EP0062043B1 - Verfahren und maschine zur durchführung einer quasi-isothermischen zustandsänderung bei gaskompressions- oder expansionsvorgängen - Google Patents

Verfahren und maschine zur durchführung einer quasi-isothermischen zustandsänderung bei gaskompressions- oder expansionsvorgängen Download PDF

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EP0062043B1
EP0062043B1 EP81902670A EP81902670A EP0062043B1 EP 0062043 B1 EP0062043 B1 EP 0062043B1 EP 81902670 A EP81902670 A EP 81902670A EP 81902670 A EP81902670 A EP 81902670A EP 0062043 B1 EP0062043 B1 EP 0062043B1
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Prior art keywords
exchanger
heat
working chamber
chamber
quasi
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French (fr)
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EP0062043A1 (de
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Andrei Vasile Chrisoghilos
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L'INSTITUT NATIONAL DE MOTEURS THERMIQUES
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INST NAT MOTOARE TERMICE
L'Institut National de Moteurs Thermiques
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2244/00—Machines having two pistons
    • F02G2244/50—Double acting piston machines

Definitions

  • the invention relates to a method and a machine which allow the carrying out of a quasi-isothermal compression or expansion process, that is to say a process in which the temperature of the working agent remains almost constant. by undergoing practically unimportant variations, throughout the duration of the compression or expansion process, in any thermodynamic cycle which contains such transformations.
  • the cooled heat exchangers are either connected to one another in succession, which causes the circulation of the fluid from the working chambers where the highest pressure prevails towards the working chambers where the lowest pressure prevails, which is equivalent to a lack of sealing, that is to say independent of each other, but insofar as there is n 'is expected that a single orifice between each of the exchangers and the working chamber, the fluid flow is carried out alternately in one direction and the other, that is to say in poor conditions.
  • the working chamber is in connection with several heat exchangers at the same time, it is then very difficult to control the evolution of the pressures and temperatures of the different fluid flows coming from the heat exchangers or directing there.
  • Stirling external combustion engines are also known, produced according to different constructive solutions in which after the compression phase the working agent is cooled in a heat exchanger, then passed through a regenerator and introduced into an expansion chamber heated (Stirling Engines by G. Walker).
  • External combustion engines of this type whatever their constructive solution, have the drawback of being able to allow only reduced compression ratios, which affects the overall efficiency of the engine.
  • the method in accordance with the invention, is applicable to any thermal machine which works with a variable-volume working chamber a and provides that this chamber is connected and disconnected successively and cyclically with two groups of heat exchangers. heat independent of volumes Va1, Va2, Va3 ... etc. namely a group of independent cooled exchangers, of identical construction A, and a group of independent heated exchangers of identical construction B.
  • Each independent cooled heat exchanger A, used in the compression isotherm, is formed by certain heat exchange units 1 which have a window b for the flow of the working agent coming from the exchanger A, towards the working chamber a, and a window c for the flow of the working agent coming from the working chamber a towards the heat exchanger A.
  • a heated heat exchanger B used in the isothermal expansion is formed by a heat exchange unit 2 provided with a window d for the flow of the heat agent from the working chamber a into the exchanger B, and a window e for the flow of the working agent from the exchanger B into the working chamber a.
  • the working chamber of variable volume a can be produced, without the example being limiting, in accordance with the block diagram of FIG. 1 on a rotary machine C, formed of a stator 3 and a rotor 4 in which the pallets slide. 5.
  • the rotary machine C has a suction connection 6, and a discharge connection 7, or a discharge connection 8.
  • the working chamber of variable volume a the parameters of which state initials are P o V o T o , will be connected successively in the compression phase with the heat exchangers A and in the expansion phase with the heat exchangers B via certain windows f, formed in the wall of bedroom.
  • the working agent state parameters of the first heat exchanger A are P ' 1 Va 1 T " 1 .
  • the duration of the connection between the variable volume chamber a and a heat exchanger A has two phases.
  • the first phase in which the working agent of the heat exchanger A flows towards the variable-volume working chamber a, through the window b of the exchanger A and the window f of the wall of the chamber, realizing with the working agent of the working chamber has a polytrope mixture whose state parameters are P z1 , V 0 + V a1 , T z1 , the working agent of the chamber yielding heat to the work agent from the heat exchanger.
