CN109826683A - A kind of organic Rankine cycle power generation system that can efficiently utilize cryogenic cold energy - Google Patents
A kind of organic Rankine cycle power generation system that can efficiently utilize cryogenic cold energy Download PDFInfo
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Abstract
The present invention relates to a kind of organic Rankine cycle power generation system that can efficiently utilize cryogenic cold energy, which includes working medium storage supply unit, cold energy use unit, heat energy utilization unit, generator unit.The system uses enclosed circulation mode, and it is cycle fluid that hydro carbons working medium or hydro carbons working medium mixture, which can be used, using the cryogenic cold energy of such as LNG as cold source, with seawater, solar energy, industrial exhaust heat etc. for heat source, realizes that cold energy is converted to the high efficiency of electric energy.The system can successfully manage phase-state change (gasification, liquefaction etc.) problem that cycle fluid occurs due to there is the large change of temperature, pressure in cyclic process, guarantee stability, safety and the high efficiency of organic Rankine cycle power generation system operation, there is good environmental benefit and energy-saving benefit.
Description
Technical field
The invention belongs to cold and hot energy technical field of comprehensive utilization, are related to a kind of organic Rankine cycle power generation system, specifically
Say, be it is a kind of can high efficiency using the cryogenic cold energy such as LNG organic Rankine cycle power generation system.
Background technique
Liquefied natural gas (Liquid Natural Gas, abbreviation LNG) is a kind of important energy source, it is under normal pressure
It is saved with -162 DEG C or so of temperature, a large amount of cold energy (about 830kJ/ can be released during receiving station is regasified
kg).If the cold energy is fully converted to power, one ton of releasable cold energy of LNG is equivalent to 240kWh.Work is regasified in tradition
In skill, the cooling capacity that LNG is carried is taken away by seawater or air, not only causes great energy waste, and can to surrounding sea or
The environment in area of standing causes cold pollution.Therefore, either the grade of energy or its quantity, the cold energy recycling of LNG have a high potential, return
This part energy is received with considerable economic and social benefit.
Organic Rankine Cycle (Organic Rankine Cycle) is the important way for realizing LNG cold energy use, the circulation
Electric energy can be converted by the cold energy of LNG externally to supply.The hydrocarbons such as methane, ethane can be used as circulation in Organic Rankine Cycle
Working medium, or organic mixed working fluid is used, to realize the matching of working medium freezing curve Yu LNG gasification curve, improve to LNG cold energy
Recovery efficiency.However, be cooled heat source temperature span big (- 160 DEG C of sink temperature, 20 DEG C of heat source temperature even higher), circulation
The influence of the pressure change of internal system larger (maximum pressure is up to 15bar-20bar, minimum pressure 2bar-3bar), circulation
Working medium in the process of running, the case where being easy to appear phase-state change (such as gasify, liquefy), directly influences Organic Rankine Cycle
The stability and safety of system operation.
Summary of the invention
It is in order to overcome the shortcomings of the prior art and insufficient, the present invention is intended to provide a kind of achievable cryogenic cold energy such as LNG
The organic Rankine cycle power generation system efficiently utilized.The system can cope with the phase-state change that mixed working fluid occurs in cyclic process
Problem guarantees the operation stability and high efficiency of organic Rankine cycle power generation system.
