Abstract: The invention describes a sorption self-cooling beverage device which cools its beverage instantaneously, and no heat conducting surfaces are required. A chamber containing a beverage is mixed with a consumable refrigerant such as water. The boiling point of the beverage-refrigerant mixture is lowered to freezing temperatures by an air vacuum. The vapor generated by the boiling beverage-refrigerant mixture is conducted to another chamber containing a desiccant, which removes the vapor. A barrier permeable to water vapor but not to desiccant particles is placed between the beverage-refrigerant and desiccant chambers to prevent a contamination of the beverage by the desiccant. A water absorber is placed in the desiccant chamber to prevent a contamination of the beverage with liquid which may have entered the desiccant chamber from the beverage chamber.

Abstract: A hybrid air-conditioning system having an absorption refrigeration subsystem for sensible heat loads and a cooperating liquid desiccant dehumidification subsystem for latent heat loads incorporates additional apparatus for effecting the efficient transfer of available absorber element heat from the absorption refrigeration subsystem to the desiccant dehumidification subsystem desiccant regenerator element to improve the total system Coefficient of Performance (C.O.P.) over a wide range of latent heat load to sensible heat load proportions.

Abstract: Disclosed is a self-contained, rapid cooling device that retains heat produced from the cooling process and can be stored for indefinite periods without losing its cooling potential. A liquid in a first chamber undergoes a change of phase into vapor which cools the first chamber. A second chamber forms a vacuum insulation about a third chamber which contains a sorbent. The sorbent in the third chamber is in fluid communication with the vapor and removes the vapor from the first chamber. The device is self-contained because a material in contact with the sorbent removes the heat from the sorbent to prevent the reduction in the cooling effect produced by the first chamber. In addition, a vacuum insulation about the third chamber keeps the heated sorbent from diminishing that cooling effect.

Abstract: A method and apparatus combining absorption refrigeration and mechanical expansion refrigeration to chill an air conditioning medium wherein a mechanical refrigeration system is alternately (1) connected in series with an absorption refrigeration system during a cooling cycle to cool an external air conditioning medium, and (2) connected to drive the absorption system during a storage cycle to concentrate and store a strong internal liquid absorbent solution and to store an internal diluent refrigeration liquid which liquids are utilized during the cooling cycle.

Abstract: Apparatus and process are disclosed for increasing the efficiency of thermally powered absorption heat pumps which use volatile absorbents. The improvement reduces rectification losses in absorption cycles having at least two generators operating at different pressures. In FIG. 1, the rectifier (7) for the higher pressure generator (1) is refluxed at least in part by exchanging latent heat (9) between rectifier vapor and absorbent solution at the approximate pressure of the lower pressure generator.

Abstract: Apparatus and process are disclosed for increasing the quantity of heat exchange possible between the temperature overlap portions of a generator and an absorber in an absorption cycle compressor or heat pump. Referring to FIG. 1, the heat duty of Generator-Absorber Heat Exchange (GAX) absorber 4 is increased and the heat duty of GAX desorber 6 is decreased by branching sorbent flow from absorber 4 at point 7, and circulating the branch flow by pump 10 to externally-heated desorber 1.

Abstract: Disclosed is a multi-staged desiccant refrigeration device which employs an evaporator combined with a multi-staged vapor desiccant/heat sink module which absorbs water vapor from the evaporator. A plurality of stage vapor desiccant/heat desiccant modules are incorporated in the device, the automatic staged opening and closing of the modules allowing for a continuous and more efficient refrigeration process.

Abstract: An absorption apparatus comprising a housing and an absorber contained within the housing for producing a strong refrigerant solution. A generator refrigerant reservoir is situated in the bottom of the housing for producing a rising refrigerant vapor. A condensor is situated in the top of the housing for condensing the refrigerant vapor into a refrigerant liquid. An evaporator is disposed underneath the condensor in the housing for receiving the refrigerant liquid from the condensor and vaporizing the same to create a refrigerant effect. The absorption apparatus additionally comprises a pump for pumping the strong refrigerant solution from the absorber to the generator refrigerant reservoir. A process for producing a refrigerant effect within a housing comprising producing a strong refrigerant solution by an absorber contained within the housing, and also producing a rising refrigerant vapor from a generator refrigerant reservoir positioned within the housing.

Abstract: Disclosed is a self-contained, rapid cooling device that can be stored for indefinite periods without losing its cooling potential. A liquid in a first chamber undergoes a change of phase into vapor which cools the first chamber. A sorbent in a second chamber is in fluid communication with the vapor and removes the vapor from the first chamber. A heat sink material thermally coupled to the sorbent collects and irreversibly captures heat transferred from the vapor to the sorbent.

Abstract: Disclosed is a device for simultaneously heating and cooling adjacent food portions. A first module defining a first hollow chamber is formed into a substantially planar surface for supporting the food portion to be cooled. The first chamber contains a vaporizable substance in equilibrium with vapor. A second module defining a second hollow chamber is likwise formed into a substantially planar surface for supporting the food portion to be heated. The second chamber contains a sorbent and is evacuated. The chambers are fluidly interconnected by a conduit having a normally closed valve to prevent egress of vapor from the first chamber. In use, the valve is open, allowing vapor from the first chamber to flow into the evacuated second chamber. The resulting drop in pressure allows the vaporizable substance in the first chamber to change phase into vapor, thereby cooling the first chamber and its associated food portion.

Abstract: A process for the operation of hybrid compression-absorption heat pumps or refrigerators with the use of fluid medium containing a mixture of differently volatile components (typically two) easily soluble in each other. During heat extraction, in a first counter current heat exchange, vapor of the more volatile component is partially dissolved in the liquid of the less volatile component. Simultaneously, an additional portion of the volatile component is condensed. Importantly, the medium is discharged from the first heat exchange in a stage of incomplete dissolution/condensation of the vapor phase. The combined medium is expanded and absorbs heat in a second counter current heat exchange phase, during which the more volatile component is both expelled from the solution and evaporated.

Abstract: An absorption refrigeration method and apparatus having concentrator and evaporator phases operated at substantially equal pressure and wherein the concentrator phase utilizes a mechanically driven heat pump to concentrate absorbent solution and to condense the diluent.

Abstract: Disclosed is a self-contained, rapid cooling device that can be stored for indefinite periods without losing its cooling potential. A liquid in a first chamber undergoes a change of phase into vapor which cools the first chamber. A sorbent in a second chamber is in fluid communication with the vapor and removes the vapor from the first chamber. A heat sink material thermally coupled to the sorbent collects and irreversibly captures heat transferred from the vapor to the sorbent.

Abstract: Disclosed is a self-contained, rapid cooling device that can be stored for indefinite periods without losing its cooling potential. A liquid in a first chamber undergoes a change of phase into vapor which cools the first chamber. A sorbent in a second chamber is in fluid communication with the vapor and removes the vapor from the first chamber. The cooling process is facilitated by providing the interior surface of the first chamber with a wicking material to retain the largest possible contact between the liquid and the first chamber as the level of the liquid lowers during the vaporization process. A phase separator and a porous space-filling wick prevent unvaporized liquid from passing into the second chamber.

Abstract: A high efficiency open-cycle absorptive approach to compressing steam or other vapor is disclosed, especially useful for industrial evaportion via recompression. Referring to FIG. 1, low pressure steam from evaporator 1 is absorbed in an aqueous absorbent solution so as to release heat in both absorber 7 and GAX exchanger 8. External heat is applied to generator 12. Steam at higher pressure is desorbed from both gnerator 12 and GAX exchanger 8, and used to heat evaporator 1. Absorber 7 heat is also used to heat and evaporate the mixture undergoing evaporation.

Abstract: The invention provides a working fluid for an absorption refrigeration, cooling or heating system comprising a mixture of dimethyl formamide and N-methyl-2-pyrrolidone as the absorbent therein.

Abstract: The invention provides a method and apparatus for quantity controlled, continuous liquid exchange in distillation and absorption refrigerant circuits.In the method on the one hand the pressure of a volumetric liquid flow, to be supplied to the high pressure zone at a defined rate, of enriched starting solution is raised from a low level to a high pressure level, while on the other hand the mutually separated liquid flows (which in sum are equal in amount) to be removed from the high pressure zone, of the product condensate and of the depleted solution, are transferred from a high pressure level to a low pressure level. In a solution exchange apparatus the method utilizes mechanical energy of the liquid flows (which are to be depressurized and to be removed from the apparatus) and only requires a small external boosting device to overcome internal frictional and intercomponent leakage.

Abstract: Disclosed is a self-contained, rapid cooling device that retains heat produced from the cooling process and can be stored for indefinite periods without loosing its cooling potential. A liquid in a first chamber undergoes a change of phase into vapor, which cools the first chamber. A sorbent in a second chamber is in fluid communication with the vapor and removes the vapor from the first chamber. The cooling process is facilitated by lining the interior surface of the first chamber with a wicking material to retain the largest possible contact between the liquid and the first chamber as the level of the liquid lowers during the vaporization process. A phase separator prevents unvaporized liquid from passing into the second chamber. The device is self-contained because a material in contact with the sorbent removes the heat from the sorbent to prevent the reduction in the cooling effect produced by the first chamber.

Abstract: A process for transferring heat from a lower temperature material to a higher temperature material utilizes a non-azeotropic working fluid mixture and overlapping temperatures in the evaporator (desorber) and condenser (absorber). An apparatus for effectuating the process thermally couples the evaporator (desorber) and condenser (absorber).

Abstract: Heat is transferred between conduit sections so as to use heat which otherwise would not be utilized and improve the efficiency of the apparatus and method. The sections contain working fluids flowing in opposite directions. Heat transfer longitudinally of the conduit sections is reduced relative to heat transfer transversely of the conduit sections. In a preferred embodiment, the conduit sections extend at an acute angle to the direction of the principal gravity or other acceleration field; that is, at an acute angle to horizontal in a stationary system, or at an acute angle to the radial direction in a rotary system.

Abstract: The invention relates to a method of operating a heat pump system in an absorption heat pump mode and/or boiler heating mode. According to this method, a solution of a refrigerant in a solvent is heated in a boiler, the evaporated refrigerant is delivered either directly to an absorber through a condenser, a throttle and an evaporator when the system is operated in the heat pump mode, or directly to an absorber when the system is in the boiler heating mode. The refrigerant is combined with the solvent that is drawn, low in refrigerant, from the boiler. The rich solution thus obtained is redirected to the boiler. To shut down the system, the heating of the boiler is turned off.

Abstract: A method for the automatic control of absorption refrigeration plant or a heat pump, by control of the supply of refrigerant to the evaporator of the plant as dependent on the temperature and the pressure of the vapor issuing from the evaporator in such a way that there is a slight degree of overheating of the vapor. At the same time the boiler power is varied in accordance with the temperature of the refrigerant vapor emerging from the boiler. The cooling for the expelled refrigerant vapor is provided by the rich solution from an absorber in a dephlegmatizer having two stages and the solution cooling circuit includes an intermediate cooler for enhancing the rectifying process when marginal conditions are unfavorable.

Abstract: A process and apparatus for deriving useful heat from a low temperature waste heat-carrying fluid by means of a medium which can be divided into a strong solution in vapor form and a weak solution, the medium circulating in a closed circuit. Waste heat is used to divide the medium into the two solutions at low pressure, after which the strong solution is condensed, placed at increased pressure and then evaporated by receiving additional waste heat. The weak solution is placed at increased pressure and then mixed with the evaporated strong solution at increased pressure to absorb the latter and cause it to liberate heat. The resulting mixture is used to, successively, superheat the evaporated strong solution at increased pressure, heat the weak solution at increased pressure and heat the condensed strong solution at increased pressure, after which the pressure of the mixture is reduced to provide the medium which is divided into the two solutions.

Abstract: A method of operating an absorption heat pump or refrigerator consisting at least of a refrigerant circuit and a refrigerant-containing solution circuit, with a generator for evaporating refrigerant from the solution with the supply of relatively high-temperature heat, a condenser for condensing refrigerant and giving up heat at an intermediate temperature level, an evaporator for evaporating refrigerant with the absorption of heat from a relatively cold heat source, a heat exchanger for transferring heat from the liquid passing out of the condenser to the refrigerant vapor and liquid coming from the evaporator, an absorber for absorbing refrigerant vapor into the solution with the giving-up of heat at an intermediate temperature level, and means for circulating the solution or maintaining the pressure, wherein the delivery of refrigerant is regulated in such a manner that the temperature differential .DELTA.t.sub.

Abstract: A plurality of adsorption containers are provided which are separated into heater adsorber zones and condenser evaporator zones. The zones are successfully rotated through flow segments which form a passageway for heat carrier flows. The heater adsorption zones contain an adsorption substance from which an operating substance is extracted by adsorbing heat from a heat carrier flow and is again adsorbed by emitting heat to a further heat carrier flow. The operating substance condenses and evaporates by means of a heat exchange with further heat exchangers. The adsorption devices are suitable as cooling devices and heat pumps as well as heat transformers and heat exchangers.

Abstract: A water vapor absorbing composition containing CsOH is disclosed which is useful in absorption cycle heat pumping processes and apparatus. When combined with at least one of KOH and NaOH, the absorbent makes possible exceptionally high lifts of the temperature of heat which is initially at low ambient temperatures. Acceptably low corrosion rates are achieved with standard materials of construction using ordinary corrosion inhibitors.

Abstract: The invention refers to a process and devices for the reutilization of low-level thermal energy. According to the invention, devices are utilized forming an evaporator-mixer, advantageously connected to devices forming an evaporator-separator in order to supply from a low-level heat source, for example at 25.degree. C., higher-level heat, for example at 80.degree. C., by making use of the phenomena of evaporation and mixing of two fluids in vapor-pressure equilibrium at different temperatures. The invention also allows and applies in particular to the utilization of the noble thermal energy consumed in a high-temperature boiler. To this end, the heat given off in the boiler is first used to assure in evaporator-separators the formation or reconstitution of concentrated solutions from diluted solutions, and these concentrated solutions are utilized according to the needs of demand to extract by means of evaporator-mixers heat coming from a low-level source.

Abstract: An absorption cooling and heating apparatus and method, in which generator means evaporates a refrigerant from a solution therewithin to form refrigerant vapor, and condenser means then condenses the refrigerant vapor so produced within the generator means. Evaporator means receives the condensed refrigerant from the condenser means, and evaporates the same to form vapor therewithin, with absorber means being provided to absorb the refrigerant vapor that was formed in the evaporator means. The absorber means also receives a concentrated solution conveyed from the generator means, and delivers a dilute solution to the generator means. Heat exchanger means is provided for effecting heat exchange between the concentrated solution being passed to the absorber means, and the dilute solution being returned back to the generator means. Also, switch means for alternately changing to a cooling or to a heating cycle is provided.

Abstract: Disclosed is a method and apparatus for refrigeration utilizing a combined mechanical and absorption cycle. Two immiscible or only partly miscible refrigerants are mixed and evaporated in an evaporator to cool a process stream. The refrigerants are separated in an absorber which absorbs one of the refrigerants from the vapor mixture. The non-absorbed refrigerant vapor is compressed and condensed, while the absorbed refrigerant is desorbed and condensed to produce respective liquid refrigerant streams to the evaporator. Optionally the vapor mixture from the evaporator is compressed in a first stage of compression prior to passing to the absorber.

Abstract: A method of operating a bimodal heat pump is provided, such heat pump operating in a first mode as an absorption heat pump and in a second mode as a device for indirectly heating a heat-transport medium.

Abstract: A process is provided for producing cold and/or heat by means of a thermal unit operating by absorption. Increased performances are obtained by using a condensable auxiliary fluid and performing the absorption in two successive steps (absorbers A.sub.20 and A.sub.21). The unit for conducting the process essentially comprises a generator (S.sub.20), a condenser (E.sub.20), an evaporator (E.sub.21) and two absorbers (A.sub.20 and A.sub.21).

Abstract: Multi-stage apparatuses are described, which operate with absorption cycles, can be used for harnessing heat energy and/or work and are distinguished by high efficiency and/or high adaptability. The apparatuses operate with a working fluid which can be absorbed in an absorbent and include as their primary components so-called exchange units, and possibly at least one pressure machine in addition. The term "exchange unit" is intended to encompass absorbers, condensers, resorbers, evaporators, desorbers and absorbers such as are conventional in absorber and resorber machines; the term "pressure machines" is intended to encompass compressors and expansion machines. Preferred forms of embodiment of the present apparatus are heat pumps, which can be adapted over wide ranges to variable outdoor temperatures and variable heat requirements.

Abstract: The invention refers to a process and devices for the reutilization of low-level thermal energy. According to the invention, devices are utilized forming an evaporator-mixer, advantageously connected to devices forming an evaporator-separator in order to supply from a low-level heat source, for example at 25.degree. C., higher-level heat, for example at 80.degree. C., by making use of the phenomena of evaporation and mixing of two fluids in vapor-pressure equilibrium at different temperatures. The invention also allows and applies in particular to the utilization of the noble thermal energy consumed in a high-temperature boiler. To this end, the heat given off in the boiler is first used to assure in evaporator-separators the formation or reconstitution of concentrated solutions from diluted solutions, and these concentrated solutions are utilized according to the needs of demand to extract by means of evaporator-mixers heat coming from a low-level source.

Abstract: There is provided a method of operating a bimodal heat pump which in a first mode operates as an absorption heat pump and in a second mode operates as an evaporation-condensation device at a comparatively low ambient temperature. When switching from the first mode to the second mode, the evaporator and the absorber are uncoupled from the generator and the condenser. The generator and the condenser are operated in the second mode as an evaporation-condensation device, an extra quantity of working medium being present. The passage from the condenser to the evaporator is positioned at a level that provides the extra quantity of the working medium when starting the second mode.

Abstract: A rotary inertial thermodynamic absorptive system which can be used as a gas-driven heat pump, a heat-flow-driven gas pump, or, in combination, a heat splitter for moving low-grade heat energy from a lower temperature source to a higher temperature heat sink. In one embodiment, an absorptive type rotary inertial thermodynamic device employs overspill/underspill barriers in its absorption and desorption chambers to achieve counterflow heat exchange therebetween and to ensure effective control of thermodynamic impedance.

Abstract: The present invention relates to a separator for the separation of non-condensables and of additives from aqueous lithium bromide used in chillers of the type using water as refrigerant and lithium bromide as absorbent, comprising a vessel of adequate size, provided with inlet means for the liquid containing the non-condensables and/or additive, outlet means for the non-condensables and for the solution enriched with additive, and outlet means for the main quantity of the solution depleted of said non-condensables and/or additive, the configuration of the vessel being such that the liquid flows therethrough in a substantially laminar stream, the time of retention in the vessel being adequate to attain the desired degree of separation. A preferred embodiment comprises a separator of horizontal configuration, comprising a conical or polyhedric shell having an opening angle of about 6.degree. to 10.degree.

Abstract: A control device for an absorption system interrupts a pneumatic signal controlling the demand for chilled water by utilizing a single port direct acting controller to which is fed a chilled water return temperature signal. The single port direct acting controller provides a continuous signal to control the heating source utilized in providing the chilled water as a real time function of the temperature of the chilled water returning from an associated cooled building, as well as the internal controls of the absorption system. Thus, the control device provides an optimal decision value, factoring all dynamic operating variations which affect chilled water return temperature, for the control of the heating source utilized in providing chilled water, thereby reducing the fuel consumption of the absorption refrigeration system. Alternatively, a dual port direct acting controller is added, to which are fed an outdoor air humidity signal and an outdoor air temperature signal.

Abstract: The invention relates to a heat pump with compressor, in the thermodynamic system of which, solution is used. This way varying temperature conditions take place on the heat intake and heat discharge side. Provided that varying temperature system appears also on the demand side, adapting the heat pump of the invention accordingly, the specific cooling capacity may be several times that of the traditional cooling machines under identical temperature parameters.The "wet compression" worked out in the invention, results in further increase of the specific cooling capacity, as well as it makes the competetiveness of the heat pump according to the invention indisputable in such field as for instance deep freezing.

Abstract: This invention relates to a highly efficient refrigeration system and process, driven by low-grade heat and operated at pressures substantially below atmospheric, which provides cooling at temperatures generally within the range from about -12.degree. to about +15.degree. C. Solutions of normally liquid, mutually soluble compounds, having substantially different boiling points, are employed as refrigerant and absorbent. Typically, the absorbent comprises a distillation bottoms fraction containing from about 65 to about 95 mol. % of the higher-boiling compound and the refrigerant comprises a distillation overhead fraction containing from about 93 to about 99 mol. % of the lower-boiling compound. Multi-effect modes may be employed.

Abstract: This invention relates to a highly efficient refrigeration system and process, employing two absorption refrigeration cycles in series operation, the first cycle comprising an ammonia-aqueous ammonia system and the second cycle comprising a novel absorption system and process, driven by low-grade heat and operated at pressures substantially below atmospheric, which provides cooling at temperatures as low as about -12.degree. C. to about +15.degree. C. Solutions of normally liquid, mutually soluble compounds, having substantially different boiling points, are employed as refrigerant and absorbent. Typically, the absorbent comprises a distillation bottoms fraction containing from about 65 to about 95 mole % of the higher-boiling compound and the refrigerant comprises a distillation overhead fraction containing from about 93 to about 99 mol. % of the lower-boiling compound. Heat pumped up in the first ammonia cycle is absorbed in the second cycle by refrigerant at the coolant temperature achieved therein.

Abstract: In an absorption heat pump capable of bivalent operation, to make possible combined operation in addition to the pure heat pump operation and the pure boiler operation, it is proposed to divide the refrigerant stream after the condenser and the stream of weak solution leaving the boiler, with one component stream of the refrigerant being fed through the refrigerant throttle and the vaporizer to a low-pressure absorber, into which a component stream of the weak solution is introduced through the temperature changer and the solvent throttle, while the other component stream of the refrigerant is fed either directly to the boiler or to a high-pressure absorber, to which the other component stream of the weak solution is fed directly in both cases, and to feed the strong solution from the low-pressure absorber through the temperature changer and/or the reflux condenser to the boiler, but on the other hand to feed the solution from the high-pressure absorber directly to the boiler.

Abstract: The present invention relates to a method of determining the set point of a pressure and temperature controller for the high-pressure part of a sorption heat pump.Since the manufacturer of sorption heat pumps does not know from the outset at which location the heat pump is to be installed, such heat pumps cannot be preadjusted, but must be adjusted individually at the location of installation in accordance with the requirements of the user and the expected outdoor temperature.It is the object of the present invention to provide possibilities for preadjusting the temperature and pressure controllers of sorption heat pumps to values which are subsequently varied only in dependence on the day-to-day operating conditions.

Abstract: A method of operating a bimodal heat pump which in a first mode operates as an absorption heat pump and in a second mode operates as an evaporation-condensation device at a comparatively low ambient temperature. When switching from the first mode to the second mode, evaporator 15 and absorber 23 are uncoupled from generator 1 and condensor 7. The generator 1 and condensor 7 are operated in the second mode as an evaporation-condensation device, an extra quantity of working medium present in the condensor 7 being provided in the system. The heat pump comprises an overflow to the evaporator 15 the level 83 of which is a measure of an extra quantity of the working medium and has a closable transport pipe to the generator 1 for supplying extra working medium to the generator 1 when starting the second mode.The heat pump is meant in particular for heating spaces and presents the possibility of choosings from various working media and solvents having different decomposition temperatures.

Abstract: Apparatus for carrying out a combined absorption and adsorption process comprising an adsorber (1) housing adsorbent (30) (e.g. 13.times.

Abstract: A process for cold and/or heat production using carbon dioxide, a solvent for carbon dioxide and a condensable fluid (F), comprising conducting an absorption/condensation step wherein carbon dioxide is absorbed in the solvent and the gaseous fluid (F) is condensed, a step of separation of the resultant liquid phases, a desorption step for the CO.sub.2 solution, a mixing step and an evaporation step for the condensed fluid (F).

Abstract: A dilution cycle control system for an absorption refrigeration system is disclosed. The control system includes a time delay relay for sensing shutdown of the absorption refrigeration system and for generating a control signal only after expiration of a preselected time period measured from the sensed shutdown of the absorption refrigeration system, during which the absorption refrigeration system is not restarted. A dilution cycle for the absorption refrigeration system is initiated in response to generation of a control signal by the time delay relay. This control system is particularly suitable for use with an absorption refrigeration system which is frequently cycled on and off since the time delay provided by the control system prevents needless dilution of the absorption refrigeration system when the system is turned off for only a short period of time and then is turned back on.

Abstract: A three phase absorption system containing two or more reactor systems for binding refrigerant in a thermally reversible chemical reaction to absorbent materials within the reactor systems, means for supplying heat to, and removing heat from the reactor systems, means for recovery of at least part of the sensible heat energy from reactors in each of the reactor systems, and means for conveying, expanding, evaporating and condensing refrigerant gas from the reactor systems.

Abstract: Cold is produced in a phase separation cycle comprising the steps of (a) compressing a refrigerant fluid and dissolving it in a solvent, (b) cooling resultant solution to form two distinct liquid phases, (c) separating the liquid phases, (d) recycling the heavy phase, (e) expanding and vaporizing the light phase to produce cold, and (f) recycling the vaporized light phase. A portion of the cold produced in step (e) is used to cool the solution from step (a), and another portion is used to cool an external medium.

Abstract: A reabsorption method and apparatus for transforming low temperature heat into medium temperature heat by utilizing the energy of high temperature heat. This system utilizes non-adiabatic, differential desorption and absorption and internal heat transfer between the two reactions while being operated by a single solution pump only. A desorber, absorber and solution recuperator of a first loop are integrated to form one unit while a reabsorber, degasser and solution recuperator of a second loop are integrated to form a second unit.

Abstract: Cold and/or heat are produced by means of an absorption cycle. The process comprises six steps:(a) contacting, in an absorption/condensation step, a liquid phase of solvent (S) with a gas phase comprising both a working fluid (F) and a fluid (H),(b) separating the solution of fluid (F) in the solvent (S) from the liquid phase of fluid (H),(c) desorbing the solution of fluid (F) in the solvent (S),(d) condensing the vapor phase of high fluid (F) content obtained in step (c),(e) admixing the liquid condensation phase of step (d) with the liquid phase of fluid (H) of step (b), and vaporizing the resultant mixture, and(f) recycling a resultant gas phase to step (a).The fluid (F) is, for example, ammonia, the solvent (S) water and the fluid (H) a hydrocarbon.