds to the supply, it is necessary to perform the power generation unnecessarily or to provide separate heating and cooling facilities.

Demand patterns for energy demand vary widely. For example, buildings with dense offices have a higher demand for electricity than those for heating and cooling. Conversely, in hotels and hospitals, demand for air-conditioning and heating is greater than electricity demand. Electricity and heating and cooling may be required at similar levels. However, existing triple power generation systems can not flexibly respond to various energy demand patterns of consumers, and there is a problem that mainly focuses on power generation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a triple-power generation system in which the structure of energy can be flexibly changed between power, cooling energy, There is a purpose.

On the other hand, other unspecified purposes of the present invention will be further considered within the scope of the following detailed description and easily deduced from the effects thereof.

In order to accomplish the above object, the present invention provides a triple power generation system including: a gas engine for supplying a gas and burning it and converting the power into a rotary power; A generator detachably connected to the gas engine by a first power control unit to selectively generate power; A cooling / heating device of a vapor compression type detachably connected to the gas engine by a second power control unit to perform cooling or heating; An arrangement recovery device for recovering heat of exhaust gas of the gas engine; And an arrangement utilizing device for converting the energy of the gas engine into energy using the arrangement recovered by the arrangement recovery device, wherein the power generated by the gas engine is fluidly converted to energy of at least one of electric power energy, cooling energy and heating energy It is characterized by what is possible.

According to the present invention, the arrangement utilizing apparatus may be an ORC (Organic Rankine Cycle) for power generation, or an absorption chiller or an array driving dehumidification cooling apparatus for cooling and heating.

In one embodiment of the present invention, the cooling and heating device comprises: a compressor detachably connected to the gas engine by the second power control unit to compress the refrigerant; and a heat exchanger connected to the compressor and performing heat exchange between the refrigerant and the air A second heat exchanger connected to the compressor for performing heat exchange between the refrigerant and the cooling and heating fluid and an expansion valve disposed between the first heat exchanger and the second heat exchanger for expanding the refrigerant And the refrigerant flows from the compressor to the first heat exchanger during expansion, and the expansion valve. Heating fluid is circulated while the refrigerant is circulated through the second heat exchanger and the compressor and the refrigerant is circulated from the compressor to the second heat exchanger, the expansion valve, the first heat exchanger and the compressor at the time of heating, . .

And a water tank for storing cooling and heating fluid for cooling and heating in the second heat exchanger. The water tank is connected to an absorption type cold water heater, which is one of the arrangement utilizing devices, and is capable of storing the fluid cooled or heated in the absorption water heater.

In an embodiment of the present invention, a plurality of compressors are provided and selectively driven by the second power control unit. Also, the compressor can adjust the compression capacity between 1 and 100% through the flow rate control.

More specifically, in the present embodiment, there are two compressors, and each compressor can selectively utilize only 50% of the total compressing capacity through the flow rate control, and when the total capacity of the two compressors is 100% %, 50%, 75% and 100%. In addition, 5 ~ 100% cooling and heating capacity control is possible by adjusting the refrigerant flow rate by controlling the compressor rotation speed and valve at each stage.

On the other hand, in an embodiment of the present invention, the heat of cooling water after cooling the gas engine is transferred to the arrangement utilizing apparatus. More specifically, the cooling water is introduced into the batch recovery device, heated by the exhaust gas of the gas engine, heat-exchanged in the arrangement utilization device, and then circulated to the gas engine.

In another embodiment of the present invention, a bypass valve is provided between the exhaust heat recovery device and the exhaust heat utilization device, and the heat recovered in the exhaust heat recovery device can be selectively supplied to the first heat exchanger. In this case, however, the engine cooling water is released to the atmosphere only if no sequence recovery is required. In addition, when the outside air temperature is low during the heating operation, the air or the refrigerant is heated so that the refrigerant cycle can be efficiently operated. In addition, it is possible to take additional power generation mode time by cooling and heating the water tank by using cold / hot water in the water tank.

In the triple power generation system according to the present invention, a power mode in which only the first power control unit is connected to perform power generation only, a cooling / heating mode in which only the second power control unit is connected to perform cooling or heating only, And a hybrid mode in which both the power generation and the cooling and heating are performed together by connecting the first and second power control units to each other.

According to the present invention, a generator and a cooling / heating unit can be selectively connected to a gas engine, and the energy type can be converted and supplied according to the power, cooling / heating load ratio required in the energy demand facility.

In addition, there is an advantage that the arrangement of the engine cooling water and the exhaust gas discharged from the gas engine can be used for supplementary cooling / heating through the arrangement utilizing apparatus or can actively cope with the electric power heating and cooling load of the energy demand facility by producing electric power.

