EP2815196A2 - Échangeur de chaleur pour une installation de chauffage ou un système de fourniture de chaleur - Google Patents

Échangeur de chaleur pour une installation de chauffage ou un système de fourniture de chaleur

Info

Publication number
EP2815196A2
EP2815196A2 EP13709038.7A EP13709038A EP2815196A2 EP 2815196 A2 EP2815196 A2 EP 2815196A2 EP 13709038 A EP13709038 A EP 13709038A EP 2815196 A2 EP2815196 A2 EP 2815196A2
Authority
EP
European Patent Office
Prior art keywords
medium
heat exchanger
heat
coil
container
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
EP13709038.7A
Other languages
German (de)
English (en)
Other versions
EP2815196B1 (fr
Inventor
Lubor Chytil
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.)
AZ - Pokorny Trade Sro
Original Assignee
AZ - Pokorny Trade Sro
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 AZ - Pokorny Trade Sro filed Critical AZ - Pokorny Trade Sro
Priority to SI201330171A priority Critical patent/SI2815196T1/sl
Publication of EP2815196A2 publication Critical patent/EP2815196A2/fr
Application granted granted Critical
Publication of EP2815196B1 publication Critical patent/EP2815196B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F28D7/0083—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids with units having particular arrangement relative to a supplementary heat exchange medium, e.g. with interleaved units or with adjacent units arranged in common flow of supplementary heat exchange medium
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag

Definitions

  • the invention relates to a heat exchanger for a heating system or a heat supply system.
  • the various heat sources may be, for example, conventional boilers, thermal solar collectors, geothermal probes, or the like. Heat sinks are commonly used for this task, and heat transfer between the media is achieved by means of separate conduit circuits.
  • the general task for this application is that of incoming heat quantities in the shortest possible time a heated heating medium is generated, which meets the requirements in terms of media temperature and quantity.
  • the above-described objects has to provide a heat exchanger as a central element.
  • a tubular heat exchanger could be considered.
  • Known heat exchangers of this type such as those described in DE 36 41 139 C2, however, are not suitable because of their inertia.
  • the volume ratio can be such that no unnecessary storage volume occurs in such a heat exchanger and, moreover, the separator area is increased by using corrugated pipes, but this type of air-water heat exchanger is not suitable for use as a heat sink in heat supply systems, as it is not designed for operation with two liquid media.
  • the heat exchanger settles within a short period of time and loses considerably in terms of efficiency, throughput and
  • combi storages In some combi storages, a toms consisting of cold water is formed, which permanently disturbs the temperature conditions within the combi cylinder when it sinks. This disadvantageous effect is attempted to be avoided by various manufacturers of such combi storage by the installation of transverse bulkheads and overflow into the combi storage.
  • transverse bulkhead In a known CTC Eco Zeith I 550 CTC AB, 341 26 Ljungby, Sweden, installed in such a combi storage a transverse bulkhead, which is provided in each case with a multi-hole overflow channel both in the upper and in the lower area.
  • Heat exchanger is a tube heat exchanger having at least one tube coil disposed in a container and outwardly directed connections for the tube coil and the container interior.
  • Coil - is a helical and / or spiral wound pipe whose pitch may be uniform or different in different areas.
  • Pipe is a metallic tube with a profiled wall, preferably a corrugated tube with a parallel or a helical corrugation.
  • Separator- is a solid and liquid impermeable partition between different media. It is formed by the pipe wall.
  • Medium- is a fluid that can contain and transport heat.
  • First medium - is a fluid that can be heated by any heat sources and transfers these heat quantities in a heat exchanger to a second medium.
  • Second Medium- is a fluid that takes in a heat exchanger from the first medium quantities of heat and transports them to existing consumers in the system or storage units.
  • the object is achieved with a heat exchanger in the design of a tubular heat exchanger. This is designed so that its container volume is filled with the first medium and a second medium flows through a likewise arranged in the container tube coil.
  • the heat exchanger achieves a conversion efficiency of at least 90 percent, based on the quantities of heat supplied with the first medium and the quantities of heat removed with the second medium, under the temperature conditions existing in heat supply systems.
  • the heat exchanger has at least the following parameters:
  • the aim is a ratio of the volumes of the container and the volume of the coil, which is at a value of 5 or less.
  • the container of the heat exchanger is very thermally insulated.
  • the coil is made of a metallic material.
  • the wall thickness of the tube of the coil is very low.
  • the coil is movable to a limited extent in the container.
  • the container shape is chosen so that a small surface of the container is present.
  • a tube coil which consists of a thin-walled corrugated tube.
  • Such type corrugated pipes have wall thicknesses in the range of a few tenths of a millimeter. The pipe wall thus forms an extremely thin separator, through which an intensive heat transfer can be achieved.
  • stainless steel corrugated pipes are used for the coil.
  • the reduced heat transfer in stainless steels is compensated by the small wall thickness.
  • the helically wound coil of a corrugated tube causes the transition to a turbulent flow even at a comparatively low flow velocity, whereby the exchange process is intensified to a considerable extent.
  • the coil can move in the container to a limited extent, for example as a result of thermal expansion. As a result, and due to the predominantly turbulent flows, no deposits can form in the area of the separator.
  • the container of the heat exchanger preferably has a cylindrical shape. Its length can be up to 6 times the diameter.
  • the comparatively small container volume causes the first medium to be constantly fed again and therefore also has a high flow velocity in the container.
  • a largely turbulent flow also occurs on this side of the separator and the exchange process is additionally intensified.
  • the measures described above prevent a layering of the first medium after the temperature inside the container. This largely prevents tori in the first and temperature fluctuations in the second medium.
  • the heat exchanger according to the invention can thus with a comparatively small volume of about 60 I, an inlet temperature of the first medium of about 90 ° C, a flow rate of the first and second medium of about 3000 l / h and a temperature gradient of about 40 ° C reach a specific power of 750 W per 100 cm 2 separator area.
  • the performance parameters of the heat exchangers according to the invention reach those of plate heat exchangers.
  • the heat exchanger according to the invention in such a way that the tube coil is fanned in the container interior to form a multiple arrangement.
  • the volume ratios between the first and second medium in the heat exchanger in favor of the second medium can be influenced.
  • the plurality of pipe coils can either be guided with their individual ports to the outside and connected outside the container or branched within the container.
  • one of the tube coils can also be connected to a further heat source.
  • one of the coils may be connected to a circuit of a heat supply system which requires a different temperature level.
  • a preferred embodiment is that at least one second tube coil serves to connect a third medium from a heat source or from a heat consumer to the heat exchanger, if the third medium may not be mixed with the first or the second medium due to special properties.
  • a heat supply system in which the heat exchanger according to the invention may be provided with a coil for the service water supply, so that the provision of hot water can be made possible in this way.
