EP2179231A1 - Compression refrigerating machine - Google Patents

Compression refrigerating machine

Info

Publication number
EP2179231A1
EP2179231A1 EP07765140A EP07765140A EP2179231A1 EP 2179231 A1 EP2179231 A1 EP 2179231A1 EP 07765140 A EP07765140 A EP 07765140A EP 07765140 A EP07765140 A EP 07765140A EP 2179231 A1 EP2179231 A1 EP 2179231A1
Authority
EP
European Patent Office
Prior art keywords
condenser
thermoelectrical
refrigerant
refrigerating machine
compressor
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.)
Withdrawn
Application number
EP07765140A
Other languages
German (de)
French (fr)
Inventor
Hans Joachim Huff
Rainer Schrey
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.)
Carrier Corp
Original Assignee
Carrier Corp
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 Carrier Corp filed Critical Carrier Corp
Publication of EP2179231A1 publication Critical patent/EP2179231A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/02—Subcoolers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00478—Air-conditioning devices using the Peltier effect
    • 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
    • F25B21/00—Machines, plants or systems, using electric or magnetic effects
    • F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/04—Desuperheaters

Definitions

  • Compression refrigerating machines are known and widely used.
  • Common compression refrigerating machines include a vapor compression cycle comprising a compressor, a condenser, an expansion device, an evaporator, and refrigerant conduits circulating a refrigerant through the compressor, the condenser, the expansion device, and the evaporator in order to cool a cold consumer coupled to the evaporator to a desired temperature.
  • Exemplary embodiments of the invention include a compression refrigerating machine comprising a compressor, a condenser, an expansion device, an evaporator and refrigerant conduits circulating a refrigerant through the compressor, the condenser, the expansion device and the evaporator; wherein at least one thermo- electrical device is arranged before the condenser, especially between the compressor and the condenser, or after the condenser, especially between the condenser and the evaporator, in particular between the condenser and the expansion valve, and wherein said thermoelectrical device in operation reduces the temperature of the refrigerant.
  • Exemplary embodiments of the invention further include a method for refrigerating a compression refrigerating machine, said compression refrigerating machine comprising a compressor, a condenser, an expansion device, an evaporator and refrigerant conduits circulating a refrigerant through the compressor, the con- denser, the expansion device and the evaporator, and at least one thermoelectrical device arranged in the vapor compression cycle before the condenser or after the condenser, said method comprising the steps of operating the compressor and operating the at least one thermoelectrical device in order to reduce the temperature of the refrigerant before or after the condenser.
  • Figure 1 shows a schematic view of a vapor compression cycle according to a first embodiment of the invention
  • Figure 2 shows a schematic view of a second embodiment of a vapor compression cycle according to a second embodiment of the present invention
  • Figure 3 shows a schematic view of a vapor compression cycle according to a third embodiment of the invention.
  • Figure 1 shows a vapor compression cycle 2 according to a first embodiment of the invention.
  • the vapor compression cycle 2 comprises a compressor 8, a condenser 10, an expansion device 12, and an evaporator 6, which are circularly interconnected by refrigerant conduits 4.
  • a refrigerant is circulating in an anti-clockwise direction A from the compressor 8 through the condenser 10, through the expansion device 12 and through the expansion device 12 back to the compressor 8.
  • the refrigerant is cooled and condensed within the condenser 10 against a secondary cooling medium, e.g. air, and evaporated within the evaporator 6 cooling at least one cold consumer coupled to the evaporator 6.
  • a secondary cooling medium e.g. air
  • thermoelectrical device 14 is arranged in the vapor compression cycle 2 before, i.e. upstream of the condenser 10, between the compressor 8 and the condenser 10.
  • the thermoelectrical device also may also be arranged downstream of the condenser 10.
  • the condenser 10 is a heat rejection exchanger cooling the refrigerant by means of a cooling medium, which could either be an appropriate gas like air or a liquid like water.
