CN105604620B - A kind of system and method for refrigeration machine auxiliary Organic Rankine Cycle - Google Patents

A kind of system and method for refrigeration machine auxiliary Organic Rankine Cycle Download PDF

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Publication number
CN105604620B
CN105604620B CN201610130112.8A CN201610130112A CN105604620B CN 105604620 B CN105604620 B CN 105604620B CN 201610130112 A CN201610130112 A CN 201610130112A CN 105604620 B CN105604620 B CN 105604620B
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Prior art keywords
refrigeration machine
combustion engine
internal combustion
heat exchanger
rankine cycle
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CN201610130112.8A
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CN105604620A (en
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肖阁
孙方军
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Changzhou Industrial Technology Research Institute of Zhejiang University
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Changzhou Industrial Technology Research Institute of Zhejiang University
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Classifications

    • 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
    • F01K23/02Plants 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
    • F01K23/065Plants 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 the combustion taking place in an internal combustion piston engine, e.g. a diesel 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
    • F25B11/00Compression machines, plant, or systems, using turbines, e.g. gas turbines

Abstract

The invention discloses the system and method that a kind of refrigeration machine assists Organic Rankine Cycle.It wraps the first internal combustion engine, heat exchanger, expanding machine, condenser, refrigeration machine, the second internal combustion engine, pump;First internal combustion engine externally do work power generation after exhaust through heat exchanger absorb heat after be discharged, heat exchanger heating the expanded machine of working medium externally do work generate electricity after, by condenser, the second oil-engine driven refrigeration machine and be pumped back to heat exchanger.The present invention accesses Organic Rankine Cycle with oil-engine driven refrigeration machine, to improve Organic Rankine Cycle generated energy.