The present invention can ultimately improve the energy efficiency through the improvement of the energy utilization rate.

On the other hand, even if the effects are not explicitly mentioned here, the effect described in the following specification, which is expected by the technical features of the present invention, and its potential effects are treated as described in the specification of the present invention.

1 is a view for explaining a conventional triple power generation system.
2 is a diagram for explaining the triple power generation system in detail.
3 is a table for explaining a specific driving example of five modes that can be implemented in the present invention.
* The accompanying drawings illustrate examples of the present invention in order to facilitate understanding of the technical idea of the present invention, and thus the scope of the present invention is not limited thereto.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

Hereinafter, a triple power generation system according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram for explaining the triple power generation system in detail.

The triple power generation system according to the present invention comprises a gas engine, a generator, a cooling and heating device, an arrangement recovery device, and an arrangement utilization device.

A gas engine is a heat engine that burns gas to convert it to power. For example, a gas combustion piston engine may be used. That is, the gas is burned to drive the piston, and the reciprocating motion of the piston can be converted into rotational motion of the shaft.

The generator is selectively coupled to the gas engine. That is, the first power control unit may not be mechanically coupled to the rotational axis of the gas engine, or may not be coupled. When the generator is coupled to the rotary shaft of the gas engine, the rotary motion is produced as electric power.

The heating and cooling apparatus is for converting the power of the gas engine into cooling or heating energy. The heating and cooling apparatus is also selectively coupled to the gas engine by the second power control unit, like the generator. Unlike the existing triple power generation system, the present invention is characterized in that the cooling / heating energy is produced by directly connecting the cooling / heating device to the gas engine.

In the present invention, the cooling and heating apparatus may employ various types of refrigeration cycle and heat pump cycle. For example, the cycle system used in this embodiment includes a compressor, a first heat exchanger that performs heat exchange with air, a second heat exchanger that performs heat exchange with the cooling and heating fluid, and an expansion that is installed between the first heat exchanger and the second heat exchanger Valve.

The compressor can be coupled and disengaged by the second power control unit to the gas engine.

The case of the refrigeration cycle will be described first. The blue arrow in FIG. 2 indicates the circulation direction of the refrigerant in the refrigeration cycle.

The refrigerant in a vapor state is adiabatically compressed in the compressor and flows into the first heat exchanger through the four-way valve in a state of high temperature and high pressure. In the first heat exchanger, the refrigerant undergoes an equi-pressure cooling process. That is, as heat is transferred from the refrigerant to the air, the refrigerant is condensed while changing into a liquid state. When the cooling and heating apparatus is utilized as a cooling cycle, the first heat exchanger serves as a condenser in the refrigeration cycle. The refrigerant discharged from the first heat exchanger passes through the expansion valve and is thermally expanded to be converted into a low-temperature and low-pressure state. The refrigerant flows into the second heat exchanger and is heat-exchanged with the cooling / heating fluid. After the refrigerant is heated under equal pressure, the refrigerant flows back into the compressor to complete the cycle. In the refrigeration cycle, the second heat exchanger serves as an evaporator. The second heat exchanger performs heat exchange with the refrigerant and performs cooling of the building using the cooled fluid.

The heat pump cycle is indicated by the red arrow in FIG. 2, which forms a cycle in the opposite direction to the refrigeration cycle. That is, the refrigerant vapor which is adiabatically compressed in the compressor and has a high temperature and a high pressure is cooled under equilibrium while passing through the four-way valve and the second heat exchanger. That is, the heating / cooling fluid is heat-exchanged with the cooling / heating fluid and then is condensed to be liquid-phase. When the heating / cooling unit is used as a heat pump cycle, the second heat exchanger functions as a condenser. The building is heated using the heating / cooling fluid. The refrigerant exiting the second heat exchanger is thermally expanded in the expansion valve to become a low-temperature and low-pressure state. The refrigerant passes through the first heat exchanger, receives heat from the air, changes into a refrigerant vapor state, and flows into the compressor. In the heat pump cycle, the first heat exchanger serves as an evaporator.

That is, in the refrigeration cycle, the first heat exchanger serves as a condenser, the second heat exchanger serves as an evaporator, and conversely, when utilized as a heat pump cycle, a first heat exchanger serves as an evaporator and a second heat exchanger serves as a condenser. The refrigeration cycle and the heat pump cycle are already well-known technologies and will not be described in further detail.

