CN115263474A - Single working medium steam combined cycle - Google Patents

Single working medium steam combined cycle Download PDF

Info

Publication number
CN115263474A
CN115263474A CN202010945851.9A CN202010945851A CN115263474A CN 115263474 A CN115263474 A CN 115263474A CN 202010945851 A CN202010945851 A CN 202010945851A CN 115263474 A CN115263474 A CN 115263474A
Authority
CN
China
Prior art keywords
working medium
kilogram
kilogram working
heat
exothermic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010945851.9A
Other languages
Chinese (zh)
Inventor
李鸿瑞
李华玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CN115263474A publication Critical patent/CN115263474A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • 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
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • 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
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • 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
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/02—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of multiple-expansion type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention provides a single working medium steam combined cycle, and belongs to the technical field of energy and power. Single working medium steam combined cycle, is formed from M1Kilogram and M2Kilogram formed working medium, nine processes carried out separately or together-M1Boosting process of working medium kilogram 12,M1The kilogram working medium absorbs heat and is vaporized 23,M2Kilogram working medium pressure rising process 63, M3Kilogram working medium endothermic process 34, M345, M in kilogram working medium depressurization process3Exothermic process of 5f, M in kilogram working medium2Kilogram working medium heat release process f6, M1Decompression process f7, M of kilogram working medium1Kilogram working medium heat release condensation process 71-a closed process of composition; wherein, M3Is M1And M2And (4) the sum.

