DE3206707A1 - Control method for matching the heating heat supply of absorption heat pumps with fixed throttles - Google Patents

Control method for matching the heating heat supply of absorption heat pumps with fixed throttles

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Publication number
DE3206707A1
DE3206707A1 DE19823206707 DE3206707A DE3206707A1 DE 3206707 A1 DE3206707 A1 DE 3206707A1 DE 19823206707 DE19823206707 DE 19823206707 DE 3206707 A DE3206707 A DE 3206707A DE 3206707 A1 DE3206707 A1 DE 3206707A1
Authority
DE
Germany
Prior art keywords
absorption
heat
evaporator
temperature
fixed throttles
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.)
Withdrawn
Application number
DE19823206707
Other languages
German (de)
Inventor
Werner Dr.-Ing. 1000 Berlin Malewski
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.)
MALEWSKI, WERNER, DR.-ING., 1000 BERLIN, DE
Original Assignee
ASK TECHNISCHE ENTWICKLUNGEN GMBH+CO BETRIEBS-KG
ASK TECH ENTWICKLUNGEN
Ask Technische Entwicklungen and Co Betriebs Kg 8580 Bayreuth GmbH
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 ASK TECHNISCHE ENTWICKLUNGEN GMBH+CO BETRIEBS-KG, ASK TECH ENTWICKLUNGEN, Ask Technische Entwicklungen and Co Betriebs Kg 8580 Bayreuth GmbH filed Critical ASK TECHNISCHE ENTWICKLUNGEN GMBH+CO BETRIEBS-KG
Priority to DE19823206707 priority Critical patent/DE3206707A1/en
Publication of DE3206707A1 publication Critical patent/DE3206707A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
    • F25B49/043—Operating continuously

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Abstract

The invention relates to a method of controlling the heating heat supply in absorption heat pumps and refrigeration units, when these are equipped with fixed throttles for the expansion of the liquefied working medium to the evaporation pressure. In small units, the incorporation of fixed throttles is preferred, so that the matching of the quantity of refrigerant takes place only in the framework of the pressure difference between the high pressure and low pressure sides. Thus a full loading of the evaporator is only ensured when the absorption process is matched by an altered supply of heating medium. This is solved according to the invention in that the superheat temperature of the refrigerant vapour at the outlet of the evaporator is selected as a measure of the evaporator loading and as a control variable for the heating medium supply. Moreover, independently of this, the feed temperature of the heat uptake side can be controlled via the volume flow of the heat carrier through the absorption system. The two independent control circuits are shown in the diagram. The use of the invention is limited to compact small units, which must manage with fixed throttles. <IMAGE>

Description

PATENTANMELDUNGPATENT APPLICATION

Regelmethode zur Anpassung der Heizwärmezufuhr von Absorptions-Wärmepumpen mit FestdrosselnControl method for adjusting the heating supply from Absorption heat pumps with fixed throttles

Die Erfindung betrifft eine Methode zur Regelung der Heizwärmezufuhr von Ab s ο rp ti ons -'Wärmepumpen und -Kälteaggregaten, wenn diese mit Festdrosseln zur Entspannung des verflüssigten Kältemittels auf den Verdampfungsdruck ausgerüstet sind.The invention relates to a method for regulating the heating supply from Ab s ο rp ti ons -'heat pumps and -cooling units, if these with fixed throttles for the expansion of the liquefied Refrigerant are equipped to the evaporation pressure.

Bekannt sind für Absorptions-Kreisprozesse die unabhängigen Regelungen der Einspritzmenge von Kältemittel in den Verdampfer in Abhängigkeit vom Flüssigkeitsstand im Verdampfer oder der Oberhitzungstemperatur des den Verdampfer verlassenen Kältemitteldampfes sowie der Anpassung der Heizwärmezufuhr in Abhängigkeit von der Lösungstemperatur im Ablauf des Desorbers.The independent regulation of the amount of refrigerant injected into the evaporator is known for absorption cycle processes depending on the liquid level in the evaporator or the overheating temperature of the refrigerant vapor leaving the evaporator as well as the adjustment of the heating supply depending on the solution temperature in the desorber outlet.

Bei Kleinaggregaten wird der Einbau von festen Drosseln in den Kältemittelkreislauf in Form von Blenden, Düsen oder Kapillaren bevorzugt, womit eine Anpassung der Kältemittelmenge nur noch im Rahmen der Druckdifferenz zwischen Hochdruck- und Niederdruckseite, die durch die äußeren Bedingungen aufgezwungen wird, erfolgt. Die Lösungstemperatur im Desorberablauf ist dann keine unabhängige Regelgröße mehr für die Anpassung der Heizmittelzufuhr in Verbindung mit einem angeschlossenen Wärmeabnähmesystem. In the case of small units, fixed throttles are installed in the refrigerant circuit in the form of orifices, nozzles or capillaries preferred, which means that the amount of refrigerant can only be adjusted within the scope of the pressure difference between the high-pressure and low-pressure sides, which is imposed by the external conditions takes place. The solution temperature in the desorber outlet is then none independent control variable more for the adjustment of the heating medium supply in connection with a connected heat absorption system.

Die vorliegende Erfindung soll für diese Verhältnisse unabhängig« Regelsysteme im Absorptionskreislaufsystem und Wärmeabnahmesysteu ermöglichen. Diese Aufgabe wird erfindungsgemäß so gelöst, daß die dem Absorptionssystem zuzuführende Desorberwärme in Abhängigkeit von der Temperaturdifferenz zwischen Oberhitzungstemperatur des Kältemitteldampfes am Verdampferaustritt und der Verdampfungs temperatur nach der Drosselstelle geregelt wird.The present invention is intended to be independent of control systems in the absorption cycle system and heat removal system for these conditions enable. According to the invention, this object is achieved in such a way that the desorber heat to be supplied to the absorption system is dependent on the temperature difference between the overheating temperature of the refrigerant vapor at the evaporator outlet and the evaporation temperature is regulated after the throttle point.

-2-COPY-2-COPY

Außerdem wird die Vorlauftemperatur für das angeschlossene Wärme·· abnahmesystem über "den Volumenstrom des Wärmeträgermediums geregp der durch das Absorptionssystem fließt. Der Absorptionsproz_^ paßt sich auf diese Weise so den Bedingungen an, daß sich das günstigste Verhältnis von im Verdampfer und Desorber umgesetzter Wärme (Wärmeverhältnis) einstellt. Die vorzugebende Temperaturdifferenz hängt von der Verdampferbauart ab. .In addition, the flow temperature for the connected heat is acceptance system via "the volume flow of the heat transfer medium regulated that flows through the absorption system. The absorption process ^ adapts itself in this way to the conditions that the most favorable ratio of converted in the evaporator and desorber Adjusts heat (heat ratio). The temperature difference to be specified depends on the type of evaporator. .

Ein Ausführungsbeispiel einer die Erfindung betreffenden Regelanordnung ist in der Zeichnung dargestellt und wird nachstehend beschrieben:An embodiment of a control arrangement relating to the invention is shown in the drawing and is described below:

In den mit Luft beaufschlagten Verdampfer (1) wird über die Festdrossel (2) flüssiges Kältemittel eingespritzt, das vollständig verdampftund von dem Luftstrom überhitzt wird. Der Kältemitteldampf wird danach im Absorber (3) von aufnahmebereiter Absorption lösung absorbiert und danach mittels der Pumpe (4) unter Vorwärmung, im Temperaturwchsler (5) der Rektifikationskolonne (6) zugeführt. Ein Teil des Kolonnenablaufs wird im Desorber (7) ausgedampft unter Heizmittelzufuhr, die über das Ventil (8) regel bar ist. Die Ansteuerung erfolgt aufgrund der Temperaturdifferenz ermittlung zwischen Verdampfer-Aus- und Eintritt.In the air-pressurized evaporator (1) is via the fixed throttle (2) injected liquid refrigerant which is completely evaporated and superheated by the air flow. The refrigerant vapor is then absorbed in the absorber (3) by absorbent absorption solution and then by means of the pump (4) with preheating, in the temperature changer (5) of the rectification column (6) fed. Part of the column effluent is evaporated in the desorber (7) with a supply of heating medium which regulates via the valve (8) is cash. It is controlled based on the temperature difference between the evaporator outlet and inlet.

Die Wärmeabfuhr''aus dem Absorptionssystem erfolgt mittels eines Wärmeträgermediums nacheinander über den Kondensator (9)> der den nahezu reinen Kältemitteldampf vollständig verflüssigt und zur Df^osselstelle zurückleitet, den Rücklaufkühler (10), in dem ein Teil des Dampfes aus dem Kolonnenkopf kondensiert wird, um als Rücklauf in die Kolonne (6) zur Rektifikation zurückzufließen sowie den Absorber (B), der ausgedampfte kalte Absorptionslösung mit Kältemitteldampf in innigen Kontakt bringt, wobei infolge Absorption Erwärmung der Lösung eintritt.The heat dissipation ″ from the absorption system takes place by means of a Heat transfer medium one after the other via the condenser (9)> which completely liquefies the almost pure refrigerant vapor and guides it back to the Df ^ osselstelle, the return cooler (10), in which a Part of the vapor from the top of the column is condensed in order to flow back as reflux into the column (6) for rectification and the absorber (B), which brings the evaporated cold absorption solution into intimate contact with refrigerant vapor, whereby as a result Absorption heating of the solution occurs.

