CN104975897A - Power generation system for cooling cylinder wall recovery smoke afterheat of gas engine based on heat conducting oil - Google Patents
Power generation system for cooling cylinder wall recovery smoke afterheat of gas engine based on heat conducting oil Download PDFInfo
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- CN104975897A CN104975897A CN201510306372.1A CN201510306372A CN104975897A CN 104975897 A CN104975897 A CN 104975897A CN 201510306372 A CN201510306372 A CN 201510306372A CN 104975897 A CN104975897 A CN 104975897A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention relates to a power generation system for cooling cylinder wall recovery smoke afterheat of a gas engine based on heat conducting oil. The power generation system comprises a gas engine generator set connected in sequence to form a circulation, a heat conducting oil and smoke heat exchanger, an evaporator for heating an organic working medium through the heat conducting oil, an afterheat recovery component consisting of circulating water heat exchangers for recovering afterheat of the heat conducting oil, an ORC power generation component consisting of a working medium pump, an evaporator, an expander, a generator, an ORC condenser and a working medium filter connected in sequence, and two sets of hot water circulating components. The power generation system fully recovers the afterheat of the gas engine through the heat conducting oil to prevent the incapability of efficient utilization caused by too low water temperature of a cylinder liner of the engine and to prevent the cracking of the working medium caused by too high temperature of adopting smoke as a heat source by the ORC power generation system, so that the total power generation efficiency and the system exergy efficiency of the gas engine generator set can be improved, the energy is saved, the consumption is reduced, and the whole performance of the set in summer and transition seasons is improved.
Description
Technical field
The present invention relates to a kind of waste heat recovery generating system, especially relate to a kind of power generation system based on conduction oil cooling gas internal-combustion engine casing wall Mist heat recovering.
Background technique
The generating efficiency of gas internal-combustion engine generator set, about 30% ~ 40%, has about 2/3rds can be dissipated in environment by flue gas and jacket water by energy.At present, mainly utilize fume afterheat heating domestic hot water to the mode of the UTILIZATION OF VESIDUAL HEAT IN of gas internal-combustion engine generator set, this mode is the major way forming " cogeneration system ".But, because people are to the demand change with time of energy source type and quality, torridity summer and transition season little to the demand of hot water, although the waste heat of jet dynamic control is recycled, be not utilized during this period of time, causing a large amount of wastes of the energy; The flue-gas temperature scope of jet dynamic control is roughly at 350 ~ 600 DEG C, and the temperature that ORC systematic working medium can bear is generally lower than 350 DEG C, and exceed the cracking phenomenon that working medium just likely occurs this limit, therefore fume afterheat is difficult to be generated electricity by ORC system recoveries.People are generally no more than 50 DEG C to the temperature requirement of domestic hot-water, therefore utilize the fume afterheat of jet dynamic control generation domestic hot-water also can not realize " cascade utilization " of the energy.
Organic Rankine bottoming cycle (Organic Rankine Cycle, ORC) refers to the Rankine cycle utilizing organic working medium, and critical piece is decompressor, condenser, working medium pump and vaporizer composition.ORC system can utilize low taste thermal source efficiently, produces high-grade electric energy, and the low-grade energy discharged when condenser can reclaim working fluid condenses produces domestic hot-water.Improve total generating efficiency of system with this, recyclable waste heat produces domestic hot-water again, thus improves total utilization ratio and the exergy efficiencyX of the energy.
Summary of the invention
Be exactly total object of the present invention provides a kind of generating efficiency improving gas internal-combustion engine generator set to overcome the defect of above-mentioned prior art existence, energy-saving and cost-reducing, improve the power generation system based on conduction oil cooling gas internal-combustion engine casing wall Mist heat recovering of unit in the performance of summer and conditioning in Transition Season.
