EP3816534A2 - Chauffage amélioré thermiquement - Google Patents

Chauffage amélioré thermiquement Download PDF

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Publication number
EP3816534A2
EP3816534A2 EP20203117.5A EP20203117A EP3816534A2 EP 3816534 A2 EP3816534 A2 EP 3816534A2 EP 20203117 A EP20203117 A EP 20203117A EP 3816534 A2 EP3816534 A2 EP 3816534A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
refrigerant
heat
outdoor
hvac unit
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.)
Pending
Application number
EP20203117.5A
Other languages
German (de)
English (en)
Other versions
EP3816534A3 (fr
Inventor
Abdelrahman Elsherbini
Abbas A. Alahyari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Original Assignee
Carrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carrier Corp filed Critical Carrier Corp
Publication of EP3816534A2 publication Critical patent/EP3816534A2/fr
Publication of EP3816534A3 publication Critical patent/EP3816534A3/fr
Pending legal-status Critical Current

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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
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/065—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators using fluid fuel
    • 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
    • F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/12—Hot-air central heating systems; Exhaust gas central heating systems using heat pumps
    • 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
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/26—Refrigerant piping
    • F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
    • 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
    • F24F5/0096—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 combined with domestic apparatus
    • 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
    • F24H9/00—Details
    • F24H9/0052—Details for air heaters
    • F24H9/0057—Guiding means
    • F24H9/0063—Guiding means in air channels
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/06—Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure
    • F25B1/08—Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure using vapour under pressure
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F24D2200/32—Heat sources or energy sources involving multiple heat sources in combination or as alternative heat sources
    • 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
    • F24D2220/02—Fluid distribution means
    • F24D2220/0271—Valves
    • 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
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/34—Heater, e.g. gas burner, electric air heater