The present invention is adopted the technical scheme that by its technical problem of solution:
A kind of organic Rankine cycle power generation system that can efficiently utilize cryogenic cold energy, comprising: cold energy use unit, thermal energy benefit
With unit, Organic Rankine Cycle generator unit, which is characterized in that
-- the cold energy use unit, including low temperature cold source, cold energy use heat exchanger, cold energy working medium recyclable device, in which:
It is recycled behind the first cold side of the cold energy use heat exchanger with the cold energy working medium by pipeline the outlet of the low temperature cold source
The entrance of device is connected；
-- the heat energy utilization unit, including heat source, heat energy utilization heat exchanger, thermal energy working medium recyclable device, in which: described
The outlet of heat source passes through entrance phase of the pipeline after the hot side of the heat energy utilization heat exchanger with the thermal energy working medium recyclable device
Connection；
-- the Organic Rankine Cycle generator unit, including cycle fluid storage tank, turbine arrival end gas-liquid separator, thoroughly
Flat expanding machine, turbine outlet end gas-liquid separator, generator, in which: the turbo-expander is connect with generator drive gear, described
The second cold side of cycle fluid storage tank exported by pipeline successively through the cold energy use heat exchanger, the heat energy utilization change
It is connected behind the cold side of hot device with the entrance of the turbine arrival end gas-liquid separator；The turbine arrival end gas-liquid separator
Gaseous phase outlet is connected by pipeline with the entrance of the turbo-expander；The entrance of turbine outlet end gas-liquid separator is logical
Pipeline is crossed to be connected with the liquid-phase outlet pipeline of turbine arrival end gas-liquid separator in parallel, the export pipeline of turbo-expander,
The gaseous phase outlet of turbine outlet end gas-liquid separator, liquid-phase outlet with the hot side entrance phase of the cold energy use heat exchanger
Connection, the hot side outlet of the cold energy use heat exchanger are connected with the entrance of the cycle fluid storage tank.
Preferably, the one cold energy working medium circulating pump of outlet of the low temperature cold source and the first of the cold energy use heat exchanger
Cold side input port is connected.
Preferably, the first cold side outlet port of the cold energy use heat exchanger after a cold energy power pressure stabilizer with it is described
The entrance of cold energy working medium recyclable device is connected.
Preferably, the hot side entrance of the outlet one thermal energy working medium circulating pump and the heat energy utilization heat exchanger of the heat source
It is connected.
Preferably, the hot side outlet of the heat energy utilization heat exchanger after a thermal energy power pressure stabilizer with the thermal energy
The entrance of working medium recyclable device is connected.
Preferably, working medium circulating pump is provided on the export pipeline of the cycle fluid storage tank.
Preferably, it is provided with back liquid switch valve on the liquid-phase outlet pipeline of the turbine arrival end gas-liquid separator, it is described
Check-valves is provided on the export pipeline of turbo-expander.
Preferably, fluid infusion switch valve is provided on the turbine outlet end gas-liquid separator liquid-phase outlet pipeline.
Preferably, the cycle fluid in the Organic Rankine Cycle generator unit can be hydrocarbons and hydrocarbons
Derivative, such as methane, ethane, propane, butane, ethylene, F-11 or above-mentioned many kinds of substance mixture.
Preferably, the thermal energy working medium in the heat energy utilization unit can be water, conduction oil etc., and origin of heat can be sea
Water, solar energy, geothermal energy, industrial exhaust heat etc..
Preferably, the cold energy working medium in the cold energy use unit can be liquefied natural gas, and it is low that liquid nitrogen etc. also can be used
Warm working medium.
The organic Rankine cycle power generation system that can efficiently utilize cryogenic cold energy of the invention, working principle and concrete operations
Process are as follows:
When cycle fluid is pure refrigerant, cold source LNG, heat source are seawater, the lower liquid of working medium storage tank supply temperature
State cycle fluid enters working medium circulating pump by pipeline, cold by the second of cold energy use heat exchanger after working medium circulating pump boosts
Side entrance enters in cold energy use heat exchanger.At the same time, low temperature LNG through cold energy working medium circulating pump boosting after, by pipeline by
First cold side input port of cold energy use heat exchanger enters.The cycle fluid and LNG of low temperature liquid in cold pipeline are in cold energy use
The heat from cold energy use heat exchanger hot side cycle fluid is absorbed in heat exchanger, temperature increases.
LNG working medium after heating gasification is discharged via the first cold side outlet port of cold energy use heat exchanger, by cold energy working medium pressure
After the pressure stabilizing of power stabilizer, supplies to cold energy working medium recyclable device, complete the recycling and utilization of next step.
Cycle fluid after heating is left by the second cold side outlet port of cold energy use heat exchanger, through heat energy utilization heat exchanger
Cold side input port enters in heat energy utilization heat exchanger.At the same time, seawater is after the boosting of thermal energy working medium circulating pump, by pipeline by heat
It can be entered using the hot side entrance of heat exchanger.In heat energy utilization heat exchanger, the lower cycle fluid of temperature and temperature are higher
Seawater carries out heat exchange, and cycle fluid temperature increases, and is gasified totally, and the cold side outlet port through heat energy utilization heat exchanger leaves,
Entered in turbine arrival end gas-liquid separator by pipeline.Seawater after cooling controls pressure via thermal energy power pressure stabilizer
Afterwards, recycle and reuse is realized into thermal energy working medium recyclable device.