Object of the present invention can be achieved through the following technical solutions:
Based on the power generation system of conduction oil cooling gas internal-combustion engine casing wall Mist heat recovering, comprise
Recovery waste heat assembly: comprise the heat exchanger of gas internal-combustion engine generator set, conduction oil and the flue gas being in turn connected to form circulation, the vaporizer of heat-conducting oil heating organic working medium, the Heat Exchanger in Circulating Water System of recovery conduction oil waste heat, the connecting tube between described heat exchanger and gas internal-combustion engine generator set is provided with the oil storage tank storing conduction oil;
ORC electrification component: comprise the working medium pump, vaporizer, decompressor, generator, ORC condenser and the working medium filter that connect successively;
Hot water circuit assembly: be provided with two covers, respectively cooling heat exchanger and ORC condenser.
Described conduction oil first cools the internal-combustion engine casing wall of gas internal-combustion engine generator set, then enters in heat exchanger and reclaims internal-combustion engine fume afterheat, is re-used as thermal source and enters in vaporizer and heat organic working medium.
Organic working medium after heating enters decompressor acting through evaporator superheat, and pushing generator generates electricity.
The by-pass line and the valve that regulate organic working medium to enter expander inlet parameter is provided with in the loop of described vaporizer.
Described hot water circuit assembly comprises the feed water filter, feed water pump, the heat storage tank that connect through pipeline, and wherein a set of heat storage tank is connected with heat exchanger, and another set of heat storage tank is connected with ORC condenser.
Compared with prior art, the present invention utilizes conduction oil to replace jacket water cooling casing wall, prevent cylinder wall temperature too high, simultaneously preheating conduction oil, the conduction oil of preheating enters flue gas heat-exchange unit and improves conduction oil temperature further, the heat of relative temperature higher (quality is high) can be reclaimed, avoid the possibility directly utilizing high-temperature flue gas heating working medium to cause working medium to be decomposed simultaneously.Conduction oil waste heat reclaiming system can as the stable thermal source of ORC power generation system, and ORC system expander outlet adds regenerator, plays pre-hot working fluid, improves the effect of ORC systems generate electricity efficiency.Can be improved total generating efficiency of gas internal-combustion engine generator unit by the present invention, unit has better economic performance when summer and conditioning in Transition Season are run.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, 1-gas internal-combustion engine generator set, 2-heat exchanger, 3-vaporizer, 4-Heat Exchanger in Circulating Water System, 5-oil storage tank, 6-Heat-transfer Oil Pump, 7-feed water filter, 8-feed water pump, 9-heat storage tank, 10-working medium filter, 11-working medium pump, 12-decompressor, 13-generator, 14-feed water filter, 15-feed water pump, 16-heat storage tank, 17-ORC condenser, V1-first valve, V2-second valve, V3-the 3rd valve, V4-the 4th valve, V5-the 5th valve, V6-the 6th valve.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
Based on the power generation system of conduction oil cooling gas internal-combustion engine casing wall Mist heat recovering, its structure as shown in Figure 1, comprises recovery waste heat assembly, ORC electrification component and hot water circuit assembly.Next explanation is further analyzed to each assembly.
Recovery waste heat assembly comprises heat exchanger 2, the vaporizer 3 of heat-conducting oil heating organic working medium, the Heat Exchanger in Circulating Water System 4 of recovery conduction oil waste heat of gas internal-combustion engine generator set 1, conduction oil and the flue gas being in turn connected to form circulation, and the connecting tube between Heat Exchanger in Circulating Water System 4 and gas internal-combustion engine generator set 1 is provided with the oil storage tank 5 and Heat-transfer Oil Pump 6 that store conduction oil;
ORC electrification component comprises the working medium pump 11, vaporizer 3, decompressor 12, generator 13, ORC condenser 17 and the working medium filter 10 that connect successively.Mainly utilize conduction oil for thermal source, heating organic working medium promotes decompressor 12 and does work, and decompressor 12 connects generator 13 provides electric power.Working medium selects R123, absorb conduction oil heat through heat exchanger 3 and form high pressure high temperature vapor, enter decompressor 12 expansion work, pushing generator 13 generates electricity, then working medium enters ORC condenser 17 and is condensed into liquid, enters vaporizer 3 complete circulation through working medium filter 10, working medium pump 11.When working medium flow or pressure excessive time, four valve V4 on by-pass line and the 5th valve V5 open, prevent decompressor 12 transship be damaged.
