WO2011150940A1 - Système de refroidissement et mélange non azéotrope de fluides frigorigènes constitué de fluides frigorigènes respectueux de l'environnement - Google Patents

Système de refroidissement et mélange non azéotrope de fluides frigorigènes constitué de fluides frigorigènes respectueux de l'environnement Download PDF

Info

Publication number
WO2011150940A1
WO2011150940A1 PCT/DK2011/050193 DK2011050193W WO2011150940A1 WO 2011150940 A1 WO2011150940 A1 WO 2011150940A1 DK 2011050193 W DK2011050193 W DK 2011050193W WO 2011150940 A1 WO2011150940 A1 WO 2011150940A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
mixture
refrigerants
azeotropic
cooling system
Prior art date
Application number
PCT/DK2011/050193
Other languages
English (en)
Inventor
Lars Ole Jensen
Hans Jørgen Nielsen
Tove Tækker Svendsen
Original Assignee
Arctiko A/S
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 Arctiko A/S filed Critical Arctiko A/S
Publication of WO2011150940A1 publication Critical patent/WO2011150940A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
    • C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
    • C09K5/042—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising compounds containing carbon and hydrogen only
    • 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
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/006—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant containing more than one component
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/34—The mixture being non-azeotropic

Definitions

  • the present invention relates to a cooling system comprising at least one compressor, at least one condenser, at least a first heat exchanger, at least one flow restriction and at least one evaporator, which cooling system comprises a first non-azeotropic mixture of refrigerants, which non-azeotropic mixture comprises at least the following main components, R600, Butane, R600a, Isobutane and R1150, Etylene, which main com- ponents belongs to a group of environmentally friendly refrigerants.
  • the present invention further relates to a non-azeotropic refrigerant mixture of environmentally friendly refrigerants comprises a first main group of refrigerants, which first main group comprises at least a mixture of the following refrigerants, R600, Bu- tane, R600a, Isobutane, and Rl 150, Etylene.
  • US 2008/0302116 concern a refrigerating control system using a non-azeotropic refrigerant, on a single-stage type refrigerating system using non-azeotropic refrigerant, composing with a compressor, a condenser, and an evaporator, heat exchanging between returned-refrigerant from evaporator and high-pressure refrigerant toward evaporator, electromagnetic valves of capillary tubes as expansion valves of evaporator are fully open, at moments of large load needed such as at starting up, the system is controlled flux of refrigerant gas and pressure of it by closing them one by the other corresponding to going down of interior room temperature. As the state of interior room temperature is high and low boiling point constituent is not condensed, cooling capability of high boiling point refrigerant performs in maximum.
  • US 7624586 concerns refrigerant circuit for freezing device comprises non-azeotropic refrigerant mixture of pentafluoropropane, butane, trifluoromethane and tetra- fluoromenthane; or pentafluoropropane, butane, hexafluoroethane and tetrafluoromen- thane.
  • An object is to provide a freezing device in which a safely-treatable incombustible mixed refrigerant can be used and which can realize an extremely low temperature of -85° C. or less in chamber by a simple structure.
  • the freezing device comprises a single refrigerant circuit in which the refrigerant discharged from a compressor is con- densed and thereafter are evaporated to exert a cooling function and which allows heat exchange between the evaporated refrigerant and the condensed refrigerant, wherein there is introduced into the refrigerant circuit a non-azeotropic mixed refrigerant containing R245fa, R600, R23 and R14; a non-azeotropic mixed refrigerant containing R245fa, R600, R116 and R14; a non-azeotropic mixed refrigerant containing R245fa, R600, R508A and R14; or a non-azeotropic mixed refrigerant containing R245fa, R600, R508B and R14.
  • US 7 299 653 concerns a refrigerator system using non-azeotropic refrigerant, and non-azeotropic refrigerant for very low temperature used for the system.
  • a single-stage refrigerating system includes a compressor, a condenser, an evaporator, and a heat exchanger for exchanging heat between a refrigerant in a path from the evaporator to the compressor and a refrigerant in another path from the condenser to the evaporator, and a non-azeotropic refrigerant mixture used in the system.
  • the refrigerant mixture is a combination of a refrigerant having a normal boiling point of approximately room temperature and a low-boiling-point refrigerant having a normal boiling point below - 60° C.
  • a dew point of the refrigerant mixture at a pressure in the condensing process after the compression is above room temperature.
  • the boiling point is higher than the dew point at a pressure in the lower-pressure region in a path from the evaporator to the compressor.
  • the combination may include butane or isobutane as the high-boiling- point refrigerant component having a normal boiling point of approximately room temperature and having a low evaporating pressure and ethane or ethylene as the low- boiling-point refrigerant component suitable for achieving ultra-low temperature.