  • the first thermoelectrical device 14 acts as a heat sink and converts a portion of the high temperature heat comprised in the refrigerant at this point of the vapor compression cycle 2 into useful electrical energy E 1 .
  • the refrigerant entering the condenser 10 has a lower temperature which increases the cool- ing capacity and increases the efficiency of the vapor compression cycle 1.
  • thermoelectrical device 14 can be consumed, e.g. by the compressor 8, thereby reducing the net input to the vapor compression cycle 2 and additionally increasing its efficiency.
  • Figure 2 shows a vapor compression cycle 16 according to a second embodiment of the invention.
  • thermoelectrical device 18 is arranged in the vapor compression cycle 16 after, i.e. downstream of the condenser 10, between the condenser 10 and the expansion device 12.
  • thermoelectrical device 18 which is used to cool the refrigerant leaving the condenser 10. Reducing the temperature of the liquid refrigerant increases the cooling capacity and enhances the efficiency of the vapor compression cycle 16.
  • FIG. 3 shows a vapor compression cycle 20 according to a third embodiment of the invention.
  • the vapor compression cycle 20 according to said third embodiment comprises two thermoelectrical devices 14, 18 which are arranged in the vapor compression cycle 20.
  • the first thermoelectrical device 14 is arranged upstream of the condenser 10, between the compressor 8 and the condenser 10, while the second thermoelectrical device 18 is arranged downstream of the condenser 10, between the condenser 10 and the expansion device 12.
  • thermoelectrical device 18 is supplied with electrical energy E generated by the first thermoelectrical device 14.
  • the third embodiment of the invention shown in Figure 3 combines the advantages of the first and the second embodiments by cooling the refrigerant both before entering and after leaving the condenser 10. Furthermore, the energy E1 generated by the first thermoelectrical device 14 can be consumed by the second thermoelectrical device 18 so that no or only little external energy has to be supplied to the second thermoelectrical device 18.
  • thermoelectrical devices 14 and 18 of the present invention can be appropriate thermoelectrical elements and Peltier-elements.
  • the energy-generating ther- moelectrical device 14 can be a thermoelectrical generator.
  • Exemplary embodiments as described above, allow for an increased cooling capacity and energy efficiency of the compression refrigerating machine, and thus the operating costs can be significantly reduced.
  • thermoelectrical device can be realized as a set of thermoelectrical device connected serially or in parallel.
  • the at least one thermoelectrical device con- verts thermal energy of the refrigerant into electrical energy, therefor making use of a formerly unexploited energy ressource.
  • This generated electrical energy can be consumed, transported and stored easily by means well known to the the person skilled in the art of electrical engineering.
  • the vapor compression cycle comprises a first thermoelectrical device, which is arranged before, i.e. upstream of the condenser and a second thermoelectrical device, which is arranged after, i.e. downstream of the condenser, respectively.
  • the second thermoelectrical device arranged after the condenser is supplied with electrical energy generated by the first thermoelectrical device, arranged before the condenser.
  • the energy supply for such additional cooling can be kept low or can even be reduced to zero, since the second thermoelectrical device can be supplied with energy generated by the first thermoelectrical device.
  • thermoelectrical device is made up in a modular assembly. This facilitates the exchange and maintenance of said thermoelectrical device.
  • thermoelectrical devices in another embodiment of the invention, at least one of the thermoelectrical devices is a thermoelectric element.
  • Thermoelectric elements e.g. Peltier elements, provide efficient thermoelectrical devices at low cost and do not need a lot of maintenance, as they to not comprise any moving mechanical components.
  • the condenser is a heat rejection heat exchanger which cools the refrigerant by means of a secondary cooling medium.
  • Said secondary cooling medium may be ambient air.
  • a secondary compression cycle can be provided.
  • at least one thermoelectrical device uses the secondary cooling medium as a heat sink in order to improve the efficiency of said thermoelectrical device.
  • Said secondary cooling medium may be ambient air.
  • thermoelectrical device 16 vapor compression cycle

