CN103982259B - A kind of diesel generator exhaust system based on ORC system - Google Patents
A kind of diesel generator exhaust system based on ORC system Download PDFInfo
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- CN103982259B CN103982259B CN201410163424.XA CN201410163424A CN103982259B CN 103982259 B CN103982259 B CN 103982259B CN 201410163424 A CN201410163424 A CN 201410163424A CN 103982259 B CN103982259 B CN 103982259B
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- 239000003507 refrigerant Substances 0.000 claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000005057 refrigeration Methods 0.000 claims abstract description 18
- 239000002826 coolant Substances 0.000 claims abstract description 17
- 230000004087 circulation Effects 0.000 claims abstract description 12
- 239000000446 fuel Substances 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 claims abstract description 4
- 239000003570 air Substances 0.000 claims description 44
- 239000007788 liquid Substances 0.000 claims description 21
- 239000006200 vaporizer Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000012080 ambient air Substances 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000002918 waste heat Substances 0.000 abstract description 10
- 238000004064 recycling Methods 0.000 abstract description 6
- 206010020843 Hyperthermia Diseases 0.000 abstract description 3
- 230000036031 hyperthermia Effects 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 23
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001839 systemic circulation Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Engine Equipment That Uses Special Cycles (AREA)
- Supercharger (AREA)
Abstract
The invention discloses a kind of diesel generator exhaust system based on ORC system, comprise ORC coolant circulating system, cylinder sleeve of engine water circulation system, motor exhaust system, pressurized air system and external refrigeration water system.The most significant feature of patent of the present invention is, after whole electricity generating device normally runs, because the water tank of motor and Intercooler are without the need to work, directly can cut off the power stage to fan of diesel generator, thus the net electric generation realizing externally exporting significantly promotes.Another distinguishing feature of the present invention is, utilizes cylinder sleeve of engine water fully to absorb the heat of engine air casing wall and motor exhaust for carrier, avoids the problem that ORC refrigerant and the direct heat exchange of high-temp waste gas bring refrigerant localized hyperthermia to lose efficacy.By effectively controlling native system all parts, by engine waste heat recycling, improving the generated energy of motor unit fuel consume, shortening the investment cycle of generator.
Description
Technical field
The present invention relates to engine waste heat recycling system, especially Organic Rankine Cycle engine waste heat recycling system.That is to say the system and device recycled based on Organic Rankine Cycle engine waste heat, refrigeration agent (as R245fa) is utilized to absorb heat from the tail gas of motor, jacket water and pressurized air, by the four-stage that Lang Ken circulates, external acting generating, realizes a kind of system and device from engine waste heat recycling.
Background technique
Along with energy-intensive aggravation, the utilization ratio improving the energy becomes more and more important.Energy-saving and emission-reduction become current most important problem.And based on the ORC system of Organic Rankine Cycle, to the utilization of various industrial exhaust heat or used heat, be a technology well promoting efficiency of energy utilization.
The efficiency of energy utilization of motor is lower is generally about 40%, also has a large amount of cylinder sleeve of engine water, motor exhaust and adopt in the pressurized air of charge inter cooling technology all contain a large amount of energy for improving engine power, enters air.This causes ambient temperature to raise on the one hand; On the other hand, for ensureing that engine work needs to discharge these used heat, it also needs to consume extra energy, reduce further motor efficiency of energy utilization.
The common Lang Ken circulatory system is used for the generating of steam turbine, and this Lang Ken circulation includes the devices such as turbine, condenser, pump, vaporizer.The working medium adopted is generally water vapor.Water absorbs heat from vaporizer, becomes high temperature and high pressure steam, and drive turbine acting generating, the exhaust steam after acting is got back to condensation in condenser and become liquid, then is driven into vaporizer by water pump, realizes a systemic circulation.Organic Rankine Cycle and common Lang Ken circulate similar, and just working medium is different, generally adopt organic substance as working medium, as adopted R134a, R245fa etc.
Based on the engine waste heat recovering device of Organic Rankine Cycle, the energy of the tail gas (waste gas) utilizing motor to discharge exactly, the refrigeration agent working medium of low temperature liquid absorbs heat from the tail gas that motor is discharged, flash to overheated high pressure steam, drive expansion power generator or turbine acting generating, the weary gas of refrigeration agent of low pressure releases heat within the condenser simultaneously, liquefy refrigeration agent, be transported to after being pressurizeed by refrigerant pump in vaporizer, complete the circulation of whole refrigeration agent working medium, thus realize engine exhaust energy regenerating.