  • US 6 495 061 concern refrigerant for providing ultra- low temperature.
  • a mixed refrig- erant comprising one member selected from R-23, R-116 and a mixture thereof and one member selected from propane, butane and a mixture thereof.
  • the mixed refrigerant allows cooling the inside of a freezer to a super low temperature, particularly to a temperature of -60° C. or lower, with a compressor of a conventional freezer.
  • the mixed refrigerant not only has a low boiling point similar to those of R-23 and R-l 16, but also can be liquefied in a room temperature surrounding due to propane or butane contained therein, and further has good miscibility with a lubricating oil or the like so that a freezer unit using the refrigerant is free from the problem of clogging therein. Additionally, the mixed refrigerant has no ability to deplete ozone and is significantly low with respect to greenhouse effect.
  • the refrigerant can be liquefied by a pressure within the range of practical ability of a compressor in a room temperature surrounding and allows achieving with ease a temperature inside a freezer of -60° C. or lower by means of a freezer unit using one gas and one compressor.
  • EP 1 775 333 Al concerns a freezing device in which a safely-treatable incombustible mixed refrigerant can be used and which can realize an extremely low temperature of - 85A°C or less in chamber by a simple structure.
  • the freezing device comprises a single refrigerant circuit in which the refrigerant discharged from a compressor is condensed and thereafter evaporated to exert a cooling function and which allows heat exchange between the evaporated refrigerant and the condensed refrigerant, wherein there is introduced into the refrigerant circuit a non-azeotropic mixed refrigerant containing R245fa, R600, R23 and R14; a non-azeotropic mixed refrigerant containing R245fa, R600, R116 and R14; a non-azeotropic mixed refrigerant containing R245fa, R600, R508A and R14; or a non-azeotropic mixed refrigerant containing R245fa, R600, R50
  • EP 1 491 608 Bl concerns refrigerant mixture and refrigeration cycle apparatus using the same. If a refrigerant mixture of carbon dioxide (R744) is used in a refrigeration cycle apparatus, a pressure and a discharging temperature are increased. It is an object of the present invention to solve these problems and to obtain more excellent characteristics.
  • a refrigerant mixture comprises carbon dioxide (R744) having non-azeotropic properties and hydrocarbon refrigerant comprising one of propane, cyclopropane, iso- butane and butane. If the hydrocarbon refrigerant is propane, the concentration of R744 in the entire refrigerant mixture is 30% or lower by weight.
  • the concentration of R744 in the entire refrigerant mixture is 40% or lower by weight. If the hydrocarbon refrigerant is isobutane, the concentra- tion of R744 in the entire refrigerant mixture is 60% or lower by weight. If the hydrocarbon refrigerant is butane, the concentration of R744 in the entire refrigerant mixture is 70% or lower by weight. The refrigerant mixture is charged into a refrigeration cycle apparatus.
  • JP2006000322588 concerns a_single stage type refrigerator system is composed of a heat exchanger exchanging heat between a refrigerant circulated from the compressor to a condenser, an evaporator and back to the compressor, and a refrigerant in a process of reaching the evaporator from the condenser.
  • the non-azeotropic refrigerant for use in the system is composed of the combination of a refrigerant having a standard boiling point near an ordinary temperature, and a refrigerant having a low standard boiling point of -60°C or lower.
  • a dew point of the refrigerant at the pressure in a condensing process after compression is the ordinary temperature or higher, and the boiling point at that pressure is not lower than a dew point at low pressure in a process of reaching the compressor from the evaporator.
  • butane or isobutane can be used as the refrigerant having a high boiling point near the room temperature and low steam pressure, and ethane, ethylene, or the like can be used as the refrigerant having a low boiling point suitable for ultra- low temperature.
  • JP2007000277413 concerns a ternary non-azeotropic refrigerant for ultra- low temperature service capable of offering service smoothly and stably without reconstructing the refrigerant circulation line of a conventional single-step type refrigerating system for ultra-low temperature service (unitary refrigeration circuit).
  • the non-azeotropic refrigerant for ultra-low temperature service for use in a single- step type refrigerating system contains a high boiling point gas (boiling point at Tbl), a low boiling point gas (boiling point at Tb2), and an ultra-low boiling point gas (boiling point at Tb3), wherein the boiling points of three sorts of gases meet the condition - 273°C ⁇ Tb3 ⁇ -130°C ⁇ TB2 ⁇ -20°C ⁇ TBI ⁇ +60°C.
  • the refrigerant mixtures contain refrigerants which are to be avoided because they have a very negative influence because of relative high ozone depletion potential or high global warming potential.
  • the object can be achieved by a system as described in the preamble to the claim 1 and further modified by adding at least a refrigerant, which refrigerant belongs to a group of environmentally friendly refrigerants, which refrigerant d: has a nature boiling point below - 75°C.
  • the mixture of refrigerant is a green mixture because all gasses that are contained are environmentally friendly.
