CN103982259A - Diesel generator cogeneration device based on ORC (organic Rankine cycle) system - Google Patents
Diesel generator cogeneration device based on ORC (organic Rankine cycle) system Download PDFInfo
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- CN103982259A CN103982259A CN201410163424.XA CN201410163424A CN103982259A CN 103982259 A CN103982259 A CN 103982259A CN 201410163424 A CN201410163424 A CN 201410163424A CN 103982259 A CN103982259 A CN 103982259A
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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
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- 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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Abstract
The invention discloses a diesel generator cogeneration device based on an ORC (organic Rankine cycle) system. The diesel generator cogeneration device comprises an ORC refrigerant cycle system, an engine jacket water cycle system, an engine tail gas system, a pressurized air system and an external cooling water system. The diesel generator cogeneration device disclosed by the invention has the most outstanding feature that after the whole generation device normally runs, as a water tank and an intercooler of an engine do not need to work, the power output, to a fan, of a diesel generator can be directly cut off, and therefore, net generation externally output is greatly increased. The diesel generator cogeneration device disclosed by the invention has another outstanding feature that the heat of the cylinder wall of the engine and the tail gas of the engine is fully absorbed for a carrier by utilizing engine jacket water, and therefore, the problem that the local high-temperature failure of refrigerant is brought by the fact that heat exchange is directly performed between the ORC refrigerant and high-temperature exhaust gas is avoided. All components of the system are effectively controlled, and the waste heat of the engine is recycled, and therefore, the generating capacity of the unit fuel consumption of the engine is improved, and the return on investment cycle of the generator is shortened.
Description
Technical field
The present invention relates to engine waste heat recycling system, especially organic Lang Ken cycle engine waste heat recycling system.That is to say the system and device utilizing based on organic Lang Ken cycle engine waste heat recovery, utilize refrigeration agent (as R245fa) to absorb heat from tail gas, jacket water and the pressurized air of motor, the four-stage circulating by Lang Ken, externally acting generating, realizes a kind of system and device from engine waste heat recycling.
Background technique
Along with energy-intensive aggravation, the utilization ratio that improves the energy becomes more and more important.Energy-saving and emission-reduction become current most important problem.And the ORC system circulating based on organic Lang Ken, to the utilization of various industrial exhaust heats or used heat, is a technology that well promotes efficiency of energy utilization.
Lower 40% left and right that is generally of efficiency of energy utilization of motor, also has a large amount of cylinder sleeve of engine water, and motor exhaust and adopt in the pressurized air of charge inter cooling technology and all comprised a large amount of energy for improving engine power enters atmosphere.This causes ambient temperature to raise on the one hand; On the other hand, need to discharge these used heat for guarantee engine work, it also needs to consume extra energy, has further reduced motor efficiency of energy utilization.
The common Lang Ken circulatory system is for the generating of steam turbine, and this Lang Ken circulation has comprised the devices such as turbine, condenser, pump, vaporizer.The working medium adopting is generally water vapor.Water absorbs heat from vaporizer, becomes high temperature and high pressure steam, drives turbine acting generating, and 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 Lang Ken circulation is similar with common Lang Ken circulation, and just working medium difference, generally adopts organic substance as working medium, as adopted R134a, R245fa etc.
Based on the engine waste heat recovering device of organic Lang Ken circulation, utilize exactly the energy of the tail gas (waste gas) of motor discharge, the tail gas that the refrigeration agent working medium of low temperature liquid is discharged from motor, absorb heat, flash to overheated high pressure steam, drive decompressor or turbine acting generating, the weary gas of refrigeration agent of low pressure is emitted heat in condenser simultaneously, liquefy refrigeration agent, after pressurizeing by refrigerant pump, be transported in vaporizer, complete the circulation of whole refrigeration agent working medium, reclaim thereby realize engine exhaust energy.
In existing public technology patent, have and directly utilize motor exhaust to heat ORC refrigerant, but because motor exhaust temperature generally exceedes 500 DEG C, this will cause ORC refrigerant to lose efficacy in localized hyperthermia's place's cracking.In existing public technology, adopt in addition conduction oil as absorbing engine tail gas heat quantity, but increase a new oil-way system, 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 has technical problem, and the simultaneously also used heat utilization ratio of more efficiently raising motor especially promotes effective net electric generation of diesel generator; Another object, under based on a kind of Waste Heat Recovery System (WHRS) device normal operation, improves the generated energy of diesel generator unit's oil consumption.
