WO1989000664A1 - Tubular heat exchanger incorporating three coaxial tubes and connected to a storage tank for heated water - Google Patents

Tubular heat exchanger incorporating three coaxial tubes and connected to a storage tank for heated water Download PDF

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Publication number
WO1989000664A1
WO1989000664A1 PCT/SE1988/000368 SE8800368W WO8900664A1 WO 1989000664 A1 WO1989000664 A1 WO 1989000664A1 SE 8800368 W SE8800368 W SE 8800368W WO 8900664 A1 WO8900664 A1 WO 8900664A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
channel
heat exchanger
heat
hot
Prior art date
Application number
PCT/SE1988/000368
Other languages
French (fr)
Inventor
Sigurd Hultgren
Original Assignee
Sigurd Hultgren
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 Sigurd Hultgren filed Critical Sigurd Hultgren
Publication of WO1989000664A1 publication Critical patent/WO1989000664A1/en

Links

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
    • F24D10/00—District heating systems
    • F24D10/003—Domestic delivery stations having a heat exchanger
    • 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]
    • Y02B30/17—District heating
    • 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
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]

Definitions

  • Tubular heat exchanger incorporating three coaxial tubes and connected to a storage tank for heated water
  • the present invention relates to an arrangement for supply ⁇ ing hot water to small dwellings and the like connected to a district or municipal heating network, for heating and consumer purposes, the arrangement comprising a heat exchanger, a radiator circuit, a hot water tap-off point, a cold water inlet, and a water heater.
  • the term implies, when direct heat exchangers are used energy is transferred directly from the heat emitting side, i.e. normally from the district heating side, to the heat •receiving side, normally a radiator side or hot water side, or a combination of these two, e.g. through a so-called three-stage coupling. This involves heating the radiator water and the hot water in two separate units and passing the district hot water exiting from the radiator exchanger into a final stage in the hot water exchanger and then cooling the water directly with the incoming cold water.
  • the arrangement in gene- ⁇ I will comprise one or more heat exchangers and separate storage facilities or parts for the radiator circuit and the hot-water tap-off point. These storage parts are nor ⁇ mally combined to form a unit in a vessel which incorpora ⁇ tes three mutually separated water chambers, one chamber for district hot water, one chamber for radiator water and one chamber for consumer hot water.
  • the district hot-water supply can then be connected to one or more stages for the transfer of thermal energy to the radiator water and to the consumer hot water, or optionally to other fluids.
  • the through-flow of district hot water can be controlled rela ⁇ tively easily with the aid of a valve, preferably a so-cal ⁇ led thermostat valve which comprises a valve unit and a control unit or thermostat.
  • valve unit Normally, the valve unit is placed on the district hot-water inlet side and the thermo ⁇ stat on the return side.
  • the valve and the thermostat are interconnected by means of a control line or pipe, such that the valve will open and close when the return water is at the temperature desired.
  • the return line may comprise, a liquid-filled capillary containing capillary liquid whose volume changes with temperature, thereby opening or closing the valve.
  • Such a control unit is relatively small in size and also inexpensive.
  • thermoenergy of the district hot water is normally transferred to the radiator water and a part of this energy is then used to heat the storage water in the water heater.
  • the water heater is nor ⁇ mally dimensioned to accommodate at least the amount of water required when taking a normal bath, and may have a significant volumetric capacity.
  • One drawback with storage heat exchangers is that when a large quantity of hot water is tapped-off, it takes a relatively long time to heat the water subsequently entering the water heater to the correct temperature.
  • a storage heat exchanger is both large and relatively heavy, and conse- quently it requires the assistance of several persons to lift and carry the water heater into the building in which said heater is to be installed.
  • a storage heat exchanger will afford a fairly efficient heat buffer for both radiator water and consumer hot water. Consequently, the actual heat exchanger need not be dimensioned for the maximum load which can be expected to occur when large quantities of consumer hot water are tapped-off, which means that the culvert side can be made smaller, which in turn favourably influences the costs entailed by the culvert and other items of plant equipment in the district heating plant.
  • the culvert side can be made smaller, which in turn favourably influences the costs entailed by the culvert and other items of plant equipment in the district heating plant.