Description

Single working medium steam combined cycle
The technical field is as follows:
the invention belongs to the technical field of energy and power.
Background art:
cold demand, heat demand and power demand, which are common in human life and production; among them, the conversion of thermal energy into mechanical energy is an important way to obtain and provide power. Generally, the temperature of the heat source decreases with the release of heat, and the heat source is variable in temperature; when fossil fuel is used as source energy, the heat source has the dual characteristics of high temperature and variable temperature, so that the utilization rate of energy is not ideal when refrigeration, heat supply or conversion into power is realized by adopting a single thermodynamic cycle theory.
Taking an external combustion type steam power device as an example, a heat source of the external combustion type steam power device belongs to a high-temperature and variable-temperature heat source; when Rankine cycle is taken as a theoretical basis and steam is taken as a cycle working medium to realize thermal power conversion, the cycle working medium and a heat source have large temperature difference loss and large irreversible loss no matter what parameters are adopted for operation due to the limitation of temperature resistance and pressure resistance and safety of materials, so that the thermal efficiency is low.
People need to simply, actively and efficiently utilize fuel generation or other high-temperature heat energy to realize refrigeration, heat supply or power conversion, which needs support of a thermal science basic theory; in a thermal science basic theory system, thermodynamic cycle is the core of the theoretical basis of a heat energy utilization device and an energy utilization system; the establishment and development application of thermodynamic cycle will play a great role in the leap of energy utilization, and will actively promote social progress and productivity development.
The invention provides a single-working-medium steam combined cycle, which aims to provide theoretical support for simplification and high efficiency of a thermodynamic system aiming at the power application of a high-temperature heat source or a variable-temperature heat source from the principle of simply, actively and efficiently realizing temperature difference utilization.
The invention content is as follows:
the invention mainly aims to provide a single-working-medium steam combined cycle, and the specific invention contents are explained in terms as follows:
1. single working medium steam combined cycle, is formed from M1Kilogram and M2Kilogram formed working medium, nine processes carried out separately or together-M1Boosting process of working medium kilogram 12,M1Kilogram working medium heat absorption vaporization process 23,M2Kilogram working medium pressure rising process 63, M3Kilogram working medium endothermic process 34, M345, M step-down process of kilogram working medium3Exothermic process of 5f, M in kilogram working medium2Kilogram working medium heat release process f6, M1Decompression process f7, M with kilogram working medium1Kilogram working medium heat release condensation process 71-a closed process of composition; wherein M is3Is M1And M2And (4) summing.
2. Single working medium steam combined cycle, meaning consisting of M1Kilogram and M2Working medium composed of kilograms of composition, twelve processes carried out separately or together or in part-M1Kilogram working medium pressure increasing process 12,M1The kilogram working medium absorbs heat and is vaporized 23,M2Kilogram working medium pressure rising process 83, M334 kilogram working medium heat absorption process, 47X kilogram working medium pressure reduction process, (M)3-X) kilogram working substance endothermic Process 45, (M)3-X) decompression Process 56 with kg of working substance, (M)3-X) exothermic Process 67,M of working substance kg3Exothermic process 7f, M with kilogram of working medium2Kilogram working medium heat release process f8, M1Decompression process f9, M with kilogram working medium1Kilogram working medium heat release condensation process 91-a closed process of composition; wherein, M3Is M1And M2And (4) summing.
3. Single working medium steam combined cycle, is formed from M1Kilogram and M2Working medium composed of kilograms of composition, twelve processes carried out separately or together or in part-M1Boosting process of working medium kilogram 12,M1Kilogram working medium heat absorption process 2b, (M)1+ M) kg heat absorption vaporization process b3, M26a in kilogram working medium pressure increasing process, ab in M kilogram working medium heat releasing condensation process, (M)2M) kilogram working medium pressure boosting Process a3, M3Kilogram working medium endothermic process 34, M345, M step-down process of kilogram working medium3The exothermic process of kilogram working medium is 5f2Kilogram working medium exothermic process f6, M1Decompression process f7, M of kilogram working medium1Kilogram working medium exothermic condensation process 71-a closed process of composition; wherein M is3Is M1And M2And (4) summing.
4. Single working medium steam combined cycle, is formed from M1Kilogram and M2Working medium composed of kilograms of composition, fifteen processes carried out separately or together or partially-M1Boosting process of working medium kilogram 12,M1Kilogram working medium heat absorption process 2b, (M)1+ M) kilogram working medium endothermic vaporization process b3, M2Pressure-increasing process of working medium kilogram 8a, heat-releasing condensation process of working medium M kilogram ab (M)2M) kilogram working medium pressure boosting Process a3, M334 kilogram working medium heat absorption process, 47X kilogram working medium pressure reduction process, (M)3-X) kilogram working substance endothermic Process 45, (M)3-X) decompression Process 56 with kg of working substance, (M)3-X) exothermic Process 67,M of working substance kg3Exothermic process 7f, M with kilogram of working medium2Kilogram working medium heat release process f8, M1Decompression process f9, M of kilogram working medium1Kilogram working medium heat release condensation process 91-a closed process of composition; wherein M is3Is M1And M2And (4) summing.
5. Single working medium steam combined cycle, is formed from M1Kilogram and M2Working medium composed of kilogram, nine processes carried out separately or together-M1Kilogram working medium pressure increasing process 12,M1The kilogram working medium absorbs heat and is vaporized 23,M2Kilogram working medium boosting process f3, M3Kilogram working medium endothermic process 34, M345, M step-down process of kilogram working medium3Exothermic process of 5f, M in kilogram working medium1Kilogram working medium exothermic process f6, M1Decompression process with kilogram working medium 67,M1Kilogram working medium heat release condensation process 71-a closed process of composition; wherein M is3Is M1And M2And (4) summing.
6. Single working medium steam combined cycle, meaning consisting of M1Kilogram and M2Working medium composed of kilograms of composition, twelve processes carried out separately or together or in part-M1Boosting process of working medium kilogram 12,M1The kilogram working medium absorbs heat and is vaporized 23,M2Kilogram working medium boosting process f3, M334 kilogram working medium heat absorption process, 47X kilogram working medium pressure reduction process, (M)3-X) kilogram working substance endothermic Process 45, (M)3-X) decompression Process 56 with kg of working substance, (M)3-X) exothermic Process 67,M of working substance kg3Exothermic process 7f, M with kilogram of working medium1Kilogram working medium heat release process f8, M1Decompression process with kilogram working medium 89,M1Kilogram working medium exothermic condensation process91-the closure process of composition; wherein, M3Is M1And M2And (4) summing.
