Abstract: A high temperature regenerator of an absorption type hot and cold water generator and an absorption type hot and cold water generator capable of preventing corrosion from occurring by preventing local overheating at the heat transfer surface of the high temperature regenerator and capable of being miniaturized. The high temperature regenerator includes an outer case, an inner case, a plurality of solution pipes, a burner, a solution flow-in pipe, and a gas/liquid separation plate. The inner case is inside the outer case, and a solution is kept between the cases, with the inner case being submerged within this solution. The burner is mounted on the side of the outer case in such a way that heat can be supplied through the inner case, with the inside of the inner case serving as a combustion chamber.

Abstract: A cooling energy generator with a cooling energy accumulator comprises a refrigerant, absorbent liquid, and a container having a first chamber receiving the absorbent liquid, a second chamber receiving the liquid refrigerant and a vapor passage communicating with a space over the absorbent liquid in the first chamber and with a space over the liquid refrigerant in the second chamber. The absorbent liquid is sprayed in the first chamber, and the absorbent liquid is cooled during an accelerated cooling operation. The absorbent liquid is heated during the cooling energy accumulation operation, and liquid refrigerant is sprayed in the second chamber during the accelerated cooling operation and during the normal cooling operation. An air conditioning heat exchanger supplies the cooling energy to a cooling device for air conditioning, and a heat pump is provided.

Abstract: A double effect air cooled absorption refrigerating machine consisting of fans provided on one side frame member out of the upper, lower and four side frame members which constitute a frame of a machine body, an air cooled heat exchanger provided on the remaining three side frame members and composed of an air cooled absorber and an air cooled condenser, and an evaporator, a high-temperature regenerator, a low-temperature regenerator, a solution heat exchanger and some other parts, all of which are provided on the inner side so as to be surrounded by the side frame members, the machine having a small installation area.

Abstract: A method for producing a heat transfer tube for single-phase flow having rows of discontinuous projections formed on the inner surface thereof along one or more spiral curves. Each projection has a circular, elliptic or a similar cross-section constituted by smooth curves at any desired height including the bottom thereof. The cross-sectional area of the projection progressively decreases towards the top of the projection.

Abstract: The present invention relates to a louvered heat transfer fin in which the air-passing resistance of the louver is varied so as to increase the overall heat exchange quantity, and thereby to greatly enhance the heat transfer performance of the fin. The arrangement of each louver is such that the projection area in the vicinity of the longitudinal central portion of the louver projected in the direction in which air passes is larger than the projection area of each of the longitudinal end sides of the louver projected in the same direction.

Abstract: A centrifugal compressor for use in turbo-refrigerators, for example, has a motor casing frame section in which a drive motor is accomodated and a gear casing frame section in which a multiplying gear mechanism is accomodated. The multiplying gear mechanism is connected at its input side with the drive motor and at its output side with an impeller. The mechanism has a first shaft including a rotor shaft of the drive motor and a gear shaft carrying a multiplying gear and separably connected directly with the rotor shaft, a second shaft mounting the impeller and having a pinion meshing with the speed multiplying gear, and bearings mounted on bearing casing frame sections for supporting the first and second shafts at their opposed ends, respectively. The motor casing frame section, gear casing frame section and bearing casing frame section are integrally formed as a unitary body.

Abstract: A heat transfer tube has at least a row of projections provided on its inner surface at regular intervals along a spiral curve thereof. The row of projections are formed by plastic deformation of part of the heat transfer tube, which is effected by pressing a rolling disc having projections against the outer surface of the heat transfer tube. The projections have smooth curved surfaces. The height of the projections ranges from 0.45 mm to 0.6 mm, their pitch along the spiral curve ranges from 3.5 mm to 5 mm, and their pitch in the axial direction ranges from 5 mm to 9 mm.

Abstract: A heat transfer tube for single-phase flow having rows of discontinuous projections formed on the inner surface thereof along one or more spiral curves. Each projection has a circular, elliptic or a similar cross-section constituted by smooth curves at any desired height including the bottom thereof. The cross-sectional area of the projection progessively decreases towards the top of the projection.

Abstract: An air-cooled absorption refrigeration system wherein refrigerant vapor is introduced into a vertical tube absorber at the top and bottom, or top, bottom and center thereof so as to allow the refrigerant vapor to flow into the absorber at different scattered positions whereby a sufficient flow passage area for the refrigerant vapor is smoothly secured and the refrigerant vapor is received by the absorber.

Abstract: A method of producing a heat transfer wall, including a plurality of minute tunnels parallelly extending and spaced a minuscule distance from each other under an outer surface of the wall in contact with liquid, and a plurality of tiny hole portions formed at the outer surface of the wall above the tunnels and located at regular intervals along the tunnels to maintain same in communication with the outside. Each hole portion includes a projection located in the hole portion including a hole itself and extending from the vicinity of the hole portion into the hole portion in a manner to traverse same, so that a flow of liquid into the tunnels and a flow of vapor out of the tunnels can be optimally regulated by the projections to enable the heat transfer wall to exhibit a high heat transfer performance.