  • a heat supply system in which the heat exchanger according to the invention may be provided with an electrically operated heating cartridge, which can take over either a supply of heat or only the assurance of frost protection.
  • the surface serving for heat exchange increases, hence the so-called separator surface. Furthermore, the second medium to be heated in the coil undergoes a turbulent flow through the profiled wall, which intensifies the heat exchange.
  • the heat exchanger is designed so that it has the lowest possible inertia in the heat transfer based on the heat demand in the heating circuit.
  • the heat exchanger is designed to have a conversion efficiency of at least 90 percent.
  • FIG. 1- A schematic representation of the heat exchanger according to the invention.
  • Fig. 2- An embodiment of the heat exchanger according to the invention, in which all the coils are connected in parallel.
  • FIG. 3- An embodiment of the heat exchanger according to the invention, in which all the coils are connected in parallel within the heat exchanger.
  • the heat exchanger 1 consists at least of a container 2, an insulation 3 surrounding the container 2 and a tube coil 4. Contrary to the embodiment known from the prior art heat exchanger for heating systems or heat supply systems provided by heat generators heated first medium in the interior 7 of the container 2 is present and a heat consumer supplying second medium, which is heated by exchange processes, flows through the coil 4.
  • the coil 4 is connected with its guided outward terminals 5 and 6 with a line circuit in which there are heat consumers.
  • the first medium In the interior 7 of the container 2 is the first medium, wherein the container 2 is connected via the terminals 8 and 9 with the first line circuit, are arranged in the heat generator.
  • Heat generators can be thermal solar collectors, heat pumps, boilers, geothermal probes or facilities that recover process heat.
  • a second tube coil 10 and a third coil 11 may be arranged, which may also be connected with their terminals 12 and 13 and 14 and 15 with heat consumers.
  • the coils 4, 10 and 11 may be connected to one and the same circuit. You can also feed different circuits with a heated medium.
  • Such an arrangement has the following advantages when a heat exchanger 1 having a volume of 60 l is used:
  • the ratio between the first medium in the interior 7 of the container 2 and the second medium in the coil 4 moves between 1: 2 to 1 : 4th
  • the transfer performance of the separator / separator wall is 125 W / 100 cm 2 .
  • the heat exchanger 1 has a capacity of 470 l / h, an inlet temperature of 50 ° C and an outlet temperature of 10 ° C, a power of about 23 kW.
  • the specific power of the separator may then be 150 W / 100 cm 2 .
  • the heat exchanger 1 achieved after heating properties that correspond to those of a plate heat exchanger. Only during the heating cycle is the inertia resulting from the volume flows at the inlet and outlet of the heat exchanger 1 present.
  • a volume of about 500 l of heated second medium at a temperature of 50 ° C can be removed under the same conditions for an arbitrarily long time.
  • the heat exchanger 1 has a calculated peak power of 120 kW, based on a flow rate of 3000 l / h.
  • the heat exchanger 1 has a specific power of 750 W / 100 cm 2 at an increased flow of 3000 l / h, with an inlet temperature of 90 ° C, a starting temperature of 50 ° C at the separator / separator wall.
  • the transmitted power is directly proportional to the area of the separator, thus to the area of the corrugated pipe used and ultimately also to the number of corrugated pipe coils.
  • the transmitted power is directly proportional to the volume flow on the primary and the secondary side and to the temperature gradient At.
  • the coil 4 is made of a stainless steel corrugated pipe.
  • the stainless steel corrugated tube is profiled in parallel or helical.
  • the wall thickness of the stainless steel corrugated pipe is between 0.1 mm and 0.5 mm.
  • the coil 4 is suspended in the interior space 7 of the container 2 movable. It may expand due to temperature changes and / or change shape slightly.
  • the flow in the coil is turbulent even at low flow velocities through the use of corrugated tubes, thus ensuring an intensive exchange process.
  • the volume ratios and the geometric design of the coil 4 are chosen so that in the interior 7 of the container 2, a turbulent flow prevails and thus the exchange process takes place on both sides of the separator equally intense.
  • the effectively conducted exchange process also causes a target temperature of 50 ° C in the second medium to be reached in one-tenth of the time required by a combi store known in the art.
  • the extremely low inertia of the heat exchanger 1 is achieved in addition to the measures already mentioned above, characterized in that the separator surface realized with the coil 4 has a value between 150 cm 2 - 700 cm 2 per liter of container volume.
  • the coils 4, 10 and 11 may be designed as helical coils, as helical coils or as a combination of both forms. Special embodiments of the heat exchanger 1 according to the invention can result from the fact that the coils 4, 10 and 11 are connected to a connection 16 outside the insulation 3. It is also possible to carry out the connection 16 only between two of the existing coils 4, 10 and 11, while the remaining coil is assigned to a separate line circuit. This is, for example, the preferred variant if, in addition to the heating or heat supply system, a process water treatment must take place.
  • the interconnection of the coils 4, 10 and 11 may also be performed in the interior 7 of the container 2 with a connection 17.
  • the interconnection is carried out in the area enclosed by the insulation 3 and there are only the terminals of the coil 4 out through the insulation to the outside. This creates an effective heat exchanger with a large separator surface.
  • such a heat exchanger forms the possibility of designing various embodiments in the manner of a modular system and thus of adapting it to specific conditions of use.
  • the arrangement described above can be carried out by known means as a standing or as a hanging arrangement or as a combination of both possibilities
  • the insulation 3 of the heat exchanger 1 can be designed according to the criteria of optimal energy utilization. It may further include conduits, valves and circulation pumps. Likewise, it can be designed removable.
  • the invention thus has the advantage that it proposes heat exchangers for heating or heat supply systems that work efficiently, whose dimensions are small, which provide heated with low inertia media and can otherwise be produced inexpensively and with low material and manufacturing costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