Dieses Wärmeträgermedium versorgt ein angeschlossenes Abnahmesystem (11) (Wärmeverbraucher) und sein Kreislauf wird über die Umwälzpumpe (12) aufrechterhalten. Durch Steuerung des Dreiwegeventils (13) in Abhängigkeit von der eingestellten Vorlauftempera kann der Volumenstrom durch das Absorptionssystem (14) angepaßtThis heat transfer medium supplies a connected acceptance system (11) (heat consumer) and its circuit is maintained by the circulation pump (12). By controlling the three-way valve (13) depending on the set flow temperature the volume flow through the absorption system (14) can be adjusted

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Claims (1)

PatentansprücheClaims / 1)jRegelmethode zur Anpassung der Heizwärmezufuhr von Absorptions- ^—' Kälte- und Wärmepumpensystemen, die mit Festdrosseln zur Entspannung des verflüssigten Kältemittels auf den Verdampfungsdruck ausgerüstet sind, an die Wärmeabnahme dadurch gekennzeichnet, daß die dem Desorber zuzuführende Heizwärme in Abhängigkeit von der Temperaturdifferenz zwischen der überhitzungstemperatur des Kältemitteldampfes am Verdampferaustritt und der Verdampfungstemperatur nach der Festdrossel geregelt wird./ 1) jControl method for adapting the heating supply of absorption ^ - ' cold and heat pump systems, which are equipped with fixed throttles for expanding the liquefied refrigerant to the evaporation pressure, to the heat consumption characterized in that the heating to be supplied to the desorber depends on the temperature difference between the superheating temperature of the refrigerant vapor at the evaporator outlet and the evaporation temperature after the fixed throttle is regulated. T) Regelmethode nach Anspruch .1 dadurch gekennzeichnet, daß die Vorlauftemperatur des Wärmeträgermediums auf der Wärmeabnahmeseite über den Volumenstrom geregelt wird, der durch das Absorptionssystem zur Wärmeaufnahme geleitet wird. T) control method according to claim .1, characterized in that the flow temperature of the heat transfer medium on the heat absorption side is controlled via the volume flow that is passed through the absorption system for heat absorption. 3) Regelmethode nach Anspruch 1 und 2 dadurch gekennzeichnet, daß der Heizmittelst'rom zum Desorber in Stufen zu- oder abgeschaltet oder kontinuierlich geregelt wird.3) control method according to claim 1 and 2, characterized in that the Heizmittelst'rom to the desorber is switched on or off in stages or is regulated continuously. 4) Regelmethode nach Anspruch 1 dadurch gekennzeichnet, daß4) control method according to claim 1, characterized in that die TemperaturdifferenzUwischen Überhitzungs- und Verdampfungstemperatur des Kältemitteldampfes auf die Verdampferkonstruktion abgestimmt wird. *■the temperature difference between superheating and evaporation temperature of the refrigerant vapor is matched to the evaporator construction. * ■ COPYCOPY
DE19823206707 1982-02-25 1982-02-25 Control method for matching the heating heat supply of absorption heat pumps with fixed throttles Withdrawn DE3206707A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823206707 DE3206707A1 (en) 1982-02-25 1982-02-25 Control method for matching the heating heat supply of absorption heat pumps with fixed throttles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823206707 DE3206707A1 (en) 1982-02-25 1982-02-25 Control method for matching the heating heat supply of absorption heat pumps with fixed throttles

Publications (1)

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DE3206707A1 true DE3206707A1 (en) 1983-09-01

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DE19823206707 Withdrawn DE3206707A1 (en) 1982-02-25 1982-02-25 Control method for matching the heating heat supply of absorption heat pumps with fixed throttles

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195279A2 (en) * 1985-03-06 1986-09-24 MAN Technologie Aktiengesellschaft Method for regulating absorption refrigeration plants or heat pumps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195279A2 (en) * 1985-03-06 1986-09-24 MAN Technologie Aktiengesellschaft Method for regulating absorption refrigeration plants or heat pumps
EP0195279A3 (en) * 1985-03-06 1990-03-28 MAN Technologie Aktiengesellschaft Method for regulating absorption refrigeration plants or heat pumps

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: MALEWSKI, WERNER, DR.-ING., 1000 BERLIN, DE

8139 Disposal/non-payment of the annual fee