WO1994020806A1 - A heat exchanger - Google Patents

A heat exchanger Download PDF

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Publication number
WO1994020806A1
WO1994020806A1 PCT/AU1994/000054 AU9400054W WO9420806A1 WO 1994020806 A1 WO1994020806 A1 WO 1994020806A1 AU 9400054 W AU9400054 W AU 9400054W WO 9420806 A1 WO9420806 A1 WO 9420806A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
water
heat exchanger
inlet
conduit
Prior art date
Application number
PCT/AU1994/000054
Other languages
French (fr)
Inventor
Robert Ellis Lees
Paul Anthony Venardos
Original Assignee
Robert Ellis Lees
Paul Anthony Venardos
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 Robert Ellis Lees, Paul Anthony Venardos filed Critical Robert Ellis Lees
Priority to AU60335/94A priority Critical patent/AU6033594A/en
Publication of WO1994020806A1 publication Critical patent/WO1994020806A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/208—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with tubes filled with heat transfer fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0472—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being helically or spirally coiled
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/046—Condensers with refrigerant heat exchange tubes positioned inside or around a vessel containing water or pcm to cool the refrigerant gas
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the present invention relates to heat exchangers and more particularly, to heat exchangers for refrigeration and air conditioning condensors.
  • the present invention relates to condensors for refrigeration units employed in business establishments such as hotels that have a considerable demand in respect of water.
  • the refrigeration unit being used in the air conditioning system.
  • Cooling towers have two major disadvantages. Firstly, there is the health problems which can arise if the tower is not correctly maintained. Secondly, a considerable amount of water is required to replace the water which evaporates. Still further, the towers are generally large structures and are unsightly.
  • Another type of device includes a water jacket around the condensor coil, and through which water passes to cool the coil. The water is then ducted to a drain.
  • the water jacket is relatively small and approximates relatively closely the volume encompassed by the coil. This known device suffers from the disadvantage that it too also requires large quantities of water.
  • a heat exchanger comprising: a tank to receive water under pressure, the tank having an outlet and an inlet between which water passes; a conduit located within the tank and having an inlet and an outlet extending to the exterior of the tank and through which a fluid will pass to be cooled by water removing heat from the conduit; and wherein said tank has a volume which is large relative to the volume of conduit in the tank so that water in the tank will continue to remove heat from the conduit during periods of little or no water flow through the tank.
  • the conduit is a refrigeration system condensor, and the water cools the condensor to cause refrigerant that passes therethrough to condense.
  • a pressure release valve will limit pressure within the tank.
  • the above described heat exchanger is intended for installation in a building.
  • the mains water supply would be connected to the inlet of the heat exchanger, and the outlet would be connected to the water distribution network of the building. 5
  • the tank would have a volume so that during a period of at least two hours when there is very little or no water flow through the tank, the water temperature in the tank would not rise by more than 10 degrees.
  • the heat exchanger 10 has an inlet 11 to be connected to the mains pressure water supply system.
  • the inlet 11 is also provided with a non-return valve 12 restricting water to flow
  • a pressure limiting valve 14 is also provided to limit the pressure of water delivered to the tank 15.
  • the tank 15 is also provided with an outlet 16 connected to the normal water distribution network of a hotel. Water passes from the inlet 11 to the outlet 16.
  • the tank 15 has a side wall 17 through which there passes conduits 18 connected to
  • the refrigeration system would be part of the air conditioning system of the hotel.
  • Refrigerant is delivered to the coil 19 and passes in the direction of the arrow 20.
  • a safety head pressure control 21 is also provided.
  • a safety pressure release valve 22 is provided.
  • the valve 22 will vent water from the tank 15 should the pressure therein exceed a predetermined pressure.
  • the tank has an internal volume of approximately 730 litres. This is large relative to the volume of the coil 19.
  • the tank 15 has a volume which is large relative to the volume of the coil 19, so that during periods of little water use (that is when there is no or very little water flow through the tank 15) water within the tank 15 will continue to cool the coil 19 for at least two to three hours with the water within the tank 15 not increasing in temperature more than
  • the temperature rise in the water in the tank 15 should only be 2°C to 5 °C.
  • the tank 15 would have a volume of 750 litres and the coil 19 would have a length of about 30 to 40m.
  • the coil 19 would consist of two coils each of 18m in length.
  • the tank 15 would have a volume of 1500 litres anu uie ⁇ n iv a length of about 60m.
  • the coil 19 may merely receive a liquid (such as water) to be cooled by the water passing through the tank 17.
  • a liquid such as water
  • the coil 19 may receive the water that would normally circulate in a cooling tower.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A heat exchanger (10) having an inlet (11) to be connected to the mains pressure water system. The heat exchanger (10) includes a tank (15) also provided with an outlet (16). Accordingly water passes through the tank (15) from the inlet (11) to the outlet (16). Located within the tanks (15) is a coil (19) of a refrigeration system. Refrigerant passing through the coil (19) is condensed by heat being removed from the coil (19) by the water in the tank (15).

