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WO2006079808A1 - Heat exchanging system - Google Patents

Heat exchanging system Download PDF

Info

Publication number
WO2006079808A1
WO2006079808A1 PCT/GB2006/000255 GB2006000255W WO2006079808A1 WO 2006079808 A1 WO2006079808 A1 WO 2006079808A1 GB 2006000255 W GB2006000255 W GB 2006000255W WO 2006079808 A1 WO2006079808 A1 WO 2006079808A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
heat
cooling medium
exchange system
heat exchange
Prior art date
Application number
PCT/GB2006/000255
Other languages
French (fr)
Inventor
Ray Morse
Original Assignee
F-Technologies Limited
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 F-Technologies Limited filed Critical F-Technologies Limited
Publication of WO2006079808A1 publication Critical patent/WO2006079808A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00Compression machines, plants or systems, with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/025Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0253Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
    • F25B2313/02533Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements during heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/025Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0254Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in series arrangements
    • F25B2313/02541Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in series arrangements during cooling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/02Increasing the heating capacity of a reversible cycle during cold outdoor conditions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00Machines, plants or systems, using particular sources of energy
    • F25B27/02Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/006Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine

Definitions

  • the present invention relates to a heat exchanging system.
  • Reverse cycle air conditioning units have been commonly employed for the purpose of regulating the temperature within the retail outlet.
  • refrigeration equipment and air conditioning units are installed as totally separate units for physical and thermodynamic reasons.
  • the heat pump utilises an outdoor heat exchanger as a refrigerant evaporator with the heat source being provided by an ambient medium.
  • Operating temperatures may be such that ice is commonly formed on the external surfaces of the heat exchanger. Such ice inhibits the flow of the ambient medium thereby reducing the heat exchange process and preventing the system from operating correctly. Consequently, periodic defrosting of the heat exchanger is required, at which times, the entire heat supply is suspended.
  • the present invention seeks to alleviate the aforementioned disadvantages of conventional heat pump systems by utilising heat exiting the refrigeration plant to increase the heat pump efficiency in all ambient temperature conditions. As such, periodic defrosting of the heat exchanger may no longer be required.
  • a heat exchange system comprising a first heat exchanger which varies the temperature of a cooling medium drawn therethrough, a second heat exchanger for receiving the cooling medium and a third heat exchanger in communication with the second heat exchanger to allow refrigerant to pass therebetween.
  • first, second and third heat exchangers are combined to form a single heat exchanging unit.
  • a heat exchange system comprising a first heat exchanger which varies the temperature of a cooling medium drawn therethrough, a second heat exchanger for receiving the cooling medium and connecting link between the first and second heat exchangers, the connecting link having a valve to allow or prevent refrigerant to pass between the first and second heat exchangers.
  • Figure 1 is a schematic diagram of a heat exchanger system constructed in accordance with a first embodiment of the present invention showing how the system operates in winter months;
  • Figure 2 is a schematic diagram of a heat exchanger system of Figure 1 showing how the system operates in summer months;
  • Figure 3 is a schematic diagram of a heat exchanger system constructed in accordance with a second embodiment present invention showing how the system operates in winter months;
  • Figure 4 is a schematic diagram of a heat exchanger system of Figure 3 showing how the system operates in summer months.
  • the cooling medium used is air, drawn over the heat exchangers by fans.
  • water or another fluid could equally be used as a cooling medium, drawn over the heat exchangers by appropriate means.
  • FIG. 1 shows the principles of winter operation of a heat exchanger system constructed in accordance with the present invention
  • Air at outside ambient temperature is initially drawn through a first heat exchanger 1 (such as a refrigeration plant condenser) which acts a heat source, by a fan or fans 4 (in the direction of the arrow 2 shown in Figures 1 and 2). As it passes through the heat exchanger 1, the temperature of the cooling medium is raised. The fan or fans 4 draw the cooling medium (now at a raised temperature) through a second heat exchanger 3, which acts as an evaporator, located adjacent the first heat exchanger 1.
  • the elevated temperature of the air being drawn through the second heat exchanger 3 permits a relatively high refrigerant evaporating temperature within the heat exchanger 3 which results in an increase in the efficiency of the heat exchanging system.