  • the mixture as described it is possible to achieve a low temperature cooling system.
  • a cooling system that contains only green refrigeration components can be used and even if a leak occurs in the cooling system and the refrigerant is leaking in to the nature, the refrigerant that is released will be very environmentally friendly.
  • it is much easier to exchange the refrigerant if it is allowed to let at least smaller amount of the refrigerant flow out of a cooling system.
  • the second minor group of refrigerants can comprise at least one further refrigerant e: which refrigerant d: has a natural boiling point below - 140 °C.
  • refrigerant d has a natural boiling point below - 140 °C.
  • the refrigeration system can comprise at least one compressor, which compressor has a pressure outlet connected to a condenser, from which condenser the high pressure refrigerant flows through a heat exchanger, in which heat exchanger the high pressure refrigerant is cooled by low pressure cold refrigerant flowing back towards the suction inlet at the compressor, from which heat exchanger the high pressure refrigerant flows towards a flow restriction in form of a capillary tube, from which capillary tube the low pressure refrigerant flows through an evaporator, from which evaporator the low pressure refrigerant flows back through the heat exchanger to the suction inlet of the compressor.
  • a highly effective cooling system can be achieved that can be used e.g. in ultra low temperature freezers.
  • a cooling system is to use the system in portable freezers in a temperature area of -80 °C.
  • the cooling system can be used in upright low and ultra low temperature freezers. Further, it is possible to use the cooling system in ultra low temperature chest freezers, can be used for laboratory or pharmaceutical refrigerators and freezers.
  • Another possibility is to form a cold store room with the cooling system. This could e.g. be made in a container. In this way, it should be able to achieve a highly effective container cooling system in which container cooling system it is possible to achieve extremely low temperatures such as temperatures ranging in the area -60 °C to -80 °C.
  • the cooling system can be a single compressor system especially designed for ultra low temperature purposes. It should be possible with the single compressor system to achieve low energy consumption, low noise, and low heat dissipation. E.g. the cooling system could achieve -85°C and at the same time be equipped with a small footprint ensuring easy access to all the different storage rooms that could be accessed from the front of a freezing system.
  • the condenser can be coil formed, as many different condensers could in fact be used. But specially by using a coil formed condenser it is possible to avoid building up dust at the condenser and there is no need for cleaning of the condenser unit as such. Even after years of operation, the coil formed condenser will still be highly effective.
  • the evaporator can be formed in a number of parallel sections for shelves in a cooling shrank.
  • the freezer In e.g. upright ultra low temperature freezers, it is important that the freezer can be designed with a number of different sections which section could be accommodated from the outside one by one.
  • an evaporator In order to achieve a rapid cooling inside one of the rooms, it is very important that an evaporator is placed in each of the rooms. In that way it can be achieved that the same constant temperature occurs in freezer storage.
  • the relative big evaporator which is divided in a number of sections will result in a faster cooling down to the operational temperature, this is rather important if the temperature which has to be reached is as low as -80 °C or -90°C.
  • the object can be also be achieved by a mixture as described in the preamble to claim 6 and further modified by adding at least one refrigerant, which refrigerant belongs to a group of environmentally friendly refrigerants,: which refrigerant d: has a nature boiling point below - 75 °C.
  • the new mixture of refrigerants can be used in many different cooling systems such as low temperature cooling rooms for storage of medicine or other chemical substances typical in the temperature range from -40°C to -60°C. Another possibility is to use the new mixture of refrigerant in mobile containers for achieving temperatures at -60°C in the container. Further the composition of refrigerant can be used in all low temperature freezers.
  • the new mixture of refrigerant can be used. It should be possible to built very compact air conditioning systems with relative small evaporators by using relative low temperature evaporation of the refrigerant.
  • the very compact air condition systems could in fact be used in private homes but another possibility of using that refrigerant is in mobile air condition systems.
  • Air condition is widely used in the transportation area because air condition is now standard in most cars, trucks and also farm machinery are today equipped with air condition.
  • refrigerant compositions e.g. for car air condition simply because the mostly used refrigerant in car air condition is R134A which at this moment is allowed but in the future this particular refrigerant is most likely to be forbidden in Europe.
  • the minor group of refrigerants can comprise at least one further refrigerant e: which refrigerant d. has a natural boiling point below - 140°C.