L'invention concerne un échangeur de chaleur pour une installation de chauffage ou un système de fourniture de chaleur sous la forme d'un échangeur de chaleur à tubes comprenant une enceinte fermée, l'espace intérieur étant rempli d'un premier fluide qui amène des quantités de chaleur et un second fluide qui évacue des quantités de chaleur se trouvant dans le serpentin de ladite enceinte. L'invention concerne également un mode de réalisation de tels échangeurs de chaleur avec un faible encombrement et un haut rendement ainsi qu'une puissance spécifique élevée.
EP13709038.7A 2012-02-17 2013-02-15 Échangeur de chaleur pour une installation de chauffage ou un système de fourniture de chaleur Active EP2815196B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201330171A SI2815196T1 (sl) 2012-02-17 2013-02-15 Izmenjevalnik toplote za ogrevalni sistem ali za sistem za dovod toplote

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012101276A DE102012101276A1 (de) 2012-02-17 2012-02-17 Wärmetauscher für eine Heizungsanlage oder ein Wärmeversorgungssystem
PCT/EP2013/000450 WO2013120621A2 (fr) 2012-02-17 2013-02-15 Échangeur de chaleur pour une installation de chauffage ou un système de fourniture de chaleur

Publications (2)

Publication Number Publication Date
EP2815196A2 true EP2815196A2 (fr) 2014-12-24
EP2815196B1 EP2815196B1 (fr) 2016-04-06

Family

ID=47877983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13709038.7A Active EP2815196B1 (fr) 2012-02-17 2013-02-15 Échangeur de chaleur pour une installation de chauffage ou un système de fourniture de chaleur

Country Status (9)

Country Link
EP (1) EP2815196B1 (fr)
DE (1) DE102012101276A1 (fr)
DK (1) DK2815196T3 (fr)
EA (1) EA026850B1 (fr)
ES (1) ES2579833T3 (fr)
HU (1) HUE029432T2 (fr)
PL (1) PL2815196T3 (fr)
SI (1) SI2815196T1 (fr)
WO (1) WO2013120621A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2683059C1 (ru) * 2018-05-23 2019-03-26 Глеб Иванович Ажнов Способ извлечения и использования геотермального тепла для охлаждения грунтов вокруг тоннелей метрополитена
RU208959U1 (ru) * 2021-07-09 2022-01-24 Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) Кожухотрубный теплообменник
DE102021134317A1 (de) 2021-12-22 2023-06-22 cupasol GmbH Fernwärmeübergabestation und verfahren zum betreiben derselben

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2003579A (en) * 1932-08-15 1935-06-04 Holyoke Heater Company Heater
DE3519315A1 (de) * 1985-05-30 1986-12-04 kabelmetal electro GmbH, 3000 Hannover Waermetauscher aus einem huellrohr und einem im innern des huellrohres angeordneten wendelartig verlaufenden rohr
DE3641139A1 (de) * 1985-12-06 1987-06-11 Vaillant Joh Gmbh & Co Indirekt beheizter heisswassererzeuger und -speicher
DE4240180A1 (de) * 1992-11-30 1994-06-01 Fritz Egger Gmbh Wärmetauscher und Verfahren zu seinem Betreiben
CN101233378B (zh) * 2005-07-29 2010-08-04 林德股份公司 具有不同管径的缠绕式换热器
US20110289905A1 (en) * 2010-06-01 2011-12-01 Delphi Technologies, Inc. Exhaust gas heat recovery heat exchanger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013120621A2 *

Also Published As

Publication number Publication date
DK2815196T3 (en) 2016-07-25
WO2013120621A3 (fr) 2013-11-21
PL2815196T3 (pl) 2016-10-31
DE102012101276A1 (de) 2013-08-22
EA026850B1 (ru) 2017-05-31
HUE029432T2 (en) 2017-02-28
SI2815196T1 (sl) 2016-05-31
EP2815196B1 (fr) 2016-04-06
EA201400923A1 (ru) 2014-11-28
ES2579833T3 (es) 2016-08-17
WO2013120621A2 (fr) 2013-08-22

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