Abstract

A compression refrigerating machine according to the invention includes a vapor compression cycle (20) comprising a compressor (8), a condenser (10), an expansion device (12), an evaporator (6) and refrigerant conduits (4) circulating a refrigerant through the compressor (8), the condenser (10), the expansion valve (12) and the evaporator (6); wherein at least one thermoelectrical device (14, 18) is arranged in the vapor compression cycle (20) before the condenser (10) or after the condenser (10), said thermoelectrical device (14, 18) in operation reducing the temperature of the refrigerant.

Description

Compression refrigerating machine
Compression refrigerating machines are known and widely used. Common compression refrigerating machines include a vapor compression cycle comprising a compressor, a condenser, an expansion device, an evaporator, and refrigerant conduits circulating a refrigerant through the compressor, the condenser, the expansion device, and the evaporator in order to cool a cold consumer coupled to the evaporator to a desired temperature.
Accordingly, it would be beneficial to increase the cooling capacity and the energy efficiency of a compression refrigerating machine, thereby reducing its operating costs.
Exemplary embodiments of the invention include a compression refrigerating machine comprising a compressor, a condenser, an expansion device, an evaporator and refrigerant conduits circulating a refrigerant through the compressor, the condenser, the expansion device and the evaporator; wherein at least one thermo- electrical device is arranged before the condenser, especially between the compressor and the condenser, or after the condenser, especially between the condenser and the evaporator, in particular between the condenser and the expansion valve, and wherein said thermoelectrical device in operation reduces the temperature of the refrigerant.
Exemplary embodiments of the invention further include a method for refrigerating a compression refrigerating machine, said compression refrigerating machine comprising a compressor, a condenser, an expansion device, an evaporator and refrigerant conduits circulating a refrigerant through the compressor, the con- denser, the expansion device and the evaporator, and at least one thermoelectrical device arranged in the vapor compression cycle before the condenser or after the condenser, said method comprising the steps of operating the compressor and operating the at least one thermoelectrical device in order to reduce the temperature of the refrigerant before or after the condenser.
Embodiments of the invention are described in greater detail below with reference to the Figures, wherein:
Figure 1 shows a schematic view of a vapor compression cycle according to a first embodiment of the invention;
Figure 2 shows a schematic view of a second embodiment of a vapor compression cycle according to a second embodiment of the present invention;
Figure 3 shows a schematic view of a vapor compression cycle according to a third embodiment of the invention.
Figure 1 shows a vapor compression cycle 2 according to a first embodiment of the invention.
The vapor compression cycle 2 comprises a compressor 8, a condenser 10, an expansion device 12, and an evaporator 6, which are circularly interconnected by refrigerant conduits 4. A refrigerant is circulating in an anti-clockwise direction A from the compressor 8 through the condenser 10, through the expansion device 12 and through the expansion device 12 back to the compressor 8. In doing so, the refrigerant is cooled and condensed within the condenser 10 against a secondary cooling medium, e.g. air, and evaporated within the evaporator 6 cooling at least one cold consumer coupled to the evaporator 6. As a result there is a tem- perature drop between the gaseous refrigerant entering the condenser 10 and the liquid refrigerant entering the expansion device 12 and the evaporator 6.
In the exemplary embodiment of the invention, a first thermoelectrical device 14 is arranged in the vapor compression cycle 2 before, i.e. upstream of the condenser 10, between the compressor 8 and the condenser 10. However, the thermoelectrical device also may also be arranged downstream of the condenser 10. The condenser 10 is a heat rejection exchanger cooling the refrigerant by means of a cooling medium, which could either be an appropriate gas like air or a liquid like water.
The first thermoelectrical device 14 acts as a heat sink and converts a portion of the high temperature heat comprised in the refrigerant at this point of the vapor compression cycle 2 into useful electrical energy E1. In consequence the refrigerant entering the condenser 10 has a lower temperature which increases the cool- ing capacity and increases the efficiency of the vapor compression cycle 1.
Furthermore, the energy Ei generated by the thermoelectrical device 14 can be consumed, e.g. by the compressor 8, thereby reducing the net input to the vapor compression cycle 2 and additionally increasing its efficiency.