Description

A kind of system and method for refrigeration machine auxiliary Organic Rankine Cycle
Technical field
The present invention relates to what energy recycling device field more particularly to a kind of refrigeration machine assisted Organic Rankine Cycle to be System and its method.
Background technology
Organic Rankine Cycle (Organic Rankine Cycle, abbreviation ORC) is using low-boiling-point organic compound as the bright of working medium Agree cycle, is mainly made of heat exchanger, expanding machine, condenser, four major part of pump.Operation principle is heat transferring medium in heat exchanger Heat is absorbed from residual heat stream, generates the steam with certain pressure and temperature, and steam enters expanding machine acting to drive hair Motor or other dynamic power machines, the steam being discharged from expanding machine condense within the condenser, finally by heat exchanger is pumped back to, so Constantly cycle is gone down.It is to improve a kind of effective means of the Rankine cycle thermal efficiency to reduce delivery temperature, however final pressure and final temperature Numerical value depends on the Temperature of Working in condenser, only is difficult to be greatly lowered by condenser.
In the place of production natural gas, combustion gas is more than needed and electric power lacks, therefore on the basis that burning natural gas generates electricity Upper cooperation Organic Rankine Cycle cycle improves generated energy further using the thermal energy of burning.If however need temporarily meet an urgent need into When one step improves generated energy, cost is improved if additional purchase if an internal combustion engine generates electricity.
Invention content
That the purpose of the present invention is to provide a kind of cost investments is few, can meet an urgent need temporarily promotes the Organic Rankine Cycle of generated energy Electricity generation system will be interior using the refrigeration machine for the gas driven for carrying out natural gas liquefaction that gas field is natively configured with In the pipeline access Organic Rankine Cycle of the refrigeration machine of combustion engine driving, to realize the short-term generated energy that promoted to meet emergent demand Purpose.
The invention discloses a kind of systems of refrigeration machine auxiliary Organic Rankine Cycle power generation, including the first internal combustion engine, heat exchange Device, expanding machine, condenser, refrigeration machine, the second internal combustion engine, pump;First internal combustion engine externally does work the exhaust after generating electricity through heat exchanger It is discharged after releasing heat, the expanded machine of working medium that heat exchanger heats externally does work after power generation, passes through condenser, the second internal combustion engine drives Dynamic refrigeration machine and it is pumped back to heat exchanger.
According to a preferred embodiment of the invention, the second of the system of the refrigeration machine auxiliary Organic Rankine Cycle power generation The exhaust of internal combustion engine is discharged after heat exchanger releases heat.
The invention also discloses a kind of methods of refrigeration machine auxiliary Organic Rankine Cycle power generation, include the following steps:Heat exchange After heating exhaust gas of the working medium by the first internal combustion engine in device, the steam with certain pressure and temperature is generated, steam drives swollen It is condensed through condenser after swollen machine acting power generation;The pipeline of second oil-engine driven refrigeration machine is accessed in Organic Rankine Cycle, The condensation temperature and condensing pressure that condenser is further decreased by refrigeration machine are realized short-term with improving the Rankine cycle thermal efficiency The emergent purpose for promoting generated energy.
A kind of preferred embodiment according to the present invention, the method that refrigeration machine of the invention assists Organic Rankine Cycle power generation, packet Include following steps:
1) after heating exhaust gas of the working medium in heat exchanger by the first internal combustion engine, the steaming with certain pressure and temperature is generated Vapour, steam condense after driving expanding machine acting power generation through condenser;
2) pipeline of the second oil-engine driven refrigeration machine is accessed in Organic Rankine Cycle, is further dropped by refrigeration machine The condensation temperature and condensing pressure of low condenser, to improve the Rankine cycle thermal efficiency.
3) exhaust of the second internal combustion engine is introduced into heat exchanger and participates in Organic Rankine Cycle, further to utilize exhaust heat, Realize the short-term emergent purpose for promoting generated energy.
Compared with the prior art, the invention has the advantages that:The organic Rankine cycle power generation system cost investment of the present invention Less, it can meet an urgent need temporarily and promote generated energy, be driven using the combustion gas for carrying out natural gas liquefaction that gas field is natively configured with Dynamic refrigeration machine promotes power generation in short term by the pipeline access Organic Rankine Cycle of oil-engine driven refrigeration machine to realize Amount is to meet the purpose of emergent demand.It is carried through the invention in the place of production natural gas since combustion gas is had more than needed and electric power shortage The system and method for confession can further utilize the thermal energy of fuel gas buring, improve generated energy, reduce cost.
Description of the drawings
Fig. 1 is the structural schematic diagram that refrigeration machine assists organic Rankine cycle power generation system;
Fig. 2 is further to be generated electricity using the refrigeration machine auxiliary Organic Rankine Cycle for the I. C. engine exhaust for driving refrigeration machine work The structural schematic diagram of system.
1, first internal combustion engine in figure, 2, heat exchanger, 3, expanding machine, 4, condenser, 5, refrigeration machine, the 6, second internal combustion engine, 7, Pump.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1, the present invention provides a kind of systems of refrigeration machine auxiliary Organic Rankine Cycle power generation, including in first Combustion engine 1, heat exchanger 2, expanding machine 3, condenser 4, refrigeration machine 5, the second internal combustion engine 6, pump 7;The first externally acting power generation of internal combustion engine 1 Exhaust afterwards is discharged after heat exchanger 2 releases heat, after the expanded 3 external acting power generation of machine of the working medium that heat exchanger 2 heats, passes through Condenser 4, the refrigeration machine 5 of the second internal combustion engine 6 driving and pump 7 return to heat exchanger 2.
The method of the refrigeration machine auxiliary Organic Rankine Cycle power generation of system shown in Figure 1:The refrigeration that second internal combustion engine 6 is driven In the pipeline access Organic Rankine Cycle of machine 5, the condensation temperature and condensing pressure of condenser 4 are further decreased by refrigeration machine 5, To improve the Rankine cycle thermal efficiency, the short-term emergent purpose for promoting generated energy is realized.
As shown in Fig. 2, preferably, the exhaust of the second internal combustion engine 6 can also through heat exchanger 2 release heat after be discharged, Further to utilize exhaust heat, the short-term emergent purpose for promoting generated energy is realized.
The method of corresponding refrigeration machine auxiliary Organic Rankine Cycle power generation:
It is further by refrigeration machine 5 in the pipeline access Organic Rankine Cycle of 1 refrigeration machine 5 for driving the second internal combustion engine 6 The condensation temperature and condensing pressure for reducing condenser 4, to improve the Rankine cycle thermal efficiency.
The exhaust of second internal combustion engine 6 is introduced heat exchanger by 2 participates in Organic Rankine Cycle, further to utilize exhaust heat, Realize the short-term emergent purpose for promoting generated energy.