Description

A Heat Exchanger
Technical Field
The present invention relates to heat exchangers and more particularly, to heat exchangers for refrigeration and air conditioning condensors. Background of the Invention
The present invention relates to condensors for refrigeration units employed in business establishments such as hotels that have a considerable demand in respect of water. The refrigeration unit being used in the air conditioning system.
The most common means of cooling the condensor coil of a refrigeration unit of an air conditioning system, is a cooling tower. Cool water and/or cool air is passed over the coil to condense the refrigerant. Water within the cooling tower is circulated and evaporation reduces the temperature of the water to remove heat delivered thereto by the condensor coil. Cooling towers have two major disadvantages. Firstly, there is the health problems which can arise if the tower is not correctly maintained. Secondly, a considerable amount of water is required to replace the water which evaporates. Still further, the towers are generally large structures and are unsightly.
In hotels, refrigeration systems are used to cool beverages. Such systems also employ cooling towers.
Another type of device includes a water jacket around the condensor coil, and through which water passes to cool the coil. The water is then ducted to a drain. The water jacket is relatively small and approximates relatively closely the volume encompassed by the coil. This known device suffers from the disadvantage that it too also requires large quantities of water.
Object of the Invention It is the object of the present invention to overcome or substantially ameliorate the above disadvantages.
Summary of the Invention
There is disclosed herein a heat exchanger comprising: a tank to receive water under pressure, the tank having an outlet and an inlet between which water passes; a conduit located within the tank and having an inlet and an outlet extending to the exterior of the tank and through which a fluid will pass to be cooled by water removing heat from the conduit; and wherein said tank has a volume which is large relative to the volume of conduit in the tank so that water in the tank will continue to remove heat from the conduit during periods of little or no water flow through the tank.
Preferably the conduit is a refrigeration system condensor, and the water cools the condensor to cause refrigerant that passes therethrough to condense. Preferably a pressure release valve will limit pressure within the tank. The above described heat exchanger is intended for installation in a building. The mains water supply would be connected to the inlet of the heat exchanger, and the outlet would be connected to the water distribution network of the building. 5 Preferably the tank would have a volume so that during a period of at least two hours when there is very little or no water flow through the tank, the water temperature in the tank would not rise by more than 10 degrees.
Brief Description of the Drawing
In the accompanying drawing there is schematically depicted a heat exchanger for 10 the air conditioning refrigeration system of a hotel.
Detailed Description of the Preferred Embodiment
In the accompanying drawing there is schematically depicted a heat exchanger 10. The heat exchanger 10 has an inlet 11 to be connected to the mains pressure water supply system. The inlet 11 is also provided with a non-return valve 12 restricting water to flow
15 in the direction of the arrow 13. A pressure limiting valve 14 is also provided to limit the pressure of water delivered to the tank 15. The tank 15 is also provided with an outlet 16 connected to the normal water distribution network of a hotel. Water passes from the inlet 11 to the outlet 16.
The tank 15 has a side wall 17 through which there passes conduits 18 connected to
20 a further conduit in the form of a coil 19 which forms the condensor for a refrigeration system. The refrigeration system would be part of the air conditioning system of the hotel. Refrigerant is delivered to the coil 19 and passes in the direction of the arrow 20. A safety head pressure control 21 is also provided.
Preferably a safety pressure release valve 22 is provided. In this example, the valve
25 22 is mounted directly on the tank 15. However it could be part of the outlet 16. A pressure gauge 23 and a temperature gauge 24 are also provided. The valve 22 will vent water from the tank 15 should the pressure therein exceed a predetermined pressure. In this embodiment the tank has an internal volume of approximately 730 litres. This is large relative to the volume of the coil 19.
30 Water passing through the tank 15 causes the refrigerant in the coil 19 to condense.
The tank 15 has a volume which is large relative to the volume of the coil 19, so that during periods of little water use (that is when there is no or very little water flow through the tank 15) water within the tank 15 will continue to cool the coil 19 for at least two to three hours with the water within the tank 15 not increasing in temperature more than
35 10 °C. Under normal water flow conditions, the temperature rise in the water in the tank 15 should only be 2°C to 5 °C.
In one example the tank 15 would have a volume of 750 litres and the coil 19 would have a length of about 30 to 40m. Preferably the coil 19 would consist of two coils each of 18m in length. In another example the tank 15 would have a volume of 1500 litres anu uie υn iv a length of about 60m.
In a still further embodiment the coil 19 may merely receive a liquid (such as water) to be cooled by the water passing through the tank 17. For example the coil 19 may receive the water that would normally circulate in a cooling tower.