Figure 2 shows a vapor compression cycle 16 according to a second embodiment of the invention.
A second thermoelectrical device 18 is arranged in the vapor compression cycle 16 after, i.e. downstream of the condenser 10, between the condenser 10 and the expansion device 12.
Electrical energy E2 is supplied to the second thermoelectrical device 18, which is used to cool the refrigerant leaving the condenser 10. Reducing the temperature of the liquid refrigerant increases the cooling capacity and enhances the efficiency of the vapor compression cycle 16.
Figure 3 shows a vapor compression cycle 20 according to a third embodiment of the invention. The vapor compression cycle 20 according to said third embodiment comprises two thermoelectrical devices 14, 18 which are arranged in the vapor compression cycle 20. The first thermoelectrical device 14 is arranged upstream of the condenser 10, between the compressor 8 and the condenser 10, while the second thermoelectrical device 18 is arranged downstream of the condenser 10, between the condenser 10 and the expansion device 12.
In this embodiment, the second thermoelectrical device 18 is supplied with electrical energy E generated by the first thermoelectrical device 14.
The third embodiment of the invention shown in Figure 3 combines the advantages of the first and the second embodiments by cooling the refrigerant both before entering and after leaving the condenser 10. Furthermore, the energy E1 generated by the first thermoelectrical device 14 can be consumed by the second thermoelectrical device 18 so that no or only little external energy has to be supplied to the second thermoelectrical device 18.
The thermoelectrical devices 14 and 18 of the present invention can be appropriate thermoelectrical elements and Peltier-elements. The energy-generating ther- moelectrical device 14 can be a thermoelectrical generator.
Exemplary embodiments, as described above, allow for an increased cooling capacity and energy efficiency of the compression refrigerating machine, and thus the operating costs can be significantly reduced.
The respective at least one thermoelectrical device can be realized as a set of thermoelectrical device connected serially or in parallel.
In an embodiment of the invention, the at least one thermoelectrical device con- verts thermal energy of the refrigerant into electrical energy, therefor making use of a formerly unexploited energy ressource. This generated electrical energy can be consumed, transported and stored easily by means well known to the the person skilled in the art of electrical engineering.
In an embodiment of the invention, the vapor compression cycle comprises a first thermoelectrical device, which is arranged before, i.e. upstream of the condenser and a second thermoelectrical device, which is arranged after, i.e. downstream of the condenser, respectively. By such a vapor compression cycle, a double cooling of the refrigerant by the first and the second thermoelectrical devices can be effected, thus increasing the efficiency of the vapor compression cycle even further.
In a further embodiment of the invention, the second thermoelectrical device arranged after the condenser is supplied with electrical energy generated by the first thermoelectrical device, arranged before the condenser. In this embodiment, the energy supply for such additional cooling can be kept low or can even be reduced to zero, since the second thermoelectrical device can be supplied with energy generated by the first thermoelectrical device.
In another embodiment of the invention, the at least one thermoelectrical device is made up in a modular assembly. This facilitates the exchange and maintenance of said thermoelectrical device.
In another embodiment of the invention, at least one of the thermoelectrical devices is a thermoelectric element. Thermoelectric elements, e.g. Peltier elements, provide efficient thermoelectrical devices at low cost and do not need a lot of maintenance, as they to not comprise any moving mechanical components.
In another embodiment of the invention, the condenser is a heat rejection heat exchanger which cools the refrigerant by means of a secondary cooling medium. Said secondary cooling medium may be ambient air. Alternatively, a secondary compression cycle can be provided. In another embodiment of the invention, at least one thermoelectrical device uses the secondary cooling medium as a heat sink in order to improve the efficiency of said thermoelectrical device. Said secondary cooling medium may be ambient air.
The features, embodiments and advantages as described with respect to the compression refrigerating machine can also be realized, in terms of method steps, with the method for refrigerating the compression refrigerating machine according to the invention.
While the invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
List of Reference Numerals
2 vapor compression cycle
4 refrigerant conduits 6 evaporator
8 compressor
10 condenser
12 expansion device
14 first thermoelectrical device 16 vapor compression cycle
18 second thermoelectrical device
20 vapor compression cycle

