CN105694818A - Diesel engine waste heat recovery Rankine cycle mixed work medium hexafluoropropane and pentafluoroethane and method for recycling waste heat - Google Patents
Diesel engine waste heat recovery Rankine cycle mixed work medium hexafluoropropane and pentafluoroethane and method for recycling waste heat Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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 provides a diesel engine waste heat recovery Rankine cycle mixed work medium hexafluoropropane and pentafluoroethane and a method for recycling waste heat. The mass percentage ratio of hexafluoropropane and pentafluoroethane is (0.3-0.9): (0.1-0.7), and the mass percentage sum of two sets of urmaterie is equal to 100%. The critical pressures of the two binary mixed work media approach to each other, the slippage temperature during phase change is high, the environmental protection requirement is met, and circulating performance is good. At the environmental temperature of 25 DEG C, the Rankine cycle efficiency of a diesel engine under a rated working condition is larger than 20%, the thermal efficiency of cycle is high, heat return cycle efficiency is higher compared with that of current other mixed work media and pure work media, the effect is generated because when the matching is used for heat return, a high-pressure heat return outlet can step over high-pressure bubble point temperature, and a low-pressure heat return outlet can step over low-pressure dew point temperature. The temperature pinch point problem of pure work medium Rankine cycle is avoided, and the cycle efficiency can be improved easily.
Description
Technical field
The present invention relates to the Binary mixtures of a kind of low temperature ranking cycle system for reclaiming diesel residual heat。The present invention also relates to adopt the diesel residual heat recovery method of Binary mixtures。
Background technology
Energy problem is own through becoming a first-class major issue in economic development。Diesel engine, with the high advantage of its economy and the thermal efficiency, is widely used in the every field of commercial production and transportation industry, but its used heat accounts for the 55%-70% of burning gross energy, and most energy is discharged in air by cooling water-cooled and high-temperature tail gas。Along with energy supply growing tension, energy-conservation, consumption reduction, raising energy utilization rate increasingly cause the attention of people, so the utilization of engine exhaust heat is inexorable trend。
At present, being directed to recovery diesel residual heat, organic rankine cycle system adopts pure refrigerant, for pure refrigerant Circulated power system, vaporizerLose the highest, limit the raising of cycle efficieny and Cycle Net Work, it main reason is that the folder point temperature difference causes that the matching effect of pure refrigerant and thermal source is poor, the folder point temperature difference is the point that in vaporizer process, the temperature difference is minimum, it occurs in pure refrigerant bubble point position, and the bubble point temperature of pure refrigerant is identical with dew point temperature, and the bubble point temperature of mixed working fluid is different with dew point temperature, there is temperature glide, this has very big benefit for mixed working fluid with mating of Cooling and Heat Source。Therefore, the novel reliable working medium that development environment is friendly, thermodynamic property is good, the development that diesel residual heat utilizes systems technology is most important。
The open report of the mixed working fluid that relevant diesel residual heat utilizes is also more, such as, in the patent document " adopting the low temperature ranking cycle system of non-azeotropic mixed working medium changing component ", adopting heptafluoro-propane and iso-butane to be mixed for utilizing geothermal energy, thermal source is the GEOTHERMAL WATER of 85 DEG C。Thermal efficiency of cycle is 9.41%, but iso-butane therein is inflammable, poor safety performance, it is impossible to reclaim for diesel residual heat；Again such as in the patent document of " a kind of solar energy organic Rankine cycle power generation system ", adopting dichloro one fluoroethane and normal butane to be mixed for utilizing solar energy, but dichloro one fluoroethane can damage the ozone layer, normal butane is inflammable and explosive。
Summary of the invention
It is an object of the invention to provide a kind of being applicable to and reclaim diesel exhaust gas energy, reduce carbon emission, the diesel residual heat of protection environment reclaims Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane。The present invention also aims to provide a kind of exhaust heat recovering method utilizing diesel residual heat to reclaim Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane。