In turbine arrival end gas-liquid separator, cycle fluid pressure remained steady enters turbo-expander by pipeline,
Turbo-expander is pushed externally to do work, turbo-expander drives electrical power generators.Cycle fluid after acting after check-valves,
Into turbine outlet end gas-liquid separator.
Phase according to the cycle fluid of turbo-expander outlet is different, and is divided into and is all two kinds of feelings of gas phase and gas-liquid two-phase
Condition:
When the cycle fluid of turbo-expander outlet is all gas phase, fluid infusion switch valve is closed, and cycle fluid is gone out by turbine
The gaseous phase outlet of mouth end gas-liquid separator leaves, into the hot side entrance of cold energy use heat exchanger, in cold energy use heat exchanger
It absorbs the cold energy of low-temperature circulating working medium and LNG working medium in cold pipeline to cool down, completely by the hot side of cold energy use heat exchanger after liquefaction
Outlet is left, and into cycle fluid storage tank, completes a circulation.
When the cycle fluid of turbo-expander outlet is gas-liquid two-phase, fluid infusion switch valve is opened, the cycle fluid of gas phase
Left by the gaseous phase outlet of turbine outlet end gas-liquid separator, the cycle fluid of liquid phase by turbine outlet end gas-liquid separator liquid
Mutually outlet is left, and the common hot side entrance for entering cold energy use heat exchanger absorbs low in cold pipeline in cold energy use heat exchanger
Warm cycle fluid and the cooling of the cold energy of LNG working medium, are left after liquefaction by the hot side outlet of cold energy use heat exchanger, completely into work
In matter storage tank, a circulation is completed.
When cycle fluid is mixed working fluid (such as mixture of methane, ethane, propane, butane), cold source LNG, heat source are
When seawater, the lower liquid mixed working fluid of cycle fluid storage tank supply temperature enters working medium circulating pump by pipeline, through working medium
After circulating pump boosting, entered in cold energy use heat exchanger by the second cold side input port of cold energy use heat exchanger.At the same time, low temperature
LNG working medium is entered after the boosting of cold energy working medium circulating pump, through pipeline by the first cold side input port of cold energy use heat exchanger.Cold pipe
The mixed working fluid of low temperature liquid in road absorbs in cold energy use heat exchanger with LNG to be mixed from cold energy use heat exchanger hot side
The heat of working medium, temperature increase.
LNG working medium after heating gasification is discharged via the first cold side outlet port of cold energy use heat exchanger, by cold energy working medium
After the pressure stabilizing of manostat, supplies to cold energy working medium recyclable device, complete the recycling and utilization of next step.
Mixed working fluid after heating is left by the second cold side outlet port of cold energy use heat exchanger, through the cold of heat energy utilization heat exchanger
End entrance enters in heat energy utilization heat exchanger.At the same time, seawater is after the boosting of thermal energy working medium circulating pump, by pipeline by thermal energy
Entered using the hot side entrance of heat exchanger.In heat energy utilization heat exchanger, the lower mixed working fluid of temperature and the higher sea of temperature
Water carries out heat exchange, and mixed working fluid temperature increases, and because the saturation state point of methane, ethane, propane, butane is different, mixes work
Matter partial gasification.The mixed working fluid of gas-liquid two-phase leaves through heat energy utilization heat exchanger cold side outlet port, enters turbine by pipeline and enters
In the gas-liquid separator of mouth end.After seawater after cooling controls pressure via thermal energy power pressure stabilizer, returned into thermal energy working medium
Receiving apparatus realizes recycle and reuse.
In turbine arrival end gas-liquid separator, the mixed working fluid of gas-liquid two-phase realizes separation, and the mixed working fluid of gas phase is logical
Piping enters turbo-expander, and turbo-expander is pushed externally to do work, and turbo-expander drives electrical power generators.After acting
Cycle fluid is after check-valves, into turbine outlet end gas-liquid separator.Meanwhile returning liquid switch valve and opening, the mixing of liquid phase
Working medium enters turbine outlet end gas-liquid separator via pipeline.