Claims

Claims
1. Compression refrigerating machine (2; 16; 20) comprising a compressor (8), a condenser (10), an expansion device (12), an evaporator (6) and refrigerant conduits (4) circulating a refrigerant through the compressor (8), the condenser (10), the expansion device (12) and the evaporator (6); wherein at least one thermoelectrical device (14, 18) is arranged before or after the condenser (10), said thermoelectrical device (14, 18) in operation reducing the temperature of the refrigerant.
2. Compression refrigerating machine of claim 1 , wherein at least one thermoelectrical device (14) is arranged before the condenser (10) and in operation converts thermal energy of the refrigerant into electrical energy (Ei).
3. Compression refrigerating machine of claim 1 or 2, wherein at least one thermoelectrical device (18) is arranged after the condenser (10) and in operation is supplied with electrical energy (E1) in order to reduce the temperature of the refrigerant.
4. Compression refrigerating machine of claim 1 , wherein at least one thermoelectrical device (14) is arranged before the condenser (10) and at least one thermoelectrical device (18) is arranged after the condenser (10).
5. Compression refrigerating machine of claim 4, wherein the second thermoelectrical device (18) is supplied with electrical energy (E) generated by the first thermoelectrical device (14).
6. Compression refrigerating machine of claim 1 - 5, wherein the at least one thermoelectrical device (14, 18) is made up in a modular assembly.
7. Compression refrigerating machine of claim 1 - 6, wherein the at least one thermoelectrical device (14, 18) comprises a Peltier element.
8. Compression refrigerating machine of claim 3 - 7, wherein the at least one thermoelectrical device (18) is a thermoelectrical gen- erator.
9. Method for refrigerating a compression refrigerating machine, said compression refrigerating machine having a vapor compression cycle (2; 16; 20) comprising a compressor (8), a condenser (10), an expansion device (12), an evaporator (6) and refrigerant conduits (4) circulating a refrigerant through the compressor (8), the condenser (10), the expansion device (12) and the evaporator (6), and at least one thermoelectrical device (14, 18) arranged in the vapor compression cycle (2; 16; 20) before the condenser (10) or after the condenser (10), said method comprising the steps of operating the compressor (8); and operating the at least one thermoelectrical device (14, 18) in order to reduce the temperature of the refrigerant before or after the condenser (10).
EP07765140A 2007-07-09 2007-07-09 Compression refrigerating machine Withdrawn EP2179231A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/006062 WO2009006918A1 (en) 2007-07-09 2007-07-09 Compression refrigerating machine

Publications (1)

Publication Number Publication Date
EP2179231A1 true EP2179231A1 (en) 2010-04-28

Family

ID=39186789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07765140A Withdrawn EP2179231A1 (en) 2007-07-09 2007-07-09 Compression refrigerating machine

Country Status (2)

