GB2460888A - Heating system comprising a boiler and a heat pump - Google Patents

Heating system comprising a boiler and a heat pump Download PDF

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Publication number
GB2460888A
GB2460888A GB0810539A GB0810539A GB2460888A GB 2460888 A GB2460888 A GB 2460888A GB 0810539 A GB0810539 A GB 0810539A GB 0810539 A GB0810539 A GB 0810539A GB 2460888 A GB2460888 A GB 2460888A
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United Kingdom
Prior art keywords
heat
water
circuit
heating
heat pump
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Granted
Application number
GB0810539A
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GB2460888B (en
GB0810539D0 (en
Inventor
Matthew Lee
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Individual
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Individual
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Priority to GB0810539.7A priority Critical patent/GB2460888B/en
Publication of GB0810539D0 publication Critical patent/GB0810539D0/en
Publication of GB2460888A publication Critical patent/GB2460888A/en
Application granted granted Critical
Publication of GB2460888B publication Critical patent/GB2460888B/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • 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
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F24D11/0221—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with solar energy
    • 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
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F24D11/0228—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with conventional heater
    • 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
    • F24D12/00—Other central heating systems
    • F24D12/02—Other central heating systems having more than one heat source
    • 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
    • F24D2200/04—Gas or oil fired boiler
    • 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
    • F24D2200/12—Heat pump
    • 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
    • F24D2200/14—Solar energy
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/06—Heat exchangers
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/08—Storage tanks
    • 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
    • F24D2240/00—Characterizing positions, e.g. of sensors, inlets, outlets
    • F24D2240/10—Placed within or inside of
    • 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
    • F24D2240/00—Characterizing positions, e.g. of sensors, inlets, outlets
    • F24D2240/22—Placed at bottom position
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/40—Geothermal heat-pumps
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

A heating system comprises a water cylinder 16 with a heat exchange coil 14 located within it, a boiler unit 10 and a heat pump 30. The boiler unit is arranged to supply heated fluid through a heat exchange coil circuit 12 connected to the heat exchange coil to heat the water within the water cylinder, and to a heating circuit 20, 24, which may incorporate a series of radiators 22 or may be in the form of an underfloor heating system. The heat pump unit has an input side 32 and an output side 34, where the output side is connected to output heat energy to the heat exchange coil circuit and/or the heating circuit. Preferably, the input side of the heat pump is either supplied with fluid heated by the water within the water cylinder or supplied with water heated by the boiler unit. The input side of the heat pump may be connected to a return side of the heating circuit or connected to an extension to a solar circuit.