  • the object of the present invention is to provide an arrangement of the kind described in the introduction which will combine the advantages afforded with the use of direct heat exchangers and storage heat exchangers while avoiding the drawbacks previously encountered when using such exchangers.
  • this object is achieved with an arrangement having the features set forth in the following Claim 1. Because solely the storage function is active when large quantities of hot water are tapped-off, the arrangement will operate under direct heat-exchange conditions in normal operation. The ' weight of the water heater is less than half the wei'ght of earlier storage heat-exchangers and, despite the water heater, the arrange ⁇ ment will not be greater than a conventional arrangement. incorporating direct heat exchangers, due to the fact that the peripheral equipment of the arrangement is relatively small in comparison with a conventional direct heat- exchange arrangement.
  • the units can be con ⁇ structed for power outputs of about and in excess of 100 kW without becoming heavy and bulky, and the smallest units can be readily carried into a building by two men.
  • the connections can be made readily, for both top and bottom fittings.
  • the arrangement illustrated in Fig. 1 includes a three-pipe heat exchanger 2 which comprises three mutually coaxial thin pipes 2.1, 2.2, 2.3, which are preferably made of copper.
  • a three-pipe heat exchanger 2 which comprises three mutually coaxial thin pipes 2.1, 2.2, 2.3, which are preferably made of copper.
  • the outer annular channel 17 of the heat exchanger 2 is connected to the district hot- water network and, as indicated by arrows in the Figure, water will flow from said network through the pipe J . and, via a dirt filter 21, through the valve 19 and into the channel 17 such as to enter the right-hand end of the heat exchanger as seen in the Figure.
  • the district hot water flows out through the left- hand end of the heat exchanger, as seen in the Figure, and into the return pipe 3.
  • the flow in the channel 17 is controlled by the valve 19, through a thermostat 20 located in the return pipe 3, which is connected to the control valve through the capillary pipe- 37.
  • the annular channel 18 in the heat exchanger 2 is connected to the radiator cir ⁇ cuit 1 in the dwelling house to be heated. Only one radia- tor has been shown in the schematic illustration of said Figure.
  • return water flows from the radiators t through the pipe 6 and in the channel 18 in the left-hand end of the heat exchanger shown in the Figure, and flows in counterflow to the district hot water through said channel and out through the pipe 5.
  • a circulation pump 23 incorpo ⁇ rating closure valves controls the circulation of water in the closed radiator circuit.
  • This circuit also includes a so-called bypass pipe 24 which, via a shunt valve 22, con ⁇ ducts incoming radiator water to the return pipe 6 for mix ⁇ ture with the outgoing radiator water so as to obtain the correct temperature, when required.
  • the shunt 22 may optio ⁇ nally be controlled automatically by thermostats, an exter ⁇ nal and an internal thermostat.
  • a pipe 16 extends from the opposite end of the channel O down into a water heater 10.
  • a pipe 7 extends from the upper end of the water heater 10 to a hot water tap-off point in the dwelling house.
  • the hot water pipe 7 is connected with the cold water pipe 8 through a mixer valve 26 and a branch pipe, so as to enable the hot water to mix with cold water when a hot-water temperature previously set on the mixer valve is exceeded.
  • the arrangement also includes a heat holding circuit which keeps the water in the heater 10 warm during those periods in which no hot water is tapped off.
  • This circuit includes a circulation pump 11 which pumps hot water from a pump 13
  • the arrangement also includes an expansion system 27 which is intended to maintain the system pressure, i.e. the radiator pressure, at a preset value of around 1.5 atm.
  • This system includes a manometer 29, a deaerating device 30, a safety valve 31 and an expan ⁇ sion vessel 32.
  • the expansion vessel is of the closed kind having a rubber diaphragm which separates the radiator water from an air-filled chamber.
  • the heat exchanger 2 illustrated schematically in the Figu ⁇ re has a semi-circular configuration.
  • a heat exchanger which surrounds or encircles the water heater 10 is preferred.
  • the heat exchanger may comprise one or more parallel-connected three-pipe loops with paral ⁇ lel-connected channels, as indicated by the reference 12 in the left-hand part of the Figure.
  • At least the heat exchan ⁇ ger 2 and the water heater 10 are housed in a cabinet 34 and insulated with polyurethane 35.
  • the district hot water is connected to the channel 17. It will be understood, however, that the district hot water may, instead, be connected to the annular channel 18, and it is also conceivable to connect said water to the inner channel 40 without departing from the spirit of the invent ⁇ ion. It is preferred, however, to supply the cold water to the inner channel 40.

Abstract

The present invention relates to an arrangement for supplying hot water to smaller dwelling houses and the like connected to a district hot-water network, for heating and consumer purposes. The arrangement includes a heat exchanger (2), a radiator circuit (1), a hot-water tap-off point (7), a cold water inlet (8) and a water heater (10). In accordance with the invention, the heat exchanger comprises at least one three-pipe heat exchanger (2), the pipes (2.1, 2.2, 2.3) of which define an inner tubular channel (40) and two annular channels (17, 18) which extend coaxially with the inner channel, of which channels a first channel is connected to the radiator circuit (1) so as to form a closed circuit, a second channel is connected to the district hot-water network, and a third channel, whose inlet is connected to the cold water inlet (8), is connected to the hot water tap-off point (7) via the water heater (10).

Description

Tubular heat exchanger incorporating three coaxial tubes and connected to a storage tank for heated water
The present invention relates to an arrangement for supply¬ ing hot water to small dwellings and the like connected to a district or municipal heating network, for heating and consumer purposes, the arrangement comprising a heat exchanger, a radiator circuit, a hot water tap-off point, a cold water inlet, and a water heater.
At present, arrangements of this kind utilize two different methods of heat transfer, using therefor so-called direct heat exchangers and storage heat exchangers.
Λs the term implies, when direct heat exchangers are used energy is transferred directly from the heat emitting side, i.e. normally from the district heating side, to the heat •receiving side, normally a radiator side or hot water side, or a combination of these two, e.g. through a so-called three-stage coupling. This involves heating the radiator water and the hot water in two separate units and passing the district hot water exiting from the radiator exchanger into a final stage in the hot water exchanger and then cooling the water directly with the incoming cold water.
Consequently, when using direct heat exchangers it is necessary to dimension the exchangers for the maximum load that can occur, although the actual heat exchanger itself can, nevertheless, be relatively small. However, the con¬ trol of arrangements of this kind is relatively complicated and the control units required are both large and bulky, as are also the system fittings, a least to some extent. The control components are nlr.o relatively expensive.
When using storage heat exchangers the arrangement in gene- Γ I will comprise one or more heat exchangers and separate storage facilities or parts for the radiator circuit and the hot-water tap-off point. These storage parts are nor¬ mally combined to form a unit in a vessel which incorpora¬ tes three mutually separated water chambers, one chamber for district hot water, one chamber for radiator water and one chamber for consumer hot water. The district hot-water supply can then be connected to one or more stages for the transfer of thermal energy to the radiator water and to the consumer hot water, or optionally to other fluids. The through-flow of district hot water can be controlled rela¬ tively easily with the aid of a valve, preferably a so-cal¬ led thermostat valve which comprises a valve unit and a control unit or thermostat. Normally, the valve unit is placed on the district hot-water inlet side and the thermo¬ stat on the return side. The valve and the thermostat are interconnected by means of a control line or pipe, such that the valve will open and close when the return water is at the temperature desired. The return line may comprise, a liquid-filled capillary containing capillary liquid whose volume changes with temperature, thereby opening or closing the valve. Such a control unit is relatively small in size and also inexpensive.
When using storage heat exchangers, the thermoenergy of the district hot water is normally transferred to the radiator water and a part of this energy is then used to heat the storage water in the water heater. The water heater is nor¬ mally dimensioned to accommodate at least the amount of water required when taking a normal bath, and may have a significant volumetric capacity. One drawback with storage heat exchangers, however, is that when a large quantity of hot water is tapped-off, it takes a relatively long time to heat the water subsequently entering the water heater to the correct temperature. Furthermore, a storage heat exchanger is both large and relatively heavy, and conse- quently it requires the assistance of several persons to lift and carry the water heater into the building in which said heater is to be installed.
However, a storage heat exchanger will afford a fairly efficient heat buffer for both radiator water and consumer hot water. Consequently, the actual heat exchanger need not be dimensioned for the maximum load which can be expected to occur when large quantities of consumer hot water are tapped-off, which means that the culvert side can be made smaller, which in turn favourably influences the costs entailed by the culvert and other items of plant equipment in the district heating plant. As a result of its dimen¬ sions, it is not possible in practice to use storage heat exchangers in situations where high power outputs are required, i.e. in buildings which incorporate a large number of apartments or flats, and it is believed that such exchan βra cannot be used efficiently in buildings which incorporate more than 6-10 apartments.
The object of the present invention is to provide an arrangement of the kind described in the introduction which will combine the advantages afforded with the use of direct heat exchangers and storage heat exchangers while avoiding the drawbacks previously encountered when using such exchangers.
In accordance with the invention this object is achieved with an arrangement having the features set forth in the following Claim 1. Because solely the storage function is active when large quantities of hot water are tapped-off, the arrangement will operate under direct heat-exchange conditions in normal operation. The 'weight of the water heater is less than half the wei'ght of earlier storage heat-exchangers and, despite the water heater, the arrange¬ ment will not be greater than a conventional arrangement. incorporating direct heat exchangers, due to the fact that the peripheral equipment of the arrangement is relatively small in comparison with a conventional direct heat- exchange arrangement. Furthermore, the units can be con¬ structed for power outputs of about and in excess of 100 kW without becoming heavy and bulky, and the smallest units can be readily carried into a building by two men. The connections can be made readily, for both top and bottom fittings.
The invention will now be described in more detail with reference to the accompanying drawing, which illustrates schematically an embodiment of an inventive arrangement.
The arrangement illustrated in Fig. 1 includes a three-pipe heat exchanger 2 which comprises three mutually coaxial thin pipes 2.1, 2.2, 2.3, which are preferably made of copper. In this way, there is formed an inner channel MO, an intermediate annular channel 18 and an outer annular channel 17 (see the enlarged detail view of a cross-section through the heat exchanger). The outer annular channel 17 of the heat exchanger 2 is connected to the district hot- water network and, as indicated by arrows in the Figure, water will flow from said network through the pipe J. and, via a dirt filter 21, through the valve 19 and into the channel 17 such as to enter the right-hand end of the heat exchanger as seen in the Figure. Subsequent to having passed through the channel 17 while giving off part of its heat, the district hot water flows out through the left- hand end of the heat exchanger, as seen in the Figure, and into the return pipe 3. The flow in the channel 17 is controlled by the valve 19, through a thermostat 20 located in the return pipe 3, which is connected to the control valve through the capillary pipe- 37. The annular channel 18 in the heat exchanger 2 is connected to the radiator cir¬ cuit 1 in the dwelling house to be heated. Only one radia- tor has been shown in the schematic illustration of said Figure. In this case, return water flows from the radiators t through the pipe 6 and in the channel 18 in the left-hand end of the heat exchanger shown in the Figure, and flows in counterflow to the district hot water through said channel and out through the pipe 5. A circulation pump 23 incorpo¬ rating closure valves controls the circulation of water in the closed radiator circuit. This circuit also includes a so-called bypass pipe 24 which, via a shunt valve 22, con¬ ducts incoming radiator water to the return pipe 6 for mix¬ ture with the outgoing radiator water so as to obtain the correct temperature, when required. The shunt 22 may optio¬ nally be controlled automatically by thermostats, an exter¬ nal and an internal thermostat.
Cold water enters the channel 'JO in the left-hand part of the heat exchanger 2 from a pipe 8. A pipe 16 extends from the opposite end of the channel O down into a water heater 10. A pipe 7 extends from the upper end of the water heater 10 to a hot water tap-off point in the dwelling house. The hot water pipe 7 is connected with the cold water pipe 8 through a mixer valve 26 and a branch pipe, so as to enable the hot water to mix with cold water when a hot-water temperature previously set on the mixer valve is exceeded.
The arrangement also includes a heat holding circuit which keeps the water in the heater 10 warm during those periods in which no hot water is tapped off. This circuit includes a circulation pump 11 which pumps hot water from a pump 13
^ opening into the upper part of the water heater 10 through a pipe 1U which is connected to the inlet end of the
Ϊ channel 40 'via a non-return valve 15. Thus, during static periods hot water will flow from the water heater 10 through the pipe 14 and into the channel '10 in the heat exchanger, in which the water is heated and then returned through the pipe 16 to the bottom part of the water heater. The radiator water is replenished with the aid of a reple¬ nishing valve 28 which is effective in filling the system through the pipe 33. The arrangement also includes an expansion system 27 which is intended to maintain the system pressure, i.e. the radiator pressure, at a preset value of around 1.5 atm. This system includes a manometer 29, a deaerating device 30, a safety valve 31 and an expan¬ sion vessel 32. The expansion vessel is of the closed kind having a rubber diaphragm which separates the radiator water from an air-filled chamber.
The heat exchanger 2 illustrated schematically in the Figu¬ re has a semi-circular configuration. In practice, a heat exchanger which surrounds or encircles the water heater 10 is preferred. Furthermore, the heat exchanger may comprise one or more parallel-connected three-pipe loops with paral¬ lel-connected channels, as indicated by the reference 12 in the left-hand part of the Figure. At least the heat exchan¬ ger 2 and the water heater 10 are housed in a cabinet 34 and insulated with polyurethane 35.
In the case of the described and illustrated arrangement, the district hot water is connected to the channel 17. It will be understood, however, that the district hot water may, instead, be connected to the annular channel 18, and it is also conceivable to connect said water to the inner channel 40 without departing from the spirit of the invent¬ ion. It is preferred, however, to supply the cold water to the inner channel 40.

Claims

1. An arrangement for supplying hot water to smaller dwell¬ ing houses and the like connected to a district hot-water network for heating and consumer purposes, said arrangement including a heat exchanger (2), a radiator circuit (1), a hot water tap-off point (7), a cold water inlet (8), and a water heater (10), characterized in that the heat exchanger comprises at least one three-pipe heat exchanger (2) the pipes of which (2.1, 2.2, 2.3) define an inner tubular channel (40) and two annular channels (17, 18) which extend coaxially with the inner channel, of which channels a first channel is connected to the radiator circuit (1) so as to form a closed circuit, a second channel is connected to the district hot-water network, and a third channel whose inlet is connected to the cold water inlet (8) is connected to the hot water tap-off point (7) via the water heater (10); and in that the arrangement further comprises a heat holding circuit (13, 11, 14, 6, ^0, 16) which during periods in which no hot water is tapped from the water heater (10) form a closed circuit in which the water in the water heater is caused to circulate, by means of a pump (11) through the channel (40) connected to the water heater and incorporated in the heat exchanger (2) and back to the water heater.
2. An arrangement according to Claim 1, characterized in that the heat holding circuit incorporates a non-return valve (15) which prevents cold water from flowing into the heat holding circuit when hot water is drawn from the water heater.
3. An arrangement according to any of Claims 1-?, charac¬ terized in that the arrangement includes several three-pipe- heat exhangers (2), the channels of which are connected in parallel.
4. An arrangement according to any of Claims 1-3, characte¬ rized in that the heat exchanger or heat exchangers (2). is/are configures to embrace the water heater (10) around its largest diameter.
5. An arrangement according to any of Claims 1-4, charac¬ terized in that the district hot water flows in the heat exchanger (2) or heat exchangers in a direction opposite to the water in the radiator circuit and water-heater circuit.
6. An arrangement according to any of the preceding Claims, characterized in that the cold water flows through the inner tubular channel (40) and the radiator water flows in the outer annular channel (17).
7. An arrangement according to any of Claims 1-5, charac¬ terized in that the district hot water in the heat exchang¬ er (2) or heat exchangers passes through the outer annular channel (17).
PCT/SE1988/000368 1987-07-17 1988-07-05 Tubular heat exchanger incorporating three coaxial tubes and connected to a storage tank for heated water WO1989000664A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8702897-3 1987-07-17
SE8702897A SE460223B (en) 1987-07-17 1987-07-17 TRIPLE STEERING HEAT EXCHANGER WITH THIS CONNECTED FRAMEWORK VOLUME FOR THE HOT WATER CONNECTED TO THE SPRING HEATER