Since mixed working fluid is gas-liquid two-phase state in turbine outlet end gas-liquid separator at this time, fluid infusion switch valve is opened,
The mixed working fluid of gas phase is left by the gaseous phase outlet of turbine outlet end gas-liquid separator, and the mixed working fluid of liquid phase is by turbine outlet end
The liquid-phase outlet of gas-liquid separator leaves, the common hot side entrance for entering cold energy use heat exchanger, in cold energy use heat exchanger
It absorbs the cold energy of low-temperature mixed working medium and LNG working medium in cold pipeline to cool down, completely by the hot side of cold energy use heat exchanger after liquefaction
Outlet is left, and into cycle fluid storage tank, completes a circulation.
When cycle fluid is used too using other pure refrigerants or mixed working fluid, cold source using other cold sources such as liquid nitrogen, heat source
When other heat sources such as positive energy, geothermal energy, industrial exhaust heat, specific operating process can according to the phase-state change situation of cycle fluid into
Row analysis, can refer to above content.
Compared with the existing technology, the organic Rankine cycle power generation system that can efficiently utilize cryogenic cold energy of the invention, skill
Art advantage is:
1, the present invention also can avoid cycle fluid and exist using pure refrigerant as cycle fluid using mixture as cycle fluid
The phase-state change problem being likely to occur in big temperature, big pressure limit, guarantees the stability and safety of electricity generation system.
2, present invention optimizes it is cold and hot can utilization process reduced pair by the cold recovery to cycle fluid itself
The acquisition of extraneous cold energy and thermal energy, reduces energy dissipation.
3, the present invention can be using LNG as cold energy source, also can be using cryogenic substances such as liquid nitrogen as cold energy source；The present invention can be used
Seawater realizes working medium heating, also realizes working medium heating using the high temperatures heat source such as solar energy, geothermal energy, industrial exhaust heat, this is
The application flexibility of system is strong, wide adaptation range, is a kind of environmentally friendly, energy-saving system.
Detailed description of the invention
Fig. 1 is the organic Rankine cycle power generation system schematic diagram that can efficiently utilize cryogenic cold energy of the invention.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
It the present invention rather than limits the scope of the invention, after the present invention has been read, those skilled in the art are to of the invention each
The modification of kind equivalent form falls within the application range as defined in the appended claims.
As shown in Figure 1, the organic Rankine cycle power generation system that can efficiently utilize cryogenic cold energy of the invention, by cycle fluid
Storage tank 1, working medium circulating pump 2, cold energy use heat exchanger 3, heat energy utilization heat exchanger 4, turbine arrival end gas-liquid separator 5 return
Liquid switch valve 6, turbo-expander 7, generator 8, check-valves 9, turbine outlet end gas-liquid separator 10, fluid infusion switch valve 11 are cold
Energy working medium circulating pump 12, cold energy power pressure stabilizer 13, cold energy working medium recyclable device 14, thermal energy working medium circulating pump 15, thermal energy
Power pressure stabilizer 16, the equal components composition of thermal energy working medium recyclable device 17.It is of the invention can efficient having using cryogenic cold energy
Machine Rankine cycle electricity generation system can be divided into cold energy use unit, heat energy utilization unit, Organic Rankine Cycle power generation on the whole
3 functional units such as unit.
Cold energy use unit, including by the sequentially connected cold energy working medium circulating pump 12 of pipeline, cold energy use heat exchanger 3,
Cold energy power pressure stabilizer 13, cold energy working medium recyclable device 14, wherein cold energy working medium circulating pump 12 outlet by pipeline with it is cold
It can be connected using the first cold side input port of heat exchanger 3；First cold side outlet port of cold energy use heat exchanger 3 passes through pipeline and cold energy
The entrance of power pressure stabilizer 13 is connected；It is recycled by pipeline and cold energy working medium the outlet of cold energy power pressure stabilizer 13
The entrance of device 14 is connected.