Description

HEATING SYSTEM
This invention relates to a heating system, for example for use in providing the hot water and space heating to a domestic building. However, it will be appreciated that the invention is not restricted to such use and may be used in other applications.
A domestic hot water and heating system typically comprises a boiler, for example of gas or oil fired form, arranged to heat the water or other fluid passing around a space heating system including a series of radiators. The water or other fluid heated by the boiler is also passed through a heating coil located within a water cylinder to transfer heat energy to the water within the water cylinder. Heating systems of this general type are well known and have been in use for many years.
It is desirable to be able to improve the operating efficiency of heating systems to reduce the amount of energy used by the boiler. For example, it is known to use solar panels to provide some hot water, thereby reducing the amount of hot water which must be provided using the boiler alone, and thus permitting energy savings to be made.
Geothermal heat pump systems are also known which allow some savings to be made by making use of ground-source heat energy.
According to the present invention there is provided a heating system comprising a water cylinder having a heat exchange coil provided therein, a boiler unit arranged to supply heated fluid through a heat exchange coil circuit connected to the heat exchange coil to heat the water within the water cylinder, and to a heating circuit, and a heat pump unit having an input side and an output side, the output side being connected to the heat exchange coil circuit and/or the heating circuit to output heat energy thereto.
The input side of the heat pump may be supplied with fluid heated by the water within the water cylinder. Alternatively, it may be supplied with water heated by the boiler unit, for example it may be connected to a return side of the heating circuit or an extension to a solar circuit.
The invention will further be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a schematic representation of a heating system in accordance with one embodiment of the invention; and Figure 2 illustrates an alternative scheme.
Referring to Figure 1 there is illustrated a heating system comprising a boiler unit 10, for example of gas or oil fired form, or electrically powered form, ananged to supply heated fluid around an output circuit 11. The output circuit 11 is connected to a heat exchange coil circuit 12 incorporating a first heat exchange coil 14 located within a water cylinder 16. It will be appreciated that, in use, heat energy imparted by the boiler unit 10 to the fluid within the output circuit 11 and heat exchange coil circuit 12 is transferred to the water within the water cylinder 16, heating the water and thus providing a domestic hot water supply.
A second heat exchange coil 18 is provided which is connected to a solar panel to permit solar energy to be used in heating the water within the water cylinder 16. When atmospheric conditions permit, the solar energy alone may be used to heat the water or, when the atmospheric conditions are less favourable, the boiler unit 10 operates to supplement the solar energy in providing the required quantity/temperature of hot water.
The output circuit 11 from the boiler unit 10 further serves to supply heated fluid to a first, space heating circuit 20 incorporating a series of radiators 22, and to a second heating circuit 24 in the form of an underfloor heating system.
The water cylinder 16 further includes a third heat exchange coil 26 connected to the second heating circuit 24 and arranged such that, when conditions permit, heat energy may be extracted from the water within the hot water cylinder 16 by the third heat exchange coil 26 and used in the operation of the second heating circuit 24.
In accordance with the invention the heating system further comprises a heat pump 30 having an input side 32 and an output side 34. The heat pump 30 comprises a circuit including a compressor 36, and condenser/heat exchanger 38, an expansion valve 40 and an evaporator 42. The nature of these components will be familiar to a man skilled in the art and so they will not be described in further detail herein. The evaporator 42 is thermally connected, for example via a plated heat exchanger 44 connected, in turn, to lines 46 connectable, to the return side of the second heating circuit 24. It will be appreciated that other thermal connections are possible, and that in some arrangements the heat exchanger 44 may be omitted. The condenser 38 is connected through lines 48 to the output circuit 11.
The heating system described hereinbefore can operate in a number of different modes.
A series of control valves 52 and control pumps 54 are provided to control which of the circuits are active at any given time, thus determining in which mode the system is operating at any given time.
As outlined hereinbefore, the solar panel and second heat exchange coil 18 operate to heat the water in the cylinder 16. When atmospheric conditions are favourable, it may be possible to use just this heat source to provide all of the heat requirement to the cylinder 16. However, when this is not possible, the boiler unit 10 and heat exchange coil circuit 12 are used to heat or supplement the heating of the water within the cylinder 16. By appropriate control over the control valves 52 and pumps 54, the output of the boiler unit 10 may also be used to operate the first and second heating circuits 20, 24.
If desired, the second heating circuit 24 may, alternatively, be heated using heat energy derived from the cylinder 16 by controlling the control valves 52 and pumps 54 in such a manner that fluid from the third heat exchange coil 26, heated by the water in the cylinder 16, is supplied to the second heating circuit 24. Thus, for example, in situations where there is sufficient heat energy available in the water within the cylinder 16 operation of the boiler unit 10 to provide the heat energy for the second heating circuit 24 can be avoided. It is envisaged that, when heating a room from cold, the boiler unit 10 will be required to provide the heat energy for the second heating circuit 24, but that once the room has reached a desired temperature, maintaining the room at the desired temperature could be achieved, for at least some of the time, by extracting heat from the cylinder 16 in this manner. Although not illustrated, the heating system could be modified to allow the first heating circuit 20 and the/any additional water/fluid based supplementary heating/solar system to operate in a similar manner.
As illustrated, the input side 32 of the heat pump 30 can, depending upon the operation of the control valves 52 and pumps 54, extract heat energy from the relatively cool fluid in the return side of the second heating circuit 24. The heat energy is extracted by the plated heat exchanger 44 and heats the refrigerant within the evaporator 42 of the heat pump 30, causing evaporation and superheating thereof. It is envisaged that the refrigerant temperature will rise from about -18°C to about 20°C in this operation. The compressor 36 pressurises the evaporated refrigerant, further increasing its temperature, and the pressurised evaporated refrigerant is passed to the condenser 38 where heat energy is extracted therefrom, heating the fluid within the line 48. From the condenser 38, the refrigerant passes through the expansion valve 40 where it is cooled to approximately -18°C and back to the evaporator 42. It will be appreciated that the heat pump 30 thus serves to extract heat energy from the lines 46, outputting an increased level of heat energy to the line 48, the increase in the level of heat energy being derived from the electrical supply or other power source used to operate the heat pump 30. The heat energy supplied to the line 48 can, depending upon the operation of the control valves 52 and pumps 54 be used to heat the water within the cylinder 16 or to operate the second heating circuit 24.
Although in the arrangement described hereinbefore, the heat energy applied to the input side 32 of the heat pump 30 is derived from the return side of the second heating circuit 24, this need not always be the case, and the invention is also applicable to arrangements where the source of heat energy used in this manner is the water cylinder 16, the first heating circuit 20, the solar circuit containing the second heat exchange coil 18 and solar panel or even the mains cold water supply. Likewise, the additional heat energy from the heat pump 30 could be used in a range of applications including, for example, the operation of the first heating circuit 20 or the heating of a swimming pool orhottub.
It is envisaged that the heat pump 30 will be used to provide additional background heat, for example to maintain a room at a desired temperature once the boiler unit 10 has been used to provide the heat energy necessary to initially heat the room to that temperature, thereby allowing the temperature of the room to be maintained in a cost effective, efficient manner and avoiding unnecessary firing of the boiler unit 10.
Figure 2 illustrates an alternative configuration in which the range of sources from which heat energy is supplied to the input side 32 of the heat pump 30 is increased. In the arrangement of Figure 2, such heat energy may be derived from the solar circuit, the return side of the underfloor heating circuit 24, or even the hot water within the cylinder 16. It also shows an increased range of the heat energy derived from the cylinder 16 using the heat exchange coil 26.
It will be appreciated that a wide range of modifications and alterations may be made to the arrangements described hereinbefore without departing from the scope of the invention. For example, as mentioned above, arrangements are envisaged in which the heat exchanger 44 is omitted. If the plated heat exchanger 44 is present, it could take the form of a multi layer/sectioned plated heat exchanger thereby permitting multi-connection of all or a wide range of the possible energy sources. Other modifications are also possible.