  • the elevated evaporating temperature minimises or prevents ice formation on the outer surface of the heat exchanger 3 thus allowing continuous or near continuous operation of the system.
  • Vaporised refrigerant from the second heat exchanger 3 is compressed by at least one compressor 15 and thereby heated.
  • the refrigerant travels to a third heat exchanger 16, which acts as a condenser and which, consequently, provides heat to a building within which the heat exchanger is located.
  • Condensed liquid from the heat exchanger 16 travels to a header 11 on a fourth heat exchanger 10.
  • the unit 10 provides a storage unit for liquid refrigerant. Air, at outside ambient temperature, is drawn through the heat exchanger 10 by the fan or fans 4 to provide sub-cooling to the liquid refrigerant stored therein. Sub-cooled liquid from the heat exchanger 10 is supplied from a header 9 of the heat exchanger 10 to a header 6 of the second heat exchanger 3 through a connecting line 8 via an expansion device 13. A connecting line 7 is closed using a mechanical or similar device 12. The header 6 then distributes the liquid refrigerant through the heat exchanger 3 thereby continuing the system cycle.
  • FIG. 1 shows the principles of summer operation of the illustrated heat exchanger system.
  • Cooling air is drawn through the heat exchanger 3.
  • the refrigerant within the heat exchanger 3, which may now be cooled (de-superheated) vapour or condensed liquid is collected by the header 6 and communicated to the header 9 of the fourth heat exchanger 10 via a connecting line 7.
  • the connecting line 7 is opened using a mechanical or similar device 12.
  • a flow of refrigerant from header 6 of the second heat exchanger 3 to header 9 of the fourth heat exchanger 10 through the connecting line 8 is prevented by a one-way valve or similar device 14.
  • the refrigerant is distributed through the fourth heat exchanger 10 via header 9.
  • a flow of cooling air at ambient outside temperature is drawn through the fourth heat exchanger to cause the refrigerant therein fully to condense into a liquid.
  • the heat exchanger 10 stores the liquid refrigerant.
  • the combined use of heat exchangers 3 and 10 negates any loss in system efficiency caused by the cooling air being drawn through the heat exchanger 3 having been pre-heated by the first heat exchanger 1.
  • the refrigerant travels from the header 11 of the fourth heat exchanger 10 to the third heat exchanger 16, which now acts as an evaporator and which, consequently, provides a cooling effect to a building within which the heat exchanger may be located.
  • the first, second and fourth heat exchangers 1, 3, 10 and the communications therebetween may be all constructed as one unit.
  • the unit may be located within an enclosure.
  • the enclosure unit may take the form of an acoustic absorption unit such as one marketed by the applicant and described in the applicant's previous UK Patent No. 2351795 and International application no. PCT/GB04/002613 both of which are incorporated herein by reference.
  • a further heat exchanger having an adiabatic pad incorporated therein is located adjacent to the first heat exchanger through which the cooling medium travels through prior to the first heat exchanger.
  • FIGS 3 and 4 illustrate a heat exchanging system constructed in accordance with a second embodiment of the invention.
  • This embodiment is a simplified variation of the first embodiment. Winter operation of this embodiment is shown in Figure 3. The operation is much the same as the winter operation of the first embodiment.
  • Air at outside ambient temperature is drawn through a first heat exchanger 20 (such as a refrigeration plant condenser) which acts a heat source, by a fan or fans 21 (in the direction of the arrow shown in Figures 3 and 4). As it passes through the heat exchanger 20, the temperature of the cooling medium is raised. The fan or fans 21 draw the cooling medium (now at a raised temperature) through a second heat exchanger 22, which acts as an evaporator.
  • a first heat exchanger 20 such as a refrigeration plant condenser
  • the fan or fans 21 draw the cooling medium (now at a raised temperature) through a second heat exchanger 22, which acts as an evaporator.
  • Hot gas from a refrigeration compressor 23 is provided through a connecting line 24 to a header 25 of the first heat exchanger 20.
  • a further connecting line 26 extends between the first and second heat exchangers 20, 22.
  • the connecting line 26 includes a one way valve 27.
  • the valve 27 may for example be a solenoid valve. During winter operation the valve 27 is shut so not to allow the flow of hot gas between the heat exchangers 20, 22.
  • a further connecting line 29 includes a one way valve 30. During winter operation the valve 30 is shut so not to allow the flow of hot gas into line 31.
  • FIG. 4 Summer operation of this embodiment is shown in Figure 4.
  • hot gas is received by the second heat exchanger 22 from the discharge of both the refrigeration and air conditioning compressors.
  • Valve 30 in connecting line 29 is open to allow this.
  • Valve 28 is shut so not to allow the flow of hat gas directly into the first heat exchanger 20.
  • the vapour is distributed through the heat exchanger 22 (which now acts as a de- superheater or condenser) by a header 32 and is transmitted to the first exchanger 20 through the connecting line 26, the valve 27 which is now open.
  • the flow of cooling air at ambient outside temperature drawn through the first heat exchanger 20 causes the refrigerant therein fully to condense into a liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

A heat exchange system comprising at least two heat exchangers which are operable to heat a cooling medium during winter months and cool the cooling medium in summer months and transmit the cooling medium to a location requiring air conditioning.

Description

HEAT EXCHANGING SYSTEM
The present invention relates to a heat exchanging system.
Many retail food outlets require refrigeration equipment to serve food display cases, to provide air conditioning in the summer months and to provide heating in the winter.
Reverse cycle air conditioning units (heat pumps) have been commonly employed for the purpose of regulating the temperature within the retail outlet. Conventionally, refrigeration equipment and air conditioning units are installed as totally separate units for physical and thermodynamic reasons.
Conventional heat pump systems have two major disadvantages. Firstly, during winter months when the system works as a heat pump to heat the retail outlet, the efficiency of the air conditioning unit is reduced because the temperature of the heat source is reduced; as a consequence the cost of providing the required heat increases.
Secondly, during the winter months, the heat pump utilises an outdoor heat exchanger as a refrigerant evaporator with the heat source being provided by an ambient medium. Operating temperatures may be such that ice is commonly formed on the external surfaces of the heat exchanger. Such ice inhibits the flow of the ambient medium thereby reducing the heat exchange process and preventing the system from operating correctly. Consequently, periodic defrosting of the heat exchanger is required, at which times, the entire heat supply is suspended. The present invention seeks to alleviate the aforementioned disadvantages of conventional heat pump systems by utilising heat exiting the refrigeration plant to increase the heat pump efficiency in all ambient temperature conditions. As such, periodic defrosting of the heat exchanger may no longer be required.
In one aspect of the present invention, there is provided, a heat exchange system comprising a first heat exchanger which varies the temperature of a cooling medium drawn therethrough, a second heat exchanger for receiving the cooling medium and a third heat exchanger in communication with the second heat exchanger to allow refrigerant to pass therebetween.
Preferably, first, second and third heat exchangers are combined to form a single heat exchanging unit.
In a second aspect of the present invention, there is provided, a heat exchange system comprising a first heat exchanger which varies the temperature of a cooling medium drawn therethrough, a second heat exchanger for receiving the cooling medium and connecting link between the first and second heat exchangers, the connecting link having a valve to allow or prevent refrigerant to pass between the first and second heat exchangers.
Embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings in which :
Figure 1 is a schematic diagram of a heat exchanger system constructed in accordance with a first embodiment of the present invention showing how the system operates in winter months; Figure 2 is a schematic diagram of a heat exchanger system of Figure 1 showing how the system operates in summer months;
Figure 3 is a schematic diagram of a heat exchanger system constructed in accordance with a second embodiment present invention showing how the system operates in winter months; and
Figure 4 is a schematic diagram of a heat exchanger system of Figure 3 showing how the system operates in summer months.
In the embodiments hereinafter described, the cooling medium used is air, drawn over the heat exchangers by fans. However water or another fluid could equally be used as a cooling medium, drawn over the heat exchangers by appropriate means.
Figure 1 shows the principles of winter operation of a heat exchanger system constructed in accordance with the present invention
Air at outside ambient temperature is initially drawn through a first heat exchanger 1 (such as a refrigeration plant condenser) which acts a heat source, by a fan or fans 4 (in the direction of the arrow 2 shown in Figures 1 and 2). As it passes through the heat exchanger 1, the temperature of the cooling medium is raised. The fan or fans 4 draw the cooling medium (now at a raised temperature) through a second heat exchanger 3, which acts as an evaporator, located adjacent the first heat exchanger 1. The elevated temperature of the air being drawn through the second heat exchanger 3 permits a relatively high refrigerant evaporating temperature within the heat exchanger 3 which results in an increase in the efficiency of the heat exchanging system. Moreover, the elevated evaporating temperature minimises or prevents ice formation on the outer surface of the heat exchanger 3 thus allowing continuous or near continuous operation of the system.
Vaporised refrigerant from the second heat exchanger 3 is compressed by at least one compressor 15 and thereby heated. The refrigerant travels to a third heat exchanger 16, which acts as a condenser and which, consequently, provides heat to a building within which the heat exchanger is located.