Heat energy utilization unit, including by the sequentially connected thermal energy working medium circulating pump 15 of pipeline, heat energy utilization heat exchanger 4,
Thermal energy power pressure stabilizer 16, thermal energy working medium recyclable device 17, in which: the outlet of thermal energy working medium circulating pump 15 by pipeline with
The hot side entrance of heat energy utilization heat exchanger 4 is connected；The hot side outlet of heat energy utilization heat exchanger 4 passes through pipeline and thermal energy working medium pressure
The entrance of power stabilizer 16 is connected；The outlet of thermal energy power pressure stabilizer 16 passes through pipeline and thermal energy working medium recyclable device 17
Entrance be connected.
Organic Rankine Cycle generator unit, including cycle fluid storage tank 1, working medium circulating pump 2, turbine arrival end gas-liquid point
From device 5, turbo-expander 7, turbine outlet end gas-liquid separator 10, turbo-expander 7 is mechanically connected a generator 8, in which: thoroughly
The gaseous phase outlet of flat arrival end gas-liquid separator 5 is connected by pipeline with the entrance of turbo-expander 7；Turbine outlet end gas-liquid
The entrance of separator 10 passes through liquid-phase outlet pipeline, the turbo-expander 7 of pipeline and turbine arrival end gas-liquid separator 5 in parallel
Export pipeline be connected, be provided with back liquid switch valve 6, turbine on the liquid-phase outlet pipeline of turbine arrival end gas-liquid separator 5
Check-valves 9 is provided on the export pipeline of expanding machine 7.The hot side entrance of cold energy use heat exchanger 3 by pipeline with it is in parallel saturating
The gaseous phase outlet of flat outlet end gas-liquid separator 10 is connected with the liquid-phase outlet of turbine outlet end gas-liquid separator 10, and turbine goes out
Fluid infusion switch valve 11 is additionally provided on the liquid-phase outlet pipeline of mouth end gas-liquid separator 10.The hot side of cold energy use heat exchanger 3 goes out
Mouth is connected by pipeline with the entrance of cycle fluid storage tank 1, and the outlet of cycle fluid storage tank 1 is followed by pipeline and working medium
The entrance of ring pump 2 is connected.Second cold side input port of cold energy use heat exchanger 3 passes through the outlet phase of pipeline and working medium circulating pump 2
Connection.Second cold side outlet port of cold energy use heat exchanger 3 is connected by pipeline with the cold side input port of heat energy utilization heat exchanger 4.
The cold side outlet port of heat energy utilization heat exchanger 4 is connected by pipeline with the entrance of turbine arrival end gas-liquid separator 5.
The organic Rankine cycle power generation system that can efficiently utilize cryogenic cold energy of the invention, working principle and concrete operations
Process are as follows:
When cycle fluid is pure refrigerant, cold source LNG, heat source are seawater, 1 supply temperature of cycle fluid storage tank is lower
Liquid circulation working medium, working medium circulating pump 2 is entered by pipeline, through working medium circulating pump 2 boosting after, by cold energy use heat exchanger 3
The second cold side input port enter in cold energy use heat exchanger 3.At the same time, low temperature LNG through cold energy working medium circulating pump 12 boosting after,
Entered by pipeline by the first cold side input port of cold energy use heat exchanger 3.The cycle fluid and LNG of low temperature liquid in cold pipeline
The heat from 3 hot side cycle fluid of cold energy use heat exchanger is absorbed in cold energy use heat exchanger 3, temperature increases.
LNG working medium after heating gasification is discharged via 3 first cold side outlet port of cold energy use heat exchanger, by cold energy working medium pressure
After the pressure stabilizing of power stabilizer 13, supplies to cold energy working medium recyclable device 14, complete the recycling and utilization of next step.
Cycle fluid after heating is left by the second cold side outlet port of cold energy use heat exchanger 3, through heat energy utilization heat exchanger 4
Cold side input port enter in heat energy utilization heat exchanger 4.At the same time, seawater passes through pipe after the boosting of thermal energy working medium circulating pump 15
Road is entered by the hot side entrance of heat energy utilization heat exchanger 4.In heat energy utilization heat exchanger 4, the lower cycle fluid of temperature and temperature
It spends higher seawater and carries out heat exchange, cycle fluid temperature increases, and is gasified totally, the cold side through heat energy utilization heat exchanger 4
Outlet is left, and is entered in turbine arrival end gas-liquid separator 5 by pipeline.Seawater after cooling is stablized via thermal energy power pressure
After device 16 controls pressure, recycle and reuse is realized into thermal energy working medium recyclable device 17.