Based in existing public technology patent, have and directly utilize motor exhaust to heat ORC refrigerant, but because motor exhaust temperature is generally more than 500 DEG C, this will cause ORC refrigerant to lose efficacy in localized hyperthermia's place's cracking.In existing public technology, also have and adopt conduction oil as absorption engine tail gas heat quantity, but the oil-way system that increase by is new, cause the complexity of cost and control and application to be restricted.
Summary of the invention
The present invention is intended to solve current existing public technology and there is technical problem, and simultaneously the Waste Heat Reuse efficiency of also more efficiently raising motor, especially promotes effective net electric generation of diesel generator; Another object, based under a kind of Waste Heat Recovery System (WHRS) device normal operation, improves the generated energy of diesel generator unit oil consumption.
For solving the problem, the present invention is by the following technical solutions: a kind of diesel generator exhaust system based on ORC system, comprise ORC coolant circulating system, cylinder sleeve of engine water circulation system, motor exhaust system, pressurized air system and external refrigeration water system, it is characterized in that:
In described ORC coolant circulating system, first the refrigerant medium in liquid container through refrigerant pump supercharging, then enters air-cooler, absorbs the heat of the pressurized air flowed through in air-cooler; And then successively through preheater and vaporizer, absorb the heat of jacket water and tail gas, evaporative phase-change, becomes high temperature and high pressure steam; The refrigerant of High Temperature High Pressure flows in expansion power generator again, thus realizes externally doing work generating; From expansion power generator outflow is low-pressure gaseous refrigerant, then enters condenser, within the condenser heat release, is condensed into liquid state from gaseous state; Liquid refrigerants returns liquid container, thus realizes circulating of whole refrigerant;
In described cylinder sleeve of engine water circulation system, first cylinder sleeve of engine water enter in motor through circulating water pump, absorbs fuel combustion and discharge to after the heat of engine air casing wall, flow out in motor, then enter exhaust gas heat exchanger, absorb the heat of motor exhaust; After jacket water flows out from exhaust gas heat exchanger, temperature significantly raises, then enters in vaporizer and preheater successively, and the heat absorbed from engine air casing wall and motor exhaust is all passed to corresponding refrigerant; After jacket water flows out from preheater, temperature significantly reduces, and enters motor through circulating water pump, completes the circulation of whole cooling water system, realizes heat energy from engine air casing wall and motor exhaust to the transfer of ORC refrigerant;
In described motor exhaust system, the high-temperature tail gas of discharging from motor enters exhaust gas heat exchanger, and heat is passed to cylinder sleeve of engine water; Tail gas enters environment after flowing out from exhaust gas heat exchanger;
In described pressurized air system, ambient air, after the turbosupercharger of motor, becomes high temperature pressurised air; Pressurized air enters in air-cooler, and heat is passed to refrigerant, and own temperature reduces, and then enters motor;
In described external refrigeration water system, external refrigeration water, through condenser, absorbs the heat of gaseous coolant, becomes the liquid refrigerants of low-temp low-pressure.
The working principle of present system is: the cylinder sleeve of engine water first utilizing diesel generator, the heat absorbing engine air casing wall and motor exhaust heats up, then heat is passed to refrigerant medium in ORC power generation system, then again through cylinder sleeve of engine water pump, get back in motor and absorb heat.In ORC coolant system, refrigerant is after refrigerant pump supercharging, enter pressurized air preheater, after absorption pressurized air heat carries out preheating, again through be the hot water preheater of thermal source by jacket water, vaporizer evaporates after absorbing heat, enter expansion power generator externally to do work generating, then become liquid refrigerants through condenser, then completed the work cycle of a refrigerant by refrigerant pump supercharging.
Feature of the present invention is as follows:
One, cylinder sleeve of engine water is the heat absorption system of carrier, utilizes cylinder sleeve of engine water fully to absorb the heat of engine air casing wall and motor exhaust for carrier, avoids the problem that ORC refrigerant and the direct heat exchange of high-temp waste gas bring refrigerant localized hyperthermia to lose efficacy.