Claims

A CLAIMS :
1. A heat exchanger comprising: a tank to receive water under pressure, the tank having an outlet and an inlet between which water passes; a conduit located within the tank and having an inlet and an outlet extending to the exterior of the tank and through which a fluid will pass to be cooled by water removing heat from the conduit; and wherein said tank has a volume which is large relative to the volume of conduit in the tank so that water in the tank will continue to remove heat from the conduit during periods of little or no water flow through the tank.
2. The heat exchanger of claim 1, wherein said conduit is a refrigeration system condensor, so that the water in said tank cools the condensor to cause refrigerant passing therethrough to condense.
3. The heat exchanger of claim 1 or 2, further including a pressure relief valve communicating with the interior of said tank to vent water from within the tank to thereby limit pressure within the tank.
4. The heat exchanger of claim 1, 2 or 3, further including a non-return valve associated with said inlet so that water can exit from within said tank backwards through said inlet.
5. The heat exchanger of any one of claims 1 to 4, further including a pressure regulating valve associated with said inlet to limit the water pressure of the water delivered via said inlet.
6. A heat exchanger substantially as hereinbefore described with reference to the accompanying drawings.
7. In combination, a building having a refrigeration system, and the heat exchanger of any one of claims 1 to 6, wherein said conduit constitutes a condensing coil of the refrigation system.
PCT/AU1994/000054 1993-03-01 1994-02-08 A heat exchanger WO1994020806A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU60335/94A AU6033594A (en) 1993-03-01 1994-02-08 A heat exchanger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPL757393 1993-03-01
AUPL7573 1993-03-01

Publications (1)

Publication Number Publication Date
WO1994020806A1 true WO1994020806A1 (en) 1994-09-15

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ID=3776740

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1994/000054 WO1994020806A1 (en) 1993-03-01 1994-02-08 A heat exchanger

Country Status (1)

Country Link
WO (1) WO1994020806A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29814327U1 (en) * 1998-08-10 1999-12-16 Thesz Michael Georg Warm air heating system
CN101644477B (en) * 2009-09-04 2011-10-12 合肥通用机械研究院 Separate combination type air heat regenerator
JP2013210151A (en) * 2012-03-30 2013-10-10 Calsonic Kansei Corp Integrated cooling system
CN105698393A (en) * 2016-04-14 2016-06-22 安徽丰豪冷却系统有限公司 Novel heat exchanger of improved structure