Condensed liquid from the heat exchanger 16 travels to a header 11 on a fourth heat exchanger 10. As well as being a heat exchanger, the unit 10 provides a storage unit for liquid refrigerant. Air, at outside ambient temperature, is drawn through the heat exchanger 10 by the fan or fans 4 to provide sub-cooling to the liquid refrigerant stored therein. Sub-cooled liquid from the heat exchanger 10 is supplied from a header 9 of the heat exchanger 10 to a header 6 of the second heat exchanger 3 through a connecting line 8 via an expansion device 13. A connecting line 7 is closed using a mechanical or similar device 12. The header 6 then distributes the liquid refrigerant through the heat exchanger 3 thereby continuing the system cycle.
The presence of the fourth heat exchanger 10 providing sub-cooled liquid refrigerant to the heat exchanger 3 greatly increases the efficiency of the system.
Figure 2 shows the principles of summer operation of the illustrated heat exchanger system.
In summer operation, high temperature refrigerant vapour is received by the second heat exchanger 3 from the discharge of the or each compressor 15. The vapour is distributed through the heat exchanger 3 (which now acts as a de-superheater or condenser) by a header 5.
Cooling air is drawn through the heat exchanger 3. The refrigerant within the heat exchanger 3, which may now be cooled (de-superheated) vapour or condensed liquid is collected by the header 6 and communicated to the header 9 of the fourth heat exchanger 10 via a connecting line 7. The connecting line 7 is opened using a mechanical or similar device 12. A flow of refrigerant from header 6 of the second heat exchanger 3 to header 9 of the fourth heat exchanger 10 through the connecting line 8 is prevented by a one-way valve or similar device 14.
The refrigerant is distributed through the fourth heat exchanger 10 via header 9. A flow of cooling air at ambient outside temperature is drawn through the fourth heat exchanger to cause the refrigerant therein fully to condense into a liquid. The heat exchanger 10 stores the liquid refrigerant. The combined use of heat exchangers 3 and 10 negates any loss in system efficiency caused by the cooling air being drawn through the heat exchanger 3 having been pre-heated by the first heat exchanger 1.
The refrigerant travels from the header 11 of the fourth heat exchanger 10 to the third heat exchanger 16, which now acts as an evaporator and which, consequently, provides a cooling effect to a building within which the heat exchanger may be located.
The first, second and fourth heat exchangers 1, 3, 10 and the communications therebetween may be all constructed as one unit. The unit may be located within an enclosure. The enclosure unit may take the form of an acoustic absorption unit such as one marketed by the applicant and described in the applicant's previous UK Patent No. 2351795 and International application no. PCT/GB04/002613 both of which are incorporated herein by reference.
In a further alternative embodiment (not shown), a further heat exchanger having an adiabatic pad incorporated therein is located adjacent to the first heat exchanger through which the cooling medium travels through prior to the first heat exchanger.
Figures 3 and 4 illustrate a heat exchanging system constructed in accordance with a second embodiment of the invention.
This embodiment is a simplified variation of the first embodiment. Winter operation of this embodiment is shown in Figure 3. The operation is much the same as the winter operation of the first embodiment.
Air at outside ambient temperature is drawn through a first heat exchanger 20 (such as a refrigeration plant condenser) which acts a heat source, by a fan or fans 21 (in the direction of the arrow shown in Figures 3 and 4). As it passes through the heat exchanger 20, the temperature of the cooling medium is raised. The fan or fans 21 draw the cooling medium (now at a raised temperature) through a second heat exchanger 22, which acts as an evaporator.
Hot gas from a refrigeration compressor 23 is provided through a connecting line 24 to a header 25 of the first heat exchanger 20.
A further connecting line 26 extends between the first and second heat exchangers 20, 22. The connecting line 26 includes a one way valve 27. The valve 27 may for example be a solenoid valve. During winter operation the valve 27 is shut so not to allow the flow of hot gas between the heat exchangers 20, 22.
A further connecting line 29 includes a one way valve 30. During winter operation the valve 30 is shut so not to allow the flow of hot gas into line 31.
Summer operation of this embodiment is shown in Figure 4. In this operation, hot gas is received by the second heat exchanger 22 from the discharge of both the refrigeration and air conditioning compressors. Valve 30 in connecting line 29 is open to allow this. Valve 28 is shut so not to allow the flow of hat gas directly into the first heat exchanger 20. The vapour is distributed through the heat exchanger 22 (which now acts as a de- superheater or condenser) by a header 32 and is transmitted to the first exchanger 20 through the connecting line 26, the valve 27 which is now open. The flow of cooling air at ambient outside temperature drawn through the first heat exchanger 20 causes the refrigerant therein fully to condense into a liquid.
Unlike the first embodiment, the embodiment of Figures 3 and 4 requires only a single refrigerant which has a number of practical advantages.
The above described embodiments has been given by way of example only, and the skilled reader will naturally appreciate that many variations could be made thereto without departing from the scope of the present invention.