In the present invention, the use of the cooling / heating apparatus as the refrigeration cycle or the heat pump cycle is determined by the circulation direction of the refrigerant. The circulation direction of the refrigerant is controlled by the four-way valve connected to the compressor. The compressor, the first heat exchanger, the compressor and the second heat exchanger are both connected only through the four-way valve. The refrigerant from the compressor is guided from the four-way valve to the first heat exchanger or the second heat exchanger to determine the refrigeration cycle and the heat pump cycle.

The cooling / heating fluid may be used for cooling / heating immediately after heat exchange in the cooling / heating apparatus, but may be temporarily stored in the heat-treated water tank as shown in FIG. 2, and then used for cooling and heating.

Meanwhile, in the present invention, only one compressor may be used, but a plurality of compressors may be used in order to correspond to the ratio of various power loads and cooling / heating loads of a consumer. In the present embodiment, two compressors are used. Therefore, two second power control units are also provided. Two compressors may be driven together, only one compressor may be driven, or the compressor may not be driven in some cases. Hereinafter, the operation mode of the triple power generation system according to the present invention will be described again. In addition, although each compressor can use a compression capacity of 100%, the refrigerant flow rate of the system can be controlled step by step by sending part of the refrigerant vapor in the compressor discharge pipe to the compressor suction pipe through the bypass valve control installed in the compressor. In addition, it is possible to operate 5 ~ 100% compared to the rated cooling / heating capacity through the control of the compressor rotation speed.

The batch recovery apparatus is for recovering heat of a high temperature exhaust gas generated as a combustion by-product in a gas engine. It is also used to recover the heat of the heated cooling water after cooling the gas engine. The cooling water cools the gas engine to a temperature of about 70 to 90 ° C. And the exhaust gas of the gas engine is at a high temperature of approximately 400 to 600 ° C. In the batch recovery device, the cooling water is heated and heated by the exhaust gas, and then circulated along the route indicated by A1 in Fig. That is, the heated cooling water flows into the arrangement utilizing device and is utilized as thermal energy. The cooling water is circulated through the heat transfer process in the arrangement utilizing apparatus and then returned to the gas engine. The exhaust gas is discharged to the outside after heat transfer in the batch recovery device.

However, a three-way valve is provided between the array recovery device and the array utilization device, and the cooling water can be circulated along the route indicated by A2 in Fig. 2 without sending the cooling water to the arrangement utilization device. In the first heat exchanger, when the cooling / heating device is used as a heat pump cycle in winter, the refrigerant must absorb heat from the air in the first heat exchanger. However, when the outdoor air temperature is low, the refrigerant can not receive sufficient heat. That is, the heating capability can be reduced. In this arrangement, the cooling water is bypassed to the first heat exchanger through the three-way valve through the three-way valve, and heat is transferred to the refrigerant so that the refrigerant can be heated to a high temperature. The cooling water is again returned to the gas engine and circulated.

Meanwhile, although the refrigerant can be heated as described above, a method of increasing the efficiency by increasing the compression ratio of the refrigerant cycle by heating the air directed to the evaporator is also applicable.

In the example described above, the cooling water itself acts as a heat transfer medium for heat transfer in the array utilization device or the first heat exchanger after heat exchange in the array recovery device. However, depending on the embodiment, a separate thermal fluid may be used instead of directly using the cooling water as the heat transfer medium. For example, in a batch recovery apparatus, a separate heat fluid may be heat-exchanged with the cooling water and the exhaust gas, and then sent to the array utilization device or the first heat exchanger to form a circulation cycle. At this time, the cooling water can be circulated in such a manner that it returns to the gas engine immediately after heat exchange in the batch recovery device.

The array utilization device is for converting heat energy recovered from the array recovery device into electric power or for cooling / heating. Organic Rankine Cycle (ORC) can be used as an array utilization device to utilize thermal energy as electric power. The organic Rankine cycle is a system that produces waste heat as electric energy, and refers to a cycle in which an organic heating medium having a higher vapor pressure than water is used as a working fluid. In the present invention, it is possible to additionally produce electric energy in the organic Rankine cycle system using the arrangement generated in the gas engine. The organic Rankine cycle is a known system and detailed description is omitted.

The dehumidifying cooling apparatus can be used in this embodiment in order to utilize the exhaust heat collecting apparatus for another cooling. The dehumidifying cooling system is a device that reduces the latent heat load in the cooling load by removing the moisture in the air introduced into the room by using the adsorbent. When the adsorbent continues to adsorb moisture, the performance deteriorates, so heat is applied to the adsorbent to remove moisture of the adsorbent I use it again. Where the arrangement can be used as a heat source to heat the adsorbent. The dehumidifying cooling apparatus is a well-known technology, and a detailed description thereof will be omitted.