7. Single working medium steam combined cycle, meaning consisting of M1Kilogram and M2Working medium composed of kilograms of composition, twelve processes carried out separately or together or in part-M1Boosting process of working medium kilogram 12,M1Kilogram working medium heat absorption process 2b, (M)1+ M) kg heat absorption vaporization process b3, M2Fa in kilogram working medium boosting process, ab in M kilogram working medium heat releasing condensation process, (M)2M) kg working medium pressure increase Process a3, M3Kilogram working medium endothermic process 34, M345, M step-down process of kilogram working medium3Exothermic process of 5f, M in kilogram working medium1Kilogram working medium heat release process f6, M1Decompression process with kilogram working medium 67,M1Kilogram working medium heat release condensation process 71-a closed process of composition; wherein M is3Is M1And M2And (4) the sum.
8. Single working medium steam combined cycle, is formed from M1Kilogram and M2Working medium composed of kilograms of composition, fifteen processes carried out separately or together or partially-M1Boosting process of working medium kilogram 12,M1Kilogram working medium endothermic process 2b, (M)1+ M) kg heat absorption vaporization process b3, M2Fa in kilogram working medium boosting process, ab in M kilogram working medium heat releasing condensation process, (M)2M) kilogram working medium pressure boosting Process a3, M334 kilogram working medium heat absorption process, 47X kilogram working medium pressure reduction process, (M)3-X) kilogram of working fluid endotherm 45, (M)3-X) kg working medium depressurization 56, (M)3-X) exothermic Process 67,M of working substance kg3Exothermic process 7f, M with kilogram of working medium1Kilogram working medium exothermic process f8, M1Decompression process with kilogram working medium 89,M1Kilogram working medium heat release condensation process 91-a closed process of composition; wherein M is3Is M1And M2And (4) summing.
Description of the drawings:
FIG. 1 is an exemplary illustration of a 1 st principal flow scheme for a single-working-medium combined-steam cycle provided in accordance with the present invention.
FIG. 2 is an exemplary diagram of a 2 nd schematic flow diagram of a single-working-medium vapor combined cycle according to the present invention.
FIG. 3 is an exemplary diagram of a3 rd principle flow of a single-working-medium vapor combined cycle according to the present invention.
FIG. 4 is a diagram illustrating an example of the 4 th principle flow of a single-working-medium vapor combined cycle according to the present invention.
FIG. 5 is an exemplary diagram of a 5 th principle flow of a single-working-medium vapor combined cycle according to the present invention.
FIG. 6 is an exemplary diagram of a 6 th principle flow of a single-working-medium vapor combined cycle according to the present invention.
FIG. 7 is a diagram illustrating an example of the 7 th principle flow of a single-working-medium vapor combined cycle according to the present invention.
FIG. 8 is an exemplary diagram of an 8 th principle flow of a single-working-medium combined steam cycle according to the present invention.
The specific implementation mode is as follows:
it should be noted that, in the description of the structure and the flow, the description is not repeated if necessary, and the obvious flow is not described; in each of the following examples, M3Is M1And M2Summing; the invention is described in detail below with reference to the figures and examples.
The single-working-medium steam combined cycle example in the T-s diagram of fig. 1 is performed as follows:
(1) From the cycle process:
working medium carries out-M1Pressure raising process of kilogram working medium condensate 12,M1The kilogram working medium absorbs heat to heat, vaporize and overheat 23263, M step-up and temperature-rising process of kilogram working medium334, M kilogram working medium absorbs heat and heats up3Decompression expansion process 45,M of kilogram working medium3The process of releasing heat and reducing the temperature by kilogram of working medium is 5f2Kilogram working medium heat release cooling process f6, M1Decompression expansion process f7, M of kilogram working medium1Kilogram working medium exothermal condensation 71-9 processes in total.
(2) From the aspect of energy conversion:
(1) endothermic process-M1Working with 23 kg of working medium and M3The 34 process is carried out by kilogram working medium, the heat absorption of the high-temperature section is generally provided by an external heat source, and the heat absorption of the low-temperature section is provided by the external heat source or by M35f process and M with kilogram working medium2The kilogram of working medium is provided by heat release (backheating) of the 6f process, or is provided by an external heat source and the working medium backheating.
(2) Exothermic process-M35f Process and M in kg working substance2Kilogram working medium releases heat in the 6f process, corresponding heat requirements can be met, or partial or all heat absorption requirements for other processes of combined cycle can be met, and useless parts are released to a low-temperature heat source (such as environment); m1The heat release of the kilogram working medium in the 71 process is generally released to a low-temperature heat source, and is provided to a heat user during heat power combined supply.
(3) Energy conversion Process-M1The boosting process 12 of kilogram working medium is generally completed by a circulating pump, M2The boosting 63 of the kilogram of working medium is generally effected by a compressor, M3Decompression expansion process 45 and M of kilogram working medium1The kilogram working medium decompression expansion process f7 is generally completed by an expansion machine; the expansion work is larger than the pressure-raising power consumption, the heat-changing work is completed, the circulation net work is provided for the outside, and the single working medium steam combined circulation is formed.
The single-working-medium vapor combined cycle example in the T-s diagram of fig. 2 is performed as follows:
(1) From the circulation process:
working medium process-M1Boosting process of kilogram working medium condensate 12,M1The kilogram working medium absorbs heat to heat, vaporize and overheat 232The kilogram working medium raises the pressure and raises the temperature 83, M334 kilogram working medium heat absorption and temperature rise process, 47X kilogram working medium pressure reduction and expansion process, (M)3-X) kilogram working medium endothermic temperature rise 45, (M)3-X) kilogram working medium depressurization expansion Process 56, (M)3-X) kg working medium exothermic cooling process 67,M3Process for lowering temp. by releasing heat from kilogram working medium 7f, M2Kilogram working medium heat release cooling process f8, M1Decompression process f9, M with kilogram working medium1And the kilogram working medium releases heat and is condensed 91-12 processes in total.
(2) From the energy conversion perspective:
(1) endothermic process-M1Carrying out 23 processes and M on kilogram working media334 kg of working medium and (M)3-X) 45 processes are carried out with kg of working substance, the heat absorption of the high temperature section of which is generally provided by an external heat source; the heat absorption of the low-temperature section is performed by an external heat source or (M)3-X) 67 processes per kilogram of working fluid, M37f Process and M in kg working substance2And (3) releasing heat (backheating) of the kilogram of working medium in the f8 process, or providing the heat by an external heat source and the backheating of the working medium.
(2) Exothermic Process- (M)3X) Heat release from 67 processes per kilogram of working fluid, M3Heat release of 7f process per kilogram of working medium, and M2The kilogram working medium is subjected to the heat release of f8, so that the corresponding heat requirement can be met, or part or most of the heat absorption requirement for other processes of combined cycle can be met, and the useless part is released to a low-temperature heat source (such as environment); m1The heat released in the process of 91 kg of working medium is generally released to a low-temperature heat source and is provided to a heat user during heat and power combined supply.
(3) Energy conversion Process-M1The boosting process 12 of kilogram working medium is generally completed by a circulating pump, M2The boosting process 83 of kilogram working medium is generally completed by a compressor, and the pressure reduction process 47, (M) of X kilogram working medium3X) depressurization of working substances 56 and M1The kilogram working medium decompression expansion process f9 is generally completed by an expansion machine; the expansion work is larger than the pressure-raising power consumption, the heat-changing work is completed, the circulation net work is provided for the outside, and the single working medium steam combined circulation is formed.
The single-working-medium steam combined cycle example in the T-s diagram shown in fig. 3 is performed as follows:
(1) From the cycle process:
working medium process-M1Boosting process of kilogram working medium condensate 12,M1Kilogram working medium and M kilogram working medium mixed heat absorption temperature rise process 2b, (M)1+ M) kilogram working medium endothermic temperature, vaporization and superheating process b3, M26a, M kg working medium and M in the process of boosting and heating kilogram working medium1Mixing heat release condensation process of kilogram working mediumab，(M2-M) kilogram working medium pressure and temperature rising process a3, M334, M kilogram working medium absorbs heat and heats up3Decompression expansion process 45,M of kilogram working medium3The process of releasing heat and reducing the temperature by kilogram of working medium is 5f2Kilogram working medium heat release cooling process f6, M1Decompression expansion process f7, M of kilogram working medium1Kilogram working medium exothermal condensation 71-total 12 processes.
(2) From the energy conversion perspective:
(1) endothermic process-M1Heat absorption of kilogram working medium in 2b process comes from mixed heat release of M kilogram superheated steam, M1B3 Process and M with kg working substance3The 34 process is carried out by kilogram working medium, the heat absorption of the high-temperature section is generally provided by an external heat source, and the heat absorption of the low-temperature section is provided by the external heat source or M3Carrying out 5f process and M on kilogram working medium2And (3) releasing heat (backheating) of the kilogram of working medium in the f6 process, or providing the heat by an external heat source and the backheating of the working medium.
(2) Exothermic process-M356 processes and M with kg of working medium2Kilogram working medium releases heat in the f6 process, corresponding heat requirements can be met, or partial or all heat absorption requirements for other processes of combined cycle can be met, and useless parts are released to a low-temperature heat source (such as environment); m is a group of1The heat release of the kilogram working medium in the 71 process is generally released to a low-temperature heat source, and is provided to a heat user during heat power combined supply.
(3) Energy conversion Process-M1The boosting process 12 of kilogram working medium is generally completed by a circulating pump, M2Boosting process 6a and (M) with kilogram working medium2M) boosting of the working medium kg a3 is generally carried out by a compressor, M3Decompression expansion process 45 and M of kilogram working medium1The kilogram working medium decompression expansion process f7 is generally completed by an expansion machine; the expansion work is larger than the pressure rise power consumption, the heat work change is completed, the circulation net work is provided for the outside, and the single working medium steam combined circulation is formed.
The single-working-medium steam combined cycle example in the T-s diagram shown in fig. 4 is performed as follows:
(1) From the cycle process:
work byMedia run-M1Pressure raising process of kilogram working medium condensate 12,M1Kilogram working medium and M kilogram working medium mixed heat absorption temperature rise process 2b, (M)1+ M) kg of working medium absorbs heat to raise temperature, vaporize and overheat processes b3, M2Pressure and temperature raising process of kilogram working medium 8a, M kilogram working medium and M1Ab (M) of the condensation process of heat release of the mixture of kilograms of working substances2-M) kilogram working medium pressure and temperature rising process a3, M334 kilogram working medium heat absorption and temperature rise process, 47X kilogram working medium pressure reduction and expansion process, (M)3-X) kilogram working medium endothermic heating process 45, (M)3-X) kilogram working medium depressurization expansion Process 56, (M)3-X) kg working substance exothermic cooling process 67,M3Process for lowering temp. by releasing heat from kilogram working medium 7f, M2Kilogram working medium heat release cooling process f8, M1Decompression expansion process f9, M of kilogram working medium1Kilogram working medium exothermal condensation process 91- — 15 processes in total.
(2) From the aspect of energy conversion:
(1) endothermic process-M1Heat absorption of 2b process by kilogram working medium comes from mixed heat release of M kilograms of superheated steam, (M)1+ M) kg working medium for b3 process, M334 kg of working medium and (M)3-X) 45 processes are carried out with kg of working substance, the heat absorption of the high temperature section of which is generally provided by an external heat source; the heat absorption of the low-temperature section is performed by an external heat source or (M)3-X) 67 processes per kilogram of working fluid, M3Carrying out 7f process and M on kilogram working medium2And (3) releasing heat (backheating) of the kilogram of working medium in the f8 process, or providing the heat by an external heat source and the backheating of the working medium.
(2) Exothermic Process- (M)3X) Heat release from 67 processes per kilogram of working fluid, M3Heat release of 7f process per kilogram of working medium, and M2Kilogram working medium releases heat in the f8 process, corresponding heat requirements can be met, or part or most of heat absorption requirements for other processes of combined cycle can be met, and useless parts are released to a low-temperature heat source (such as environment); m is a group of1The heat released in the process of 91 kg of working medium is generally released to a low-temperature heat source and is provided to a heat user during heat and power combined supply.