The diesel residual heat of the present invention reclaims Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane is by the Binary mixtures of HFC-236fa and pentafluoroethane physical mixed, HFC-236fa and pentafluoroethane mass percent are (0.3-0.9): (0.1-0.7), and two constituent element material mass mark sums are equal to 100%。
The diesel residual heat of the present invention reclaims the critical pressure of Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane and ranges for 3147kPa-3367kPa, and critical temperature range is 88 DEG C-131 DEG C。
One of diesel residual heat exhaust heat recovering method reclaiming Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane utilizing the present invention is: HFC-236fa and pentafluoroethane Binary mixtures are after working medium pump 8 pressurizes, enter regenerator 6 and absorb the heat of the organic working medium from decompressor 4 outlet, subsequently enter charge air cooler-organic working medium heat exchanger 9 and absorb the heat of charge air cooler, finally enter flue gas-organic working medium heat exchanger 3 and absorb the heat of diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor 4 expansion work, the organic working medium expanded enters regenerator 6 and part energy passes to the organic working medium that working medium pump 8 exports, enter condenser 7 afterwards and be condensed into saturated liquid。
The diesel residual heat utilizing the present invention reclaims the two of the exhaust heat recovering method of Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane: HFC-236fa and pentafluoroethane Binary mixtures are after working medium pump 8 pressurizes, enter regenerator 6 and absorb the heat of the organic working medium from expander outlet, enter flue gas-organic working medium heat exchanger 3 and absorb the heat of diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor 4 expansion work, the organic working medium expanded enters regenerator 6 and part energy passes to the organic working medium that working medium pump 8 exports, enter condenser 7 afterwards and be condensed into saturated liquid。
The diesel residual heat utilizing the present invention reclaims the three of the exhaust heat recovering method of Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane: HFC-236fa and pentafluoroethane Binary mixtures are after working medium pump 8 pressurizes, enter regenerator 6 and absorb the heat of the organic working medium from decompressor 4 outlet, subsequently enter charge air cooler-organic working medium heat exchanger 9 and absorb the heat of charge air cooler, finally enter water or conduction oil-organic working medium heat exchanger 10 absorbs the heat of diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor 4 expansion work, the organic working medium expanded enters regenerator 6 and part energy passes to the organic working medium that working medium pump 8 exports, enter condenser 7 afterwards and be condensed into saturated liquid, wherein the heat source water of water or conduction oil-organic working medium heat exchanger is from gas-water or heat-condutive oil heat exchanger 3, water in gas-water or heat-condutive oil heat exchanger 3 or conduction oil are by flue gas。
The diesel residual heat utilizing the present invention reclaims the four of the exhaust heat recovering method of Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane: HFC-236fa and pentafluoroethane Binary mixtures are after working medium pump 8 pressurizes, enter regenerator 6 and absorb the heat of the organic working medium from expander outlet, entrance water or conduction oil-organic working medium heat exchanger 10 absorb the heat of diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor 4 expansion work, the organic working medium expanded enters regenerator 6 and part energy passes to the organic working medium that working medium pump 8 exports, enter condenser 7 afterwards and be condensed into saturated liquid, wherein the heat source water of water or conduction oil-organic working medium heat exchanger is from gas-water or heat-condutive oil heat exchanger 3, water in gas-water or heat-condutive oil heat exchanger 3 or conduction oil are by flue gas。
The environmental problem that the present invention causes based on solution energy problem and greenhouse effect, takes into full account the feature of diesel exhaust gas, comprehensive raising diesel residual heat Exploitative potential; by Binary mixtures organic Rankine system; reclaim diesel exhaust gas energy, reduce carbon emission, protect environment。
The guiding theory of overall plan of the present invention is by studying discovery, the significantly high thermal efficiency is shown after the working medium mixing of critical temperature difference 70 DEG C, cooling water temperature is filtered out when being 25 DEG C within the scope of this, heat source temperature is under 200 DEG C of diesel exhaust gas temperature conditions, the thermal efficiency working medium proportioning more than 20%。