For addressing the above 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 passes through refrigerant pump supercharging, then enters air-cooler, absorbs the heat of the pressurized air in air-cooler of flowing through; And then pass through successively preheater and vaporizer, and absorbing 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 generation machine again, thereby realizes externally acting generating; What flow out from decompressor is low pressure gaseous coolant, then enters condenser, and heat release in condenser, is condensed into liquid state from gaseous state; Liquid refrigerants returns liquid container, thereby 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 after the heat to engine air casing wall, in motor, flows out, then enter exhaust gas heat exchanger, absorb the heat of motor exhaust; Jacket water is from exhaust gas heat exchanger flows out, and temperature significantly raises, then enters successively in vaporizer and preheater, and the heat absorbing 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 whole cooling water system circulation, realizes the transfer of heat energy from engine air casing wall and motor exhaust to 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, from exhaust gas heat exchanger flows out, enters environment;
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 self 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 system of the present invention is: the cylinder sleeve of engine water that first utilizes diesel generator, the heat that absorbs engine air casing wall and motor exhaust heats up, then heat is passed to refrigerant medium in ORC power generation system, then again pass through cylinder sleeve of engine water pump, get back to absorption heat in motor.In ORC coolant system, refrigerant is after refrigerant pump supercharging, enter pressurized air preheater, absorbing pressurized air heat carries out after preheating, evaporate after absorbing heat through the hot water preheater, the vaporizer that are thermal source by jacket water again, enter the decompressor generating of externally doing work, 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, the heat absorption system that cylinder sleeve of engine water is carrier, utilizes cylinder sleeve of engine water fully to absorb the heat of engine air casing wall and motor exhaust, the problem of avoiding ORC refrigerant and the exchange of high-temp waste gas direct heat to bring refrigerant localized hyperthermia to lose efficacy for carrier.
Two, refrigeration agent acting device and energy recycle device, the water heating system that refrigeration agent is carrier by preheater and vaporizer from cylinder sleeve of engine water absorbs engine waste heat, realize the carburation by evaporation of refrigerant medium, gaseous coolant drives the decompressor generating of externally doing work, and 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, refrigerant is carried out in heating process, realize the reduction of self temperature, to meet the required more air of engine combustion, promote Fuel Economy.
Four, whole system can fully reclaim motor exhaust used heat, the heat of cylinder wall surface heat and turbosupercharging 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 decompressor and condenser, add regenerator, carry out, from liquid refrigerants out of working medium pump with from the out heat exchange of gaseous coolant of decompressor, further improving heat exchanging function.
Further improve again as of the present invention, complete following operation by control system: before ORC electricity generating device starts or during breakdown maintenance, switch by valve, the air flowing out from turbosupercharger, the air-air intercooler of still flowing through carries out cooling; In the time that ORC normally works, switch by valve, whole pressurized airs preheater of flowing through, is undertaken coolingly by refrigerant, and now, self attached modular cooling unit can kill engine.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, make under the oil consumption of motor unit, the net electric generation of ORC system significantly promotes.
Brief description of the drawings
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 respectively 5 subtense angle Concrete workflow journeys and energy transfer process below:
1) ORC coolant circulating system
First refrigerant medium 2 in liquid container 1 passes through refrigerant pump 2 superchargings, then enters air-cooler 4, absorbs the heat up to 150～200 DEG C of pressurized airs in the air-cooler of flowing through; And then pass through successively preheater 5, vaporizer 6, and absorbing 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 generation machine 7 again, thereby realizes externally acting generating; What flow out from decompressor 7 is low pressure gaseous coolant, then enters condenser 8, and heat release in condenser 8, is condensed into liquid state from gaseous state; Liquid refrigerants returns liquid container 1, thereby realizes circulating of whole refrigerant.In order further to improve the waste heat recovery efficiency of whole system, can between decompressor 7 and condenser 8, add regenerator 3, carry out from liquid refrigerants out of working medium pump 2 with from the out heat exchange of gaseous coolant of decompressor 7.The refrigerant using is for 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 after the heat to engine air casing wall, in motor, flows out, and then enters exhaust gas heat exchanger 10, absorbs the heat of motor exhaust; Jacket water is from exhaust gas heat exchanger 10 flows out, and temperature significantly raises, then enters successively in vaporizer 6 and preheater 5, and the heat absorbing 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 whole cooling water system circulation, realizes the transfer of heat energy from engine air casing wall and motor exhaust to ORC refrigerant.
3) motor exhaust system
Tail gas 12 temperature of discharging from motor 9 exceed 500 DEG C, and high-temperature tail gas enters exhaust gas heat exchanger 10, and heat is passed to cylinder sleeve of engine water; Tail gas, from exhaust gas heat exchanger 10 flows out, enters environment.By the optimal design to exhaust gas heat exchanger, the temperature that its tail gas is discharged is controlled at 140 DEG C of left and right, to prevent that motor exhaust medium sulphide content etc. from condensing, corrosion exhaust gas heat exchanger.