(3) Energy conversion Process-M1The boosting process 12 of kilogram working medium is generally completed by a circulating pump, M2Boosting processes 8a and (M) of kg working medium2M) the step-up process a3 of kg of working medium is generally carried out by a compressor, the step-down process 47 of X kg of working medium, (M)3X) depressurization of working substances 56 and M1The kilogram working medium decompression expansion process f9 is generally completed by an expansion machine; the expansion work is larger than the pressure rise power consumption, the heat work change is completed, the circulation net work is provided for the outside, and the single working medium steam combined circulation is formed.
The single-working-medium vapor combined cycle example in the T-s diagram of fig. 5 is performed as follows:
(1) From the cycle process:
working medium process-M1Pressure raising process of kilogram working medium condensate 12,M1The kilogram working medium absorbs heat to heat, vaporize and overheat 232Kilogram working medium pressure-rising and temperature-rising process f3, M334, M kilogram working medium absorbs heat and heats up3Decompression expansion process 45,M of kilogram working medium3The process of releasing heat and reducing the temperature by kilogram of working medium is 5f1Kilogram working medium heat release and temperature reduction process f6, M1Decompression expansion process 67,M of kilogram working medium1Kilogram working medium exothermal condensation 71-9 processes in total.
(2) From the energy conversion perspective:
(1) endothermic process-M1Working with 23 kg of working medium and M3The 34 process is carried out by kilogram working medium, the heat absorption of the high-temperature section is generally provided by an external heat source, and the heat absorption of the low-temperature section is provided by the external heat source or by M3Carrying out 5f process and M on kilogram working medium1The kilogram working medium is provided by heat release (backheating) of the f6 process, or is provided by an external heat source and the working medium backheating.
(2) Exothermic Process-M3Heat release in 5f process per kilogram of working medium, and M1Kilogram working medium releases heat in the f6 process, corresponding heat requirements can be met, or partial or all heat absorption requirements for other processes of combined cycle can be met, and useless parts are released to a low-temperature heat source (such as environment); m1The heat generated in the 71 process is released to low-temperature heat source and is used as heat in heat power combined supplyAnd providing by the user.
(3) Energy conversion Process-M1The boosting process 12 of kilogram working medium is generally completed by a circulating pump, M2The boosting process f3 of kilogram working medium is generally completed by a compressor, M3Decompression expansion process 45 and M of kilogram working medium1The kilogram working medium decompression expansion process 67 is generally completed by an expansion machine; the expansion work is larger than the pressure rise power consumption, the heat work change is completed, the circulation net work is provided for the outside, and the single working medium steam combined circulation is formed.
The single-working-medium vapor combined cycle example in the T-s diagram of fig. 6 is performed as follows:
(1) From the cycle process:
working medium process-M1Boosting process of kilogram working medium condensate 12,M1The kilogram working medium absorbs heat to heat, vaporize and overheat 232Kilogram working medium pressure-rising and temperature-rising process f3, M334 kilogram working medium heat absorption and temperature rise process, 47X kilogram working medium pressure reduction and expansion process, (M)3-X) kilogram working medium endothermic heating process 45, (M)3-X) kilogram working medium depressurization expansion Process 56, (M)3-X) kg working substance exothermic cooling process 67,M37f, M in the process of cooling by heat released from kilogram working medium1Kilogram working medium heat release cooling process f8, M1Decompression process 89, M with kilogram working medium1Kilogram working medium exothermal condensation process 91-12 processes in total.
(2) From the energy conversion perspective:
(1) endothermic process-M1Carrying out 23 processes and M by kilogram working medium334 kg of working medium and (M)3-X) 45 processes are carried out with kg of working substance, the heat absorption of the high temperature section of which is generally provided by an external heat source; the heat absorption of the low-temperature section is performed by an external heat source or (M)3-X) carrying out 67 processes per kilogram of working medium, M3Carrying out 7f process and M on kilogram working medium1And (3) releasing heat (backheating) of the kilogram of working medium in the f8 process, or providing the heat by an external heat source and the backheating of the working medium.
(2) Exothermic Process- (M)3X) Heat release from 67 processes per kilogram of working fluid, M3Heat release of 7f process is carried out by kilogram working medium, M1Kilogram working mediumThe heat release of the f8 process is carried out, so that the corresponding heat demand can be met, or part or most of the heat absorption demand for other processes of the combined cycle can be met, and useless parts are released to a low-temperature heat source (such as the environment); m is a group of1The heat released in the process of 91 kg of working medium is generally released to a low-temperature heat source and is provided to a heat user during heat and power combined supply.
(3) Energy conversion Process-M1The boosting process 12 of kilogram working medium is generally completed by a circulating pump, M2The boosting process f3 of kilogram of working medium is generally completed by a compressor, and the pressure reduction process 47, (M) of X kilogram of working medium3X) depressurization of working substances 56 and M1The kilogram working medium decompression expansion process 89 is generally completed by an expansion machine; the expansion work is larger than the pressure-raising power consumption, the heat-changing work is completed, the circulation net work is provided for the outside, and the single working medium steam combined circulation is formed.
The single-working-medium steam combined cycle example in the T-s diagram of fig. 7 is performed as follows:
(1) From the cycle process:
working medium process-M1Pressure raising process of kilogram working medium condensate 12,M1Mixing heat absorption temperature rise process 2b of kilogram working medium and M kilogram working medium, (M)1+ M) kilogram working medium endothermic temperature, vaporization and superheating process b3, M2Fa, M kg working medium and M in kilogram working medium pressure-increasing and temperature-raising process1Ab (M) of the condensation process of the heat released by the mixture of kilograms of working medium2-M) kg working medium pressure and temperature rising process a3, M334, M kilogram working medium absorbs heat and heats up3Decompression expansion process 45,M of kilogram working medium3The process of releasing heat and reducing the temperature by kilogram of working medium is 5f1Kilogram working medium heat release cooling process f6, M1Decompression expansion process 67,M of kilogram working medium1Kilogram working medium exothermal condensation 71-total 12 processes.