Claims

1. A heat exchange system comprising a first heat exchanger for which varies the temperature of a cooling medium drawn therethrough, a second heat exchanger for receiving the cooling medium and a third heat exchanger in communication with the second heat exchanger to allow refrigerant to pass therebetween.
2. A heat exchange system according to claim 1, wherein the first and second heat exchangers are positioned adjacent one another.
3. A heat exchange system according to claim 1 or claim 2, wherein the first, second and third heat exchangers are combined to form a single heat exchanging unit.
4. A heat exchange system according to any one of claims 1 to 3, wherein the cooling medium is drawn through the first heat exchanger by one or more fans.
5. A heat exchange system comprising a first heat exchanger which varies the temperature of a cooling medium drawn therethrough, a second heat exchanger for receiving the cooling medium and connecting link between the first and second heat exchangers, the connecting link having a valve to allow or prevent refrigerant to pass between the first and second heat exchangers.
6. A heat exchange according to claim 5, wherein the valve is a one way valve which is operable between an open state to allow refrigerant to pass between first and second heat exchangers during summer months when the cooling medium requires cooling, and a closed state to prevent refigerant from passing between first and second heat exchangers during winter months when the cooling medium requires heating.
7. A heat exchange system as substantially hereinbefore described and referred to in the Figures
PCT/GB2006/000255 2005-01-25 2006-01-25 Heat exchanging system WO2006079808A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0501462.6A GB0501462D0 (en) 2005-01-25 2005-01-25 Heat exchanging system
GB05011462.6 2005-01-25

Publications (1)

Publication Number Publication Date
WO2006079808A1 true WO2006079808A1 (en) 2006-08-03

Family

ID=34259600

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/000255 WO2006079808A1 (en) 2005-01-25 2006-01-25 Heat exchanging system

Country Status (2)

Country Link
GB (1) GB0501462D0 (en)
WO (1) WO2006079808A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139924A (en) * 1960-12-08 1964-07-07 I C E D Inc Internal combustion engine driven heat pump
EP1108575A1 (en) * 1998-08-20 2001-06-20 Zexel Valeo Climate Control Corporation Air conditioner for vehicle
JP2001289532A (en) * 2000-02-02 2001-10-19 Mitsubishi Electric Corp Chiller/air-conditioner and its operation method
US6826921B1 (en) * 2003-07-03 2004-12-07 Lennox Industries, Inc. Air conditioning system with variable condenser reheat for enhanced dehumidification

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139924A (en) * 1960-12-08 1964-07-07 I C E D Inc Internal combustion engine driven heat pump
EP1108575A1 (en) * 1998-08-20 2001-06-20 Zexel Valeo Climate Control Corporation Air conditioner for vehicle
JP2001289532A (en) * 2000-02-02 2001-10-19 Mitsubishi Electric Corp Chiller/air-conditioner and its operation method
US6826921B1 (en) * 2003-07-03 2004-12-07 Lennox Industries, Inc. Air conditioning system with variable condenser reheat for enhanced dehumidification

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 02 2 April 2002 (2002-04-02) *

Also Published As

Publication number Publication date
GB0501462D0 (en) 2005-03-02

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