Claims (5)

  1. CLAIMS: 1. A heating system comprising a water cylinder having a heat exchange coil provided therein, a boiler unit arranged to supply heated fluid through a heat exchange coil circuit connected to the heat exchange coil to heat the water within the water cylinder, and to a heating circuit, and a heat pump unit having an input side and an output side, the output side being connected to the heat exchange coil circuit and/or the heating circuit to output heat energy thereto.
  2. 2. A system according to Claim 1, wherein the input side of the heat pump is supplied with fluid heated by the water within the water cylinder.
  3. 3. A system according to Claim 1, wherein the input side of the heat pump is supplied with water heated by the boiler unit. * :
  4. 4. A system according to Claim 3, wherein the input side of the heat pump is *... * *
    S... . . connected to a return side of the heating circuit. S. -* S **
  5. 5. A system according to Claim 3, wherein the input side of the heat pump is *S..: : 20 connected to an extension to a solar circuit.
GB0810539.7A 2008-06-10 2008-06-10 Heating system Expired - Fee Related GB2460888B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0810539.7A GB2460888B (en) 2008-06-10 2008-06-10 Heating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0810539.7A GB2460888B (en) 2008-06-10 2008-06-10 Heating system

Publications (3)

Publication Number Publication Date
GB0810539D0 GB0810539D0 (en) 2008-07-16
GB2460888A true GB2460888A (en) 2009-12-23
GB2460888B GB2460888B (en) 2013-01-16