Two, refrigeration agent acting device and energy recycle device, after refrigeration agent absorbs engine waste heat by preheater and vaporizer from the water heating system that cylinder sleeve of engine water is carrier, realize the carburation by evaporation of refrigerant medium, gaseous coolant drives expansion power generator externally to do work generating, realizes the recycling of energy.
Three, engine booster air system, fresh air is after turbosupercharging, become high temperature and high pressure gas, through air-cooler, heat is passed to refrigerant, carrying out in heating process to refrigerant, realize the reduction of own temperature, to meet more air needed for engine combustion, promote Fuel Economy.
Four, whole system can fully reclaim motor exhaust used heat, the heat of cylinder wall surface heat and turbo charged air, and reuse efficiency is higher, and the operation of whole system is more steady and structural configuration is more compact.
As a further improvement on the present invention, in ORC coolant circulating system, between expansion power generator and condenser, add regenerator, carry out, from refrigerant pump liquid refrigerants out and the heat exchange from expansion power generator out gaseous coolant, improving heat exchanging function further.
Improve further again as of the present invention, complete following operation by control system: before ORC electricity generating device starts or during breakdown maintenance, by valve transfer, from the air that turbosupercharger flows out, still flow through air-air intercooler and cool; When ORC normally works, by valve transfer, whole pressurized airs flows through preheater, is cooled by refrigerant, and now, can kill engine self attached modular cooling unit.This modular cooling unit comprises radiator of water tank, Intercooler and engine-driven fan.In ORC power generation system normal work period, because the cooling fan of motor self quits work, under making the oil consumption of motor unit, the net electric generation of ORC system significantly promotes.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Fig. 1 is structured flowchart of the present invention.
Embodiment
With reference to accompanying drawing, a kind of diesel generator exhaust system based on ORC system of the present invention, comprises 5 subtense angles such as ORC coolant circulating system, cylinder sleeve of engine water circulation system, motor exhaust system, pressurized air system and external refrigeration water system.Introduce 5 subtense angle Concrete workflow journeys and energy transfer process below respectively:
1) ORC coolant circulating system
First refrigerant medium 2 in liquid container 1 through refrigerant pump 2 supercharging, then enters air-cooler 4, absorbs the heat flowed through up to 150 ~ 200 DEG C of pressurized airs in air-cooler; And then successively through preheater 5, vaporizer 6, absorb the heat of jacket water, evaporative phase-change, becomes high temperature and high pressure steam; The refrigerant of High Temperature High Pressure flows in expansion power generator 7 again, thus realizes externally doing work generating; From expansion power generator 7 outflow is low-pressure gaseous refrigerant, and then enter condenser 8, heat release in condenser 8, is condensed into liquid state from gaseous state; Liquid refrigerants returns liquid container 1, thus realizes circulating of whole refrigerant.In order to improve the heat recovery efficiency of whole system further, regenerator 3 can be added between expansion power generator 7 and condenser 8, carrying out from refrigerant pump 2 liquid refrigerants out and the heat exchange from expansion power generator 7 out gaseous coolant.The refrigerant used is refrigeration agent working medium, as R245fa.
2) cylinder sleeve of engine water circulation system
First cylinder sleeve of engine water 13 enter in motor 9 through circulating water pump, absorbs fuel combustion and discharge to after the heat of engine air casing wall, flow out, then enter exhaust gas heat exchanger 10 in motor, absorb the heat of motor exhaust; After jacket water flows out from exhaust gas heat exchanger 10, temperature significantly raises, then enters in vaporizer 6 and preheater 5 successively, and the heat absorbed from engine air casing wall and motor exhaust is all passed to corresponding refrigerant; After jacket water flows out from preheater 5, temperature significantly reduces, and enters motor 9 through circulating water pump, completes the circulation of whole cooling water system, realizes heat energy from engine air casing wall and motor exhaust to the transfer of ORC refrigerant.
3) motor exhaust system
From motor 9 discharge tail gas 12 temperature more than 500 DEG C, high-temperature tail gas enters exhaust gas heat exchanger 10, and heat is passed to cylinder sleeve of engine water; Tail gas enters environment after flowing out from exhaust gas heat exchanger 10.By the optimal design to exhaust gas heat exchanger, the temperature that its tail gas is discharged controls at about 140 DEG C, to prevent the condensations such as motor exhaust medium sulphide content, and corrosion exhaust gas heat exchanger.