  • the main group of refrigerants (a, b, c) can comprise more than 60% of the weight of the refrigerant mixture, which minor group of refrigerant (d, e) comprises less than 30 % of the weight of the refrigerant mixture.
  • the mixture of the refrigerants can of course be changed so that the amount of the different refrigerants is adjusted independent of the actual use of the refrigerant.
  • the object of the pending application can be achieved by a system as described in the preamble to the claim 9 and further modified by use of a non-azeotropic refrigerant mixture of environmentally friendly refrigerants in low temperature cooling systems.
  • a non-azeotropic refrigerant mixture of environmentally friendly refrigerants in low temperature cooling systems.
  • the new refrigerant mixture can be widely used in cooling systems such as low temperature storage rooms, low temperature container cooling upright low temperature freezers, low temperature chest freezers and as already described in all different aspects of air condition.
  • the non-azeotropic refrigerant mixture of environmentally friendly refrigerants can be used in container cooling systems for achieving storage temperature in container below - 60° C. Especially for containers that have been transported on lorries or on ships, it can be very important to achieve very low temperatures inside the containers. If that low temperature should be achieved by environmentally friendly refrigeration systems, it is very important to use a refrigerant as described above.
  • non-azeotropic refrigerant mixture of environmentally friendly refrigerants as described in the claims 6-8 in air condition systems.
  • the new refrigerant can be used in air condition systems.
  • the relative low temperature refriger- ant could be used in air condition systems in aeroplanes because relative small evaporators can be used.
  • Figure 1 shows a first possible embodiment of a cooling system.
  • Figure 2 shows another embodiment of the invention in the form of a cooling system with a divided evaporator.
  • Figure 3 shows a more detailed view of the top of the cooling system show at figure 2.
  • FIG. 1 shows a cooling system 2 which system comprises a compressor 4, which compressor has a pressure outlet connected to a tube 6, which tube 6 is connected to a condenser unit 8 which can be cooled by means of a blowing unit 10 and from which condensing unit a tube 12 leads high pressure refrigerant further to a coil 14. From the coil 14 where further condensing takes place, the refrigerant is flowing further into a receiver 16. Here from the refrigerant flows through a tube 18 towards a capillary tube 20 and further into an evaporator 22. The low pressure refrigerant from the evaporator is flowing back through a tube 24 to the inlet of the compressor 4.
  • the cooling system 2 shown at figure 1 it is possible by the cooling system 2 shown at figure 1 to achieve very low temperatures even by a single state cooling system.
  • the different refrigerants will evaporate at different temperatures.
  • By mixing refrigerants with sufficient low boiling points with normal boiling points it is possible to adjust the mixture of refrigerants more or less to a specific temperature. In this way, a highly effective cooling system for low temperature purposes can be achieved. This can lead to a very effective reduction in power consumption by reaching a temperature below -60 °C.
  • FIG. 2 shows a cooling system for an ultra low temperature freezer.
  • the cooling system 102 comprises a compressor 104 which compressor 104 has an outlet tube 106 that is connected through a condenser 108.
  • the condenser is cooled by blowing means 110 and from the condenser 108 a tube 112 lead to a coil 114. From the coil, the refrigerant is further flowing into a receiver 116. From the receiver 116 is a tube 118 leading to a block 125 which comprises a heat exchanger. The gas from the tube 118 is leaving the heat exchanger through a tube 120 which is connected to a capillary tube (not shown). From the capillary tube, a tube 122 leads to the first evaporator 122.
  • a tube 130 leads to the next evaporator 132 from which a tube 134 leads to an evaporator 136. From here a tube 138 lead to a further evaporator 140. From here a tube 142 leads to the final evaporator 144. From this final evaporator 144, a return tube 146 leads to the heat exchanger 125 from which the heat exchanger 125, the return line continues in the tube 124 towards the suction inlet at the compressor 104.
  • FIG 3 shows an enlarged view of the upper part of figure 2.
  • a cooling system 202 comprises a compressor 204 which compressor 204 has an outlet 206 connected through a condenser 208 which is cooled by blowing means 210.
  • a tube 212 lead to a coil 214 for further condensation from where the refrigerant is sent to a re- ceiver 216.
  • a tube 218 leads to a heat exchanger block 225 where the refrigerant leaves the heat exchanger block 225 through a tube 219 that leads to a flow restriction formed as a capillary tube 220 from which capillary tube the refrigerant flows through a tube 222 towards an evaporator 223.
  • the refrigerant leaves the evaporator 223 through a tube 230 to further evaporators (not shown).
  • the refrigerant re- turns from the evaporators through a tube 246 which is sent to the heat exchanger 225.
  • the refrigerant leaves the heat exchanger block 225 through a tube 224 that leads to the inlet of the compressor 204.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