Definitions

  • the subject matter disclosed herein relates to heating systems. More particularly, the subject matter disclosed herein relates to a thermally enhanced heating system and method for thermally enhancing a HVAC system.
  • Furnaces typically contain four different components: a burner that produces heat by burning a fuel source, a heat exchanger to transfer heat to the air, a fan to direct air through the furnace, and a conduit for exhausting flue gas produced by the burning of the fuel source.
  • the fuel sources most commonly used by furnaces are natural gas, propane gas, or heating oil.
  • heat pumps can also provide cooling in the summer months due to their ability to switch the flow of the refrigerant.
  • Heat pumps typically contain four different components: a compressor to both move and increase the pressure of the refrigerant, a heat exchanger for transferring heat either to or from the refrigerant, a reversing valve for changing the direction the refrigerant flows, and an expansion valve for regulating the flow of the refrigerant.
  • a compressor to both move and increase the pressure of the refrigerant
  • a heat exchanger for transferring heat either to or from the refrigerant
  • a reversing valve for changing the direction the refrigerant flows
  • an expansion valve for regulating the flow of the refrigerant.
  • heat pumps ordinarily use electricity as an energy source. Due to the fact that heat pumps pull heat from outdoor air, as temperatures drop, less heat is available in the outdoor air, and thus the heat pump becomes less capable of supplying the necessary heat for the home.
  • duel fuel systems utilize both a furnace and a heat pump.
  • a duel fuel system automatically switches the heating source between the furnace and the heat pump. When temperatures are more moderately cold the duel fuel system uses the heat pump to supply heat. When temperatures drop below the level at which the heat pump is capable of supplying the necessary heat for the home, the duel fuel system switches to the furnace to supply heat.
  • the duel fuel system provides increased efficiency when compared to a standalone furnace and increased capability with colder temperatures when compared to a standalone heat pump, the duel fuel system generally is more expensive due to the need for both systems.
  • a thermally enhanced heating system which includes an indoor HVAC unit and an outdoor HVAC unit, the indoor HVAC unit including a first heat exchanger for transferring heat from a refrigerant, a second heat exchanger for transferring heat from a fuel source, and a third heat exchanger for transferring heat to the refrigerant, the outdoor HVAC unit including an outdoor heat exchanger for transferring heat from an outdoor air to the refrigerant, a pump operably coupled to the first heat exchanger and the third heat exchanger, the pump configured to circulate the refrigerant, and an ejector including a first inlet, a second inlet, and an outlet, wherein the first inlet is operably coupled to the outdoor heat exchanger, the second inlet is operably coupled to the third heat exchanger, and the outlet is operably coupled to the first heat exchanger.
  • the indoor HVAC unit may further include a fan.
  • the first heat exchanger may be upstream of the fan, and the second heat exchanger and third heat exchanger may be downstream of the fan.
  • the third heat exchanger may be downstream of the second heat exchanger.
  • the first heat exchanger, second heat exchanger, and third heat exchanger may be downstream of the fan.
  • the third heat exchanger may be downstream of the second heat exchanger, and the first heat exchanger may be adjacent to the second heat exchanger and the third heat exchanger.
  • the second heat exchanger may be operably coupled to a conduit, and the third heat exchanger may be disposed within the conduit.
  • the outdoor HVAC unit may further include a valve operably coupled to the outdoor heat exchanger and the first heat exchanger.
  • the outdoor HVAC unit may further include a fan.
  • the fuel source may include at least one of: a natural gas, propane, and a heating oil.
  • the ejector may be a single phase ejector.
  • a method for thermally enhancing a HVAC system including, operating an outdoor HVAC unit to circulate a refrigerant through a first refrigerant circuit and a second refrigerant circuit, operating a heat exchanger to transfer heat to the first refrigerant circuit, and operating the outdoor HVAC unit to combine the refrigerant in the first refrigerant circuit and the second refrigerant circuit.
  • the outdoor HVAC unit may include a pump to circulate the refrigerant through the first refrigerant circuit and the second refrigerant circuit.
  • the outdoor HVAC unit may include an ejector to combine the refrigerant in the first refrigerant circuit and the second refrigerant circuit.
  • the method may further include operating a fan to circulate an indoor air through an indoor HVAC unit, wherein the heat exchanger may transfer heat from the indoor air to the first refrigerant circuit.
  • the method may further include operating a second heat exchanger to transfer heat from a fuel source, the second heat exchanger operatively coupled to a conduit, wherein the heat exchanger may be disposed in the conduit.
  • the thermally enhanced heating system includes an indoor HVAC unit and an outdoor HVAC unit.
  • the outdoor HVAC unit enables the combination of heat generated by the indoor HVAC unit with heat generated by the outdoor HVAC unit.
  • the outdoor HVAC unit includes a pump to circulate a refrigerant through a first refrigerant circuit and a second refrigerant circuit.
  • the pump in the outdoor HVAC unit is different than the compressor typically used in a heat pump. Instead of increasing the pressure of a vapor refrigerant, as a compressor does within a heat pump, the pump in the outdoor HVAC unit increases the pressure of a liquid refrigerant.
  • the thermally enhanced heating system and method for thermally enhancing a HVAC system are able to reduce the overall cost of the system and reduce electricity consumption, as the pump uses much less electricity than a typical compressor.
  • the thermally enhanced heating system 100 may be described as a HVAC system.
  • the thermally enhanced heating system 100 includes an indoor HVAC unit 300 and an outdoor HVAC unit 200.
  • the indoor HVAC unit 300 includes a first heat exchanger 310 for transferring heat from a refrigerant, a second heat exchanger 320 for transferring heat from a fuel source, and a third heat exchanger 330 for transferring heat to the refrigerant.
  • the outdoor HVAC unit 200 includes an outdoor heat exchanger 210 for transferring heat from an outdoor air 240 to the refrigerant, a pump 220 operatively coupled to the first heat exchanger 310 and the third heat exchanger 330, the pump 220 configured to circulate the refrigerant, and an ejector 230 including a first inlet 231, a second inlet 232, and an outlet 233 (shown in FIG. 4 ), wherein the first inlet 231 is operatively coupled to the outdoor heat exchanger 210, the second inlet 232 is operatively coupled to third heat exchanger 330, and the outlet 233 is operatively coupled to the first heat exchanger 310.
  • the outdoor HVAC unit 200 includes a fan to move the outdoor air 240 through the outdoor heat exchanger 210.
  • the indoor HVAC unit 300 includes a fan 340.
  • the thermally enhanced heating system 100 includes the first heat exchanger 310 upstream of the fan 340, and the second heat exchanger 320 and the third heat exchanger 330 downstream of the fan 340. Potential examples of thermally enhanced heating systems 100 depicting such configuration are shown in FIG. 1 and FIG. 3 .
  • the third heat exchanger 330 is downstream of the second heat exchanger 320. In instances where the third heat exchanger 330 is downstream of the second heat exchanger 320, at least a portion of the heat being transferred to the refrigerant occurring in the third heat exchanger 330 may be generated by the second heat exchanger 320.
  • Potential examples of thermally enhanced heating systems 100 depicting such configuration are shown in FIG. 1 and FIG. 2 .
  • the first heat exchanger 310, second heat exchanger 320, and third heat exchanger 330 are downstream of the fan 340.
  • a thermally enhanced heating system 100 depicting such a configuration is shown in FIGs. 2 and 3 .
  • the first heat exchanger 310, second heat exchanger 320, and third heat exchanger 330 are configured to effectuate the transfer of heat either to or from the refrigerant.
  • the third heat exchanger 330 is downstream of the second heat exchanger 320, and the first heat exchanger 310 is adjacent to the second heat exchanger 320 and the third heat exchanger 330.
  • An example of a thermally enhanced heating system 100 depicting such configuration is shown in FIG. 2
  • the third heat exchanger 330 is configured to transfer heat to the refrigerant.
  • the second heat exchanger 320 is operably coupled to a conduit 360, the third heat exchanger 330 being disposed within the conduit 360.
  • the conduit 360 provides for the exhausting of a flue gas generated in the second heat exchanger 320.
  • An example of a thermally enhanced heating system 100 depicting a third heat exchanger 330 disposed within the conduit is shown in FIG. 3 .
  • the outdoor HVAC unit 200 of the thermally enhanced heating system 100 includes a valve 250.
  • the valve 250 is operably coupled to the outdoor heat exchanger 210 and the first heat exchanger 310.
  • the second heat exchanger 320 in the indoor HVAC unit 300 is capable of transferring heat from a fuel source.
  • the fuel source used by the second heat exchanger 320 includes at least one of: a natural gas, propane gas, and a heating oil.
  • the outdoor HVAC unit 200 includes an ejector 230.
  • the ejector 230 is a single phase ejector (ex. a vapor to vapor ejector).
  • the ejector 230 is used in the outdoor HVAC unit 200 to combine the refrigerant in a first refrigerant circuit 500 and a second refrigerant circuit 400.
  • An example of an ejector 230 is shown in FIG. 4 .
  • These refrigerant circuits 400, 500 may be configured such that heat is transferred either to or from the refrigerant within the thermally enhanced heating system 100.
  • the refrigerant is circulated between a first refrigerant circuit 500 and a second refrigerant circuit 400 to thermally enhance the HVAC system.
  • the method for thermally enhancing the HVAC system preferably includes operating an outdoor HVAC unit 200 to circulate the refrigerant through the first refrigerant circuit 500 and the second refrigerant circuit 400, operating a heat exchanger 330 to transfer heat to the first refrigerant circuit 500, and operating the outdoor HVAC unit 200 to combine the refrigerant in the first refrigerant circuit 500 and the second refrigerant circuit 400.
  • the outdoor HVAC unit 200 includes a pump to circulate the refrigerant through the first refrigerant circuit 500 and the second refrigerant circuit 400.
  • the outdoor HVAC unit includes an ejector 230 to combine the refrigerant in the first refrigerant circuit 500 and the second refrigerant circuit 400.
  • the method may, in certain instances, further include operating a fan to circulate air 350 through an indoor HVAC unit 300, where the heat exchanger 330 transfers heat from the indoor air 350 to the first refrigerant circuit 500.
  • the method may, in certain instances, further include operating a second heat exchanger 320 to transfer heat from a fuel source, the second heat exchanger 320 operatively coupled to a conduit, where the heat exchanger 330 is disposed in the conduit.
  • the method may, in various instances, provide for the circulating of the refrigerant through the first refrigerant circuit 500 and the second refrigerant circuit 400 between an indoor HVAC unit 300 and an outdoor HVAC unit 200.
  • heat is transferred to the first refrigerant circuit 500 in the indoor HVAC unit 300, either from the indoor air 350 circulating through the indoor HVAC unit 300 or from flue gas exhausting through the conduit 360.
  • heat is transferred from the second refrigerant circuit 400 in the indoor HVAC unit 300 to the indoor air 350.
  • the outdoor HVAC unit 200 is capable of taking advantage of heat generated in the indoor HVAC unit 300 to further drive the thermally enhanced heating system 100.
  • the heat being transferred to the first refrigerant circuit 500 in the heat exchanger 330 is a waste heat.
  • the thermally enhanced heating system 100 and method for thermally enhancing an HVAC system captures this waste heat to generate additional heat.
  • the capturing of waste heat to generate additional heat may, in certain instances, increase the efficiency of the thermally enhanced heating system 100.
  • At least a portion of the increased efficiency of the thermally enhanced heating system 100 may be due to reduced electrical consumption by outdoor HVAC unit 200.
  • the refrigerant in the first refrigerant circuit 500 and the second refrigerant circuit 400 includes at least one of: R410A, R32, R452B, R454B, R134a, R515, R513, R1234ze, R1234yf, and R1233zd.
EP20203117.5A 2019-10-28 2020-10-21 Chauffage amélioré thermiquement Pending EP3816534A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US201962926768P 2019-10-28 2019-10-28

Publications (2)

Publication Number Publication Date
EP3816534A2 true EP3816534A2 (fr) 2021-05-05
EP3816534A3 EP3816534A3 (fr) 2021-08-04

Family

ID=73005447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20203117.5A Pending EP3816534A3 (fr) 2019-10-28 2020-10-21 Chauffage amélioré thermiquement

Country Status (2)

Country Link
US (1) US20210123607A1 (fr)
EP (1) EP3816534A3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4301662A (en) * 1980-01-07 1981-11-24 Environ Electronic Laboratories, Inc. Vapor-jet heat pump
US7017357B2 (en) * 2003-11-18 2006-03-28 Carrier Corporation Emergency power generation system
AU2013273913A1 (en) * 2012-06-12 2014-12-18 Endless Solar Corporation Ltd An ejector
US10662966B2 (en) * 2016-12-02 2020-05-26 Trane International Inc. Blower housing labyrinth seal

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Publication number Publication date
EP3816534A3 (fr) 2021-08-04
US20210123607A1 (en) 2021-04-29

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