NL2031162A - Thermodynamic circulation system utilizing ocean temperature-difference energy - Google Patents

Thermodynamic circulation system utilizing ocean temperature-difference energy Download PDF

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Publication number
NL2031162A
NL2031162A NL2031162A NL2031162A NL2031162A NL 2031162 A NL2031162 A NL 2031162A NL 2031162 A NL2031162 A NL 2031162A NL 2031162 A NL2031162 A NL 2031162A NL 2031162 A NL2031162 A NL 2031162A
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NL
Netherlands
Prior art keywords
turbine
evaporator
gas
condenser
preheater
Prior art date
Application number
NL2031162A
Other languages
Dutch (nl)
Inventor
Liu Lei
Peng Jingping
Ge Yunzheng
Chen Fengyun
Liu Weimin
Original Assignee
First Institute Of Oceanography Mini Of Natural Resources
Qingdao Ocean Engineering Survey And Design Res Institute Co Ltd
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Application filed by First Institute Of Oceanography Mini Of Natural Resources, Qingdao Ocean Engineering Survey And Design Res Institute Co Ltd filed Critical First Institute Of Oceanography Mini Of Natural Resources
Publication of NL2031162A publication Critical patent/NL2031162A/en

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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
    • F01K25/06—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using mixtures of different fluids
    • F01K25/065—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using mixtures of different fluids with an absorption fluid remaining at least partly in the liquid state, e.g. water for ammonia
    • 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
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • 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
    • F01K13/00—General layout or general methods of operation of complete plants
    • 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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/006—Auxiliaries or details not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
    • F03G7/05—Ocean thermal energy conversion, i.e. OTEC
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Oceanography (AREA)
  • Sustainable Development (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention relates to a thermodynamic circulation system utilizing ocean temperature-difference energy, which is characterized in that it comprises an evaporator, a gas-liquid separator, a preheater, a first turbine, a second turbine, an absorber and a condenser, wherein the evaporator is located on the surface layer of the ocean, and the condenser is located at a set distance below the evaporator which is connected with the gas-liquid separator, the gas-liquid separator is connected with the first turbine and the preheater respectively through a pipeline, the preheater is connected with the second turbine, the evaporator and the condenser respectively through a pipeline, a gas-phase working medium vapour separated by the gas-liquid separator enters the first turbine to work, and a liquid separated by the gas-liquid separator enters the second turbine to work, after passing through the preheater. The invention improves the utilization rate of energy.

