DE102012018552A1 - Heat exchanger for heat pump system for heating and air-conditioning of building, has Peltier elements or Peltier modules which are arranged for supply of heat to working fluid and for cooling working fluid - Google Patents

Heat exchanger for heat pump system for heating and air-conditioning of building, has Peltier elements or Peltier modules which are arranged for supply of heat to working fluid and for cooling working fluid Download PDF

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Publication number
DE102012018552A1
DE102012018552A1 DE201210018552 DE102012018552A DE102012018552A1 DE 102012018552 A1 DE102012018552 A1 DE 102012018552A1 DE 201210018552 DE201210018552 DE 201210018552 DE 102012018552 A DE102012018552 A DE 102012018552A DE 102012018552 A1 DE102012018552 A1 DE 102012018552A1
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heat
heat exchanger
working fluid
peltier
pump system
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DE201210018552
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German (de)
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Anmelder Gleich
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    • 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
    • F25B30/00—Heat pumps
    • 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
    • F25B21/00—Machines, plants or systems, using electric or magnetic effects
    • F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
    • 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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The heat exchanger has a several Peltier elements or Peltier modules which are arranged in dedicated region between additional heat exchanger and condenser for supply of heat to working fluid and for cooling the working fluid. The electric current is supplied to Peltier elements or Peltier modules such that the heat is transferred to cool the working fluid.

Description

Stand der Technik bestehen Wärmepumpensysteme zur Heizung oder Klimatisierung von Gebäuden oder Räumen aus mindestens einem Verdichter, einem Expansionsventil, einem Verdampfer, einem Verflüssiger und ggf. einem inneren Wärmetauscher zur Erhöhung der Leistungsfähigkeit bei tiefen Außentemperaturen. Der Wirkungsgrad (COP = coefficient of Performance) des Systems hängt neben der Güte der Bauteile (Verdichter, Wärmetauscher) und den relevanten Temperaturen (Außentemperatur, Vorlauftemperatur) auch von der Überhitzung bzw. Unterkühlung des Arbeitsmediums (Kältemittel) ab. Unter praktischen Bedingungen werden typischerweise 25–50% des Carnot-Wirkungsgrads erreicht.The prior art heat pump systems for heating or air conditioning of buildings or rooms from at least one compressor, an expansion valve, an evaporator, a condenser and possibly an internal heat exchanger to increase the performance at low outdoor temperatures. The efficiency (COP = coefficient of performance) of the system depends not only on the quality of the components (compressor, heat exchanger) and the relevant temperatures (outside temperature, flow temperature) but also on the overheating or undercooling of the working medium (refrigerant). Under practical conditions, typically 25-50% of Carnot efficiency is achieved.

Problematisch ist, das häufig eine zu geringe Unterkühlung erreicht wird, da die Temperaturdifferenz des wärmeabführenden Arbeitsmediums (meist Wasser oder Luft) zwischen Vorlauf- und Rücklauf zu gering ist und/oder der Wärmetauscher aus technischen Gründen keine vollständige Nutzung dieser Temperaturdifferenz erlaubt. Dies führt in der Praxis zu schlechteren Wirkungsgraden und erhöht die Betriebskosten.The problem is that often too low subcooling is achieved because the temperature difference of the heat dissipating working medium (usually water or air) between flow and return is too low and / or the heat exchanger for technical reasons does not allow full utilization of this temperature difference. In practice, this leads to poorer efficiencies and increases operating costs.

Dieses Problem wird durch die im Patentanspruch 1 beschriebene Vorrichtung reduziert, die nutzbare Temperaturdifferenz erhöht und dabei zugleich auch die thermische Leistung und der Wirkungsgrad des Gesamtsystems (unter Berücksichtigung der den Peltierelementen zugeführten Energie) erhöht.This problem is reduced by the device described in claim 1, which increases usable temperature difference and at the same time also increases the thermal performance and the efficiency of the overall system (taking into account the energy supplied to the Peltier elements).

Wesentlich für die sinnvolle Applikation der Vorrichtung ist die Verwendung von Peltierelementen beziehungsweise Peltiermodulen mit einem ausreichend hohem Wirkungsgrad bzw. einem geeignetem Betriebspunkt, da der Wirkungsgrad (Verhältnis der vom Peltierelement abgeführten Wärme zur zugeführten elektrischen Energie) vom Stromfluß abhängt. Weiterhin ist es vorteilhaft, die Vorrichtung so zu gestalten, das die inneren Temperaturabfälle möglichst gering sind.Essential for the sensible application of the device is the use of Peltier elements or Peltier modules with a sufficiently high efficiency or a suitable operating point, since the efficiency (ratio of heat dissipated from the Peltier element to the supplied electrical energy) depends on the current flow. Furthermore, it is advantageous to design the device so that the internal temperature drops are as low as possible.

Beim Wechsel der Betriebsart von „Heizen” zu „Kühlen” ist es zweckmäßig, den Strom in den Peltierelementen umzukehren bzw. diese umgekehrt zu montieren.When changing the operating mode from "heating" to "cooling", it is expedient to reverse the current in the Peltier elements or to mount them in reverse order.

Weitere sinnvolle Erweiterungen der Vorrichtung sind in den Patentansprüchen 2–5 dargestellt.Other useful extensions of the device are shown in the claims 2-5.

Eine Prinzipdarstellung ist in Zeichnung 1 aufgezeigt. Die Zeichung 1 zeigt, wo im Kältemittelkreislauf die Vorrichtung nach den Patentansprüchen 1–5 Verwendung finden kann. Ein sinnvolles Ausführungsbeispiel für die im Patentanspruch 1 beschriebene Vorrichtung ist in Zeichnung 2 dargestellt, die konkrete Anzahl oder Ausführung der Peltiermodule und Teile der Vorrichtung sind zweckmäßigerweise für den konkreten Anwendungsfall zu optimieren.A schematic diagram is shown in drawing 1. The drawing 1 shows where in the refrigerant circuit, the device according to claims 1-5 can be used. A useful embodiment of the device described in claim 1 is shown in drawing 2, the concrete number or execution of the Peltier modules and parts of the device are advantageously optimized for the specific application.

Claims (5)

Wärmetauscher für ein Wärmepumpensystem welches mindestens aus einem Kompressor, einem Verflüssiger und einem Verdampfer besteht, dadurch gekennzeichnet, dass (in Fließrichtung des wärmezuführenden Arbeitsmediums) nach dem vorhandenen Verflüssiger ein zusätzlicher Wärmetauscher oder ein dedizierter Bereich des vorhandenen Verflüssiger vorhanden ist, bei dem zwischen dem wärmezuführenden Arbeitsmedium und dem wärmeabführenden Arbeitsmedium ein oder mehrere Peltierelemente beziehungsweise Peltiermodule angeordnet sind, welche durch Zufuhr von elektrischer Energie Wärme transportieren und es somit erlauben, das wärmezuführende Arbeitsmedium mehr abzukühlen als ein Gegenstromwärmetauscher.Heat exchanger for a heat pump system which consists of at least one compressor, a condenser and an evaporator, characterized in that (in the flow direction of the heat-supplying working medium) after the existing condenser, an additional heat exchanger or a dedicated region of the existing condenser is present, in which between the heat-supplying Working medium and the heat-dissipating working medium one or more Peltier elements or Peltier modules are arranged which transport by supplying electrical energy heat and thus allow the heat-carrying working fluid to cool more than a countercurrent heat exchanger. Wärmetauscher nach Patentanspruch 1, dadurch gekennzeichnet, dass der den Peltierelementen zugeführte Strom, für den jeweiligen Betriebspunkt des Wärmepumpensystems optimiert bzw. ggf. umgekehrt wird.Heat exchanger according to claim 1, characterized in that the power supplied to the Peltier elements, for the respective operating point of the heat pump system is optimized or possibly reversed. Wärmetauscher nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass die beschriebene Vorrichtung anstatt des vorhandenen Wärmetauschers installiert wird.Heat exchanger according to claim 1 or 2, characterized in that the device described is installed instead of the existing heat exchanger. Wärmetauscher nach Patentanspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die beschriebene Vorrichtung anstatt oder zusätzlich zum Verdampfer installiert wird.Heat exchanger according to claim 1, 2 or 3, characterized in that the device described is installed instead of or in addition to the evaporator. Wärmetauscher nach Patentanspruch 1, 2 oder 3, dadurch gekennzeichnet, dass im Falle eines Wärmepumpensystems mit einem inneren Wärmetauscher, die beschriebene Vorrichtung anstatt oder zusätzlich zu diesem installiert wird.Heat exchanger according to claim 1, 2 or 3, characterized in that in the case of a heat pump system with an internal heat exchanger, the device described is installed instead of or in addition to this.
DE201210018552 2012-09-20 2012-09-20 Heat exchanger for heat pump system for heating and air-conditioning of building, has Peltier elements or Peltier modules which are arranged for supply of heat to working fluid and for cooling working fluid Withdrawn DE102012018552A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE201210018552 DE102012018552A1 (en) 2012-09-20 2012-09-20 Heat exchanger for heat pump system for heating and air-conditioning of building, has Peltier elements or Peltier modules which are arranged for supply of heat to working fluid and for cooling working fluid

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Application Number Priority Date Filing Date Title
DE201210018552 DE102012018552A1 (en) 2012-09-20 2012-09-20 Heat exchanger for heat pump system for heating and air-conditioning of building, has Peltier elements or Peltier modules which are arranged for supply of heat to working fluid and for cooling working fluid

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DE102012018552A1 true DE102012018552A1 (en) 2014-03-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3184935A1 (en) * 2015-12-23 2017-06-28 Dr. Neumann Peltier-Technik GmbH Cooling device having a peltier element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3184935A1 (en) * 2015-12-23 2017-06-28 Dr. Neumann Peltier-Technik GmbH Cooling device having a peltier element

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R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee