GB2608070A - Heating arrangement - Google Patents

Heating arrangement Download PDF

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Publication number
GB2608070A
GB2608070A GB2213558.6A GB202213558A GB2608070A GB 2608070 A GB2608070 A GB 2608070A GB 202213558 A GB202213558 A GB 202213558A GB 2608070 A GB2608070 A GB 2608070A
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GB
United Kingdom
Prior art keywords
air
leg
heat exchanger
fan
heating arrangement
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.)
Granted
Application number
GB2213558.6A
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GB2608070B (en
GB202213558D0 (en
Inventor
Adamson Peter
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Individual
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Individual
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Filing date
Publication date
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Priority to GB2213558.6A priority Critical patent/GB2608070B/en
Publication of GB202213558D0 publication Critical patent/GB202213558D0/en
Publication of GB2608070A publication Critical patent/GB2608070A/en
Application granted granted Critical
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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
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • 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
    • F24H1/0018—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/024—Units comprising pumps and their driving means the driving means being assisted by a power recovery turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • 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
    • 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
    • F28D1/06—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 the heat-exchange conduits forming part of, or being attached to, the tank containing the body of fluid
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • F24D2200/22—Ventilation air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
    • 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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
    • F28D2020/0078—Heat exchanger arrangements

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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A water heating arrangement 10 comprises an air-to-air heat exchanger 14 having a first leg 22 and a second leg 24 in a heat exchange relationship, and a water-to-air heat exchanger 16. The first leg includes means, such as first and second fans 32,34 and a throttling device 44 (e.g. nozzle), for increasing the pressure and temperature of air 26 passing through the first leg. Air 12 flowing through the second leg is in a heat exchange relationship with water 18 to be heated, ideally in a water tank 18. The second leg includes means, such as further first and second fans 52,54 and a further throttling device 64 (e.g. nozzle), for increasing the pressure and temperature of the air flowing through the second leg. The first and second legs may include respective turbines 40,60 that drive the second fan and further second fan via respective shafts 38,58. Each leg may include a respective air inlet to draw in ambient air 30 and a respective air outlet.