(2) From the energy conversion perspective:
(1) endothermic process-M1Heat absorption of kilogram working medium in 2b process comes from mixed heat release of M kilogram superheated steam, M1B3 Process and M in kg of working substance3The 34 process is carried out by kilogram working medium, the heat absorption of the high temperature section is generally provided by an external heat source, and the heat absorption of the low temperature sectionHeat from an external source or from M3Carrying out 5f process and M on kilogram working medium1The kilogram working medium is provided by heat release (backheating) of the f6 process, or is provided by an external heat source and the working medium backheating.
(2) Exothermic process-M3Heat release in 5f process per kilogram of working medium, and M1Kilogram working medium releases heat in the f6 process, corresponding heat requirements can be met, or partial or all heat absorption requirements for other processes of combined cycle can be met, and useless parts are released to a low-temperature heat source (such as environment); m1Heat is released in the 71 process by kilogram working medium, and the heat is generally released to a low-temperature heat source and provided to a heat user during heat power cogeneration.
(3) Energy conversion Process-M1The boosting process 12 of kg of working medium is generally carried out by means of a circulation pump, M2Pressure boosting process fa and (M) of kilogram working medium2M) boosting of the working medium kg a3 is generally carried out by a compressor, M3Decompression expansion process 45 and M of kilogram working medium1The kilogram working medium decompression expansion process 67 is generally completed by an expansion machine; the expansion work is larger than the pressure-raising power consumption, the heat-changing work is completed, the circulation net work is provided for the outside, and the single working medium steam combined circulation is formed.
The single-working-medium vapor combined cycle example in the T-s diagram of fig. 8 is performed as follows:
(1) From the cycle process:
working medium process-M1Boosting process of kilogram working medium condensate 12,M1Mixing heat absorption temperature rise process 2b of kilogram working medium and M kilogram working medium, (M)1+ M) kg of working medium absorbs heat to raise temperature, vaporize and overheat processes b3, M2Pressure-increasing and temperature-raising process fa, M kg working medium and M1Ab (M) of the condensation process of the heat released by the mixture of kilograms of working medium2-M) kilogram working medium pressure and temperature rising process a3, M3Kilogram working medium heat absorption and temperature rise process 34, X kilogram working medium pressure reduction and expansion process 47, (M)3-X) kilogram working medium endothermic heating process 45, (M)3-X) kilogram working medium depressurization expansion Process 56, (M)3-X) kg working substance exothermic cooling process 67,M3Process for lowering temp. by releasing heat from kilogram working medium 7f, M1Kilogram working medium heat release coolingDistance f8, M1Decompression expansion process 89, M of kilogram working medium1And the kilogram working medium releases heat and is condensed 91-15 processes in total.
(2) From the energy conversion perspective:
(1) endothermic process-M1Heat absorption of 2b process by kilogram working medium comes from mixed heat release of M kilograms of superheated steam, (M)1+ M) kg working medium for b3 process, M334 kg of working medium and (M)3-X) 45 processes are carried out with kg of working substance, the heat absorption of the high temperature section of which is generally provided by an external heat source; the heat absorption of the low-temperature section is performed by an external heat source or (M)3-X) 67 processes per kilogram of working fluid, M3Carrying out 7f process and M on kilogram working medium1And (3) releasing heat (backheating) of the kilogram of working medium in the f8 process, or providing the heat by an external heat source and the backheating of the working medium.
(2) Exothermic Process- (M)3X) Heat release from 67 processes per kilogram of working fluid, M3Heat release of 7f process is carried out by kilogram working medium, M1Kilogram working medium releases heat in the f8 process, corresponding heat requirements can be met, or part or most of heat absorption requirements for other processes of combined cycle can be met, and useless parts are released to a low-temperature heat source (such as environment); m1The heat released in the process of 91 kg of working medium is generally released to a low-temperature heat source and is provided to a heat user during heat and power combined supply.
(3) Energy conversion Process-M1The boosting process 12 of kg of working medium is generally carried out by means of a circulation pump, M2Pressure boosting process fa and (M) of kilogram working medium2M) the step-up process a3 of kg of working medium is generally carried out by a compressor, the step-down process 47 of X kg of working medium, (M)3X) depressurization of working substances 56 and M1The kilogram working medium decompression expansion process 89 is generally completed by an expansion machine; the expansion work is larger than the pressure-raising power consumption, the heat-changing work is completed, the circulation net work is provided for the outside, and the single working medium steam combined circulation is formed.
The effect that the technology of the invention can realize-the single working medium steam combined cycle provided by the invention has the following effects and advantages:
(1) Creating a thermal energy (temperature difference) utilization basic theory.
(2) The heat load in the phase change heat absorption process is greatly reduced, the heat absorption load in a high-temperature section is relatively increased, and the heat efficiency is high.
(3) The method is simple, reasonable in flow and good in applicability, and is a common technology for realizing effective utilization of temperature difference.
(4) The single working medium is beneficial to production and storage; reduce the running cost and improve the flexibility of circulation regulation
(5) The process is shared, the process is reduced, and a theoretical basis is provided for reducing equipment investment.
(6) In the high temperature zone or the temperature changing zone, the circulating medium and the heat source medium are in the temperature changing process, so that the temperature difference heat transfer loss of a heat absorbing link is reduced, and the heat efficiency is improved.
(7) The low-pressure high-temperature operation mode is adopted in the high-temperature area, so that the contradiction that the heat efficiency, the circulating medium parameters and the pressure and temperature resistance of the pipe are difficult to reconcile in the traditional steam power device is solved.
(8) On the premise of realizing high thermal efficiency, low-pressure operation can be selected, and theoretical support is provided for improving the operation safety of the device.
(9) The working medium has wide application range, can well meet the energy supply requirement, and is flexibly matched with the working parameters.
(10) The thermodynamic cycle range for realizing temperature difference utilization is expanded, and efficient power utilization of a high-temperature heat source and a variable-temperature heat source is favorably realized.