  • window b is closed simultaneously with the opening of window c and the two volumes compress together, the gas now flowing from the chamber to the exchanger through windows f and c, carrying the heat pertaining to the mass which leaves the working chamber.
  • the working chamber a detaches from the cooled heat exchanger A, it is connected to the next cooled heat exchanger A, where the process is repeated exactly as at the first exchanger.
  • the working agent of the heat exchanger A disconnected from the working chamber a, evolves according to an isochoric curve by exchanging heat at constant volume throughout the duration of the waiting period, until 'it is connected to the next working chamber, which will find it at state parameters which can be considered identical with the initial parameters existing at the time of contact with the first chamber (P' 1 , V a1 , T " 1 ).
  • the values P i are finished if between the volumes of the working chamber (V;) and the volume of the independent exchanger (V ai ) the relationship is maintained: and one obtains the realization of the circulation in one direction of the working agent in the heat exchangers A and B, that is to say in the direction explained previously if between the same parameters exists the relation: for the quasi-isotherm of compression and for the quasi-isothermal of relaxation.
  • the intensification of the heat transfer up to the level required by an isothermal evolution of the gas of the working chamber, via the heat exchangers in accordance with the invention, is demonstrated by the relationships established, from a side by the influence of the exponent poly trope of common evolution m 1 of value close to the unit and on the other side, by the isochore exchange of the heat of the exchangers expressed by the factor ⁇ i ; which is less than one for the compression isotherm and more than one for the expansion isotherm.
  • FIGS. 2 and 3 show that the curve of the real transformations g for compression and h for relaxation are realized as a result of the addition of certain transformations sequential successive polytropes whose continuity points i are located above and below the theoretical isothermal curve j, for compression and 1 for expansion.
  • FIG. 3 are represented in temperature-entropy coordinates only the curves of the real transformations, that is to say the curve n for the compression and the curve o for the expansion.
  • the process for obtaining the quasi-isothermal transformation in the processes of compression or expansion of gases can be applied to any operating cycle of any thermal machine with working chamber of variable volume and with heat sources and with external heat sources such as: compressors, external combustion engines, heat pumps, refrigeration machines, etc.
  • the rotary external combustion engine in accordance with the present invention, consists of a rotary cylinder 9 in which slides a double-acting piston 10 provided with sealing segments 11.
  • the double-acting piston 10 is mounted halfway of its length using the bearings 12 on a crank pin p of a crankshaft 13 and for mounting reasons is formed of two halves r coupled, on the plane of separation of the bearings using the prisoners 14.
  • the crankshaft 13 rests with its bearing journals g in the side covers 15 and 16 by means of bearings 17 and 18 located on the same axis.
  • the rotary cylinder 9 rests on the side covers 15 and 16 using the bearings 19 and 20 which define an axis III-III perpendicular to the longitudinal axis of the cylinder, dividing it into two equal parts.
  • a toothed wheel 21 with external teeth which meshes in ratio of 1: 2 a toothed wheel with internal teeth 22, integral with the rotary cylinder 9.
  • a toothed wheel with internal teeth 22 integral with the rotary cylinder 9.
  • In the side walls of the rotary cylinder 6 are formed four holes f communicating two by two with each of the variable volume chambers a.
  • Solid with the body of the bearings of the rotary cylinder 9 are mounted two distribution discs 23, one on each side of the rotary cylinder 9.
  • the distribution discs 23 are each provided with two windows s from which galleries 24 which connect these windows to the windows f made in the wall of the rotary cylinder 9.
  • the distribution discs 23 together with the rotary cylinder 9 cause the windows s to pass in front of the radial windows t and u, formed in the fixed covers 15 and 16 and arranged on the same diameter as the windows s placed on the mobile distribution discs 23, t and u being sealed with respect to s.
  • the windows t are used for the connection of the variable-volume working chamber a to a heat exchanger A or B in the first phase by means of certain fittings 25 while the windows u are used for the connection of the same working chamber to a heat exchanger A or B in the second connection phase via the fittings 25.
  • the fitting 25 constitutes the outlet fitting and the fitting 26 the inlet fitting in a heat exchange unit 1 or 2 generally known and belonging to groups of heat exchangers A or B.
  • Each of the windows t and u is sealed on a trapezoidal contour with linear and expandable segments 27 mounted in generally known seats, made in the fixed covers 15 and 16. Still with linear and expandable segments, located continuously on contours blind trapezoids, arranged on the same diameter as the windows t and u, are also sealed the two spaces y located between the two groups of windows and u corresponding to the groups of exchangers A and B.