In turbine arrival end gas-liquid separator 5, cycle fluid pressure remained steady enters turbo-expander by pipeline
7, push turbo-expander 7 externally to do work, turbo-expander 7 drives generator 8 to generate electricity.Cycle fluid after acting passes through non-return
After valve 9, into turbine outlet end gas-liquid separator 10.
According to the phase difference for the cycle fluid that turbo-expander 7 exports, and it is divided into and is all gas phase and two kinds of gas-liquid two-phase
Situation:
When the cycle fluid that turbo-expander 7 exports is all gas phase, fluid infusion switch valve 11 is closed, and cycle fluid is by turbine
The gaseous phase outlet of outlet end gas-liquid separator 10 leaves, and into the hot side entrance of cold energy use heat exchanger 3, exchanges heat in cold energy use
It absorbs the cold energy of low-temperature circulating working medium and LNG working medium in cold pipeline in device 3 to cool down, completely by cold energy use heat exchanger 3 after liquefaction
Hot side outlet leave, into cycle fluid storage tank 1, complete one circulation.
When the cycle fluid that turbo-expander 7 exports is gas-liquid two-phase, fluid infusion switch valve 11 is opened, the circulation industrial of gas phase
Matter is left by the gaseous phase outlet of turbine outlet end gas-liquid separator 10, and the cycle fluid of liquid phase is by turbine outlet end gas-liquid separator
10 liquid-phase outlet leaves, and the common hot side entrance for entering cold energy use heat exchanger 3 absorbs cold in cold energy use heat exchanger 3
In pipeline the cold energy of low-temperature circulating working medium and LNG working medium cool down, completely liquefaction after by cold energy use heat exchanger 3 hot side outlet from
It opens, into cycle fluid storage tank 1, completes a circulation.
When cycle fluid is mixed working fluid (such as mixture of methane, ethane, propane, butane), cold source LNG, heat source are
When seawater, the lower liquid mixed working fluid of 1 supply temperature of cycle fluid storage tank enters working medium circulating pump 2 by pipeline, through work
After matter circulating pump 2 boosts, entered in cold energy use heat exchanger 3 by the second cold side input port of cold energy use heat exchanger 3.It is same with this
When, low temperature LNG working medium is entered by pipeline by the first cold side of cold energy use heat exchanger 3 after the boosting of cold energy working medium circulating pump 12
Mouth enters.The mixed working fluid and LNG of low temperature liquid in cold pipeline absorb in cold energy use heat exchanger 3 to be changed from cold energy use
The heat of hot 3 hot side mixed working fluid of device, temperature increase.
LNG working medium after heating gasification is discharged via the first cold side outlet port of cold energy use heat exchanger 3, by cold energy working medium
After the pressure stabilizing of manostat 13, supplies to cold energy working medium recyclable device 14, complete the recycling and utilization of next step.
Mixed working fluid after heating is left by 3 second cold side outlet port of cold energy use heat exchanger, through heat energy utilization heat exchanger 4
Cold-side inlet enters in heat energy utilization heat exchanger 4.At the same time, seawater passes through pipeline after the boosting of thermal energy working medium circulating pump 15
Entered by the hot side entrance of heat energy utilization heat exchanger 4.In heat energy utilization heat exchanger 4, the lower mixed working fluid of temperature and temperature
Higher seawater carries out heat exchange, and mixed working fluid temperature increases, because methane, ethane, propane, butane saturation state point not
Together, mixed working fluid partial gasification.The mixed working fluid of gas-liquid two-phase leaves through 4 cold side outlet port of heat energy utilization heat exchanger, passes through pipeline
Into in turbine arrival end gas-liquid separator 5.After seawater after cooling controls pressure via thermal energy power pressure stabilizer 16, into
Enter thermal energy working medium recyclable device 17 and realizes recycle and reuse.
In turbine arrival end gas-liquid separator 5, the mixed working fluid of gas-liquid two-phase realizes separation, and the mixed working fluid of gas phase is logical
Piping enters turbo-expander 7, and turbo-expander 7 is pushed externally to do work, and turbo-expander 7 drives generator 8 to generate electricity.Acting
Cycle fluid afterwards is after check-valves 9, into turbine outlet end gas-liquid separator 10.Meanwhile returning liquid switch valve 6 and opening, liquid
The mixed working fluid of phase enters turbine outlet end gas-liquid separator 10 via pipeline.
Since mixed working fluid is gas-liquid two-phase state in turbine outlet end gas-liquid separator 10 at this time, fluid infusion switch valve 11 is beaten
It opens, the mixed working fluid of gas phase is left by the gaseous phase outlet of turbine outlet end gas-liquid separator 10, and the mixed working fluid of liquid phase is by turbine
The liquid-phase outlet of outlet end gas-liquid separator 10 leaves, the common hot side entrance for entering cold energy use heat exchanger 3, in cold energy use
The cold energy of low-temperature mixed working medium and LNG working medium in cold pipeline is absorbed in heat exchanger 3 to cool down, and is exchanged heat after liquefaction by cold energy use completely
The hot side outlet of device 3 is left, and into cycle fluid storage tank 1, completes a circulation.
When cycle fluid is used too using other pure refrigerants or mixed working fluid, cold source using other cold sources such as liquid nitrogen, heat source
When other heat sources such as positive energy, geothermal energy, industrial exhaust heat, specific operating process can according to the phase-state change situation of cycle fluid into
Row analysis, can refer to above content.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. the organic Rankine cycle power generation system that one kind can efficiently utilize cryogenic cold energy, comprising: cold energy use unit, heat energy utilization
Unit, Organic Rankine Cycle generator unit, which is characterized in that
-- the cold energy use unit, including low temperature cold source, cold energy use heat exchanger, cold energy working medium recyclable device, in which: described
Low temperature cold source outlet by pipeline behind the first cold side of the cold energy use heat exchanger with the cold energy working medium recyclable device
Entrance be connected；
-- the heat energy utilization unit, including heat source, heat energy utilization heat exchanger, thermal energy working medium recyclable device, in which: the heat source
Outlet be connected after the hot side of the heat energy utilization heat exchanger with the entrance of the thermal energy working medium recyclable device by pipeline；
-- the Organic Rankine Cycle generator unit, including cycle fluid storage tank, turbine arrival end gas-liquid separator, turbine are swollen
Swollen machine, turbine outlet end gas-liquid separator, generator, in which: the turbo-expander is connect with generator drive gear, the circulation
The second cold side of working medium storage tank exported by pipeline successively through the cold energy use heat exchanger, the heat energy utilization heat exchanger
Cold side after be connected with the entrance of the turbine arrival end gas-liquid separator；The gas phase of the turbine arrival end gas-liquid separator
Outlet is connected by pipeline with the entrance of the turbo-expander；The entrance of turbine outlet end gas-liquid separator passes through pipe
Road is connected with the liquid-phase outlet pipeline of turbine arrival end gas-liquid separator in parallel, the export pipeline of turbo-expander, described
Gaseous phase outlet, the liquid-phase outlet of turbine outlet end gas-liquid separator are connected with the hot side entrance of the cold energy use heat exchanger
Logical, the hot side outlet of the cold energy use heat exchanger is connected with the entrance of the cycle fluid storage tank.
2. can efficiently utilize the organic Rankine cycle power generation system of cryogenic cold energy according to the claims, feature exists
In the one cold energy working medium circulating pump of outlet of the low temperature cold source is connected with the first cold side input port of the cold energy use heat exchanger
It is logical.
3. can efficiently utilize the organic Rankine cycle power generation system of cryogenic cold energy according to the claims, feature exists
In the first cold side outlet port of the cold energy use heat exchanger recycles after a cold energy power pressure stabilizer with the cold energy working medium
The entrance of device is connected.
4. can efficiently utilize the organic Rankine cycle power generation system of cryogenic cold energy according to the claims, feature exists
In the one thermal energy working medium circulating pump of outlet of the heat source is connected with the hot side entrance of the heat energy utilization heat exchanger.
5. can efficiently utilize the organic Rankine cycle power generation system of cryogenic cold energy according to the claims, feature exists
In, the hot side outlet of the heat energy utilization heat exchanger after a thermal energy power pressure stabilizer with the thermal energy working medium recyclable device
Entrance be connected.