Claims (8)

1. Single working medium steam combined cycle, is formed from M1Kilogram and M2Kilogram formed working medium, nine processes carried out separately or together-M1Boosting process of working medium kilogram 12,M1The kilogram working medium absorbs heat and is vaporized 23,M2Kilogram working medium pressure rising process 63, M3Kilogram working medium endothermic process 34, M345, M step-down process of kilogram working medium3Exothermic process of 5f, M in kilogram working medium2Kilogram working medium heat release process f6, M1Decompression process f7, M with kilogram working medium1Kilogram working medium exothermic condensation process 71-a closed process of composition; wherein M is3Is M1And M2And (4) the sum.
2. Single working medium steam combined cycle, meaning consisting of M1Kilogram and M2Working medium composed of kilograms of composition, twelve processes carried out separately or together or in part-M1Boosting process of working medium kilogram 12,M1The kilogram working medium absorbs heat and is vaporized 23,M2Kilogram working medium pressure rising process 83, M334 kilogram working medium heat absorption process, 47X kilogram working medium pressure reduction process, (M)3-X) kilogram working substance endothermic Process 45, (M)3-X) decompression Process 56 with kg of working substance, (M)3-X) exothermic process 67,M of kg working medium3Exothermic process 7f, M in kilogram working medium2Kilogram working medium heat release process f8, M1Decompression process f9, M with kilogram working medium1Kilogram working medium heat release condensation process 91-a closed process of composition; wherein M is3Is M1And M2And (4) the sum.
3. Single working medium steam combined cycle, meaning consisting of M1Kilogram and M2Working medium composed of kilograms of composition, twelve processes carried out separately or together or in part-M1Kilogram working medium pressure increasing process 12,M1Kilogram working medium heat absorption process 2b, (M)1+ M) kilogram working medium endothermic vaporization process b3, M26a in kilogram working medium pressure increasing process, M in kilogram working medium heat releasing condensation process ab (M)2M) kilogram working medium pressure boosting Process a3, M334, M kilogram working medium heat absorption process345, M in kilogram working medium depressurization process3The exothermic process of kilogram working medium is 5f2Kilogram working medium exothermic process f6, M1Decompression process f7, M with kilogram working medium1Kilogram working medium exothermic condensation process 71-a closed process of composition; wherein M is3Is M1And M2And (4) summing.
4. Single working medium steam combined cycle, is formed from M1Kilogram and M2Working medium composed of kilograms of composition, fifteen processes carried out separately or together or in part-M1Kilogram working medium pressure increasing process 12,M1Kilogram working medium endothermic process 2b, (M)1+ M) kilogram working medium endothermic vaporization process b3, M2Pressure-increasing process of working medium kilogram 8a, heat-releasing condensation process of working medium M kilogram ab (M)2M) kilogram working medium pressure boosting Process a3, M3Kilogram working medium heat absorption process 34, X kilogram working medium depressurization process 47, (M)3-X) kilogram of working fluid endotherm 45, (M)3-X) decompression Process 56 with kg of working substance, (M)3-X) exothermic Process 67,M of working substance kg3Exothermic process 7f, M with kilogram of working medium2Kilogram working medium heat release process f8, M1Decompression process f9, M with kilogram working medium1Kilogram working medium heat release condensation process 91-a closed process of composition; wherein M is3Is M1And M2And (4) summing.
5. Single working medium steam combined cycle, is formed from M1Kilogram and M2Kilogram formed working medium, nine processes carried out separately or together-M1Boosting process of working medium kilogram 12,M1The kilogram working medium absorbs heat and is vaporized 23,M2Kilogram working medium boosting process f3, M334, M kilogram working medium heat absorption process345, M in kilogram working medium depressurization process3The exothermic process of kilogram working medium is 5f1Kilogram working medium heat release process f6, M1Decompression process with kilogram working medium 67,M1Kilogram working medium exothermic condensation process 71-a closed process of composition; wherein, M3Is M1And M2And (4) summing.
6. Single working medium steam combined cycle, meaning consisting of M1Kilogram and M2Working medium composed of kilograms of composition, twelve processes carried out separately or together or in part-M1Kilogram working medium pressure increasing process 12,M1Kilogram working medium heat absorption vaporization process 23,M2Kilogram working medium boosting process f3, M334 kilogram working medium heat absorption process, 47X kilogram working medium pressure reduction process, (M)3-X) kilogram of working fluid endotherm 45, (M)3-X) decompression Process 56 with kg of working substance, (M)3-X) exothermic process 67,M of kg working medium3Exothermic process 7f, M with kilogram of working medium1Kilogram working medium heat release process f8, M1Pressure reduction by kilogram of working mediumIn a process 89, M1Kilogram working medium heat release condensation process 91-a closed process of composition; wherein M is3Is M1And M2And (4) summing.
7. Single working medium steam combined cycle, meaning consisting of M1Kilogram and M2Working medium composed of kilograms of composition, twelve processes carried out separately or together or in part-M1Kilogram working medium pressure increasing process 12,M1Kilogram working medium endothermic process 2b, (M)1+ M) kilogram working medium endothermic vaporization process b3, M2Fa in kilogram working medium boosting process, ab in M kilogram working medium heat releasing condensation process, (M)2M) kg working medium pressure increase Process a3, M334, M kilogram working medium heat absorption process345, M step-down process of kilogram working medium3The exothermic process of kilogram working medium is 5f1Kilogram working medium heat release process f6, M1Decompression process with kilogram working medium 67,M1Kilogram working medium exothermic condensation process 71-a closed process of composition; wherein M is3Is M1And M2And (4) summing.
8. Single working medium steam combined cycle, is formed from M1Kilogram and M2Working medium composed of kilograms of composition, fifteen processes carried out separately or together or in part-M1Boosting process of working medium kilogram 12,M1Kilogram working medium heat absorption process 2b, (M)1+ M) kilogram working medium endothermic vaporization process b3, M2Fa in kilogram working medium boosting process, ab in M kilogram working medium heat releasing condensation process, (M)2M) kg working medium pressure increase Process a3, M3Kilogram working medium heat absorption process 34, X kilogram working medium depressurization process 47, (M)3-X) kilogram of working fluid endotherm 45, (M)3-X) kg working medium depressurization 56, (M)3-X) exothermic Process 67,M of working substance kg3Exothermic process 7f, M with kilogram of working medium1Kilogram working medium heat release process f8, M1Decompression process 89, M with kilogram working medium1Kilogram working medium heat release condensation process 91-a closed process of composition; wherein M is3Is M1And M2And (4) the sum.
CN202010945851.9A 2019-09-04 2020-09-02 Single working medium steam combined cycle Pending CN115263474A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910878664 2019-09-04
CN2019108786640 2019-09-04