4) pressurized air system
Ambient air, after the turbosupercharger of motor, becomes the pressurized air 14 of temperatures as high 150 ~ 200 DEG C.Pressurized air enters in air-cooler 4, and heat is passed to refrigerant.Air carries out preheating to refrigerant, and own temperature reduces, and ensures that engine booster air intake is sufficient, improves Fuel Economy.Meanwhile, whole ORC system is also improved to the recycling of engine waste heat.
Before ORC electricity generating device starts or during breakdown maintenance, by valve transfer, from the air that turbosupercharger flows out, still flow through air-air intercooler and cool.When ORC normally works, by valve transfer, whole pressurized airs flows through air-cooler, is cooled by refrigerant.Now, kill engine self attached modular cooling unit, and this modular cooling unit comprises radiator of water tank, Intercooler and engine-driven fan.In ORC power generation system normal work period, because the cooling fan of motor self quits work, under making the oil consumption of motor unit, the net electric generation of ORC system significantly promotes.
5) external refrigeration water system
External refrigeration water, through condenser 8, is used for absorbing the heat of gaseous coolant, becomes the liquid refrigerants of low-temp low-pressure.Meanwhile, in the present invention, condenser also can adopt cooling-air to cool.The present invention be suitable for as if diesel generator, according to actual diesel generator working environment, can adopt cooling water that cooling-air also can be adopted to cool.
It is understood that above-described embodiment is just to explanation of the present invention, instead of limitation of the present invention, any innovation and creation do not exceeded in spirit of the present invention, all fall within protection scope of the present invention.
Claims (3)
1., based on a diesel generator exhaust system for ORC system, comprise ORC coolant circulating system, cylinder sleeve of engine water circulation system, motor exhaust system, pressurized air system and external refrigeration water system, it is characterized in that:
In described ORC coolant circulating system, the refrigerant medium in liquid container (1), first through refrigerant pump (2) supercharging, then enters air-cooler (4), absorbs the heat of the pressurized air flowed through in air-cooler; And then successively through preheater (5) and vaporizer (6), absorb the heat of jacket water, evaporative phase-change, becomes high temperature and high pressure steam; The refrigerant of High Temperature High Pressure flows in expansion power generator (7) again, thus realizes externally doing work generating; What flow out from expansion power generator (7) is low-pressure gaseous refrigerant, then enters condenser (8), and heat release in condenser (8), is condensed into liquid state from gaseous state; Liquid refrigerants returns liquid container (1), thus realizes circulating of whole refrigerant;
In described cylinder sleeve of engine water circulation system, first cylinder sleeve of engine water enter in motor (9) through circulating water pump, absorbing fuel combustion discharges to after the heat of engine air casing wall, flow out in motor, then enter exhaust gas heat exchanger (10), absorb the heat of motor exhaust; After jacket water flows out from exhaust gas heat exchanger (10), temperature significantly raises, enter successively again in vaporizer (6) and preheater (5), the heat absorbed from engine air casing wall and motor exhaust is all passed to corresponding refrigerant; After jacket water flows out from preheater (5), temperature significantly reduces, and enters motor (9) through circulating water pump, completes the circulation of whole cooling water system, realizes heat energy from engine air casing wall and motor exhaust to the transfer of ORC refrigerant;
In described motor exhaust system, the high-temperature tail gas of discharging from motor (9) enters exhaust gas heat exchanger (10), and heat is passed to cylinder sleeve of engine water; Tail gas enters environment after flowing out from exhaust gas heat exchanger (10);
In described pressurized air system, ambient air, after the turbosupercharger of motor, becomes high temperature pressurised air; Pressurized air enters in air-cooler (4), and heat is passed to refrigerant, and own temperature reduces, and then enters motor;
In described external refrigeration water system, external refrigeration water, through condenser (8), absorbs the heat of gaseous coolant, becomes the liquid refrigerants of low-temp low-pressure.
2. a kind of diesel generator exhaust system based on ORC system as claimed in claim 1, it is characterized in that in described ORC coolant circulating system, also be provided with regenerator (3) between described expansion power generator (7) and condenser (8), carry out from refrigerant pump (2) liquid refrigerants out and the heat exchange from expansion power generator (7) out gaseous coolant.