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133590A (en) * 1962-01-17 1964-05-19 Patterson Kelley Co Temperature controlling fluid storage system
FR2441819A1 (en) * 1978-11-15 1980-06-13 Collard Et A Trolart Sa G Heat exchanger with serpentine tubes - has secondary coil isolated from tank by fitting in vented sleeve in tank
FR2441818A1 (en) * 1978-11-15 1980-06-13 Collard Et A Trolart Sa G Heat exchanger with secondary spiral tubes mounted in outer tube - has spiral outer tube mounted in tank and open to atmospheric pressure to prevent mixing of fluids in exchanger
GB1578505A (en) * 1977-02-02 1980-11-05 Guldager Consult Heat exchangers
SU985692A1 (en) * 1981-07-22 1982-12-30 Предприятие П/Я А-3605 Heat ebchanger
JPS60105888A (en) * 1983-11-14 1985-06-11 Takenaka Komuten Co Ltd Annular piping structure for composite heat exchanging device
JPS60105886A (en) * 1983-11-14 1985-06-11 Takenaka Komuten Co Ltd Pipeline connecting structure for composite heat exchanging device
JPS60105887A (en) * 1983-11-14 1985-06-11 Takenaka Komuten Co Ltd Bent piping structure for composite heat exchanging device
JPS60105889A (en) * 1983-11-14 1985-06-11 Takenaka Komuten Co Ltd Meandering piping structure for composite heat exchanging device
FR2558245A1 (en) * 1984-09-13 1985-07-19 Edouard Serras Paulet Solar heating system
WO1992021921A1 (en) * 1991-05-28 1992-12-10 Lennox Industries Inc. Combined multi-modal air conditioning apparatus and negative energy storage system

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133590A (en) * 1962-01-17 1964-05-19 Patterson Kelley Co Temperature controlling fluid storage system
GB1578505A (en) * 1977-02-02 1980-11-05 Guldager Consult Heat exchangers
FR2441819A1 (en) * 1978-11-15 1980-06-13 Collard Et A Trolart Sa G Heat exchanger with serpentine tubes - has secondary coil isolated from tank by fitting in vented sleeve in tank
FR2441818A1 (en) * 1978-11-15 1980-06-13 Collard Et A Trolart Sa G Heat exchanger with secondary spiral tubes mounted in outer tube - has spiral outer tube mounted in tank and open to atmospheric pressure to prevent mixing of fluids in exchanger
SU985692A1 (en) * 1981-07-22 1982-12-30 Предприятие П/Я А-3605 Heat ebchanger
JPS60105888A (en) * 1983-11-14 1985-06-11 Takenaka Komuten Co Ltd Annular piping structure for composite heat exchanging device
JPS60105886A (en) * 1983-11-14 1985-06-11 Takenaka Komuten Co Ltd Pipeline connecting structure for composite heat exchanging device
JPS60105887A (en) * 1983-11-14 1985-06-11 Takenaka Komuten Co Ltd Bent piping structure for composite heat exchanging device
JPS60105889A (en) * 1983-11-14 1985-06-11 Takenaka Komuten Co Ltd Meandering piping structure for composite heat exchanging device
FR2558245A1 (en) * 1984-09-13 1985-07-19 Edouard Serras Paulet Solar heating system
WO1992021921A1 (en) * 1991-05-28 1992-12-10 Lennox Industries Inc. Combined multi-modal air conditioning apparatus and negative energy storage system

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. 83-806467/44, Class Q78; & SU,A,985 692 (SHEVYAKOVA S.A.), 30 December 1982. *
PATENT ABSTRACTS OF JAPAN, M-421, page 88; & JP,A,60 105 886 (TAKENAKA KOMUTEN K.K.), 11 June 1985. *
PATENT ABSTRACTS OF JAPAN, M-421, page 89; & JP,A,60 105 887 (TAKENAKA KOMUTEN K.K.), 11 June 1985. *
PATENT ABSTRACTS OF JAPAN, M-421, page 89; & JP,A,60 105 888 (TAKENAKA KOMUTEN K.K.), 11 June 1985. *
PATENT ABSTRACTS OF JAPAN, M-421, page 89; & JP,A,60 105 889 (TAKENAKA KOMUTEN K.K.), 11 June 1985. *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29814327U1 (en) * 1998-08-10 1999-12-16 Thesz Michael Georg Warm air heating system
CN101644477B (en) * 2009-09-04 2011-10-12 合肥通用机械研究院 Separate combination type air heat regenerator
JP2013210151A (en) * 2012-03-30 2013-10-10 Calsonic Kansei Corp Integrated cooling system
CN105698393A (en) * 2016-04-14 2016-06-22 安徽丰豪冷却系统有限公司 Novel heat exchanger of improved structure

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