In order to use the arrangement utilizing device for cooling and heating, an absorption type cold / hot water heater can be used in this embodiment. The absorption type cold and hot water heater is a device that performs cooling and heating while using water as a refrigerant and cycling using lithium bromide as a desiccant. A cooling tower as shown in Fig. 2 is installed to utilize the absorption type cold / hot water heater. The absorption-type cold / hot water heater can further heat or cool the cooling / heating fluid by utilizing an absorption type cold / hot water generator having the arrangement generated from the gas engine as a heat source. The cooling / heating fluid may be used to perform direct cooling and heating, and may be temporarily stored in a heat-treated water tank, as shown in FIG. 2, and then utilized. The absorption type cold / hot water heater is a known device, and a detailed description thereof will be omitted.

The most significant structural feature of the triple power generation system according to the present invention described above is that the compressor for cooling and heating is directly connected to the gas engine. In the conventional system, only the generator is directly connected to the gas engine and the cooling and heating is performed using the arrangement from the generator. In other words, power generation has priority and additional cooling and heating is performed by using waste heat as a byproduct of power generation. However, as described above, since the energy consumption pattern of the consumer is various, the ratio between the cooling / heating load and the power load must be matched to the pattern of the consumer. In the present invention, the generator and the compressor are directly coupled to the gas engine so that the power and cooling / heating ratio can be adjusted to a desired ratio.

Accordingly, in the triple power generation system according to the present invention, the system can be operated in five modes according to energy usage patterns.

3 is a table for explaining five modes that can be implemented in the present invention.

Referring to FIG. 3, there are five modes for operating the three-phase power generation system in the present invention are the cooling mode, the heating mode, the cooling-power generation mode, the heating-power generation mode, and the power generation mode.

In Fig. 3, it is assumed that the engine power efficiency is 32%, the cooling COP is 3, and the heating COP is 4, and the generator efficiency is 90% and the total efficiency (power efficiency + arrangement number) is 88%. It is also assumed that the compressor demand power is assumed to be 75% of the maximum engine output (only 75% of the actual maximum output is used by the compressor), and the heating and cooling cycle assumes the same temperature condition. For example, when the engine power is 100 kW at 1800 rpm, the power required for the compressor is 75 kW. Therefore, even if the compressor is operated 100% in the cooling-power generation and heating-power generation mode, unlike the cooling / heating operation mode, there is a remaining power and the power generation is possible.

The operating conditions of the mode will be described in more detail.

In the cooling mode and the heating mode, the generator is not combined with the gas engine, but only the compressor is combined with the gas engine. The array utilization device maintains the operating state in all five modes.

In the cooling mode in the present embodiment, the gas engine converts the input energy (gas fuel) 100 into power. This power drives the refrigerant compressor of the vapor compression type refrigeration cycle to produce the heat in the evaporator and the heat in the condenser, and at the same time the engine arrangement also occurs. The cooling mode does not only produce cold heat, but also produces two rows of heat and arrangement in the condenser.

In the heating mode, the generator does not operate as in the cooling mode but uses only the cooling and heating device and the array utilizing device. The heating / cooling device operates in a heat pump cycle to generate heating heat. In the arrangement utilizing device, it is also possible to use an arrangement immediately, use an absorption type cold / hot water generator, drive an array power generation device, or heat a refrigerant when the outside air temperature is low, Lt; / RTI >

Of course, in the cooling mode and the heating mode, some of the power can be produced by using the array utilization device.

Both the cooling mode and the heating mode are prepared for cases where the cooling / heating load is very large in the energy demand pattern. However, it is common for power generation and heating and cooling to occur at the same time. Therefore, it is important to carry out both cooling and heating and power generation modes together.

In the cooling-power generation mode, both the compressor and the generator are operated. Generators generate electricity, while cooling and heating units operate in a refrigeration cycle to produce cold. Arrays can be used to produce heat for heating. The important point here is that two compressors can be used to control the cooling capacity. Two compressors are capable of compressing in two steps of 50% and 100% through logarithmic control, respectively. In addition, only one of the two compressors can be operated. Therefore, if the total compressibility of the two compressors is 100, compressibility can be adjusted in four steps of 25%, 50%, 75% and 100%. That is, when the cooling load is large, the power generation amount is reduced while operating at 75% and 100%, and when the power load is large and the cooling load is small, the compressor can be operated at 25% and 50% to cope with the energy pattern.

The power generation-heating mode is the same as above. Activate both the generator, the heating and cooling unit and the array utilization unit. The heating / cooling unit operates as a heat pump cycle to generate heating heat. In this case, it is possible to actively cope with the heating load and the power load by adjusting the compression capacity to four levels through selective use of the two compressors and algebraic control.