Publications (1)

Publication Number Publication Date
WO1989000664A1 true WO1989000664A1 (en) 1989-01-26

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ID=20369148

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1988/000368 WO1989000664A1 (en) 1987-07-17 1988-07-05 Tubular heat exchanger incorporating three coaxial tubes and connected to a storage tank for heated water

Country Status (2)

Country Link
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WO (1) WO1989000664A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2250580A (en) * 1990-12-05 1992-06-10 Imi Range Ltd Waterheating system
EP0924478A2 (en) * 1997-12-15 1999-06-23 Carrier Corporation Refrigeration system with integrated oil cooling heat exchanger
WO2017212201A1 (en) 2016-06-10 2017-12-14 Hutchinson Method for heat exchange and conditioning of a heat exchanger
WO2017212198A1 (en) 2016-06-10 2017-12-14 Hutchinson Heat exchanger-accumulator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE157933C (en) *
SE409361B (en) * 1977-12-09 1979-08-13 Aga Ctc Vaermevaexlare Ab WATER HEATER
DE2826177A1 (en) * 1978-06-15 1979-12-20 Baelz Gmbh Helmut Multiple supply hot water system - has main tank with inner section, to use main supply to preheat second supply
FI60611B (en) * 1978-05-02 1981-10-30 Yrjoe Valter Lindstroem ANORDING FOR THE CONSTRUCTION OF THE BRUSSELS VID EN VAERMEPUMPANLAEGGNING FOER UPPVAERMNING AV BYGGNADER
US4524909A (en) * 1982-11-15 1985-06-25 Ingemar Persson Apparatus for production of hot tap water

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE157933C (en) *
SE409361B (en) * 1977-12-09 1979-08-13 Aga Ctc Vaermevaexlare Ab WATER HEATER
FI60611B (en) * 1978-05-02 1981-10-30 Yrjoe Valter Lindstroem ANORDING FOR THE CONSTRUCTION OF THE BRUSSELS VID EN VAERMEPUMPANLAEGGNING FOER UPPVAERMNING AV BYGGNADER
DE2826177A1 (en) * 1978-06-15 1979-12-20 Baelz Gmbh Helmut Multiple supply hot water system - has main tank with inner section, to use main supply to preheat second supply
US4524909A (en) * 1982-11-15 1985-06-25 Ingemar Persson Apparatus for production of hot tap water

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2250580A (en) * 1990-12-05 1992-06-10 Imi Range Ltd Waterheating system
GB2250580B (en) * 1990-12-05 1994-09-07 Imi Range Ltd Waterheating system
EP0924478A2 (en) * 1997-12-15 1999-06-23 Carrier Corporation Refrigeration system with integrated oil cooling heat exchanger
EP0924478A3 (en) * 1997-12-15 2000-03-22 Carrier Corporation Refrigeration system with integrated oil cooling heat exchanger
WO2017212201A1 (en) 2016-06-10 2017-12-14 Hutchinson Method for heat exchange and conditioning of a heat exchanger
WO2017212198A1 (en) 2016-06-10 2017-12-14 Hutchinson Heat exchanger-accumulator
US11067342B2 (en) 2016-06-10 2021-07-20 Hutchinson Method for heat exchange and conditioning of a heat exchanger
US11326839B2 (en) 2016-06-10 2022-05-10 Hutchinson Thermal exchanger-accumulator

Also Published As

Publication number Publication date
SE460223B (en) 1989-09-18
SE8702897D0 (en) 1987-07-17
SE8702897L (en) 1989-01-18

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