Claims (4)

1. a kind of system of refrigeration machine auxiliary Organic Rankine Cycle, it is characterised in that including the first internal combustion engine(1), heat exchanger(2)、 Expanding machine(3), condenser(4), refrigeration machine(5), the second internal combustion engine(6), pump(7);
First internal combustion engine(1)Gas exhaust piping and heat exchanger(2)It is connected, the first internal combustion engine(1)The externally exhaust after acting power generation Through heat exchanger(2)It is discharged after releasing heat, heat exchanger(2)The expanded machine of working medium of heating(3)Externally after acting power generation, by cold Condenser(4), the second internal combustion engine(6)The refrigeration machine of driving(5), pump(7)Return to heat exchanger(2).
2. a kind of system of refrigeration machine auxiliary Organic Rankine Cycle according to claim 1, which is characterized in that described the Two internal-combustion engines(6)Exhaust through heat exchanger(2)It is discharged after releasing heat.
3. a kind of refrigeration machine of system as described in claim 1 assists Organic Rankine Cycle method, it is characterised in that including as follows Step:
Heat exchanger(2)In working medium pass through the first internal combustion engine(1)Heating exhaust gas after, generate with certain pressure and temperature steaming Vapour, steam drive expanding machine(3)Through condenser after acting power generation(4)Condensation;
By the second internal combustion engine(6)The refrigeration machine of driving(5)Pipeline access Organic Rankine Cycle in, pass through refrigeration machine(5)Into one Step reduces condenser(4)Condensation temperature and condensing pressure realize short-term emergent promoted to improve ORC heat efficiency The purpose of generated energy.
4. a kind of method of the refrigeration machine auxiliary Organic Rankine Cycle of system as claimed in claim 2, it is characterised in that including such as Lower step:
1)Heat exchanger(2)In working medium pass through the first internal combustion engine(1)Heating exhaust gas after, generate with certain pressure and temperature Steam, steam drive expanding machine(3)Through condenser after acting power generation(4)Condensation;
2)By the second internal combustion engine(6)The refrigeration machine of driving(5)Pipeline access Organic Rankine Cycle in, pass through refrigeration machine(5)Into One step reduces condenser(4)Condensation temperature and condensing pressure, to improve ORC heat efficiency;
3)By the second internal combustion engine(6)Exhaust introduce heat exchanger participate in Organic Rankine Cycle, with further utilize exhaust heat, into One step realizes the short-term emergent purpose for promoting generated energy.
CN201610130112.8A 2016-03-08 2016-03-08 A kind of system and method for refrigeration machine auxiliary Organic Rankine Cycle Active CN105604620B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1804502A (en) * 2006-01-23 2006-07-19 杜培俭 Electricity generating, air conditioning and heating apparatus utilizing natural medium and solar energy or waste heat
CN102777240A (en) * 2012-08-14 2012-11-14 天津大学 Diesel engine exhaust gas waste heat recovery system of two-stage Rankine cycle
CN104727871A (en) * 2015-01-30 2015-06-24 华北电力大学 Organic rankine cycle-stirling engine combined cycle power generation system and application method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102242697A (en) * 2010-05-11 2011-11-16 北京智慧剑科技发展有限责任公司 Distributed-type non-tracking solar power generation and poly-generation system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1804502A (en) * 2006-01-23 2006-07-19 杜培俭 Electricity generating, air conditioning and heating apparatus utilizing natural medium and solar energy or waste heat
CN102777240A (en) * 2012-08-14 2012-11-14 天津大学 Diesel engine exhaust gas waste heat recovery system of two-stage Rankine cycle
CN104727871A (en) * 2015-01-30 2015-06-24 华北电力大学 Organic rankine cycle-stirling engine combined cycle power generation system and application method thereof

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