6. can efficiently utilize the organic Rankine cycle power generation system of cryogenic cold energy according to the claims, feature exists
In being provided with working medium circulating pump on the export pipeline of the cycle fluid storage tank.
7. can efficiently utilize the organic Rankine cycle power generation system of cryogenic cold energy according to the claims, feature exists
In, liquid switch valve is provided with back on the liquid-phase outlet pipeline of the turbine arrival end gas-liquid separator, the turbo-expander
Check-valves is provided on export pipeline.
8. can efficiently utilize the organic Rankine cycle power generation system of cryogenic cold energy according to the claims, feature exists
In being provided with fluid infusion switch valve on the turbine outlet end gas-liquid separator liquid-phase outlet pipeline.
9. can efficiently utilize the organic Rankine cycle power generation system of cryogenic cold energy according to the claims, feature exists
In the cycle fluid in the Organic Rankine Cycle generator unit can be the derivative of hydrocarbons and hydrocarbons, such as first
The mixture of alkane, ethane, propane, butane, ethylene, F-11 etc. or above-mentioned many kinds of substance.
10. can efficiently utilize the organic Rankine cycle power generation system of cryogenic cold energy, feature according to the claims
Be, the thermal energy working medium in the heat energy utilization unit can be water, conduction oil etc., origin of heat can be seawater, solar energy,
Geothermal energy, industrial exhaust heat etc.；Cold energy working medium in the cold energy use unit can be liquefied natural gas, and liquid nitrogen etc. also can be used
Cryogenic fluid.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847987A (en) * | 2019-12-24 | 2020-02-28 | 青岛中稷龙源能源科技有限公司 | LNG cold energy power generation and comprehensive utilization system and method of mixed working medium |
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| CN111237890A (en) * | 2020-01-10 | 2020-06-05 | 中国空间技术研究院 | Liquid nitrogen cold quantity cascade utilization system and control method thereof |
| CN111577411A (en) * | 2020-05-19 | 2020-08-25 | 西安石油大学 | LNG light hydrocarbon separation coupling enhancement type geothermal flashing/organic Rankine combined cycle power generation system |
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| CN110863873A (en) * | 2019-10-29 | 2020-03-06 | 鲁东大学 | Double-heat-source power generation system based on server |
| CN110847987A (en) * | 2019-12-24 | 2020-02-28 | 青岛中稷龙源能源科技有限公司 | LNG cold energy power generation and comprehensive utilization system and method of mixed working medium |
| CN110847987B (en) * | 2019-12-24 | 2024-04-05 | 青岛中稷龙源能源科技有限公司 | LNG cold energy power generation and comprehensive utilization system and method for mixed working medium |
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| CN111577411A (en) * | 2020-05-19 | 2020-08-25 | 西安石油大学 | LNG light hydrocarbon separation coupling enhancement type geothermal flashing/organic Rankine combined cycle power generation system |
| CN113339082A (en) * | 2021-06-30 | 2021-09-03 | 上海康恒环境股份有限公司 | Low-temperature cold energy recovery power generation system |
| CN114439562A (en) * | 2022-01-19 | 2022-05-06 | 杨兆铭 | LNG cold energy efficient mixed refrigerant power generation method |
| CN114439562B (en) * | 2022-01-19 | 2024-06-11 | 杨兆铭 | LNG cold energy efficient mixed refrigerant power generation method |
| CN114876587A (en) * | 2022-05-16 | 2022-08-09 | 西安热工研究院有限公司 | Multistage power generation system for energy cascade utilization |
| CN114876587B (en) * | 2022-05-16 | 2023-11-07 | 西安热工研究院有限公司 | Multistage power generation system for cascade utilization of energy |
| CN117052619A (en) * | 2023-10-11 | 2023-11-14 | 浙江博旭新能源科技有限公司 | LNG cold energy and photo-thermal hot water low-temperature heat energy combined power generation system and method |
| CN117052619B (en) * | 2023-10-11 | 2024-01-23 | 浙江博旭新能源科技有限公司 | LNG cold energy and photo-thermal hot water low-temperature heat energy combined power generation system and method |
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