Description

HEATING ARRNAGEMENT
FIELD
This disclosure relates to a heating arrangement, for example an arrangement for facilitating heating of water using external air.
BACKGROUND
Water used for space heating may be heated directly in a boiler where gas or oil is burned, or by passing the water over an electrical heating element. Domestic hot water (DHW) may be heated by passing directly heated water through a coil in a hot water tank, or by locating an electric heating element in a hot water tank.
The present disclosure relates to an alternative heating arrangement.
SUMMARY
According to the present disclosure there is provided a heating arrangement comprising: an air-to-air heat exchanger having a first leg and a second leg in a heat exchange relationship, and including first means for increasing the pressure and temperature of air passing through the first leg, and an air-to-water heat exchanger where air flowing from the second leg of the air-to-air heat exchanger is in a heat exchange relationship with water to be heated and including second means for increasing the pressure and temperature of the air flowing from the second leg of the air-to-air heat 25 exchanger.
The first leg and the second leg may include respective inlets. The inlets may be arranged to allow external air to be drawn into the first and second legs.
The first and second means may each include a respective first fan. Each first fan may include an electric drive motor and the motor may be arranged such that air is drawn or blown over the motor by the fan.
The first and second means may each include a respective throttling device, such as a nozzle. The throttling device may facilitate creation of a back pressure upstream of the device. A turbine may be provided downstream of the throttling device and rotation of the turbine may drive a second fan, which may be located downstream of the first fan.
The air-to-water heat exchanger may comprise a water tank.
Another aspect of the present disclosure relates to a heating arrangement comprising: a first air-to-air heat exchanger having a first leg and a second leg in a heat exchange relationship, the first leg including a first fan and a first throttling device for increasing the pressure and temperature of air passing through the first leg, and a first turbine being provided downstream of the first throttling device and rotation of the first turbine driving a second fan located downstream of the first fan, and a second air-to-water heat exchanger where air flowing from the second leg of the first air-to-air heat exchanger is in a heat exchange relationship with water to be heated and including a third fan and a second throttling device for increasing the pressure and temperature of the air flowing from the second leg of the first air-to-air heat exchanger and a second turbine being provided downstream of the second throttling device and rotation of the second turbine driving a fourth fan located downstream of the third fan.
BRIEF DESCRIPTION OF THE DRAWING
These and other aspects of the present disclosure will now be described, by way of example, with reference to the accompanying drawing, in which Figure 1 is a schematic of a heating arrangement in accordance 30 with an example of the present disclosure.
DETAILED DESCRIPTION OF THE DRAWING
Figure 1 is a schematic of a heating arrangement 10 in accordance with an example of the present disclosure. As will be described, air 12, typically outside/external air, is heated in a first air-to-air heat exchanger 14 and then further heated and passed through a second air-to-water heat exchanger 16. In the second heat exchanger 16 the air 12 transfers heat to water 18 held in a water tank 20.
The air-to-air heat exchanger 14 includes first and second legs 22, 24, the air 12 destined for the air-to-water heat exchanger 16 passing through the second leg 24. The first leg 22 provides passage for air 26 which has been drawn through an inlet 28 from the outside environment 30. The first leg 22 includes first and second fans 32, 34. The first fan 32 is driven by an electric motor 36 located within the airstream, such that the motor 36 is cooled by the passing air 26. The second fan 34 is located downstream of the first fan 32 and is driven by a shaft 38 coupled to a turbine 40 located beyond an outlet 42 from the first leg 22.
A throttling device in the form of a nozzle 44 is provided upstream of the first leg outlet 42 such that a back pressure is created in the air 26 between the fans 32, 34 and the nozzle 44. The air 26 is accelerated by passing through the nozzle 44, and the high velocity air 26 is directed towards and drives the turbine 40. The rotation of the turbine 40 is used to drive the shaft 38 which in turn drives the second fan 34. The air 26 is exhausted to the outside environment 30.
The first and second legs 22, 24 of the heat exchanger 14 are in a heat exchange relationship such that heat energy may be transferred from the heating air 26 in the first leg 22 to the heated air 12 in the second leg 24 The second leg 24 includes a proximal or upstream part 24a passing 30 through the first heat exchanger 14 and a distal or downstream part 24b which passes through the second heat exchanger 16, the distal part 24b extending through the water tank 20.
In an arrangement which is somewhat similar to the first leg of the heat exchanger 22, directly upstream of the water tank 20 the distal part 24b includes first and second fans 52, 54. The first fan 52 is driven by an electric motor 56 located within the airstream, such that the motor 56 is cooled by the air 12; in other words, heat is transferred from the motor 56 to the air 12. The second fan 54 is located downstream of the first fan 52 and is driven by a shaft 58 coupled to a turbine 60 located beyond an outlet 62 from the distal part of the second leg 24b.
A throttling device in the form of a nozzle 64 is provided upstream of the second leg outlet 62 such that a back pressure is created in the air 12 between the fans 52, 54 and the nozzle 64. The air 12 is accelerated by passing through the nozzle 64, and the high velocity air 12 is directed towards and drives the turbine 60. The rotation of the turbine 60 is used to drive the shaft 58 which in turn drives the second fan 54. The air 12 is exhausted to the outside environment 30.
The distal part of the second leg 24b and the water tank 20 are in a heat exchange relationship such that heat energy may be transferred from the heating air 12 in the distal part of the second leg 24b to the heated water 18 in the tank 20.
In operation, the pressure of the air 26 in the first leg 22 is increased by the operation of the fans 32, 34 and the presence of the nozzle 44 at the outlet 42. The increase in pressure creates a corresponding increase in temperature. By virtue of the heat exchange relationship in the first heat exchanger 14, heat energy is transferred from the warmer air 26 in the first leg 22 to the cooler air 12 in the second leg 24, thus warming the air 12. In the distal part of the second leg 24b the pressure of the air 12 is increased by the operation of the fans 52, 54 and the presence of the nozzle 30 64 at the outlet 62. The increase in pressure creates a corresponding increase in temperature. By virtue of the heat exchange relationship in the second heat exchanger 16, heat energy is transferred from the warmed air 12 in the distal part 24b to the water 18 in the tank 20.
The heated water 18 may be utilised to provide space heating and may supplement or replace a gas or oil-fired boiler. Alternatively, or in addition, the heated water may be utilised to provide a domestic hot water supply.
In other examples, the air supply for one or both of the first and second legs 22, 24 may be drawn from an internal space. Also, in further examples the air outlet from one or both of the first and second legs 22, 24 may direct the exhaust air into an internal space.
The skilled person will appreciate that the Figure is a schematic and simplified representation of the heating arrangement 10. For example, the heat exchange arrangement provided in the first heat exchanger 14 may take any appropriate form, such a simple heat-conducting separator, or one of the legs may include a coil or some other serpentine path to provide a larger area heat transfer surface. Similarly, in the second heat exchanger the distal part 24b may comprise a copper coil extending through the water tank 20.
The skilled person will further appreciate that the description and drawing are intended to be merely exemplary of the disclosure. For example, where reference is made to fans, turbines, nozzles and the like, the skilled person will understand that the same or similar functions could be provided by other devices. Further, in the illustrated example the means for increasing the pressure and thus temperature in the first leg 22 and the distal part 24b are similar, however in other examples different means could be provided.
REFERENCE NUMERALS: heating arrangement 10 air 12 first/air-to-air heat exchanger 14 second/air-to-water heat exchanger 16 water 18 water tank 20 first and second legs 22, 24 proximal and distal second leg parts 24a, 24b air 26 inlet 28 outside environment 30 first and second fans 32, 34 electric motor 36 shaft 38 turbine 40 outlet 42 nozzle 44 first and second fans 52, 54 electric motor 56 shaft 58 turbine 60 outlet 62 nozzle 64