La présente invention porte sur un système de refroidissement et sur un mélange non azéotrope de fluides frigorigènes constitué de fluides frigorigènes respectueux de l'environnement, comprenant un premier groupe principal de fluides frigorigènes, lequel premier groupe principal comprend au moins un mélange des fluides frigorigènes suivants : R600, le butane, R600a, l'isobutane et R1150, l'éthylène. Le mélange non azéotrope de fluides frigorigènes comprend en outre au moins un second groupe mineur de fluides frigorigènes, ledit groupe mineur de fluides frigorigènes appartenant à un groupe de fluides frigorigènes respectueux de l'environnement, auquel groupe mineur appartient au moins un fluide frigorigène d: lequel fluide frigorigène d: a un point d'ébullition naturelle au-dessous de -75°C. De cette manière on peut obtenir un système de refroidissement hautement efficace qui peut être utilisé par exemple dans des systèmes de refroidissement à des températures ultrabasses.
PCT/DK2011/050193 2010-06-03 2011-06-01 Système de refroidissement et mélange non azéotrope de fluides frigorigènes constitué de fluides frigorigènes respectueux de l'environnement WO2011150940A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201070244 2010-06-03
DKPA201070244 2010-06-03

Publications (1)

Publication Number Publication Date
WO2011150940A1 true WO2011150940A1 (fr) 2011-12-08

Family

ID=45066193

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2011/050193 WO2011150940A1 (fr) 2010-06-03 2011-06-01 Système de refroidissement et mélange non azéotrope de fluides frigorigènes constitué de fluides frigorigènes respectueux de l'environnement

Country Status (1)

Country Link
WO (1) WO2011150940A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160178246A1 (en) * 2013-09-27 2016-06-23 Panasonic Healthcare Holdings Co., Ltd. Refrigeration apparatus
CN110925872A (zh) * 2019-11-04 2020-03-27 南京天加环境科技有限公司 一种可超低温制冷运行的直膨空调系统
WO2021069041A1 (fr) 2019-10-07 2021-04-15 Arctiko A/S Fluide réfrigérant comprenant du méthane, et système de réfrigération et armoire dotée d'un tel fluide réfrigérant
WO2023127459A1 (fr) * 2021-12-27 2023-07-06 Ｐｈｃ株式会社 Dispositif de réfrigération
CN116606632A (zh) * 2023-07-19 2023-08-18 中科美菱低温科技股份有限公司 制冷剂

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5337572A (en) * 1993-05-04 1994-08-16 Apd Cryogenics, Inc. Cryogenic refrigerator with single stage compressor
US6631625B1 (en) * 2002-11-27 2003-10-14 Gsle Development Corporation (De Corp) Non-HCFC refrigerant mixture for an ultra-low temperature refrigeration system
WO2007144306A1 (fr) * 2006-06-15 2007-12-21 Elcold Frysere Hobro Aps Réfrigérant et système de réfrigération
US20080053145A1 (en) * 2003-07-15 2008-03-06 Indian Institute Of Technology Refrigerant composition for refrigeration systems
JP2009102567A (ja) * 2007-10-25 2009-05-14 Kanou Reiki:Kk 超低温用非共沸冷媒

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5337572A (en) * 1993-05-04 1994-08-16 Apd Cryogenics, Inc. Cryogenic refrigerator with single stage compressor
US6631625B1 (en) * 2002-11-27 2003-10-14 Gsle Development Corporation (De Corp) Non-HCFC refrigerant mixture for an ultra-low temperature refrigeration system
US20080053145A1 (en) * 2003-07-15 2008-03-06 Indian Institute Of Technology Refrigerant composition for refrigeration systems
WO2007144306A1 (fr) * 2006-06-15 2007-12-21 Elcold Frysere Hobro Aps Réfrigérant et système de réfrigération
JP2009102567A (ja) * 2007-10-25 2009-05-14 Kanou Reiki:Kk 超低温用非共沸冷媒

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160178246A1 (en) * 2013-09-27 2016-06-23 Panasonic Healthcare Holdings Co., Ltd. Refrigeration apparatus
WO2021069041A1 (fr) 2019-10-07 2021-04-15 Arctiko A/S Fluide réfrigérant comprenant du méthane, et système de réfrigération et armoire dotée d'un tel fluide réfrigérant
CN110925872A (zh) * 2019-11-04 2020-03-27 南京天加环境科技有限公司 一种可超低温制冷运行的直膨空调系统
WO2021088355A1 (fr) * 2019-11-04 2021-05-14 南京天加环境科技有限公司 Système de climatisation à détente directe capable de réaliser une opération de refroidissement à très basse température
WO2023127459A1 (fr) * 2021-12-27 2023-07-06 Ｐｈｃ株式会社 Dispositif de réfrigération
CN116606632A (zh) * 2023-07-19 2023-08-18 中科美菱低温科技股份有限公司 制冷剂
CN116606632B (zh) * 2023-07-19 2023-10-20 中科美菱低温科技股份有限公司 制冷剂

Similar Documents

Publication Publication Date Title
Mota-Babiloni et al. Experimental evaluation of R448A as R404A lower-GWP alternative in refrigeration systems
Tashtoush et al. Experimental study of new refrigerant mixtures to replace R12 in domestic refrigerators
EP3255114B2 (fr) Utilisation de compositions pour réfrigération
Lee et al. Performance characteristics of a small-capacity directly cooled refrigerator using R290/R600a (55/45)
JP7476398B2 (ja) 低ｇｗｐカスケード冷却システム
CN115637133A (zh) 热循环系统用组合物以及热循环系统
AU2007338832B2 (en) Fluorinated compositions and systems using such compositions
KR20170003961A (ko) 낮은 gwp 열 전달 조성물
WO2011150940A1 (fr) Système de refroidissement et mélange non azéotrope de fluides frigorigènes constitué de fluides frigorigènes respectueux de l'environnement
WO2017142072A1 (fr) Système à cycle calorifique et procédé à cycle calorifique utilisant ledit système
JP2024020428A (ja) 低ｇｗｐを有する不燃性冷媒、並びに冷蔵を提供するシステム及び方法
JP2023089274A (ja) 冷凍システム及び方法
Borokinni et al. Experimental analysis of the performance of the eco-friendly R510A and R600a refrigerants in a retrofitted vapour compression refrigerating system
JP2023116735A (ja) 冷凍システム及び方法
US20140352336A1 (en) Cascade refrigeration system
US20220363967A1 (en) Refrigerant Comprising Methane, And Refrigeration System And Cabinet With Such Refrigerant
Saibhargav et al. Performance Analysis of Vapour Compression Refrigeration System using HC Refrigerant Mixtures for Water Chiller
EP3821180A1 (fr) Systèmes et procédés de réfrigération
Radha et al. Development of a chest freezer–optimum design of an evaporator coil
Oginni et al. Thermodynamic Performance Analysis of Cascade Vapour Refrigeration System Using Different Refrigerant Pairs: A Review
Raskar et al. A Review of hydroflorocarbons (HFC’S) refrigerants as an alternative to R134a refrigerant
EP4328283A2 (fr) Systèmes et procédés de réfrigération
Rizvi Refrigeration Systems
Al Riyami et al. Performance Analysis of R1234yf and R134a in a Multi-Evaporator with Individual Expansion Valve in a Single Compression System
Saravanan et al. Investigation on Nano Refrigeration

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11789283

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 11789283

Country of ref document: EP

Kind code of ref document: A1