Country Link
EP (1) EP2179231A1 (en)
WO (1) WO2009006918A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9134053B2 (en) 2011-08-23 2015-09-15 B/E Aerospace, Inc. Vehicle refrigerator having a liquid line subcooled vapor cycle system
ITRM20120228A1 (en) * 2012-05-21 2013-11-22 Celli Spa REINFORCED REFRIGERATOR SYSTEM.
DE102013005304A1 (en) 2013-03-22 2014-09-25 Technische Universität Ilmenau Device and method for generating a cooling capacity
EP2799343B1 (en) 2013-04-03 2017-02-15 Airbus Operations GmbH Aircraft air-conditioining system
DE102013211177A1 (en) * 2013-06-14 2014-12-18 Airbus Operations Gmbh An aircraft cooling system and method for operating an aircraft cooling system
US10259288B2 (en) 2014-10-01 2019-04-16 Nissan North America, Inc. Power recovery system for a vehicle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070101737A1 (en) * 2005-11-09 2007-05-10 Masao Akei Refrigeration system including thermoelectric heat recovery and actuation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999013277A1 (en) * 1997-09-05 1999-03-18 Fisher & Paykel Limited Refrigeration system with variable sub-cooling
US6237359B1 (en) * 1998-10-08 2001-05-29 Thomas H. Hebert Utilization of harvest and/or melt water from an ice machine for a refrigerant subcool/precool system and method therefor
DE29908469U1 (en) * 1999-05-12 1999-08-12 Chen Sih Li Thermal battery
WO2002004788A1 (en) * 2000-07-06 2002-01-17 Drysdale Kenneth William Patte Turbine, power generation system therefor and method of power generation
US7131294B2 (en) * 2004-01-13 2006-11-07 Tecumseh Products Company Method and apparatus for control of carbon dioxide gas cooler pressure by use of a capillary tube
WO2007000042A1 (en) * 2005-06-27 2007-01-04 Fleming Mark A Refrigerator or freezer with enhanced efficiency
CA2620391A1 (en) * 2005-08-29 2007-03-08 Carrier Corporation Thermoelectric device based refrigerant subcooling
US7363766B2 (en) * 2005-11-08 2008-04-29 Nissan Technical Center North America, Inc. Vehicle air conditioning system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070101737A1 (en) * 2005-11-09 2007-05-10 Masao Akei Refrigeration system including thermoelectric heat recovery and actuation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2009006918A1 *

Also Published As

Publication number Publication date
WO2009006918A1 (en) 2009-01-15

Similar Documents

Publication Publication Date Title
US20090266084A1 (en) Thermoelectric device based refrigerant subcooling
EP2223021B1 (en) Refrigerating system and method for refrigerating
JP4989905B2 (en) Waste heat utilization system
US20090120618A1 (en) Cooling apparatus for a computer system
EP2709864B1 (en) Cooling system
WO2009006918A1 (en) Compression refrigerating machine
CN108332455B (en) Refrigerant circuit and method for operating a refrigerant circuit
JP2006162246A (en) Refrigeration system and an improved transcritical vapour compression cycle
JP5530904B2 (en) Heat pump type hot water generator
JP2005077088A (en) Condensation machine
US20120186290A1 (en) Pumped loop driven vapor compression cooling system
Mohammadi et al. Energy and exergy performance comparison of different configurations of an absorption-two-stage compression cascade refrigeration system with carbon dioxide refrigerant
US10578344B2 (en) Reversible liquid suction gas heat exchanger
KR20090124765A (en) Hot water production system using 2-steps heat pump cycles
EP2165135B1 (en) Refrigerating system
JP5350447B2 (en) Waste heat utilization system
KR101325887B1 (en) warm water system of cascade cycle heat pump
US20100122540A1 (en) Thermoelectric cooler for economized refrigerant cycle performance boost
JP2013250030A (en) Refrigerating apparatus
US20220113067A1 (en) Refrigeration unit
JP2008267731A (en) Air-conditioning device
KR20090095744A (en) Cooling cycle device
Sayyad et al. Experimental Analysis on Vapour Compression-Thermoelectric Hybrid Refrigeration System
EP2856042B1 (en) Energy recovery apparatus
KR101660123B1 (en) A refrigeration-freeze system with dual series evaporator and vapor-liquid separator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100203

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HUFF, HANS JOACHIM

Inventor name: SCHREY, RAINER

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20170216

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170627