Hot water circuit assembly is provided with two covers, comprise the feed water filter 7, feed water pump 8, the heat storage tank 9 that connect through pipeline, and feed water filter 14, feed water pump 15, heat storage tank 16, heat storage tank 9 is connected with heat exchanger 4, heat storage tank 16 is connected with ORC condenser 17, thus difference cooling heat exchanger 4 and ORC condenser 17.
Conduction oil first cools the internal-combustion engine casing wall of gas internal-combustion engine generator set 1, then enters in heat exchanger 2 and reclaims internal-combustion engine fume afterheat, is re-used as thermal source and enters in vaporizer 3 and heat organic working medium.Organic working medium after heating is done work through the overheated decompressor 12 that enters of evaporator 3, and pushing generator 13 generates electricity.After conduction oil heats organic working medium in vaporizer 3, temperature does not reduce completely, and through heat exchanger 4 heated feed water, heated feed water while ORC circulatory system condenser 17 cooling working medium, two cover hot water circuit assemblies provide domestic hot-water.
The present invention not only utilizes conduction oil cooling internal combustion engines casing wall, and conduction oil also absorbs the thermal source of fume afterheat as ORC power generation system simultaneously, avoids directly utilizing fume afterheat to heat ORC systematic working medium and causes working medium cracking.Its winter, summer and the conditioning in Transition Season method of operation are:
When winter, user was higher to thermal load demands, gas internal-combustion engine generator set 1 normally runs, institute's electricity is met consumers' demand, conduction oil flows in the cylinder sleeve of internal-combustion engine through Heat-transfer Oil Pump 6 and cools casing wall, then enter heat exchanger 2 Mist heat recovering, close the second valve V2 and open the first valve V1 on by-pass line simultaneously, conduction oil directly enters Heat Exchanger in Circulating Water System 4, utilize Heat Exchanger in Circulating Water System 4 heating domestic hot water, meet the thermal load demands of user.
Summer and transition season user lower to thermal load demands time, gas internal-combustion engine generator set 1 normally runs, institute's electricity is met consumers' demand, Heat-transfer Oil Pump 6 flows into the cylinder sleeve interior cooling casing wall of internal-combustion engine, then heat exchanger 2 Mist heat recovering is entered, close the first valve V1 and open the second valve V2 simultaneously, conduction oil enters vaporizer 3 and heats ORC power generation system working medium, produce high pressure-temperature steam, open the 3rd valve V3 and close the 4th valve V4, the 5th valve V5 simultaneously, working medium enters decompressor 12 expansion work, pushing generator 13 output electric energy.Then working medium enters ORC condenser 17, is condensed into saturated liquids, and close the 6th valve V6, working medium flows through working medium filter 10, working medium pump 11 enters vaporizer 3 and completes working medium circulation.Now, two cover heat recovery hot water cyclesystems reclaim the waste heat of Heat Exchanger in Circulating Water System 4 in ORC condenser 17 waste heat of ORC systemic circulation, Heat-conduction oil circulation system respectively.
The present invention relates to the cooperation of gas internal-combustion engine generator set and ORC system, therefore system setting up procedure is as follows: first start and reclaim conduction oil waste heat water circulation system, open the first valve V1, close the second valve V2, then starting apparatus combustion engine generator set and Heat-conduction oil circulation system.After internal-combustion engine stable operation, start the hot water cyclesystem reclaiming ORC condenser waste heat, open the 4th valve V4, the 5th valve V5, close the 3rd valve V3, the 6th valve V6, close the first valve V1, open the second valve V2, the working medium of preheating ORC system, when Temperature of Working reaches inlet temperature needed for decompressor, opens the 3rd valve V3, close the 4th valve V4, the 5th valve V5, complete the start step that conduction oil reclaims gas internal-combustion engine afterheat generating system.Outage: first stop oil-electric engine group, opens the 4th valve V4, the 5th valve V5, closes the 3rd valve V3 and stops decompressor and generator; when conduction oil temperature is reduced to below 95 DEG C; open the first valve V1, close the second valve V2, finally close the pump of all circulatory systems.