Claims (9)

  1. CLAIMS1. A heating arrangement comprising: an air-to-air heat exchanger having a first leg and a second leg in a heat exchange relationship, and including first means for increasing the pressure and temperature of air passing through the first leg, and an air-to-water heat exchanger where air flowing from the second leg of the air-to-air heat exchanger is in a heat exchange relationship with water to be heated and including second means for increasing the pressure and temperature of the air flowing from the second leg of the air-to-air heat exchanger.
  2. 2. The heating arrangement of claim 1, wherein the first leg and the second leg include respective inlets arranged to allow external air to be drawn into the first and second legs.
  3. 3. The heating arrangement of claim 1 or 2, wherein the first and second means include a first fan.
  4. 4. The heating arrangement of claim 3, wherein the first fan includes an electric drive motor arranged such that air is drawn or blown over the motor by the fan.
  5. 5. The heating arrangement of any preceding claim, wherein the first and second means includes a throttling device.
  6. 6. The heating arrangement of claim 5, wherein the throttling device comprises a nozzle.
  7. 7. The heating arrangement of claim 5 or 6 when dependent on claim 3, wherein a turbine is provided downstream of the throttling device and rotation of the turbine drives a second fan located downstream of the first fan.
  8. 8. The heating arrangement of any preceding claim, wherein the air-towater heat exchanger comprises a water tank.
  9. 9. A heating arrangement comprising: an air-to-air heat exchanger having a first leg and a second leg in a heat exchange relationship, the first leg including a first fan and a first throttling device for increasing the pressure and temperature of air passing through the first leg, and a first turbine being provided downstream of the first throttling device and rotation of the first turbine driving a second fan located downstream of the first fan, and an air-to-water heat exchanger where air flowing from the second leg of the air-to-air heat exchanger is in a heat exchange relationship with water to be heated and including a third fan and a second throttling device for increasing the pressure and temperature of the air flowing from the second leg of the air-to-air heat exchanger,
GB2213558.6A 2022-09-15 2022-09-15 Heating arrangement Active GB2608070B (en)

Priority Applications (1)

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GB2213558.6A GB2608070B (en) 2022-09-15 2022-09-15 Heating arrangement

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Application Number Priority Date Filing Date Title
GB2213558.6A GB2608070B (en) 2022-09-15 2022-09-15 Heating arrangement

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GB202213558D0 GB202213558D0 (en) 2022-11-02
GB2608070A true GB2608070A (en) 2022-12-21
GB2608070B GB2608070B (en) 2023-09-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102128493A (en) * 2010-01-14 2011-07-20 良品机械股份有限公司 Atmospheric heat source type heat pump water heater with open loop
CN102589126A (en) * 2012-02-10 2012-07-18 蒋富国 Air heat based water heater
CN203298470U (en) * 2013-06-04 2013-11-20 王海平 Air-conditioner water heater using compressed air energy
CN108954821A (en) * 2018-08-10 2018-12-07 大连民族大学 A kind of open type heat pump hot water preparation method of air circulation
CN108981160A (en) * 2018-08-10 2018-12-11 大连民族大学 A kind of heat supply method of the open type heat pump of air circulation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102128493A (en) * 2010-01-14 2011-07-20 良品机械股份有限公司 Atmospheric heat source type heat pump water heater with open loop
CN102589126A (en) * 2012-02-10 2012-07-18 蒋富国 Air heat based water heater
CN203298470U (en) * 2013-06-04 2013-11-20 王海平 Air-conditioner water heater using compressed air energy
CN108954821A (en) * 2018-08-10 2018-12-07 大连民族大学 A kind of open type heat pump hot water preparation method of air circulation
CN108981160A (en) * 2018-08-10 2018-12-11 大连民族大学 A kind of heat supply method of the open type heat pump of air circulation

Also Published As

Publication number Publication date
GB2608070B (en) 2023-09-06
GB202213558D0 (en) 2022-11-02

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Effective date: 20230927