4) pressurized air system
Ambient air, after the turbosupercharger of motor, becomes the pressurized air 14 of temperature up to 150～200 DEG C.Pressurized air enters in air-cooler 4, and heat is passed to refrigerant.Air carries out preheating to refrigerant, and self temperature reduces, and ensures engine booster air intake abundance, improves Fuel Economy.Meanwhile, also promoted the recycling of whole ORC system to engine waste heat.
Before ORC electricity generating device starts or during breakdown maintenance, switch by valve, the air flowing out from turbosupercharger, the air-air intercooler of still flowing through carries out cooling.In the time that ORC normally works, switch by valve, whole pressurized airs preheater of flowing through, is undertaken cooling by refrigerant.Now, self attached modular cooling unit that kills engine, 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, make under 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, it is cooling that condenser also can adopt cooling-air to carry out.The present invention was suitable for to as if diesel generator, according to actual diesel generator working environment, can adopt cooling water also can adopt cooling-air to carry out cooling.
Should be understood that: above-described embodiment is just to explanation of the present invention, instead of limitation of the present invention, and any innovation and creation that do not exceed within the scope of connotation of the present invention, within all falling into protection scope of the present invention.
Claims (3)
1. the diesel generator exhaust system based on ORC system, comprises 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 passes through refrigerant pump (2) supercharging, then enters air-cooler (4), absorbs the heat of the pressurized air in air-cooler of flowing through; And then pass through successively preheater (5) and vaporizer (6), and absorbing 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 generation machine (7) again, thereby realizes externally acting generating; What flow out from decompressor (7) is low pressure gaseous coolant, then enters condenser (8), and heat release in condenser (8), is condensed into liquid state from gaseous state; Liquid refrigerants returns liquid container (1), thereby 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 after the heat to engine air casing wall, in motor, flow out, then enter exhaust gas heat exchanger (10), absorb the heat of motor exhaust; Jacket water is from exhaust gas heat exchanger (10) flows out, temperature significantly raises, enter successively again in vaporizer (6) and preheater (5), the heat absorbing 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 whole cooling water system circulation, realizes the transfer of heat energy from engine air casing wall and motor exhaust to 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, from exhaust gas heat exchanger (10) flows out, enters environment;
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 self 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, between described decompressor (7) and condenser (8), be also provided with regenerator (3), carry out from liquid refrigerants out of working medium pump (2) with from the out heat exchange of gaseous coolant of decompressor (7).
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, switch by valve, the air flowing out from turbosupercharger, the air-air intercooler of still flowing through carries out cooling; In the time that ORC normally works, switch by valve, whole pressurized airs preheater of flowing through, is undertaken coolingly by refrigerant, and now, self attached modular cooling unit kills engine.
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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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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104912608A (en) * | 2015-06-22 | 2015-09-16 | 沈阳航空航天大学 | Vehicle engine heating and electricity union system based on reheating type organic Rankine cycle technique |
| CN104564422B (en) * | 2014-12-30 | 2016-06-01 | 清华大学 | Afterheat of IC engine utilization system |
| 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 |
| CN105715407A (en) * | 2016-01-26 | 2016-06-29 | 浙江银轮机械股份有限公司 | Organic Rankine cycle principle based waste heat recovery system for vehicle engine |
| CN105715319A (en) * | 2014-12-02 | 2016-06-29 | 来安县新元机电设备设计有限公司 | Chemical industry waste heat power generation device |
| 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 |
| CN114243056A (en) * | 2021-12-16 | 2022-03-25 | 中车株洲电机有限公司 | Fuel cell system with energy recovery module |
| CN116858002A (en) * | 2022-03-28 | 2023-10-10 | 山东大学 | Heat pipe system of waste heat recovery loop |
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| CN112282930A (en) * | 2020-10-19 | 2021-01-29 | 唐为民 | Integrated self-supercharging variable compression ratio engine |
| CN114243056A (en) * | 2021-12-16 | 2022-03-25 | 中车株洲电机有限公司 | Fuel cell system with energy recovery module |
| 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 |
| CN116858002A (en) * | 2022-03-28 | 2023-10-10 | 山东大学 | Heat pipe system of waste heat recovery loop |
| CN116858002B (en) * | 2022-03-28 | 2024-03-19 | 山东大学 | Heat pipe system of waste heat recovery loop |
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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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