Claims (5)
1., based on the power generation system of conduction oil cooling gas internal-combustion engine casing wall Mist heat recovering, it is characterized in that, this system comprises
Recovery waste heat assembly: comprise the heat exchanger (2) of gas internal-combustion engine generator set (1), conduction oil and the flue gas being in turn connected to form circulation, the vaporizer (3) of heat-conducting oil heating organic working medium, the Heat Exchanger in Circulating Water System (4) of recovery conduction oil waste heat, the connecting tube between described Heat Exchanger in Circulating Water System (4) and gas internal-combustion engine generator set (1) is provided with the oil storage tank (5) storing conduction oil;
ORC electrification component: comprise the working medium pump (11), vaporizer (3), decompressor (12), generator (13), ORC condenser (17) and the working medium filter (10) that connect successively;
Hot water circuit assembly: be provided with two covers, respectively cooling heat exchanger (4) and ORC condenser (17).
2. the power generation system based on conduction oil cooling gas internal-combustion engine casing wall Mist heat recovering according to claim 1, it is characterized in that, described conduction oil first cools the internal-combustion engine casing wall of gas internal-combustion engine generator set (1), then enter in heat exchanger (2) and reclaim internal-combustion engine fume afterheat, be re-used as thermal source and enter heating organic working medium in vaporizer (3).
3. the power generation system based on conduction oil cooling gas internal-combustion engine casing wall Mist heat recovering according to claim 2, it is characterized in that, organic working medium after heating is done work through the overheated decompressor (12) that enters of evaporator (3), and pushing generator (13) generates electricity.
4. the power generation system based on conduction oil cooling gas internal-combustion engine casing wall Mist heat recovering according to claim 3, it is characterized in that, in the loop of described vaporizer (3), be provided with the by-pass line and the valve that regulate organic working medium to enter decompressor (12) intake condition.
5. the power generation system based on conduction oil cooling gas internal-combustion engine casing wall Mist heat recovering according to claim 1, it is characterized in that, described hot water circuit assembly comprises the feed water filter (7 connected through pipeline, 14), feed water pump (8,15), heat storage tank (9,16), described heat storage tank (9) is connected with heat exchanger (4), and described heat storage tank (16) is connected with ORC condenser (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510306372.1A CN104975897A (en) | 2015-06-04 | 2015-06-04 | Power generation system for cooling cylinder wall recovery smoke afterheat of gas engine based on heat conducting oil |
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| CN201510306372.1A CN104975897A (en) | 2015-06-04 | 2015-06-04 | Power generation system for cooling cylinder wall recovery smoke afterheat of gas engine based on heat conducting oil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687376A (en) * | 2017-08-29 | 2018-02-13 | 广州番禺速能冷暖设备有限公司 | A kind of electricity generation system to be generated electricity using internal combustion engine waste heat |
| CN109826686A (en) * | 2019-03-25 | 2019-05-31 | 深圳市奥宇节能技术股份有限公司 | Residual neat recovering system |
| CN111777299A (en) * | 2020-06-30 | 2020-10-16 | 中国石油大学(华东) | Oily sludge pyrolysis energy recovery system based on single screw expander |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111777299A (en) * | 2020-06-30 | 2020-10-16 | 中国石油大学(华东) | Oily sludge pyrolysis energy recovery system based on single screw expander |
| CN111777299B (en) * | 2020-06-30 | 2022-02-18 | 中国石油大学(华东) | Oily sludge pyrolysis energy recovery system based on single screw expander |
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Application publication date: 20151014 |
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