CN107364564A - The absorption CO for cooperateing with auxiliary to be subcooled with thermoelectric cooling2Marine refrigeration system - Google Patents

The absorption CO for cooperateing with auxiliary to be subcooled with thermoelectric cooling2Marine refrigeration system Download PDF

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Publication number
CN107364564A
CN107364564A CN201710599006.9A CN201710599006A CN107364564A CN 107364564 A CN107364564 A CN 107364564A CN 201710599006 A CN201710599006 A CN 201710599006A CN 107364564 A CN107364564 A CN 107364564A
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China
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evaporator
generator
refrigerant
absorber
outlet
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CN201710599006.9A
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CN107364564B (en
Inventor
代宝民
刘圣春
王海丹
李晓欢
刘坤
张梦华
常虹
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Tianjin University of Commerce
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Tianjin University of Commerce
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/12—Heating; Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/12—Heating; Cooling
    • B63J2002/125—Heating; Cooling making use of waste energy
    • 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
    • Y02T70/00—Maritime or waterways transport

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Abstract

The invention discloses a kind of absorption CO for cooperateing with auxiliary to be subcooled with thermoelectric cooling2Marine refrigeration system.Absorber taphole of the present invention is connected by solution pump with generator solution inlet, and the outlet of generator refrigerant vapour connects the refrigerant inlet of evaporator two, the refrigerant outlet of evaporator two connection absorber with decompression valve by condenser；Generator connects absorber by choke valve；Compressor outlet, gas cooler, thermoelectricity subcooler, evaporator two, expanding machine and the import of evaporator one are sequentially connected, the outlet of evaporator one connection compressor inlet；Power supervisor connects expanding machine and thermoelectricity subcooler respectively.The present invention to waste heat overbottom pressure by recycling the CO that can export gas cooler2Cooling, it is easy to accomplish, and its temperature can be down to below environment temperature, high pressure CO can be substantially reduced2Irreversible loss in throttling process.

Description

The absorption CO for cooperateing with auxiliary to be subcooled with thermoelectric cooling2Marine refrigeration system
Technical field
The present invention relates to sorption type refrigerating technology and thermoelectric cooling technical field, more particularly to a kind of absorption refrigeration with it is swollen The CO of swollen machine collaboration auxiliary supercooling2Trans-critical cycle kind of refrigeration cycle foreign-going ship refrigeration system.
Background technology
The world today, the available mankind are mostly non-renewable resources, progressively occur the different degrees of energy all over the world Crisis.In recent years, international oil price fluctuation.The excessive use of other fossil energy, the ring for making the mankind depend on for existence and development Border is by very big destruction.Thus, energy-conserving and environment-protective turn into the much-talked-about topic of current era.Foreign-going ship has necessarily special Property, on the one hand, its huge energy consumption, the marine main engine thermal efficiency is not high, and there is substantial amounts of energy waste phenomenon；On the other hand, it is long Time away from land, in order to store crewman's food, it is necessary to set ship food stuff refrigerated storage, further increase the consumption of the energy.Pass System compression-type refrigeration fully relies on the electric energy of generator 20% to produce refrigerating capacity, and the waste heat for still having 50% is not yet utilized, caused The waste of the energy.So foreign-going ship refrigerant system efficiency should be lifted, its operation costs is reduced, is increased economic efficiency, so as to Reach the saving energy, the purpose of environmental protection.
Under current environmental protection and energy-conservation dual-pressure, development green refrigerant is trend of the times.For current foreign-going ship Refrigeration system, the refrigerant of filling is mostly R22, and its global warming potentiality (GWP) is up to 1700, and foreign-going ship is running over journey In vibrations inevitably cause the leakage of refrigerant in refrigeration system, exacerbate greenhouse effects.In April, 2014, European Union released Use of the tightened up F-gas regulation limits high GWP refrigerant in refrigeration air-conditioner, reduce greenhouse gas emission, slow down Global warming has turned into the matter of utmost importance that global environmental protection work at this stage faces, and world community also accelerates to promote environmental-protection refrigeration Agent substitutes the process of high GWP HFC class refrigerants.Wherein, CO2Because its environment-friendly characteristic is received people's again Common concern.Professor Lorentzen of Norwegian University of Science ＆ Technology thinks CO2It is most potential natural refrigerant.CO2Have many advantages, such as： 1) it is environment-friendly, ODP=0, GWP=1；2) safe and non-toxic non-combustible, chemical property is stable；3) it is cheap easily to obtain；4) with lubricating The compatibility of oil；5) viscosity is low, thermal conductivity factor is high, has good hot physical property and flowing and heat-transfer character；6) unit volume Cooling/heating amount is higher, compared with common working medium, CO2Equipment volume more compact.However, due to CO2Critical-temperature only For 31.1 DEG C, and critical pressure is up to 7.38MPa, its operating pressure compared with it is high, restriction loss is big, cause CO2Trans critical cycle is imitated Rate is less than conventional refrigerant systems, and this is the main reason for limiting its popularization and application.
Therefore, the energy consumption of foreign-going ship refrigeration system, the latent value of filling zero ozone depletion are reduced there is an urgent need to new technology (ODP), low GWP refrigerant ensures the environment-friendly of refrigeration system.
The content of the invention
The CO of auxiliary supercooling is cooperateed with thermoelectric cooling present invention aims at a kind of absorption refrigeration of offer2Trans-critical cycle freezes Circulate foreign-going ship refrigeration system.
In order to solve problem above, the technical solution used in the present invention is：It is proposed that a kind of absorption and thermoelectric cooling is assisted With the CO of auxiliary supercooling2Marine refrigeration system, including absorption system and CO based on waste heat2Transcritical cooling system；
The absorption system based on waste heat include absorber, generator, solution pump, evaporator two, condenser, Choke valve；Boat diesel engine connects generator, and absorber taphole is connected by solution pump with generator solution inlet, occurs The outlet of device refrigerant vapour connects the refrigerant inlet of evaporator two with decompression valve by condenser, and the refrigerant of evaporator two goes out Mouth connection absorber；Generator connects absorber by choke valve；
The CO2Transcritical cooling system includes compressor, gas cooler, expanding machine and evaporator one；Compressor goes out Mouth, gas cooler, thermoelectricity subcooler, evaporator two, expanding machine and the import of evaporator one are sequentially connected, and the outlet of evaporator one connects Connect compressor inlet；Power supervisor connects expanding machine and thermoelectricity subcooler respectively.
The working medium of filling is CO in refrigeration system2, the CO of low-temp low-pressure2Steam enters compressor air suction mouth, by compressor pressure HTHP supercritical fluid is reduced to, into gas cooler heat release, a little higher than environment temperature of refrigerant temperature now.It is laggard Enter CO2Cooling evaporator and the refrigerant of auxiliary circulation are exchanged heat, and are changed into low-temp low-pressure after choke valve expansion throttling Gas-liquid two-phase fluid, the heat in compartment is absorbed into evaporator, then into compressor, complete kind of refrigeration cycle.
CO2For supercritical fluid when by expanding machine, externally acting is changed into the gas-liquid two-phase fluid of low-temp low-pressure, while defeated Go out electrical energy drive thermoelectricity subcooler.Thermoelectricity subcooler is a kind of semiconductor cooling device based on peltier effect, is powered and makes It is cold.Thermoelectricity subcooler and the cold one of absorption system output are all the CO of air cooler outlet2It is subcooled.
The present invention has the advantages and positive effects of：
(1) refrigerant of refrigeration system is natural refrigerant CO2。CO2GWP be 1, ODP 0, it is safe and non-toxic non-combustible, honest and clean Valency easily obtains, and is environment-friendly refrigerant, compared with the refrigerant that existing foreign-going ship uses, alleviates greenhouse effect significantly Should, environment-friendly advantage is obvious.
(2)CO2Relative to the refrigerant used now, the cooling condition of lower temperature is more suitable for, there is higher list The charging amount of position volume refrigerating capacity compressor, the volume of compressor and refrigerant reduces, and reduces the weight and ship of refrigeration system Weight, so as to reduce the oil consumption of foreign-going ship.
(3) cooperateed with using absorption refrigeration with expanding machine and the refrigerant of gas cooler outlet is subcooled, by right Waste heat overbottom pressure recycles the CO that can export gas cooler2Cooling, it is easy to accomplish, and its temperature can be down to ring Below the temperature of border, high pressure CO can be substantially reduced2Irreversible loss in throttling process.
Brief description of the drawings
Fig. 1 is the system schematic of the present invention.
In figure：1st, compressor；2nd, gas cooler；3rd, expanding machine；4th, evaporator one；5th, thermoelectricity subcooler；6th, power supply pipe Manage device；7th, evaporator two；8th, absorber；9th, solution pump；10th, choke valve；11st, generator；12nd, condenser；13rd, decompression regulation Valve；14th, boat diesel engine.
Embodiment
For present disclosure, feature and effect can be further appreciated that, following examples are hereby enumerated, and coordinate accompanying drawing detailed It is described as follows：
As shown in figure 1, the present invention includes absorption system and CO based on waste heat2Transcritical cooling system；
Absorption system based on waste heat includes absorber 8, generator 11, solution pump 9, evaporator 27, condenser 12nd, choke valve 10；Boat diesel engine 14 connects generator 11, and the taphole of absorber 8 passes through solution pump 9 and the solution of generator 11 Entrance connects, and the outlet of the refrigerant vapour of generator 11 connects the refrigerant of evaporator 27 by condenser 12 and decompression valve 13 Entrance, the refrigerant outlet of evaporator 27 connection absorber 8；Generator 11 connects absorber 8 by choke valve 10；With ship bavin Driving heat source of the oil machine Diesel engine diesel coolant as absorption system, what the cold of output exported to gas cooler CO2It is subcooled.
CO2Transcritical cooling system includes compressor 1, gas cooler 2, expanding machine 3 and evaporator 1；Compressor 1 goes out Mouth, gas cooler 2, thermoelectricity subcooler 5, evaporator 27, expanding machine 3 and the import of evaporator 1 are sequentially connected, evaporator 1 The outlet connection import of compressor 1；Power supervisor 6 connects expanding machine 3 and thermoelectricity subcooler 5 respectively.
The working medium of filling is CO in refrigeration system2, the CO of low-temp low-pressure2Steam enters compressor air suction mouth, by compressor pressure HTHP supercritical fluid is reduced to, into gas cooler heat release,
The present embodiment cooperates with the CO that auxiliary is subcooled on absorption refrigeration with expanding machine2Trans-critical cycle kind of refrigeration cycle foreign-going ship The operation principle of refrigeration system is：
First stage：Gas-liquid two-phase CO2Fluid enters 1 (compressor) boil down to HTHP after the heat absorption of evaporator 1 Fluid, subsequently into gas cooler 2 to surrounding environment heat release, now postcritical CO2The temperature of fluid is slightly above environment temperature Degree.
Second stage：The CO that thermoelectricity subcooler 5 exports from gas cooler2Heat is absorbed in fluid, is realized to CO2Fluid Supercooling；Heated using the waste heat of boat diesel engine 14 in generator 11 by solution pump 9 and absorber 8 convey come have one Determine the solution of concentration, and most of low boiling point refrigerant in solution is evaporated.Refrigerant vapour enters in condenser 12, The medium that is cooled again is condensed into refrigerant liquid, then is depressured to evaporating pressure through decompression valve 13.Refrigerant warp knuckle stream enters In evaporator 27, absorb from the heat in the CO2 fluids of thermoelectricity subcooler outlet and be excited into the steaming of the refrigerant under evaporating pressure Gas, realize secondary supercooling；Evaporating pressure is dropped to through the remaining solution of generating process through choke valve 10 enter absorption in generator 11 In device, the low-pressure refrigerant vapor with being come out from evaporator mixes, and absorbs low-pressure refrigerant vapor and return to original Concentration, it is sent into generator and continues cycling through after being boosted by solution pump 9.Now CO2For the gas of cryogenic high pressure.
Phase III：The gas of cryogenic high pressure enters expanding machine 3, external expansion work, exports electric energy, is stored in power supply In manager 6, coordinate the distribution of electric energy by power supervisor, for driving thermoelectricity subcooler.
Fourth stage：The low-temp low-pressure two-phase fluid come out from expanding machine 3 is again introduced into evaporator and absorbs heat, so as to complete Into the circulation of whole system.
Although the preferred embodiments of the present invention are described above in conjunction with accompanying drawing, the invention is not limited in upper The embodiment stated, above-mentioned embodiment is only schematical, be not it is restricted, this area it is common Technical staff in the case of present inventive concept and scope of the claimed protection is not departed from, may be used also under the enlightenment of the present invention By make it is many in the form of, these are belonged within protection scope of the present invention.