Abstract: Disclosed is a compact compressor refrigerating machine, particularly a turbo-refrigerating machine which uses a turbocompressor, having a motor, a set-up gear, a compressor, a condenser, a pressure reducing means, and an evaporator. A vapor-liquid separator having a first opening on the bottom wall thereof and second and third openings on the side wall thereof is installed on the evaporator in such a manner that the vapor-liquid separator communicates with the evaporator through the first opening. The compressor is connected to the side wall of the vapor-liquid separator so as to communicate the second opening with the suction passage of the compressor and the third opening with the discharge passage of the compressor, respectively. A separation element is disposed in the vapor-liquid separator so as to cross the flow of the refrigerant vapor which flows from the first opening toward the second opening.

Abstract: An air cooling type absorbing cooler provided with an air cooling type absorber having a structure in which, in cooling the absorbing solution and the refrigerant vapor by air, the absorbing solution and the refrigerant vapor on the inlet side of the absorber are cooled by the cooling air on the outlet side of the absorber, while the absorbing solution on the outlet side of the absorber is cooled by the cooling air on the outlet side. By causing the absorbing solution sprayed into the absorber to flow downward and the air for cooling the absorbing solution and the refrigerant vapor to flow upward, the absorbing solution having a temperature which is approximately equal to the outlet temperature of the absorber is cooled by the air which has a temperature approximately equal to the inlet temperature of the cooling air. The absorbing solution supplied from the absorber is cooled by the refrigerant vapor evaporated by the evaporator.

Abstract: In a shift converter for catalytically converting carbon monoxide and steam to carbon dioxide and hydrogen through exothermic reaction in a phosphoric acid fuel cell apparatus, the heat generated at the shift reaction is absorbed in vaporization of a liquid in a vessel provided with a reactor tube as a heat source. The catalytic exothermic reaction is carried out with cooling in the present invention, and thus it is not necessary to provide coolers at a plurality of stages in contrast to the conventional shift converter.

Abstract: The present invention is provided with an evaporator, a primary absorber, a plurality of generators, a condenser and a direct contact type heat exchanger which is provided with auxiliary evaporator-absorber stages in a plural set. These evaporator-absorber stages in a plural set are divided into a plurality of groups and connected so that a solution is sent from the final absorber stage of each group into each generator. By this construction, the solution in a first generator of a plurality of generators can be made to work at a lower level of temperature than usual.

Abstract: A cooling system including a compression refrigeration unit and an absorption refrigeration unit, with the compression refrigeration unit including a compressor having a capacity control mechanism; a condenser for cooling and condensing a compressed refrigerant gas through a heat exchange between the refrigerant gas and a cooling medium circulated through the condenser; and an evaporator into which the condensed refrigerant is introduced through an expansion means so as to be evaporated and cool a medium by the latent heat derived from evaporation.

Abstract: A dilute solution producing system of an absorption refrigerating apparatus wherein spraying of a solution and absorption of a refrigerant gas into the solution take place in a plurality of stages to produce a solution of low concentration. A solution of high concentration is sprayed in a zone of cooling water of high temperature in an absorber and the refrigerant gas is absorbed into the sprayed solution to produce a solution of intermediate concentration, and the solution of intermediate concentration is sprayed in a zone of cooling water of low temperature and the refrigerant gas is absorbed into the sprayed solution to produce a dilute solution as desired.

Abstract: An absorption refrigerator of double effect type in which at a portion at which a weak solution transported from an absorber to a generator of the absorption refrigerator and a strong solution transported from the generator to the absorber flow in parallel with each other there are provided direct contact type heat exchanging means for flashing the strong solution to produce gaseous refrigerant and absorbing the gaseous refrigerant into the weak solution and the heat exchanging means includes a flash type heat exchanger in which a flash tank and an absorption chamber are disposed adjacent to each other in a pair.

Abstract: An arrangement of an evaporator, an absorber, a generator and a condensor within a shell of a single effect absorption type refrigerator or a multiple effect absorption type refrigerator, such as a double effect or triple effect type refrigerator. Positioned on opposite sides within the shell are an evaporator and a generator, and disposed therebetween are an absorber and a condensor. This arrangement presents an improved efficiency in terms of space to provide a compact type refrigerator.

Abstract: A centrifugal compressor for use in turbo-refrigerators, for example, has a motor casing frame section in which a drive motor is accomodated and a gear casing frame section in which a multiplying gear mechanism is accomodated. The multiplying gear mechanism is connected at its input side with the drive motor and at its output side with an impeller. The mechanism has a first shaft including a rotor shaft of the drive motor and a gear shaft carrying a multiplying gear and separably connected directly with the rotor shaft, a second shaft mounting the impeller and having a pinion meshing with the speed multiplying gear, and bearings mounted on bearing casing frame sections for supporting the first and second shafts at their opposed ends, respectively. The motor casing frame section, gear casing frame section and bearing casing frame section are integrally formed as a unitary body.