3. a kind of diesel generator exhaust system based on ORC system as claimed in claim 1 or 2, it is characterized in that before ORC electricity generating device starts or during breakdown maintenance, by valve transfer, from the air that turbosupercharger flows out, still flow through air-air intercooler and cool; When ORC normally works, by valve transfer, whole pressurized airs flows through air-cooler, is cooled by refrigerant, and now, kill engine self attached modular cooling unit.
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| CN201410163424.XA CN103982259B (en) | 2014-04-22 | 2014-04-22 | A kind of diesel generator exhaust system based on ORC system |
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| CN201410163424.XA CN103982259B (en) | 2014-04-22 | 2014-04-22 | A kind of diesel generator exhaust system based on ORC system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105626306A (en) * | 2014-10-30 | 2016-06-01 | 天津大学 | Double low-temperature heat resource and double-pressure-stage waste heat recovering system for large marine diesel engine |
| CN105715319B (en) * | 2014-12-02 | 2017-02-08 | 来安县新元机电设备设计有限公司 | Chemical industry waste heat power generation device |
| CN104564422B (en) * | 2014-12-30 | 2016-06-01 | 清华大学 | Afterheat of IC engine utilization system |
| CN104912608B (en) * | 2015-06-22 | 2017-04-12 | 沈阳航空航天大学 | Vehicle engine heating and electricity union system based on reheating type organic Rankine cycle technique |
| CN105715407B (en) * | 2016-01-26 | 2017-07-07 | 浙江银轮机械股份有限公司 | A kind of vehicle motor WHRS based on organic Rankine bottoming cycle principle |
| CN107269366A (en) * | 2017-05-04 | 2017-10-20 | 中国北方发动机研究所(天津) | A kind of utilization exhausting heat energy improves the method and engine of engine plateau power |
| CN112282930A (en) * | 2020-10-19 | 2021-01-29 | 唐为民 | Integrated self-supercharging variable compression ratio engine |
| CN114243056B (en) * | 2021-12-16 | 2023-04-25 | 中车株洲电机有限公司 | Fuel cell system with energy recovery module |
| CN116858002B (en) * | 2022-03-28 | 2024-03-19 | 山东大学 | A waste heat recovery loop heat pipe system |
| CN115059552A (en) * | 2022-05-30 | 2022-09-16 | 上汽通用汽车有限公司 | An engine heat energy recovery system and a heat energy recovery power generation method |
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| US4586338A (en) * | 1984-11-14 | 1986-05-06 | Caterpillar Tractor Co. | Heat recovery system including a dual pressure turbine |
| JP2000073753A (en) * | 1998-09-01 | 2000-03-07 | Nissan Motor Co Ltd | Waste heat recovery device for internal combustion engine |
| AU9420101A (en) * | 2000-10-10 | 2002-04-22 | Honda Motor Co Ltd | Rankine cycle device of internal combustion engine |
| JP2011106302A (en) * | 2009-11-13 | 2011-06-02 | Mitsubishi Heavy Ind Ltd | Engine waste heat recovery power-generating turbo system and reciprocating engine system including the same |
| JP2011231636A (en) * | 2010-04-26 | 2011-11-17 | Mitsubishi Heavy Ind Ltd | Exhaust heat recovery power generator and ship provided with exhaust heat recovery power generator |
| CN202645775U (en) * | 2012-05-04 | 2013-01-02 | 福建绿色大地环保科技有限公司 | Waste heat recycling system for methane engine |
| CN103670558B (en) * | 2013-12-27 | 2015-09-02 | 天津大学 | The afterheat of IC engine reclaiming system of two pressure multi-stage expansion reheating |
| CN203906028U (en) * | 2014-04-22 | 2014-10-29 | 浙江银轮机械股份有限公司 | Diesel generator waste heat power generating device based on ORC system |
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Denomination of invention: A waste heat power generation device of diesel generator based on Orc system Effective date of registration: 20210610 Granted publication date: 20150916 Pledgee: Bank of China Limited by Share Ltd. Tiantai County branch Pledgor: ZHEJIANG YINLUN MACHINERY Co.,Ltd. Registration number: Y2021330000510 |
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