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101718452B (en) * 2009-11-20 2012-09-05 清华大学 Geothermal-based central heating system using thermal-increasing heat supply machine unit and method thereof
ITMI20131947A1 (en) * 2013-11-22 2015-05-23 Aggradi Walter Ferrari AIR CONDITIONING SYSTEM, RELATED PERIPHERAL AIR CONDITIONING UNIT AND HYDRAULIC NETWORK REDEVELOPMENT PROCESS FOR HEATING.
BE1021387B1 (en) * 2012-10-05 2015-11-12 Building Energy Nv ECOLOGICAL HEATING SYSTEM

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2451544A1 (en) * 1974-10-30 1976-05-20 Bosch Gmbh Robert Heat pump for space heating - has additional circuit and controls to provide domestic hot water through calorifier
DE3027609A1 (en) * 1980-07-21 1982-02-04 BFO Blechverarbeitung und Fördertechnik Oberhessen GmbH Kesselwerk & Co KG, 6424 Grebenhain Double section hot water tank - has separately heated upper and lower cylinders connected by flanged joint incorporating divider plate
DE3115697A1 (en) * 1981-04-18 1982-11-04 Karl-Otto 5439 Höhn Hein Installation for heating buildings and for heating service water
DE3243082C1 (en) * 1982-11-22 1984-03-22 KKW Kulmbacher Klimageräte-Werk GmbH, 8650 Kulmbach Heating plant with a controllable heating boiler and an absorption heat pump
DE3520938A1 (en) * 1984-07-02 1986-01-09 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Hot-water heating system
GB2455395A (en) * 2007-11-15 2009-06-10 Francis Bernard Welch Heating system comprising a heat pump and a thermal store

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2451544A1 (en) * 1974-10-30 1976-05-20 Bosch Gmbh Robert Heat pump for space heating - has additional circuit and controls to provide domestic hot water through calorifier
DE3027609A1 (en) * 1980-07-21 1982-02-04 BFO Blechverarbeitung und Fördertechnik Oberhessen GmbH Kesselwerk & Co KG, 6424 Grebenhain Double section hot water tank - has separately heated upper and lower cylinders connected by flanged joint incorporating divider plate
DE3115697A1 (en) * 1981-04-18 1982-11-04 Karl-Otto 5439 Höhn Hein Installation for heating buildings and for heating service water
DE3243082C1 (en) * 1982-11-22 1984-03-22 KKW Kulmbacher Klimageräte-Werk GmbH, 8650 Kulmbach Heating plant with a controllable heating boiler and an absorption heat pump
DE3520938A1 (en) * 1984-07-02 1986-01-09 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Hot-water heating system
GB2455395A (en) * 2007-11-15 2009-06-10 Francis Bernard Welch Heating system comprising a heat pump and a thermal store

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101718452B (en) * 2009-11-20 2012-09-05 清华大学 Geothermal-based central heating system using thermal-increasing heat supply machine unit and method thereof
BE1021387B1 (en) * 2012-10-05 2015-11-12 Building Energy Nv ECOLOGICAL HEATING SYSTEM
ITMI20131947A1 (en) * 2013-11-22 2015-05-23 Aggradi Walter Ferrari AIR CONDITIONING SYSTEM, RELATED PERIPHERAL AIR CONDITIONING UNIT AND HYDRAULIC NETWORK REDEVELOPMENT PROCESS FOR HEATING.
WO2015075199A1 (en) * 2013-11-22 2015-05-28 Ferrari Aggradi Walter Air conditioning system, peripheral air-conditioning unit thereof and water pipeline upgrading method for heating purposes
US10612792B2 (en) 2013-11-22 2020-04-07 Walter FERRARI AGGRADI Air conditioning system, peripheral air-conditioning unit thereof and water pipeline upgrading method for heating purposes

Also Published As

Publication number Publication date
GB2460888B (en) 2013-01-16
GB0810539D0 (en) 2008-07-16

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