The Binary mixtures organic rankine cycle system that the present invention relates to includes charge air cooler-organic working medium preheater, flue gas-organic working medium heat exchanger, decompressor, regenerator, condenser, working medium pump。
Described Binary mixtures organic rankine cycle system cycle fluid selects HFC-236fa and pentafluoroethane physical mixed to be Binary mixtures, and HFC-236fa and pentafluoroethane mass percent are (0.3-0.9): (0.1-0.7)。Two constituent element material mass mark sums are equal to 100%, and the basic parameter of two constituent element materials is as shown in table 1。
The basic parameter of contained constituent element in table 1 Binary mixtures
Tc: critical temperature, Pc: critical pressure, ODP: Ozone Depleting Potential (semiempirical numerical value), GWP: Global Greenhouse Effect latent energy value (cumulative time benchmark 100 years)
Two kinds of its critical pressures of Binary mixtures that native system adopts are close, during phase transformation, slip temperature is big, meet environmental requirement, cycle performance is excellent, present invention Rankine cycle efficiency under 25 DEG C of diesel engine declared working condition of ambient temperature is more than 20%, thermal efficiency of cycle is high, extraction cycle efficiency will be high relative to other mixed working fluids at present and pure refrigerant, the reason producing this effect is in that to adopt this proportioning when backheat, high-pressure extraction outlet may span across the bubble point temperature of too high pressure, and the outlet of low pressure backheat may span across the dew point temperature under low pressure。Avoid the temperature folder point problem of pure refrigerant Rankine cycle, be conducive to the raising of cycle efficieny。
Technique scheme is adopted to have following remarkable advantage:
(1) adopt Binary mixtures as the working medium of organic Rankine bottoming cycle, it is possible to effectively to reclaim diesel residual heat, adopt the hybrid mode of HFC-236fa/pentafluoroethane to have the higher thermal efficiency relative to other mixture, be effectively reduced the aerofluxus of diesel engine。Its reason is in that to adopt this proportioning, and during backheat, high-pressure extraction outlet may span across the bubble point temperature of too high pressure, and the outlet of low pressure backheat may span across the dew point temperature under low pressure。
(2) heat of charge air cooler can be effectively utilized by charge air cooler-organic working medium preheater, improve working medium and enter the temperature of flue gas-organic working medium heat exchanger, working medium out enters flue gas-organic working medium heat exchanger afterwards from charge air cooler-organic working medium preheater and continues to heat up, and becomes saturated vapor or superheated steam。Combine heat transfer by charge air cooler-organic working medium preheater and flue gas-organic working medium heat exchanger, it is possible to increase the flow of organic working medium, improve output shaft work。
(3) Binary mixtures is via the steam becoming High Temperature High Pressure after flue gas-organic working medium heat exchanger, enters expansion work in decompressor, and the organic working medium of expander outlet transfers heat to the organic working medium of working medium pump outlet by regenerator, improves the thermal efficiency。
Accompanying drawing explanation
Fig. 1 to Fig. 4 is four kinds of Binary mixtures organic Rankine cycle devices structural representations of the present invention。
Fig. 5 is subcritical tephigram。
Fig. 6 is Trans-critical cycle tephigram。
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail。
In conjunction with Fig. 1, the system that one of diesel residual heat exhaust heat recovering method reclaiming Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane relates to is utilized to be made up of 1-diesel engine, 2-exhaustor, 3-flue gas-organic working medium heat exchanger, 4-decompressor, 5-power transfer device, 6-regenerator, 7-condenser, 8-working medium pump and 9-charge air cooler-organic working medium preheater。Binary mixtures is after working medium pump 8 pressurizes, enter regenerator 6 and absorb the heat of the organic working medium from decompressor 4 outlet, subsequently enter charge air cooler-organic working medium heat exchanger 9 and absorb the heat of charge air cooler, finally enter flue gas-organic working medium heat exchanger 3 and absorb the heat of diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor 4 expansion work, the organic working medium expanded enters regenerator 6 and part energy passes to the organic working medium that working medium pump 8 exports, and enters condenser 7 afterwards and is condensed into saturated liquid。