Description

THERMODYNAMIC CIRCULATION SYSTEM UTILIZING OCEAN
TEMPERATURE-DIFFERENCE ENERGY
TECHNICAL FIELD
[01] The invention relates to the technical field of thermodynamic circulation, particularly relates to a thermodynamic circulation system utilizing ocean temperature- difference energy.
BACKGROUND ART
[02] The essence of ocean temperature-difference energy conversion is to convert solar energy stored in seawater into electric energy. The ocean covers about 71 percent of the earth's surface and hence it is a huge solar energy receiver. The ocean is a huge carrier of renewable energy on the earth, while in many types of ocean energy, the temperature-difference energy is a renewable energy with the largest reserve. At present, the efficiency of thermodynamic circulation utilizing ocean temperature-difference energy to generate electricity needs to be further improved.
SUMMARY
[03] The invention aims at providing a thermodynamic circulation system utilizing ocean temperature-difference energy so as to enhance the utilization rate of energy.
[04] To achieve the foregoing object, the invention provides schemes as follows:
[05] A thermodynamic circulation system utilizing ocean temperature-difference energy comprises an evaporator, a gas-liquid separator, a preheater, a first turbine, a second turbine, an absorber and a condenser;
[06] The evaporator is located on the surface layer of the ocean, and the condenser is located at a set distance below the evaporator which is connected with the gas-liquid separator; the gas-liquid separator is connected with the first turbine and the preheater respectively through a pipeline; the preheater is connected with the second turbine, the evaporator and the condenser respectively through a pipeline; the input of the absorber is connected with the first turbine and the second turbine respectively through a pipeline; the output of the absorber is connected with the condenser through a pipeline; a gas- phase working medium vapour separated by the gas-liquid separator enters the first turbine to work; and a liquid separated by the gas-liquid separator enters the second turbine to work, after passing through the preheater.
[07] Optionally, a working medium in the pipelines is a non-azeotropic working medium.
[08] Optionally, the system also comprises a first water pump which is connected with the evaporator and used for providing thermal energy for the evaporator.
[09] Optionally, the system further comprises a second water pump which is connected with the condenser.
[10] Optionally, the system furthermore comprises a working medium pump, the input end of which is connected with the condenser, and the output end thereof is connected with the preheater.
[11] In accordance with the specific embodiments provided by the invention, the invention discloses the following technical effects:
[12] The evaporator is located on the surface layer of the ocean; the condenser is located at a set distance below the evaporator; by virtue of the pressure difference between the evaporator and the condenser, a liquid discharged from the evaporator to the condenser generates a flow velocity, thereby generating a kinetic energy; and then the generated kinetic energy can generate electricity through the second turbine.
Therefore, the kinetic energy generated by the liquid discharged from the evaporator to the condenser is utilized and accordingly the utilization rate of energy is improved.
BRIEF DESCRIPTION OF THE DRAWINGS
[13] In order to more clearly explain the technical schemes in the embodiments of the invention or the prior art, the drawings required to be used in the embodiments will be briefly described below, and apparently the drawings in the following description are only some embodiments of the invention, according to which, a person of ordinary skill in the art can also obtain other drawings without creative labour.
[14] FIG 1 is a structural schematic view of a thermodynamic circulation system utilizing ocean temperature-difference energy
[15] List of reference signs: A- heating part, B- thermodynamic circulation part, C- cooling part, 1- first water pump, 2- evaporator, 3- gas-liquid separator, 4- first turbine, 5- second turbine, 6- absorber, 7- preheater, 8- Working medium pump, 9- condenser, 10- second water pump
DETAILED DESCRIPTION OF THE EMBODIMENTS
[16] The following will clearly and completely describe the technical schemes in the embodiments of the invention with reference to the drawings in the embodiments of the invention, and apparently the described embodiments are merely part of rather than all embodiments of the invention. All other embodiments which are obtained based on the embodiments of the invention by a person of ordinary skill in the art without creative labour should fall within the protection scope of the invention.
[17] The invention aims at providing a thermodynamic circulation system utilizing ocean temperature-difference energy so as to enhance the utilization rate of energy.
[18] To make the objects, features and advantages of the invention more apparent and easier to understand, the invention will be further described in detail with reference to drawings and specific embodiments.
[19] FIG. 1 is a structural schematic view of a thermodynamic circulation system utilizing ocean temperature-difference energy, and as illustrated in FIG. 1, the system comprises a heating part A, a thermodynamic circulation part B and a cooling part C.
The heating part A comprises a first water pump 1 (warm seawater pump) and an evaporator 2; the thermal circulation part B comprises a gas-liquid separator 3, a preheater 7, a first turbine 4, a second turbine 5 (dilute solution turbine), an absorber 6 and a working medium pump 8; the cooling part C comprises a condenser 9 and a second water pump 10 (cold seawater pump).
[20] The evaporator 2 is located on the surface layer of the ocean where the seawater is about 26 degrees in temperature, the condenser 9 is located at a set distance below the evaporator 2, and the temperature of the seawater used by the condenser 9 is about 5 degrees; the evaporator 2 1s connected with the gas-liquid separator 3; the gas-liquid separator 3 is connected with the first turbine 4 and the preheater 7 respectively through a pipeline; the preheater 7 is connected with second turbine 5, the evaporator 2 and the condenser 9 respectively through a pipeline; the input of the absorber 6 is connected with the first turbine 4 and the second turbine 5 respectively through a pipeline; the output of the absorber 6 is connected with the condenser 9 through a pipeline; a gas- phase working medium vapour separated by the gas-liquid separator 3 enters the first turbine 4 to work; and a liquid separated by the gas-liquid separator 3 enters the second turbine 5 to work, after passing through the preheater 7.
[21] A working medium in the pipelines is a non-azeotropic working medium.
[22] As a specific embodiment:, the working medium in the pipelines is an ammonia water mixture.
[23] The first water pump 1 is connected with the evaporator 2 and used for providing thermal energy for the evaporator 2.
[24] The second water pump 10 is connected with the condenser 9.
[25] The input end of the working medium pump 8 is connected with the condenser 9, and the output end thereof is connected with the preheater 7.
[26] The working principle of the invention: Heated by the surface layer warm seawater in the evaporator 2, the working medium becomes a gas-liquid two-phase mixed solution; the gas-liquid two-phase mixture is separated to a gas phase and a liquid phase in the gas-liquid separator 3; the gas-phase working medium vapour enters the first turbine 4 to work, and the liquid-phase working medium solution passes through the preheater 7 and then enters the second turbine 5 to work; the working mediums respectively passing through the first turbine 4 and the second turbine 5 enter the absorber 6; and subsequently, the working mediums output from absorber 6 are condensed by the cold seawater in the condenser 9, and then return to evaporator 2 through the working medium pump 8.
[27] The evaporator 2 is located on the surface layer of the ocean; the condenser 9 is located at a set distance below the evaporator 2; by virtue of the pressure difference between the evaporator 2 and the condenser 9, a liquid discharged from the evaporator 2 to the condenser 9 generates a flow velocity, thereby generating a kinetic energy; and then the generated kinetic energy can generate electricity through the second turbine 5.
Therefore, the kinetic energy generated by the liquid discharged from the evaporator 2 to the condenser 9 is utilized and accordingly the utilization rate of energy of the thermodynamic circulation system is improved.
[28] All embodiments in this specification are described in a progressive manner, each embodiment focuses on the differences from the other embodiments, and the same and similar parts among all embodiments can be referred to each other.
[29] The principle and embodiments of the invention are set forth by employing specific examples herein, and the explanation of the above embodiments is only used to help understand the methods and core ideas of the invention. Meanwhile, a person of ordinary skill in the art can make some changes in the specific embodiments and application scope according to the ideas of the invention. In conclusion, the contents of the specification should not be understood as a limitation of the invention.

Claims (5)

Conclusies l. Thermodynamisch circulatiesysteem dat oceaantemperatuurverschilenergie gebruikt, met het kenmerk dat het een verdamper, een gasvloeistofscheider, een voorverwarmer, een eerste turbine, een tweede turbine, een adsorbeermiddel en een condensor omvat, waarbij de verdamper zich op een oppervlaklaag van de oceaan bevindt en de condensor zich op een afstand onder de verdamper bevindt die verbonden is met de gasvloeistofscheider; waarbij de gasvloeistofscheider respectievelijk verbonden is met de eerste turbine en de voorverwarmer via een pijplijn; waarbij de voorverwarmer respectievelijk verbonden is met de tweede turbine, de verdamper en de condensor via een pijplijn; waarbij de invoer van het adsorbeermiddel respectievelijk verbonden is met de eerste turbine en de tweede turbine via een pijplijn, waarbij de uitvoer van het adsorbeermiddel verbonden is met de condensor via een pijplijn; waarbij een gasfasewerkingsmediumdamp die door de gasvloeistofscheider gescheiden is de eerste turbine binnengaat om te werken; en waarbij een vloeistof die gescheiden is door de gasvloeistofscheider de tweede turbine binnengaat om te werken, na het passeren door de voorverwarmer.Conclusions l. Thermodynamic circulation system using ocean temperature difference energy, characterized in that it comprises an evaporator, a gas liquid separator, a preheater, a first turbine, a second turbine, an adsorbent and a condenser, the evaporator being located on a surface layer of the ocean and the condenser being located located at a distance below the evaporator connected to the gas-liquid separator; wherein the gas-liquid separator is respectively connected to the first turbine and the preheater via a pipeline; wherein the preheater is respectively connected to the second turbine, the evaporator and the condenser via a pipeline; wherein the input of the adsorbent is connected to the first turbine and the second turbine respectively through a pipeline, the output of the adsorbent is connected to the condenser through a pipeline; wherein a gas phase operating medium vapor separated by the gas liquid separator enters the first turbine to operate; and wherein a liquid separated by the gas-liquid separator enters the second turbine for operation after passing through the preheater. 2. Thermodynamisch circulatiesysteem dat oceaantemperatuurverschilenergie gebruikt, volgens conclusie 1, met het kenmerk dat het werkingsmedium in de pijplijnen een ammoniakwatermengsel is.A thermodynamic circulation system using ocean temperature difference energy, according to claim 1, characterized in that the working medium in the pipelines is an ammonia water mixture. 3. Thermodynamisch circulatiesysteem dat oceaantemperatuurverschilenergie gebruikt, volgens conclusie 1, met het kenmerk dat het ook een eerste waterpomp omvat en waarbij de eerste waterpomp verbonden is met de verdamper en gebruikt wordt voor het verschaffen van thermische energie voor de verdamper.A thermodynamic circulation system using ocean temperature difference energy according to claim 1, characterized in that it also includes a first water pump and wherein the first water pump is connected to the evaporator and used to provide thermal energy for the evaporator. 4. Thermodynamisch circulatiesysteem dat oceaantemperatuurverschilenergie gebruikt, volgens conclusie 1, met het kenmerk dat het verder een tweede waterpomp omvat en waarbij de tweede waterpomp verbonden is met de condensor.The thermodynamic circulation system using ocean temperature difference energy according to claim 1, characterized in that it further comprises a second water pump and wherein the second water pump is connected to the condenser. 5. Thermodynamisch circulatiesysteem dat oceaantemperatuurverschilenergie gebruikt, volgens conclusie 1, met het kenmerk dat het verder een werkingsmediumpomp omvat, waarbij het invoereinde van de werkingsmediumpomp verbonden is met de condensor en het uitvoereinde daarvan verbonden is met de voorverwarmer.The thermodynamic circulation system using ocean temperature difference energy according to claim 1, characterized in that it further comprises a working medium pump, the input end of the working medium pump being connected to the condenser and the output end thereof being connected to the preheater.
NL2031162A 2022-01-20 2022-03-04 Thermodynamic circulation system utilizing ocean temperature-difference energy NL2031162A (en)

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