Publications (1)

Publication Number Publication Date
CN115263474A true CN115263474A (en) 2022-11-01

Family

ID=74852048

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010945851.9A Pending CN115263474A (en) 2019-09-04 2020-09-02 Single working medium steam combined cycle

Country Status (2)

Country Link
CN (1) CN115263474A (en)
WO (1) WO2021042648A1 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795103A (en) * 1971-09-30 1974-03-05 J Anderson Dual fluid cycle
CN1891981A (en) * 2005-07-04 2007-01-10 陈培豪 Thermodynamic cycle and device
US9284857B2 (en) * 2012-06-26 2016-03-15 The Regents Of The University Of California Organic flash cycles for efficient power production
US9038390B1 (en) * 2014-10-10 2015-05-26 Sten Kreuger Apparatuses and methods for thermodynamic energy transfer, storage and retrieval
US11008898B2 (en) * 2016-10-12 2021-05-18 Huayu Li Single working-medium vapor combined cycle and vapor power device for combined cycle
CN108019245B (en) * 2016-12-15 2020-05-29 李华玉 Multiple combined cycle power plant
CN108119195B (en) * 2016-12-20 2020-05-01 李华玉 Combined cycle power plant
CN108679880B (en) * 2017-03-30 2021-07-27 李华玉 Double-working medium combined cycle compression heat pump
CN108798808B (en) * 2018-06-11 2021-07-23 山东理工大学 CO for recovering waste heat of high-temperature flue gas２Cyclic cogeneration system

Also Published As

Publication number Publication date
WO2021042648A1 (en) 2021-03-11

Similar Documents

Publication Publication Date Title
CN111608756A (en) Single working medium steam combined cycle
CN111636935A (en) Single working medium steam combined cycle
CN115263474A (en) Single working medium steam combined cycle
CN115263475A (en) Single working medium steam combined cycle
WO2020215816A1 (en) Single working medium-vapor combined cycle
CN115263469A (en) Single working medium steam combined cycle
CN115263462A (en) Single working medium steam combined cycle
CN115263473A (en) Single working medium steam combined cycle
WO2020215813A1 (en) Single work medium steam combined cycle
CN111636936A (en) Single working medium steam combined cycle
CN111608757A (en) Single working medium steam combined cycle
CN111608758A (en) Single working medium steam combined cycle
WO2021036152A1 (en) Single working medium steam combined cycle
WO2020215817A1 (en) Single working medium vapor combined cycle
CN111608754A (en) Single working medium steam combined cycle
CN111561367A (en) Single working medium steam combined cycle
CN113623037A (en) Combined cycle of single working medium of the second kind
CN113587478A (en) Combined cycle of single working medium of the second kind
CN113587475A (en) Combined cycle of single working medium of the second kind
CN113587479A (en) Combined cycle of single working medium of the second kind
CN113638783A (en) Combined cycle of single working medium of the second kind
CN115264981A (en) Reverse single working medium steam combined cycle
CN113623886A (en) Combined cycle of single working medium of the second kind
CN113623885A (en) Combined cycle of single working medium of the second kind
CN113587480A (en) Combined cycle of single working medium of the second kind

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination