Abstract: An absorption heat pump including a generator or desorber which generates vapour from a first fluid fed to a first condenser, an evaporator provided downstream of the condenser, an outlet of the evaporator connected by a third line to an inlet of a mixer of a low pressure absorber connected to a suction side of a pump feeding solution to the generator. The generator having a poor solution outlet connected by a sixth line provided with at least one lamination valve to a poor solution inlet feeding the absorber. The second line is brought into heat exchange contact with the low pressure absorber and opens into a liquid/vapour separator feeding the evaporator via a third line, the vapour outlet of the separator opening into an intermediate pressure absorber unit.

Abstract: A hybrid storage absorption refrigeration system and method. The system includes a thermal collector, a condenser, an evaporator, a cold storage tank, an absorber, a weak solution tank, a strong solution tank, a refrigerant storage tank, a refrigerant heat exchanger, and a solution heat exchanger. The method includes providing heat from a thermal collector to produce a refrigerant vapor from strong solution, condensing the refrigerant vapor, producing a refrigeration effect in an evaporator, chilling a cold storage medium in a cold storage tank, combining refrigerant vapor with weak solution in an absorber to produce strong solution, storing weak solution, storing strong solution, storing refrigerant, exchanging heat between hot and cold refrigerants in a refrigerant heat exchanger, and exchanging heat between weak solution and strong solution in a solution heat exchanger.

Abstract: The present invention provides an improved control system and method for the absorption refrigeration process. The system includes sensors that measure the absorption process in order to determine if the absorption cycle is continuous. A control unit in communication with the sensors which compares the measured sensor values to predetermined safe limits. When the control unit determines that safe limits have been exceeded, the control unit communicates with actuators adjusting the absorption cycle heat source, ultimately protecting the absorption refrigeration process from damage. Further, the control may reestablish the absorption cycle heat source when predetermined safe operation conditions are detected.

Abstract: The system uses a batch method process absorption cooling through a number of separate sealed two compartment containers which are moved physically between a heating area, a cooling area, a storage area and a refrigeration area. Pressure differentials alone between the two sections of a vessel power refrigerant movement and evaporation of refrigerant. A valve separates a refrigerant collector and evaporator section from an absorber/desorber section allowing the absorbent and refrigerant to be kept separate until needed. This system can be used with either ammonia water mixtures or with lithium bromide water mixtures.

Abstract: Improved structures of cooling systems that may be used in air conditioning or refrigeration are described. To achieve a high efficiency in converting cooling effect from one or more cooling units, antifreeze liquid used to absorb the cooling effect is forced to pass through a box or container made out of graphite or thermally conductive metal or alloy holding a sponge-like structure or foam, also made out of graphite or thermally conductive metal or alloy, where the foam including open cells provides maximum surface contact with the liquid. Further the liquid is sprayed or vaporized onto the foam and passes through the foam by gravity or pressure. The cooled liquid is exited from the container for use in air conditioning or refrigeration.

Abstract: The present invention relates to a process by which a dried carboxylic acid cake is obtained from a slurry or cake carboxylic acid product through the use of at least one counter current wash. More specifically, the present invention relates to a process by which a dried terephthalic acid cake suitable as a starting material for polyester or co-polyester production is obtained from a slurry or cake terephthalic acid product through the use of at least one counter current wash.

Abstract: To provide a highly efficient and compact absorption refrigerating machine with water heated from 60 to 70 degrees Celsius as the heat source. In an absorption refrigerating machine including a regenerator G, condenser C, an absorber A, an evaporator E, an auxiliary regenerator GX and an auxiliary absorber AX, the concentrated solution from G is heated and further concentrated in GX, while the diluted solution from A is cooled in AX, the refrigerant vapor from GX is absorbed. A low temperature heat exchanger XL is provided for heat exchange between the concentrated solution supplied from GX to A, and the diluted solution sent from AX to G, and a high temperature heat exchanger XH is provided for heating the diluted solution leaving from XL and sent to G with the concentrated solution supplied from G to GX.

Abstract: There is provided an exhaust-heat using refrigerating system which can add the function of refrigerant heater, condenser or super-cooler by using exhaust heat. The system comprises a heat pump apparatus 1 equipped with a compressor 12, a first heat exchanger 14, a pressure-reducing device 15 and a second heat exchanger 21, and an absorption type refrigerating machine 5 equipped with a regenerator 51 using exhaust heat as a heat source, a condenser 53, an evaporator 54 and an absorber 55. A third heat exchanger 17 is connected to the first heat exchanger 14 in parallel, and the heat source of the third heat exchanger 17 is achieved from the evaporator 54 of the absorption type refrigerating machine.

Abstract: A filter system for an absorption chiller includes a replaceable filter element, a plateable member, and a sacrificial member. The filter receives a weak solution from the chiller's evaporator, receives a stronger solution from the chiller's absorber, and discharges a mixture of the solutions to the chiller's generator. Conveying the weak solution to the filter system avoids creating an accumulation of lithium bromide in the evaporator and helps dissolve or flush inhibitors from the filter element on a continuous basis. Combining the weak and stronger solutions in the filter system attempts to confine a corrosion or copper oxide plating process to an area of the chiller that can be readily serviced. The plateable member and the sacrificial member provide replaceable or consumable members used in the corrosion or plating process.

Abstract: Each of the water dispense pipes 46 in a dual pipe unit has nozzle 46a in an area starting just before the evaporating/absorbing compartment 43 and extending to its distal end. The nozzle 46a is a means by which the portion of the circulation pipe that is located upstream of the nozzle and which is exposed to elevated temperature is isolated from the evaporating/absorbing compartment filled with a low-temperature and pressure atmosphere. As a result, the streams of refrigerant water coming from the distributor 45 are suppressed by the nozzles at the distal ends of the individual water dispense pipes so that the liquid pressure becomes uniform among those distal ends, from which the refrigerant water is dispensed into the evaporating/absorbing compartment at a generally uniform pressure.

Abstract: The desiccant assisted air conditioning apparatus can provide a stable operation and a higher energy efficiency. The apparatus comprises a process air passage for flowing process air for dehumidification through a desiccant and for delivery to a conditioning space and a regeneration air passage for flowing regeneration air for removing moisture from the desiccant. An absorption heat pump means for providing cooling heat source for the process air and heating heat source for the regeneration air is provided which comprises an evaporator, an absorber, a generator, a condenser and fluid passages therebetween for forming an absorption refrigeration cycle. The absorption heat pump means is provided with a heat exchanger in a refrigerant passage between the condenser and the evaporator for cooling a refrigerant flowing through the refrigerant passage by heat exchange with a heat transfer medium.

Abstract: An improved regenerative absorption refrigeration cycle having a high COP and a commercially practicable pumping system. In the basic cycle, an ammonia/water solution is boiled in an externally-heated generator (11). The boiled-off ammonia vapor is cooled (14) in a regenerator (16), condensed (28), expanded to low pressure (32), and boiled in an evaporator (34) to extract heat from fluid circulating to and from a cooling load (41). The low-pressure liquid ammonia returns (46) to the regenerator (16) and is absorbed back into the low-pressure water from the generator. The solution is then cooled in a low-pressure absorber (50), pumped (53) to a high-pressure conduit (57) which is heated by the regenerator heat before going back to the generator 11. The improved cycle uses at least one intermediate absorber stage 60 to absorb more ammonia vapor (69, 71) into the solution coming from the lower pressure absorber (50) to produce a cooled solution of higher ammonia concentration.

Abstract: An improved process and apparatus for absorption cooling in which an absorbent-refrigerant solution from an absorber is heated in a generator producing absorbent-refrigerant vapor, the absorbent-refrigerant vapor is separated and condensed producing pure liquid refrigerant and an absorbent-enriched solution, the absorbent-enriched solution is returned to the absorber, the pure liquid refrigerant is evaporated producing pure refrigerant vapor, and the pure refrigerant vapor is absorbed into the absorbent-enriched solution. A dilute absorbent-refrigerant solution and a concentrated absorbent-refrigerant solution are generated simultaneously in a solution concentration means disposed between the absorber and generator. The dilute absorbent-refrigerant solution is heated to produce a first pure refrigerant vapor and the absorbent-enriched solution. The first pure refrigerant vapor is condensed in the generator in thermal contact with the absorbent-enriched solution producing pure liquid refrigerant.

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 method of operating an absorption refrigeration system. The system has high- and low-pressure sections. The sections are connected by three lines and have an evaporator for subcooling the liquified refrigerant before it enters a connecting line. To enable uninterrupted transport of the weak refrigerant solution without increasing prime cost, the refrigerant vapor is fed from a subcooler into the expanded weak refrigerant solution at one or more points and a connecting line that conveys the weak refrigerant acts as an absorber. Expanded and evaporating refrigerant fluid flows through a subcooler in the high-pressure section. A condenser is in a line that conveys the weak refrigerant solution. The exit from the subcooler communicates through another line downstream of an expansion valve with a line that conveys the weak refrigerant solution and acts accordingly as an uncooled absorber.

Abstract: A method of operating a monovalent alternative absorption heating plant an apparatus operated by this method in which above a predetermined ambient temperature, the system is operated in a heat pump mode and at lower temperatures, in a direct heating mode. The system uses a coolant (refrigerant) circulation path in which the coolant is driven out of a solvent enriched with the coolant, is liquefied, is vaporized by heat exchange with the environment and is absorbed by coolant-poor solvent. The system also has a heat carrier circulation in which the heat carrier is heated by heat exchange with the continuing coolant and thus takes up absorption heat. According to the invention, in the direct heating mode, the heat carrier bypasses the coolant condenser and absorber and is passed through a heat exchanger separate from the coolant condenser and is there heated directly by combustion heat in a heat generator or by heat exchange with the coolant-poor solvent.

Abstract: Evaporation device with an expansion component which may be a capillary or series of orifices of increasing cross-sectional area, an insulated housing, a coil within the housing for conducting a material to be cooled by the evaporation of liquid refrigerant, a separation component for receiving refrigerant from the expansion component and separating liquid refrigerant from gaseous refrigerant and directing liquid refrigerant over the coil, an outlet for receiving gaseous refrigerant from the separation component and from over the coil, and a storage element within the housing beneath the coil for collecting liquid refrigerant not evaporated by passage over the coil. Preferred evaporation devices also include a precooler and a liquid refrigerant outlet which permits controlled liquid refrigerant outflow.

Abstract: An alcohol reclaiming apparatus for use in an absorption refrigeration system having a separator operatively connected to the system condenser for removing alcohol from liquid refrigerant prior to passing the refrigerant from the condenser section to the evaporator section of the system. The separated alcohol is delivered directly into the system absorber, thereby bypassing the evaporator, to promote continuous circulation of alcohol through the system whereby the performance of the system is maintained at a relatively high level.

Abstract: An alcohol circuit for use in an absorption refrigeration system for circulating alcohol through the system along an independent path of travel which prevents the alcohol from stagnating within the evaporator section of the system. Further means are provided to precondition the alcohol prior to its introduction into the absorber section to enhance the effective use of this additive within this section.