Abstract: An ammonia GAX absorption cycle comprising a first pipe allowing a strong solution generated in an absorber to pass through a rectifier to rectify a coolant vapor provided from a generator the rectifier into a highly concentrated coolant vapor, a second pipe allowing the strong solution flowing in the first pipe and heated in the rectifier flow into a GAX-absorber/generator to undergo heat exchange with a weak solution provided from the generator into the absorber, a third pipe allowing the strong solution enter a solution cooling absorber to undergo heat exchange with the weak solution cooled in the GAX-absorber/generator, and a coolant introducer allowing the strong solution flowing in the second and third pipes and heated by heat exchange to flow into the generator and undergo heat exchange with the coolant vapor and weak solution produced in the generator.

Abstract: An air-cooled absorption-type air conditioning apparatus performs both cooling and heating operations. The apparatus includes circulation pipes through which a thermal medium flows, the thermal medium being for controlling room air temperature. Further included in the apparatus are outer pipes provided concentrically and outside of sections of the circulation pipes to form chambers between the circulation pipes and the outer pipes. The outer pipes have fins on external surfaces of the outer pipes, and the fins are arranged in a substantially vertical orientation. Also included in the apparatus are a fan for circulating air over the outer pipes, first spray mechanisms for dispensing a liquid coolant over outer surfaces of the circulation pipes in the chambers formed between the circulation pipes and the outer pipes, and second spray mechanisms for dispensing an absorption liquid onto inner surfaces of the outer pipes in the chambers, the absorption liquid being for absorbing the liquid coolant.

Abstract: A Vapor Recompression Absorber (VRA) for reprocessing a concentrated solution of water refrigerant and Lithium-Bromide salt from at least one solution concentrator in a closed chiller system, the VRA being comprised of an upper heat-in absorption chamber and a lower heat-out evaporation chamber and sump separated by a thin polymer heat transfer wall, strong solution from the system applied as a falling film to the heat-in side is recirculated, while strong solution applied as a falling film to the heat-out side and evaporation therefrom transported by a vapor compressor to the absorption chamber and condensed for recirculation, the sump solution being being strengthened and delivered to and evaporated in the absorber of the chiller system for maximized chilling of a water distribution system.

Abstract: An absorption refrigerator uses water as a refrigerant and a halogen compound as an absorption solution, and is characterized in that an oxide film of thickness of 0.02-5.0 .mu.m is formed on a surface of at least one of a heat exchanger and a high temperature regenerator. And a production method of the absorption refrigerator is characterized by oxidizing a surface of at least one of a heat exchanger and a high temperature regenerator at a temperature of 200.degree.-800.degree. C., and adjusting a heating temperature and a heating retaining time so that a value of parameter(P), obtained according to P=T (5+log t) is 3.5-6.0.times.10.sup.3, wherein T represents heating temperature (.degree.K), and t heating retaining time (minute).

Abstract: An absorption type refrigerator capable of reducing the concentration of an absorption solution at the time of a partial load in which a refrigerant solution storage portion 31 and a refrigerant solution discharge portion 33 partitioned by a dam 34 are provided below a heat exchanger 7 in a condenser 3 and a slit 35 is formed in the dam 34 in a vertical direction so that, at the time of a partial load or when the temperature of cold water drops at the time of a partial load, a refrigerant solution in the refrigerant solution storage portion 31 is caused to flow out from the condenser 3 through the slit 35 in the dam 34 to reduce the concentration of the absorption solution.

Abstract: Pipings for joining pumps for delivering absorbent solution and refrigerant with an absorber and an evaporator are eliminated for minimizing the dimensions of the absorber or the evaporator, preventing leakage under pressure, and reducing heat loss and cavitation. Two pumps P2 and P3 for circulating and delivering the absorbent solution in a lower tank 21 are mounted in side-by-side relationship in a recess of a base 23 of the lower tank 21. The base 23 has a space therein for accommodating an impeller 36. The space forms a part of pump chamber communicated to a flow passage 37.

Abstract: An air-cooled absorption-type air-conditioning apparatus in which a simple design allows for heating and cooling and in addition in which freezing is prevented during the heating operation. A liquid coolant from the condenser is dripped onto the inner surface of the outer pipes in the evaporation-absorption chambers and removes the evaporation heat due to evaporation in low pressure. Therefore, the outer pipes are cooled. Overcooling of the outer pipes is prevented by a fan which directs the heat generated at the condenser to the outer pipes. The evaporated coolant is absorbed in the high-concentration liquid on the outer surface of the water pipes and the absorption heat generated by the high-concentration liquid heats the water flowing in the water pipes. A room unit performs the heating or cooling operation by using warm or chilled water circulating in the water pipes.

Abstract: An absorption type refrigerating apparatus which has a high performance coefficient as an entire apparatus by improving the cooling capacities of the condensation function portion and the absorption function portion and can be reduced in size is constituted such that the cooling function portion 1 for cooling the absorption function portion (absorber) 1 by means of the first heat operation fluid (cooling water) 35a is divided into a plurality of sub-portions such as the cooling pipe 201A, cooling pipe 201H and absorption/heat exchanger 234, the flow passages of the first heat operation fluid 35a are connected to these cooling function sub-portions 201A, 201H and 234 in parallel/series like a route formed by the pipe lines 20, 20A, 20D and 21 and a route formed by the pipe lines 20, 20B, 20C and 21, and the cooling capacity of the cooling pipe 201H is increased by forming a continuous irregular surface 1C on the inner wall of the outer shell 1A of the absorber 1.

Abstract: An absorption-type air-conditioning apparatus uses an absorption liquid that is a solution of a liquid coolant and an absorption medium. First and second regenerators are provided for heating the absorption liquid to release coolant vapor and concentrate the absorption liquid. Each of the regenerators includes a respective fin-tube-type heat exchanger in which the absorption liquid flows as it is being heated.

Abstract: An AAATHP is designed to make the non-evaporated liquid refrigerant stemming from the evaporator according to the operational condition of the AAATHP to rectify the refrigerant vapor to be sent to the rectifier from the regenerator, thus improving the efficiency of the rectifier and safely maintaining the operational system of the AAATHP. The AAATHP comprises the following parts: An automatic switch valve to send liquid refrigerant accumulated at the bottom of the evaporator. The heat exchanging pipe enables the liquid refrigerant formed by the evaporator to flow in the rectifier so as to enable the liquid refrigerant sent out by the automatic switch valve to exchange its heat with the refrigerant vapor coming to the rectifier from the regenerator. A first liquid refrigerant passage pipe formed between the automatic switch valve and the heat exchanging pipe sends the liquid refrigerant accumulated at the bottom of the evaporator to the heat exchanging pipe.

Abstract: The invention relates to a device and a method for pre-cooling brewing liquor using a refrigeration device, the said refrigeration device being designed as an absorption-type refrigeration device, and preferably as a LiBr absorption-type refrigeration device, with an evaporator, an absorber, a generator and a condenser, and the generator being operated with surplus process heat produced in the brewery. Use is preferably made of the water vapour heat which is recovered in the copper vapour condenser and which can be subjected to intermediate storage in an energy reservoir.

Abstract: Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use, as the heat transfer medium, the working fluid of the absorption system taken from the generator at a location where the working fluid has a rich liquor concentration.

Abstract: The absorption step of a continuous absorption cycle apparatus (refrigerator or heat pump) is externally cooled by an air-cooled thermosyphon having hot end 107 (FIG. 1), air-cooled end 115, and reservoir 123. The absorption step is further recuperatively cooled by internal fluids, in absorber heat exchanger 108 and/or GAX 109. Thus the absorber is highly compact and the cycle is highly efficient. A hotter hermetic thermosyphon can advantageously supply additional cooling.

Abstract: A desiccant tank storing desiccant is accommodated in a thermal insulation case, and a desiccant tank-side ventilation duct is formed between the desiccant tank and the thermal insulation case. Ventilation path change-over dampers are provided to switch a ventilation path of the desiccant tank-side ventilation duct to an interior heat release operation path or an exterior heat release operation path. A thermal insulation case accommodates a water tank storing water therein and connected with the desiccant tank through a connection pipe without using valves. A water tank-side ventilation duct is formed between the water tank and the thermal insulation case. Ventilation path change-over dampers are provided to switch a ventilation path of the water tank-side ventilation duct to an interior heat absorption/radiation operation path or an exterior heat absorption/radiation operation path.

Abstract: The absorption heat pump device is used in an air conditioner including a desiccant. The absorption heat pump includes a heat pump unit 1 and a heat pump unit 2 to provide heat generated from thermal action of the heat pumps including the heat of condensation of the refrigerant and the heat of absorption from the concentrated solution for heating regeneration air taken from an outside environment and a quantity of heat extracted from a low temperature heat transfer medium to produce an intermediate temperature hot water of about 60.degree..about.80.degree. C. The heat pump device also provides chilled water of about 15.degree. C. temperature, for use in cooling process air. The judicious use of heat provided by the absorption heat pump enables to achieve a high level of energy conservation for performing desiccant assisted air conditioner which operates at high efficiency.

Abstract: An absorption type refrigerator capable of returning an abnormally high temperature of heating water or an abnormally low temperature of cooling water to a normal temperature without stopping or switching the operation of the refrigerator is structured such that return heating water 46b is heated with refrigerant vapor 7a in a heater 41 and is provided to a heating load 310. When the temperature of the heating water 46a becomes abnormally high because the heating load 310 is small or zero, the switch valve V1 is opened to cool part of heating water 46a with part of cooling water 32 for heat radiation so as to reduce the temperature of the heating water 46a to a normal temperature. The heat of the heating water 46a may also be radiated by an air-cooled heat exchanger provided along the passages 44 and 45 of the heating water 46a.

Abstract: The third stage generator of a triple effect absorption apparatus may be operated at vapor pressures below 25 psig and more preferably below 15 psig by using a metal salt concentration in the absorption fluid in the third stage generator of at least 66.5%, by weight.

Abstract: In a triple effect absorption refrigeration system, solution flows from an absorber to first and second generators connected in parallel. Solution exiting the first generator returns to the absorber. Solution exiting the second generator flows to a third generator connected in series with the second generator. Refrigerant vapor from each generator is condensed in a respective condenser. The third condenser exchanges heat with the second generator, and the second condenser exchanges heat with the first generator.

Abstract: A refrigerating system having multiple stages wherein each stage has a boiler for holding a solution of a first constituent being a gas dissolved in a second constituent being a liquid. The boiler communicates with a separator where the gas is separated from the liquid by the heat from the boiler and the gas is then passed to a condenser where it condenses to a liquid. The liquid first constituent passes to an evaporator. In one of the stages, the evaporating first constituent cools the region to be refrigerated in thermal contact with the evaporated of the respective stage. The gaseous first constituent then passes to an absorber where it dissolves in the second liquid constituent that has passed from the separator to the absorber. The solution of first and second constituents now passes to the boiler where the cycle is repeated.

Abstract: A non-diabatic vapor-liquid contact device is disclosed which achieves high heat transfer effectiveness without sacrificing mass transfer effectiveness. Referring to FIG. 2, a helical coil of crested tubing 84 is contained within the annualr space between shrouds 82 and 83. Liquid flows downward through the annulus, and vapor flows countercurrently upward. The mass exchanging fluids pass through the space between tube crests and the shroud, achieving very effective mixing. Heat transfer fluid is flowed through the tubing via connections 87 and 88.The heat and mass transfer is preferably additionally enhanced by interspersing contact media with the coiled tubing, either longitudinally or radially.

Abstract: A method of controlling an absorption type refrigerating apparatus comprising detecting the temperature of the regenerator, limiting the amount of heating in the regenerator for a first predetermined time after the temperature of the regenerator reaches a predetermined temperature, controlling the amount of heating in the regenerator in accordance with a load when the temperature of the regenerator after the passage of the first predetermined time is lower than the predetermined temperature, abnormally suspending the regenerator by distinguishing a normal rise in the temperature of the regenerator caused by a load fluctuation from a rise in the temperature of the regenerator caused by leakage in the apparatus or the like when the temperature of the regenerator reaches the predetermined temperature within a second predetermined time after the passage of the first predetermined time, thereby avoiding repetitions of operation, suspension or limited operation of the regenerator and suppressing the corrosion of th

Abstract: An absorption type refrigerating machine comprising an evaporator, an absorber, a regenerator, and a condenser, all connected by piping to form a refrigerating cycle. The evaporator, condenser or absorber includes a plurality of heat transmission pipes accommodated therein and arranged generally in a horizontal direction. Each pipe has at least one continuity of protrusion on the inner surface thereof extending in an axial direction of the pipe in a spiral fashion and at least one continuity of groove corresponding to the continuity of protrusion formed on the outer surface of the pipe.

Abstract: This invention relates to a pump and refrigeration system including an evaporator from which refrigerant vapor is withdrawn by an absorber and absorbent is recharged by a generator. Further, a condenser is provided between the generator and the evaporator so that refrigerant vapor from the generator can be condensed prior to being returned to the evaporator. In addition, the system is provided with an ejector which is positioned downstream of the evaporator so as to withdraw refrigerant vapor from same and upstream of the condenser so that said withdrawn refrigerant vapor passes through the ejector to the condenser. Thus, in the system of the invention, both an absorber and ejector withdraw refrigerant vapor from the evaporator, thus enhancing the efficiency of the system and further refrigerant vapor passing through the ejector is delivered directly to a condenser, thus reducing the burden of the absorber.

Abstract: Apparatus for mass transfer of gas and liquid flowing through passages therein has a vertical enclosure formed in a pair of sheet metal plates sealed together around their periphery and formed to have rows of horizontal passages communicating with columns of vertical passages in and adjacent to a vertical plane defined by flat contiguous areas of the plates between and around the passages. The inner surfaces of the passages have highly wettable areas to substantially maximize transfer of mass and heat. Each horizontal passage is continuous between the vertical passages with which it communicates.

Abstract: A purge apparatus and method are disclosed for automatically purging an absorption cooling system. Noncondensible gas is drawn out of the absorber of the absorption cooling system by an eductor. The eductor entrains the gas in the fluid flow to the high pressure side of the system. The gas is drawn out of the high pressure side by a separate purge refrigeration system. The evaporator of the purge refrigeration system is located in a purge tank that is in free flow communication with the condenser of the absorption cooling system. Refrigerant vapor and intermixed noncondensible gas flow into the purge tank and the refrigerant vapor condenses on the purge refrigeration system evaporator. The condensed absorption refrigerant is returned to the absorption cooling system. The noncondensible gas collects in the purge tank and blankets the evaporator of the purge refrigeration system, causing the temperature of the purge refrigerant to decrease.

Abstract: A dehumidifier (10) for air comprises an absorption refrigerating apparatus, the evaporator (14) of which being arranged in a first duct (22), through which the air by natural convection flows past the evaporator (14) and is refrigerated by it, so that the humidity in the air condenses on the evaporator (14). An absorber (16) and a condenser (20) of the apparatus are arranged in a second duct (26) and there heat extra air taken in from the room to the second duct (26) through an opening (34) and by natural convection flowing upwards through the second duct (26). An opening (32) is arranged between the ducts (22, 26), through which air which has been refrigerated and dehumidified in the first duct (22) flows into the second duct (26) and is there intermixed with the the flow of said extra air.

Abstract: The present invention provides a single effect or double effect absorption refrigerating machine comprising an absorber, an evaporator, a generator, a condenser, a heat exchanger, a solution pump and a refrigerant pump and wherein the absorber (A), evaporator (E), generator (G) and condenser (C) are disposed within a single housing in such a manner that the absorber (A) is disposed at a lower portion of the housing, the evaporator (E) is disposed aside and above the absorber (A), the condenser (C) is disposed above the absorber (A), and the generator (G) is disposed above the condenser (C), and further wherein a refrigerant gas passage (2) extending from the evaporator (E) to the absorber (A) and a refrigerant gas passage (1) extending from the generator (G) to the condenser (C) are provided between the evaporator (E) and the generator (G).

Abstract: A unit of apparatus for reprocessing concentrated absorbent solution in a closed absorption chiller, for discharge of water refrigerant through an evaporator for heat-in effect from a heat distribution system, and discharge of said absorbent solution reconcentrated thereby for absorption of said water refrigerant after chilling and heat-out effect to a cooling tower, characterized by vapor compression from an evaporator followed by liquification by a condenser with heat transfer from the condenser into the evaporator, increasing solution concentration 1.1% and increased chilling capacity of 23%, with a 7.1% increased coefficient of performance, resulting in a 23% increase in chilling.

Abstract: An absorption refrigerating machine comprising an absorber A, an evaporator E, a generator GH, GL, a condenser C, a heat exchanger XH, XL, and solution circuits 1, 2, etc. and refrigerant circuits 10, 11, etc. for connecting the elements. A concentrated solution is directed from the generators to the absorber A through a solution spray pump P.sub.3 which is provided with a controller 15 for controlling number of revolutions of the pump on the basis of a signal representative of a level of refrigerant liquid detected by a sensor 14 or concentration of solution so as to effect circulation of the refrigerant solution safely and efficiently. The absorption refrigerating machine can be a double effect absorption refrigerating machine wherein a refrigerant gas generated in a high temperature generator GH is used as a heat source of a low temperature generator GL.

Abstract: Absorption-type refrigeration methods and systems are utilized to minimize decomposition of a heat-transfer additive by removing, in generators operating below the additive's thermal decomposition temperature, the additive from the fluid before it reaches portions of the cycle operating above its thermal decomposition temperature. Inverse series and inverse series-parallel connected triple effect methods and systems operate at lower temperatures that minimize decomposition and yield improved performance by reducing the pumping ratio and by decreasing the effectiveness of certain heat exchangers below standard practice.

Abstract: A heat pump system and method utilizes heat of mixing, in addition to the latent heat of solution, to increase cooling ability and thermal performance. The system includes a unique two-phase compressor for compressing a two-component mixture of liquid absorbent-refrigerant solution and superheated vapor to a high pressure. A generator extracts heat from the volume to be cooled by desorption and evaporation of the refrigerant from the high concentration solution in fluid connection with the inlet of the compressor. An absorber releases heat to surroundings by absorbing and condensing refrigerant vapor back into the liquid solution. A throttle valve controls the flow and reduces the pressure of the working fluid is in fluid connection with the absorber and the generator.

Abstract: Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use the working solution of the absorption system for the heat transfer medium. A combination of weak and rich liquor working solution is used as the heat transfer medium.

Abstract: The rate of water vapor sorption of an absorption cycle cooling and/or heating system using an aqueous alkali metal halide or hydroxide solution as the working fluid is increased by adding to the fluid an effective additive amount of at least 2 parts per million of a primary, secondary or tertiary aliphatic, cycloaliphatic, heterocyclic or aromatic amine to the fluid capable of increasing the rate of water vapor absorption.

Abstract: A process and apparatus for absorption heat pumping include supplying heat to a first generator, desorbing vapor from a solution of absorbent and refrigerant in the first generator; in a first absorber, partially absorbing into an absorbent solution the vapor desorbed in the first generator to produce a mixture of vapor and liquid; further absorbing the vapor from the mixture in a second absorber, thereby producing a strong solution and evolving a heat of absorption; vaporizing some of the strong solution by reducing the ambient pressure, thereby extracting heat from a load, supplying absorbent vapor and liquid from the second generator to a third generator to produce more vapor, the third generator receiving the heat of absorption evolved by the second absorber, and leaving a remaining liquid that is pumped to the first absorber; supplying vapor from the third generator to a third absorber in which the vapor is absorbed into an absorbent solution, pumping absorbent solution from the third absorber to the fir

Abstract: An absorption refrigeration machine with two, non-fluid linked loops uses heat from a first loop rectifier to heat a second loop generator by either direct or hydronic heat exchange. Flue gas from the heating of the first loop generator is used to heat strong solution in the second loop. Heat from the first loop condenser and absorber are also used to heat the second loop generator by either direct or hydronic fluid coupling. In order to improve further the efficiencies of the absorption machine, a mass and heat transfer device is used that provides a liquid and vapor distribution system that affords effective heat transfer in conjunction with a large and continually renewed liquid surface area and a relatively constant vapor velocity to effect efficient mass transfer among the various components and processes of the refrigeration machine. A simple liquid metering system is used to meter equal amounts of liquid into the divided liquid flow arrangements used in various components of the machine.

Abstract: Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use the working solution of the absorption system for the heat transfer medium where the working solution has an intermediate liquor concentration.

Abstract: An invert rectifier is provided in which: cooling medium vapor sent from the evaporator is contacted with a weak solution sent from the regeneration unit, and the temperature of cooling medium vapor and the vapor component of absorbent are increased by the action of invert rectification, so that the enthalpy of cooling medium vapor supplied to the vapor-liquid mixer is enhanced. In this invert rectifier, cooling medium vapor is introduced to a lower portion of the container and a residual portion of the weak solution or all weak solution is introduced to an upper portion of the vapor-liquid mixer 16, so that the introduced cooling medium vapor and weak solution are subjected to vapor-liquid contact by the action of an opposed flow. Due to the foregoing, cooling medium vapor is generated, the temperature of which is high, and the amount of the vapor component of absorbent of which is large, so that the enthalpy of cooling medium vapor is enhanced.

Abstract: A liquid vapor absorption system comprises: one or more absorbers, one or more generators, and a fluid loop for directing refrigerant absorption fluid between the absorbers and generators, heat exchangers for selectively functioning as an evaporator or a condenser and cooperating with an indoor coil for recovering thermal energy,a reservoir for condensed refrigerant,a phase-change thermosyphon loop for directing condensed refrigerant from the reservoir to the heat exchange section of an absorber for removing heat of absorption, anda reversing valve means for selectively directing gaseous refrigerant to the heat exchangers functioning as a condenser, and for simultaneously directing gaseous refrigerant from the heat exchangers functioning as an evaporator to the absorber.

Abstract: An absorption refrigeration and heating system has helical concentric coils for two generators (80 and 81) and recuperators (86 and 95) on a common axis (232) with a heating unit (84) at the center and allowing the hot combustion gases (245) to circulate in serpentine fashion through separate concentric chambers containing the coils.An absorber (97), condenser (100) and recuperator (107) are placed in a single module (270) and configured with a tube-in-tube or tube-in-cylinder construction with fluted inner tubes. A general purpose, divided-flow, tube-in-cylinder, heat-transfer device (400) is used to reduce the pressure drop in the circulating fluid.

Abstract: An absorption heating and cooling apparatus includes a generator for separating a dilute solution into a high temperature gaseous refrigerant and a refrigerant-absorbing liquid. The gaseous refrigerant is conducted to an absorber either directly (heating cycle) or indirectly by way of a condenser (cooling cycle). In a heating cycle, the hot gaseous refrigerant fed to the absorber heats a heat exchange fluid (e.g., for heating a room), whereupon the gaseous refrigerant condenses to a liquid. In the cooling cycle, the gaseous refrigerant is condensed into a cold liquid refrigerant in the condenser and is sent to the absorber wherein it cools the heat exchange liquid. In both the heating and cooling cycles, refrigerant-absorbing liquid conducted from the generator to the absorber is mixed with the liquid refrigerant therein following the heat-exchange step.

Abstract: An automobile air conditioning system comprises generally a regenerator, a segregator, a condenser, an evaporator, an absorber, a heat exchanger and a plurality of conduits intercommunicated therein between to form a circulation system producing cooled air. The improvement of this disclosure is characterized with the adaptation of a coil tube wound around the outer periphery of an exhaust pipe and utilizing the residual heat of the waste gas expelled from the engine to vaporize the liquidized refrigerant NH, instead of a compressor. In addition a tubular network is provided to utilize the heat from the sun which is collected on roof and bonnet panels, to strengthen the capability of cooled air production. This invention would release the load of a compressor from the engine and achieve a savings of energy.

Abstract: An absorption cooling system includes an evaporator which receives liquid refrigerant from a condenser and evaporates that refrigerant to produce a cooling effect. The gaseous refrigerant produced by evaporation in the evaporator is supplied to an absorber which mixes that gaseous refrigerant with concentrated liquid refrigerant received from a generator to produce a dilute refrigerant solution. The dilute refrigerant solution is delivered from the absorber to the generator and is separated into a gaseous refrigerant and a concentrated liquid refrigerant. The gaseous refrigerant from the generator is passed through a heat exchanger and transfers heat to the cooler dilute refrigerant traveling from the absorber to the generator. Some of the gaseous refrigerant is condensed in the heat exchanger and is supplied to the evaporator, while the remaining uncondensed refrigerant is supplied to the condenser.

Abstract: A refrigeration and heating system in which an absorber (97), condenser (100) and recuperator are placed (107) in a single module (270) and are provided with tube-in-tube or tube-in-cylinder construction with fluted inner tubes. A general purpose, divided-flow, tube-in-cylinder, heat transfer device (400) is used to reduce the pressure drop in the circulating fluid.

Abstract: The capacity control range of an interior unit of a multiple type absorption air conditioning system is increased, and turning on and off of cooling/heating and switch over between the cooling and heating can be readily and safely performed. The capacity control range is increased by reserving a liquid refrigerant in an absorption cool/warm water unit. An interior unit is connected to the absorption cool/warm water unit by a communication device. The operation of the cool/warm water unit caused by turning on and off the system and switch over between cooling and heating are automatically controlled by an operation control device. Consequently, the operation is simplified, and safety is improved.

Abstract: An absorption chiller having a generator absorber heat exchanger with a split device for directing a first portion of strong solution from the absorber to the generator at a first temperature, while simultaneously directing a second portion of strong solution from the absorber to the generator at a second temperature. The absorption chiller operates to transfer weak solution from the generator to the absorber at a temperature of about 265.degree. F., while transferring strong solution from the absorber to the generator at two different temperatures--preferably about 210.degree. F. and about 240.degree. F.

Abstract: In an absorption chiller comprising at least two chiller modules connected to each other and a method therefor in which an evaporator, an absorber, a condenser, a low-temperature generator, a high-temperature generator, a heat exchanger, an absorption solution pump and a refrigerant pump are functionally connected to one another, and gas, oil, vapor or exhaust gas discharged from a gas turbine, a diesel engine or another process is used as a heat source for the low-temperature generator or the high-temperature generator, the at least two chiller modules are connected to each other such that chilled water flows through the respective chiller modules in series while cooling water flows through the respective chiller modules in parallel, and that directions of flow of the chilled water and the cooling water are longitudinally reverse to each other in at least one chiller module which includes a final outlet for the chilled water, and, in the absorber of each chiller module, absorption solution is sprayed in at l

Abstract: A dual circuit absorption refrigeration system comprising a high temperature single-effect refrigeration loop and a lower temperature double-effect refrigeration loop separate from one another and provided with a double-condenser coupling therebetween. The high temperature condenser of the single-effect refrigeration loop is double coupled to both of the generators in the double-effect refrigeration loop to improve internal heat recovery and a heat and mass transfer additive such as 2-ethyl-1-hexanol is used in the lower temperature double-effect refrigeration loop to improve the performance of the absorber in the double-effect refrigeration loop.

Abstract: A simple heat cascading regenerative sorption heat pump process with rejected or waste heat from a higher temperature chemisorption circuit ("HTCC") powering a lower temperature physisorption circuit ("LTPC") which provides a 30% total improvement over simple regenerative physisorption compression heat pumps when ammonia is both the chemisorbate and physisorbate, and a total improvement of 50% or more for LTPC having two pressure stages. The HTCC contains ammonia and a chemisorbent therefor contained in a plurality of canisters, a condenser-evaporator-radiator system, and a heater, operatively connected together. The LTPC contains ammonia and a physisorbent therefor contained in a plurality of compressors, a condenser-evaporator-radiator system, operatively connected together. A closed heat transfer circuit ("CHTC") is provided which contains a flowing heat transfer liquid ("FHTL") in thermal communication with each canister and each compressor for cascading heat from the HTCC to the LTPC.

Abstract: An absorption refrigerator is characterized by an absorber which has a tube bank of heat-conductive tubes in the absorber, a vapor flow passage between the tube bank and a side wall of the absorber which is opposite to and separated from the tube bank in a radial direction of the heat-conductive tubes by a distance equal to or larger than a maximum pitch of the heat-conductive tubes, at least a baffle plate disposed in the vapor flow passage, and a gas extraction port disposed outside the tube bank. A further arrangement is characterized by an absorber having a tube bank in the absorber, a vapor flow passage between the tube bank and a side wall of the absorber, and a gas extraction port disposed around a central portion of the tube bank.

Abstract: The basic apparatus of the invention is a triple effect absorption cycle apparatus, comprising first, second and third generators each containing an aqueous absorption fluid and operating at successively higher temperatures; first, second and third condensers operating at successively higher temperatures, and operatively communicating with the generators; first heat exchange means cooperating between the third and second generators, and between the second condenser and first generator, for directing energy therebetween; one, two or three absorbers and one, two or three fluid loops for directing aqueous absorption fluid between absorbers and second heat exchange means for exchanging energy between aqueous absorption fluid flows in said loops; and one, two or three evaporators operatively communicating with the absorbers.