In conjunction with Fig. 2, two systems related to of the exhaust heat recovering method of diesel residual heat recovery Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane are utilized to be made up of 1-diesel engine, 2-exhaustor, 3-flue gas-organic working medium heat exchanger, 4-decompressor, 5-power transfer device, 6-regenerator, 7-condenser and 8-working medium pump。Binary mixtures is after working medium pump 8 pressurizes, enter regenerator 6 and absorb the heat of the organic working medium from expander outlet, enter flue gas-organic working medium heat exchanger 3 and absorb the heat of diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor 4 expansion work, the organic working medium expanded enters regenerator 6 and part energy passes to the organic working medium that working medium pump 8 exports, and enters condenser 7 afterwards and is condensed into saturated liquid。
In conjunction with Fig. 3, three systems related to of the exhaust heat recovering method of diesel residual heat recovery Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane are utilized to be made up of 1-diesel engine, 2-exhaustor, 3-gas-water or heat-condutive oil heat exchanger, 4-decompressor, 5-power transfer device, 6-regenerator, 7-condenser, 8-working medium pump, 9-charge air cooler-organic working medium preheater and 10-water-organic working medium heat exchanger。This embodiment belongs to indirect heat exchange scheme, adopt water or conduction oil as transmitting medium, the heat of flue gas is passed to mixed working fluid, Binary mixtures is after working medium pump 8 pressurizes, enter regenerator 6 and absorb the heat of the organic working medium from decompressor 4 outlet, subsequently enter charge air cooler-organic working medium heat exchanger 9 and absorb the heat of charge air cooler, finally enter water or conduction oil-organic working medium heat exchanger 10 absorbs the heat of diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor 4 expansion work, the organic working medium expanded enters regenerator 6 and part energy passes to the organic working medium that working medium pump 8 exports, enter condenser 7 afterwards and be condensed into saturated liquid。Wherein the heat source water of water or conduction oil-organic working medium heat exchanger is from gas-water or heat-condutive oil heat exchanger 3, and water in gas-water or heat-condutive oil heat exchanger 3 or conduction oil are by flue gas。
In conjunction with Fig. 4, four systems related to of the exhaust heat recovering method of diesel residual heat recovery Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane are utilized to be made up of 1-diesel engine, 2-exhaustor, 3-gas-water or heat-condutive oil heat exchanger, 4-decompressor, 5-power transfer device, 6-regenerator, 7-condenser, 8-working medium pump and 10-water or conduction oil-organic working medium heat exchanger。This embodiment belongs to indirect heat exchange scheme, adopt water or conduction oil as intermediate transfer medium, the heat of flue gas is passed to mixed working fluid, Binary mixtures is after working medium pump 8 pressurizes, enter regenerator 6 and absorb the heat of the organic working medium from expander outlet, entrance water or conduction oil-organic working medium heat exchanger 10 absorb the heat of diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor 4 expansion work, the organic working medium expanded enters regenerator 6 and part energy passes to the organic working medium that working medium pump 8 exports, enter condenser 7 afterwards and be condensed into saturated liquid。Wherein the heat source water of water or conduction oil-organic working medium heat exchanger is from gas-water or heat-condutive oil heat exchanger 3, and water in gas-water or heat-condutive oil heat exchanger 3 or conduction oil are by flue gas。
In above-mentioned four kinds of methods: diesel residual heat is exhaust heat and charge air cooler waste heat。Aerofluxus ranges for 200 DEG C-350 DEG C as heat source temperature, is made directly heat exchange with Binary mixtures by heat exchanger, or the hot water of diesel residual heat generation temperature range 100 DEG C-170 DEG C carries out indirect heat exchange with Binary mixtures by Intermediate Heat Exchanger。Cooling water temperature is between 10 DEG C to 36 DEG C。Condensing pressure is between about 9% to the 49% of Binary mixtures critical pressure, and condenser temperature sliding is between 11 DEG C to 24 DEG C。Between lower than the bubble point temperature under condensing pressure 0 DEG C to 5 DEG C of condensation temperature, namely degree of supercooling is between 0 DEG C to 5 DEG C。Organic Rankine bottoming cycle adopts a kind of circulation among subcritical cycle or trans critical cycle。Described subcritical cycle, is made directly heat exchange for Binary mixtures by heat exchanger, and evaporating pressure is between about 73% to the 100% of Binary mixtures critical pressure, and evaporation slip temperature is between 3 to 12 DEG C；Carrying out indirect heat exchange for Binary mixtures by Intermediate Heat Exchanger, evaporating pressure is between about 18% to the 100% of Binary mixtures critical pressure, and evaporation slip temperature is between 2 to 22 DEG C。Described trans critical cycle, evaporating pressure is between about 1.01 to the 1.3 of working fluid mixture critical pressure, and maximum cycle temperature is than critical temperature between high 5 DEG C to 112 DEG C。
Fig. 5 is subcritical tephigram, specifically represents the acting process of cycle fluid, is distinctive in that its evaporating pressure is lower than critical pressure with Fig. 6。Process 3-4: the pressure after working medium pump 8 of the organic working medium after condensation improves, saturated liquid organic working medium can be considered through the boost process of working medium pump 8 determines entropic spueezing process。Process 4-a: organic working medium absorbs heat through regenerator 6, has reclaimed partial heat。Process a-1: organic working medium is absorbed heat in charge air cooler-organic working medium preheater 9, flue gas-organic working medium heat exchanger 3, unsaturation state become overheated or saturated organic working medium steam。In process, working medium exchanges without technology work with extraneous。Have ignored the resistance of Working fluid flow process, this process is level pressure endothermic process。Process 1-2: overheated or saturated organic working medium steam expands and external output work in decompressor 4。Export working medium at decompressor 4 and reach low-pressure state, mainly by saturated vapour composition, be called exhaust steam。Ignoring friction and the heat radiation of working medium, this process is isentropic expansion process。Process 2-b: the organic working medium of decompressor 4 outlet enters regenerator 6 and transfers heat to the organic working medium of supercooled state。Process b-1: cooling water is given in exhaust steam heat release in condenser 7, condenses the organic working medium of saturated liquid or the supercooled state becoming under condenser exhaust steam pressure。This process can be considered level pressure exothermic process。Being schemed by this T-S this it appears that high-pressure extraction outlet a point is across the bubble point temperature point 5 under high pressure, low pressure backheat outlet b point may span across the dew point temperature point 7 under low pressure。Temperature folder point occurs in the entrance end of vaporizer and condenser。This is also this kind of mixture advantage relative to other Rankine cycle working medium。
Fig. 6 is Trans-critical cycle tephigram, specifically represents the acting process of cycle fluid, process 3-4: the pressure after working medium pump 8 of the organic working medium after condensation improves, and saturated liquid organic working medium can be considered through the boost process of working medium pump 8 determines entropic spueezing process。Process 4-a: organic working medium absorbs heat through regenerator 6, has reclaimed partial heat。Process a-1: organic working medium is absorbed heat in charge air cooler-organic working medium preheater 9, flue gas-organic working medium heat exchanger 3, unsaturation state become overheated or saturated organic working medium steam。In process, working medium exchanges without technology work with extraneous。Have ignored the resistance of Working fluid flow process, this process is level pressure endothermic process。Process 1-2: overheated or saturated organic working medium steam expands and external output work in decompressor 4。Export working medium at decompressor 4 and reach low-pressure state, mainly by saturated vapour composition, be called exhaust steam。Ignoring friction and the heat radiation of working medium, this process is isentropic expansion process。Process 2-b: the organic working medium of decompressor 4 outlet enters regenerator 6 and transfers heat to the organic working medium of supercooled state. process b-1: exhaust steam heat release is to cooling water in condenser 7, condenses the organic working medium of saturated liquid or the supercooled state becoming under condenser exhaust steam pressure。This process can be considered level pressure exothermic process。Can substantially be looked down on by this T-S figure and push back the dew point temperature point 7 that heat outlet b point may span across under low pressure。This is also this kind of mixture advantage relative to other Rankine cycle working medium。
Claims (6)
1. a diesel residual heat reclaims Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane, it is characterized in that: become Binary mixtures by HFC-236fa with pentafluoroethane physical mixed, HFC-236fa and pentafluoroethane mass percent are (0.3-0.9): (0.1-0.7), and two constituent element material mass mark sums are equal to 100%。
2. diesel residual heat according to claim 1 reclaims Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane, it is characterized in that: critical pressure ranges for 3147kPa-3367kPa, and critical temperature range is 88 DEG C-131 DEG C。
3. the diesel residual heat that a kind utilizes described in claim 1 reclaims the exhaust heat recovering method of Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane, it is characterized in that: HFC-236fa and pentafluoroethane Binary mixtures are after working medium pump (8) pressurizes, enter regenerator (6) and absorb the heat of the organic working medium exported from decompressor (4), subsequently enter charge air cooler-organic working medium heat exchanger (9) and absorb the heat of charge air cooler, finally enter flue gas-organic working medium heat exchanger (3) and absorb the heat of diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor (4) expansion work, the organic working medium expanded enters regenerator (6) and part energy passes to the organic working medium that working medium pump (8) exports, enter condenser (7) afterwards and be condensed into saturated liquid。
4. the diesel residual heat that a kind utilizes described in claim 1 reclaims the exhaust heat recovering method of Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane, it is characterized in that: HFC-236fa and pentafluoroethane Binary mixtures are after working medium pump (8) pressurizes, enter regenerator (6) and absorb the heat of the organic working medium from expander outlet, enter flue gas-organic working medium heat exchanger (3) and absorb the heat of diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor (4) expansion work, the organic working medium expanded enters regenerator (6) and part energy passes to the organic working medium that working medium pump (8) exports, enter condenser 7 afterwards and be condensed into saturated liquid。
5. the diesel residual heat that a kind utilizes described in claim 1 reclaims the exhaust heat recovering method of Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane, it is characterized in that: HFC-236fa and pentafluoroethane Binary mixtures are after working medium pump (8) pressurizes, enter regenerator (6) and absorb the heat of the organic working medium exported from decompressor (4), subsequently enter charge air cooler-organic working medium heat exchanger (9) and absorb the heat of charge air cooler, finally enter water or the heat of conduction oil-organic working medium heat exchanger (10) absorption diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor (4) expansion work, the organic working medium expanded enters regenerator (6) and part energy passes to the organic working medium that working medium pump (8) exports, enter condenser (7) afterwards and be condensed into saturated liquid, wherein the heat source water of water or conduction oil-organic working medium heat exchanger is from gas-water or heat-condutive oil heat exchanger (3), water in gas-water or heat-condutive oil heat exchanger (3) or conduction oil are by flue gas。
6. the diesel residual heat that a kind utilizes described in claim 1 reclaims the exhaust heat recovering method of Rankine cycle mixed working fluid HFC-236fa and pentafluoroethane, it is characterized in that: HFC-236fa and pentafluoroethane Binary mixtures are after working medium pump (8) pressurizes, enter regenerator (6) and absorb the heat of the organic working medium from expander outlet, enter water or the heat of conduction oil-organic working medium heat exchanger (10) absorption diesel exhaust gas, the saturated vapor or the superheated steam that become High Temperature High Pressure enter decompressor (4) expansion work, the organic working medium expanded enters regenerator (6) and part energy passes to the organic working medium that working medium pump (8) exports, enter condenser (7) afterwards and be condensed into saturated liquid, wherein the heat source water of water or conduction oil-organic working medium heat exchanger is from gas-water or heat-condutive oil heat exchanger (3), water in gas-water or heat-condutive oil heat exchanger (3) or conduction oil are by flue gas。
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| CN113446077A (en) * | 2021-06-16 | 2021-09-28 | 淮阴工学院 | Temperature optimization method for organic Rankine cycle system with heat conduction oil circulation |
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| CN113446077A (en) * | 2021-06-16 | 2021-09-28 | 淮阴工学院 | Temperature optimization method for organic Rankine cycle system with heat conduction oil circulation |
| CN113446077B (en) * | 2021-06-16 | 2023-03-21 | 淮阴工学院 | Temperature optimization method for organic Rankine cycle system with heat conduction oil circulation |
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