Finally, the power generation mode is the state where only the generator is running and the cooling and heating device is not operating. Of course, the array utilization device can be operated to generate additional power, or to cope with a slight heating and cooling load. It is a mode against large power load.

In the triple power generation system according to the present invention, the cooling, heating, and power generation capacities are about 50 to 130 kW, 50 to 150 kW, and 20 to 100 kW, respectively, and the capacity of the gas engine can be set accordingly.

As described above, according to the present invention, unlike the existing triple-power generation, the ratio of the low-power production and the cooling / heating energy production can be freely adjusted, and thus it is possible to actively cope with various energy consumption patterns of the user.

In addition, the basic advantages of cogeneration, namely the arrangement of the ene, can be used to selectively perform additional power generation or cooling and heating.

The scope of protection of the present invention is not limited to the description and the expression of the embodiments explicitly described in the foregoing. It is again to be understood that the present invention is not limited by the modifications or substitutions that are obvious to those skilled in the art.

Claims (15)

A gas engine that is supplied with gas and burns and converts the combustion engine into a rotary power;
A generator detachably connected to the gas engine by a first power control unit to selectively generate power;
A cooling / heating device detachably connected to the gas engine by a second power control unit to perform cooling or heating;
An arrangement recovery device for recovering heat of exhaust gas of the gas engine; And
And an array utilizing device that converts the array retrieved by the array retrieving device into energy,
Wherein the power generated by the gas engine is capable of being fluidly switched to energy of at least one of power energy, cooling energy, and heating energy.
The method according to claim 1,
Wherein the arrangement utilizing device is an Organic Rankine Cycle (ORC) for power generation.
The method according to claim 1,
Wherein the arrangement utilizing apparatus is an absorption type cold / hot water generator for cooling and heating.
The method according to claim 1,
The heating /
A compressor which is detachably connected to the gas engine by the second power control unit to compress the refrigerant;
A first heat exchanger connected to the compressor and performing heat exchange between the refrigerant and the air,
A second heat exchanger connected to the compressor for performing heat exchange between the refrigerant and the cooling / heating fluid,
And an expansion valve disposed between the first heat exchanger and the second heat exchanger for expanding the refrigerant,
Wherein the refrigerant from the compressor during the cooling is a first heat exchanger, an expansion valve. The second heat exchanger and the compressor, the cooling / heating fluid is cooled,
Wherein the refrigerant circulates from the compressor to the second heat exchanger, the expansion valve, the first heat exchanger, and the compressor to heat the cooling / heating fluid.
5. The method of claim 4,
Further comprising a water tank for storing cooling and heating fluid for cooling and heating in the second heat exchanger.
6. The method of claim 5,
The arrangement utilizing apparatus is an absorption type cold / hot water generating machine,
Wherein the water tank is connected to the arrangement utilizing device to store the fluid cooled or heated in the upper arrangement application device.
5. The method of claim 4,
Wherein the plurality of compressors are provided and selectively driven by the second power control unit.
5. The method of claim 4,
Wherein the compressor is capable of adjusting the compression capacity between 1 and 100% through flow control.
5. The method of claim 4,
Two compressors are provided,
Each compressor can selectively utilize only 50% of the total compression capacity through logarithmic control,
The three-phase power generation system is capable of operating in four steps of 25%, 50%, 75% and 100% when the total capacity of the two compressors is 100%.
The method according to claim 1,
And the heat of the cooling water after cooling the gas engine is transferred to the arrangement utilizing device to be heat-exchanged.
11. The method of claim 10,
Wherein the cooling water is introduced into the exhaust heat recovery device, heated by the exhaust gas of the gas engine, heat-exchanged in the exhaust heat utilization device, and then circulated to the gas engine.
The method according to claim 1,
A bypass valve is provided between the array collecting device and the array utilizing device,
And the heat recovered by the exhaust heat recovery device is selectively supplied to the first heat exchanger.
The method according to claim 1,
A power generation mode in which only the first power control unit is connected to perform power generation,
A cooling / heating mode in which only the second power control unit is connected to perform cooling or heating only,
And a hybrid mode in which both of the first power control unit and the second power control unit are connected to perform power generation and cooling and heating together.
The method according to claim 1,
Wherein the capacity of the gas engine and the compressor is determined so that power generation by the power generator is possible even when the compressor is driven so that the cooling or heating capability is maximized.
The method according to claim 1,
In the present invention, the cooling, heating and power generation capacities are 50 to 130 kW, 50 to 150 kW and 90 to 250 kW, respectively.
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KR101977048B1 (en) 2018-06-19 2019-05-10 한국가스공사 Integrated Cooling and Heating Control Method and System
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