  • the outer covers 15 and 16 are made in the zone corresponding to the outer dead center of the piston 10 of the windows w, having the same shape and radial location as the windows t and u which are each linked with a suction connection 6. From similar to windows t and u, the windows w are sealed on a trapezoidal contour by the expandable linear segments 27.
  • the suction windows w can be closed, after the engine has arrived at nominal operating speed by n ' any external control, correlated in a generally known manner, to the engine operating parameters.
  • a rotary external combustion engine operates in the following manner. Under the action of the working gases, the double-acting piston 10, performs a translational movement in the cylinder 9, at the same time also imposing the rotation of the crankshaft 13 and the rotary cylinder 9, around the axis III-III with a rotation speed equal to half the rotation speed of the crankshaft.
  • the translational movement is purely harmonic, the maximum stroke of the piston being equal to four times the distance from the axis of the bearing journal p to the axis of the crankshaft 13, that is to say four times the eccentricity crankpin.
  • the gear of the toothed wheels 21 and 22 does not participate in the transmission of the engine torque to the crankshaft. Theoretically, the mechanism is completely determined without this gear.
  • the gear 21-22 doubles the piston-crankpin kinematic chain and has the practical role of facilitating the control of the rotation of the cylinder when the direction of the actuating forces enters under the friction cone, without participating in the transmission of the engine torque. .
  • the mission of the gear is therefore that of overcoming the friction forces in the rotational movement of the cylinder or of the moment of inertia, caused by the variation in the number of revolutions, assuming the only normal forces which could have appeared between the piston and the cylinder walls and which would have determined the rotation of the entire cylinder.
  • the rotary external combustion engine in accordance with the invention, operates according to a Carnot cycle composed of two quasi-isotherms g and h which are the result of the addition of certain successive polytrope sequential transformations whose continuity points 1 are above and below are theoretical isothermal curves i and 1 and two adiabatic curves x and y which can be easily obtained by external thermal insulation, generally known, of the cylinder in the area of the working chamber.
  • the Carnot cycle is carried out with a motor according to the invention, in that in the first part of the compression, the working chamber of variable volume has successively comes into contact with the cooled heat exchangers A on the path of the fittings 25 and 26, windows t and u side covers 15 and 16, window s on the distributor disk 23, galleries 24 and windows f located in the walls of the rotary cylinder 9, storing part of the agent working in these exchangers and by compressing in a quasi-isothermal manner, the rest of the working agent in accordance with the method described above.
  • variable volume chamber When the variable volume chamber has left the last cooled heat exchanger A, adiabatic compression of the working agent remaining in the chamber begins, until the piston bottom dead center.
  • the motor is provided with a corresponding thermal insulation, generally known.
  • variable-volume working chamber a is connected to the heated heat exchangers B, on the same path described previously, with which an exchange of working agent is obtained according to the method described , by determining the quasi-isothermal expansion of the agent remaining in the chamber.
  • the working agent therein relaxes adiabatically until the opening of the suction window w when the working chamber at volume variable a arrives in depression so that it will suck up a quantity of working agent equal to that which it stored in the two groups of heat exchangers A and B during the previous cycle and then the cycle is repeated successively and alternately for the two working chambers a.
  • the process of storing the working agent in the heat exchangers arrives, after a few dozen rotations of the crankshaft, in a stabilized state when the suction set is reduced to zero and the suction window w has to be closed. .
  • the engine works with the working agent in a closed circuit.
  • the mechanical work per cycle and the power of the motor increase proportionally with the increase in the suction pressure of the motor.
  • the aspiration of the working agent can be done directly from the atmosphere or from a closed tank, in which case, the state parameters of the working agent can differ in value from the atmospheric parameters.
  • the working agent can be any gas, gas mixture or heterogeneous gas-liquid mixture.
  • the cooling of the heat exchangers A can be done in a known manner with any cooling agent and the heating of the heat exchangers B can be done with any heat source, including geothermal water, solar source, nuclear power or fuel burner of any type.
  • thermal machine in accordance with the invention, operated as a compressor, it would be necessary to cancel, in comparison with the example presented, the group of heated heat exchangers B and the exhaust connection 7, keeping the group of exchangers heat A and the inlet connection 6 enlarged and a discharge connection 8 would be used.
  • a thermal machine, in accordance with the invention which would function as a compressor, could compress the gases in a single stage at relatively high ratios of compression by discharging the compressed gas at temperatures close to those of the ambient medium.
  • a compressor which would operate in accordance with the invention, due to the reduced temperature of the compression space, could use synthetic materials for the construction of the piston, segments, valves, etc. and would have a relatively simple construction, having a much reduced weight and dimensions as a result of the elimination of the intermediate compression stages.
  • thermal machine in accordance with the invention, operated as a heat pump or refrigeration machine, it would only be necessary to modify the arrangement of the two groups of heat exchangers so as to obtain the course of the cycle in the opposite direction to the case of functioning as an external combustion engine.
  • One group of heated heat exchangers B would be the hot source and constitute the part of the heat pump that heats
  • the other group of heat exchangers A would be the cold source and would constitute the part of the refrigerating machine. which cools.
  • the method and the machine for obtaining a quasi-isothermal transformation in the gas compression or expansion processes can be applied in any industrial field which supposes the need for isothermal compression or expansion , such as the chemical, refrigeration industry, etc. just like in any technical field which supposes the use of thermodynamic transformations to obtain mechanical energy, this one being able to be used in the field of transport, the production of electric energy or in other areas.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Chemical Vapour Deposition (AREA)
  • Rotary Pumps (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Claims (8)

1. Verfahren zum Erreichen von quasi-isothermen Umwandlungen beim Verdichtungs- oder Ausdehnungsprozess von Gasen in einer Arbeitskammer (a) mit veränderlichem Volumen, bei welchem voneinander unabhängige, in Gruppen zusammengesetzte Wärmetauscher (A, B) verwendet werden, die nacheinander und zyklisch mit der Arbeitskammer (a) verbunden und von dieser getrennt werden, dadurch gekennzeichnet, dass mit dem Ziel, in der Kammer ein möglichst hohes Kompressions- oder Ausdehnungsverhältnis zu erhalten, zwei Gruppen gekühlter bzw. beheizter Wärmetauscher (A, B) verwendet werden, wobei jeder Wärmetauscher zwei verschiedene Öffnungen aufweist, die eine (b, e) für den Fluidaustritt zur Kammer und die andere (c, d) für den Fluideinlass von der Kammer, und dass die Kammer nacheinander während der Verdichtungs-Isothermen mit den Wärmetauschern der einen Gruppe (A) und danach während der Ausdehnungs-Isothermen mit den Wärmetauschern der anderen Gruppe (B) verbunden wird, wobei diese Verbindung gleichzeitig mit einem einzigen Wärmetauscher erfolgt und danach der Prozess in zwei Phasen abläuft, nämlich: In der ersten Phase wird in der Verdichtungsisotherme die Arbeitskammer mit der Austrittsöffnung (b) eines gekühlten Wärmetauschers (A) verbunden, was ein Strömen von Gas aus dem Wärmetauscher in die Arbeitskammer (a) bis zum Ausgleich der Drücke der beiden Volumina zur Folge hat, wobei der Mischungsprozess polytrop ist und das Gas der Kammer Wärme auf das vom Wärmetauscher kommende Gas überträgt, und in der zweiten Phase wird die Arbeitskammer mit der Eintrittsöffnung (c) des Wärmetauschers (A) verbunden, was ein Strömen von Gas von der Arbeitskammer in den Wärmetauscher unter Transportieren der zugehörigen Wärme zur Folge hat, wobei die Gesamtmasse des komprimierten Gases Wärme durch den Wärmetauscher (A) überträgt, dagegen wird in der ersten Phase in der Ausdehnungs-Isotherme, die Arbeitskammer mit der Eintrittsöffnung (d) eines beheizten Wärmetauschers (B) verbunden, was ein Strömen von Gas aus der Kammer in den Wärmetauscher bis zum Ausgleich der Drücke der beiden Volumina zur Folge hat, wobei das Gas des Wärmetauschers durch polytropes Mischen Wärme auf das von der Kammer kommende Gas überträgt, und eine zweite Phase, in der die Kammer mit der Austrittsöffnung (e) des Wärmetauschers (B) verbunden ist, bewirkt ein Strömen von Gas unter Transportieren der zugehörigen Wärme, wobei die Gesamtmasse des ausgedehnten Gases Wärme durch den Wärmetauscher (B) erhält; und dass die aufeinanderfolgende Verbindung der unabhängigen Wärmetauscher (A, B) mit der Arbeitskammer (a) derart erfolgt, dass während des Zeitraumes, in dem keine Verbindung zwischen der Kammer und einem Wärmetauscher besteht, eine isochore Änderung des Gases jedes Wärmetauschers sichergestellt wird und dass Wärme in der Verdichtungsisotherme nach aussen transportiert oder in der Ausdehnungs-Isotherme von aussen erhalten wird.
2. Verfahren zum Erreichen bestimmter quasiisothermer Umwandlungen nach Anspruch 1, dadurch gekennzeichnet, dass mit dem Ziel, eine thermo-dynamische Änderung möglichst nahe einer Isothermen zu verwirklichen, die Umwandlungskurve, die durch die aufeinanderfolgende Verbindung und Trennung der Arbeitskammer (a) mit veränderlichem Volumen mit bzw. von den unabhängigen Wärmetauschern (A und B) verwirklicht ist, als eine Resultierende aus der Addition bestimmter, schrittweiser, aufeinanderfolgender polytroper Umwandlungen erhalten wird, wobei ihre Stetigkeitspunkte (i) derart oberhalb und unterhalb der theoretischen lsothermen-Kurve liegen, dass die negative mechanische Arbeit in der Verdichtungsquasiisothermen (g) und die positive mechanische Arbeit in der Ausdehnungsquasiisothermen (h) mit denen bestimmter theoretischer isothermer Umwandlungen (j und I) vergleichbar sind.
3. Verfahren zum Erreichen bestimmter isothermer Umwandlungen nach Anspruch 1, dadurch gekennzeichnet, dass mit den Ziel, eine Zirkulation des Arbeitsmittels in einer einzigen Richtung im Innern eines unabhängigen Wärmetauschers sicherzustellen, die Drücke des Arbeitsmittels der Wärmetauscher durch die Arbeitskammer (a) mit veränderlichem Volumen gewährleistet werden, nämlich durch einen Selbstspeicherungsprozess, bis nach einer Reihe von Zyklen in jedem Wärmetauscher ein stabilisierter Wert des notwendigen und für jeden Zyklus selbstreproduzierbaren Druckes erreicht wird.
4. Verfahren zum Erreichen einer quasi-isothermen Umwandlung in Verdichtungs- und/oder Ausdehnungsprozessen von Gasen nach Anspruch 3, dadurch gekennzeichnet, dass mit dem Ziel, die Zirkulation des Arbeitsfluids in einer einzigen Richtung zu verwirklichen und das Erreichen bestimmter stabilisierter Druckwerte in den zusätzlichen Wärmetauschern (Vai) sicherzustellen, diesen derartigen Abmessungen erteilt werden, dass sie zusammen mit den variablen Volumina (Vi-I) der Arbeitskammer (a) bei Kontakt mit einem Wärmetauscher (A oder B) der Ordnung «i» und mit den variablen Volumina (Vi), wenn die Arbeitskammer (a) sich von den Wärmetauschern (A oder B) der Ordnung «i» trennt, die Gleichungen erfüllen können:
Figure imgb0025
Figure imgb0026
für die Verdichtungsquasiisotherme und:
Figure imgb0027
Figure imgb0028
für die Ausdehnungsquasiisotherme.
5. Verfahren zum Erreichen bestimmter quasiisothermer Umwandlungen mich Änspruch 3, dadurch gekennzeichnet, dass ein Teil des Arbeitsfluids, das durch eine Austrittsöffnung (b, e) eines Wärmetauschers (A, B) gefördert wird, sich polytrop mit der Gesamtmenge des Fluids der Arbeitskammer (a) vermengt und mit diesem an den thermo-dynamischen Umwandlungen im weiteren Verfahrensablauf teilnimmt, wohingegen ein anderer Teil des Fluids gleicher Menge wie der erste, der durch eine Eintrittsöffnung (c, d) von der Arbeitskammer (a) in einen Wärmetauscher (A, B) gefördert wird, den gesamten Weg des Wärmetauschers (A, B) zwischen der Eintrittsöffnung (c, d) und der Austrittsöffnung (b, e) durchläuft und dabei, gepaart mit dem Arbeitsmedium des Wärmetauschers, isochore Umwandlungen, mit Wärmeverlust für den Wärmetauscher (A) in der Verdichtungsphase oder Wärmegewinn für den Wärmetauscher (B) in der Ausdehnungsphase erfährt, bevor er nach einer gewissen Anzahl von Zyklen durch die Austrittsöffnungen (b, e) in die Arbeitskammer (a) zurückkehrt.
6. Thermische Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 5, welche durch einen rotierenden Zylinder gebildet ist, in dem ein doppelt wirkender Kolben angeordnet ist, dadurch gekennzeichnet, dass sie eine Gruppe unabhängiger, gekühlter Wärmetauscher (A) für die Verdichtungsphase und eine Gruppe unabhängiger, geheizter Wärmetauscher (B) für die Ausdehnungsphase aufweist, wobei die Verbindung und nachfolgende Trennung zwischen jedem unabhängigen Wärmetauscher und einer Arbeitskammer (a) mit veränderlichem Volumen der thermischen Vorrichtung über Fensteröffnungen (f), die in den Wänden eines rotierenden Zylinders (9) angeordnet sind, über Gänge (24) der Fensteröffnungen (s), die in bestimmten Verteilerscheiben (23) angeordnet sind, über Fensteröffnungen (t und u), die auf den festen Abdekkungen (15 und 16) des Motorgehäuses gelegen und radial angeordnet und über eine trapezartige Kontur durch geradlinige dehnbare Segmente (27) abgedichtet sind, und über bestimmte Verbindungselemente (25 und 26) gebildet wird, die selbst die Eintritts- und Austrittsverbindung in einen unabhängigen Wärmetauscher (A und B) darstellen.
7. Thermische Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass jeder Wärmetauscher mit einer Arbeitskammer (a) mit veränderlichem Volumen über zwei Fensteröffnungen (t und u) verbindbar ist, die über eine trapezförmige Kontur abgedichtet sind, wobei eine Fensteröffnung (t) die Verbindung zur Verwirklichung der ersten Phase der quasiisothermen Umwandlung sicherstellt, wohingegen die zweite Fensteröffnung (u) die Verbindung zur Verwirklichung der zweiten Phase des quasiisothermen Umwandlungsprozesses sicherstellt.
8. Thermische Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass bestimmte Zwischenräume (v), die zwischen den beiden Gruppen von Fensteröffnungen (t und u), die den Gruppen von Wärmetauschern (A und B) entsprechen, angeordnet sind, durch geradlinige dehnbare Segmente (27) abgedichtet sind, die kontinuierlich auf die Konturen mit dichtender trapezartiger Form angeordnet sind und dieselbe radiale Anordnung, wie die Gruppen von Verbindungs-Fensteröffnungen (t und u) aufweisen.
EP81902670A 1980-10-08 1981-09-07 Verfahren und maschine zur durchführung einer quasi-isothermischen zustandsänderung bei gaskompressions- oder expansionsvorgängen Expired EP0062043B1 (de)

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RO81102311A RO77965A2 (ro) 1980-10-08 1980-10-08 Procedeu si masina pentru obtinerea transformarii guasi-izotermice inprocesele de comprimare sau destindere
RO102311 1980-10-08

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EP0062043B1 true EP0062043B1 (de) 1985-08-14

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US (1) US4502284A (de)
EP (1) EP0062043B1 (de)
JP (1) JPS57501789A (de)
BR (1) BR8108832A (de)
RO (1) RO77965A2 (de)
SU (1) SU1386038A3 (de)
WO (1) WO1982001220A1 (de)

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US5454426A (en) * 1993-09-20 1995-10-03 Moseley; Thomas S. Thermal sweep insulation system for minimizing entropy increase of an associated adiabatic enthalpizer
US6427453B1 (en) * 1998-07-31 2002-08-06 The Texas A&M University System Vapor-compression evaporative air conditioning systems and components
US7726959B2 (en) * 1998-07-31 2010-06-01 The Texas A&M University Gerotor apparatus for a quasi-isothermal Brayton cycle engine
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BR8108832A (pt) 1982-08-24
SU1386038A3 (ru) 1988-03-30
RO77965A2 (ro) 1983-09-26
EP0062043A1 (de) 1982-10-13
US4502284A (en) 1985-03-05
WO1982001220A1 (fr) 1982-04-15
RO77965B1 (ro) 1983-08-30
JPS57501789A (de) 1982-10-07

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