Claims (1)

  1. A kind of 1. absorption CO for cooperateing with auxiliary to be subcooled with thermoelectric cooling2Marine refrigeration system, it is characterized in that, including based on waste heat Absorption system and CO2Transcritical cooling system；
    The absorption system based on waste heat includes absorber, generator, solution pump, evaporator two, condenser, throttling Valve；Boat diesel engine connects generator, and absorber taphole is connected by solution pump with generator solution inlet, generator system Refrigerant vapor outlet connects the refrigerant inlet of evaporator two with decompression valve by condenser, and the refrigerant outlet of evaporator two connects Connect absorber；Generator connects absorber by choke valve；
    The CO2Transcritical cooling system includes compressor, gas cooler, expanding machine and evaporator one；Compressor outlet, gas Body cooler, thermoelectricity subcooler, evaporator two, expanding machine and the import of evaporator one are sequentially connected, the outlet of evaporator one connection pressure Contracting machine import；Power supervisor connects expanding machine and thermoelectricity subcooler respectively.
CN201710599006.9A 2017-07-21 2017-07-21 Absorption-type and thermoelectric refrigeration CO-assisted supercooling CO 2 Refrigerating system for ship Active CN107364564B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109506391A (en) * 2018-12-21 2019-03-22 天津商业大学 Thermal drivers are without the Trans-critical cycle CO for pumping absorption auxiliary supercooling2Refrigeration system
CN109974322A (en) * 2019-04-18 2019-07-05 天津商业大学 A kind of dual-temperature zone single grade refrigeration system with expanding machine

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WO2015196883A1 (en) * 2014-06-23 2015-12-30 周永奎 Refrigeration-power combined supply method of absorption type heat pump
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CN109506391A (en) * 2018-12-21 2019-03-22 天津商业大学 Thermal drivers are without the Trans-critical cycle CO for pumping absorption auxiliary supercooling2Refrigeration system
CN109974322A (en) * 2019-04-18 2019-07-05 天津商业大学 A kind of dual-temperature zone single grade refrigeration system with expanding machine
CN109974322B (en) * 2019-04-18 2024-03-26 天津商业大学 Double-temperature-zone single-stage refrigerating system with expander

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