摘要:
A mass and heat transfer device uses a substantially vertical surface to separating a first fluid space from a second fluid space with the first fluid space containing a downward flowing liquid in at least a partially flooded state and an upward flowing gas contained at least partially within the downward flowing liquid. A fluid distribution surface with one or more apertures is provided within the first fluid space with the apertures controlling the downward passage and distribution of the downward flowing liquid and the upward passage and distribution of the upward flowing gas. A heat transfer fluid is used in the second fluid space for heat transfer with fluids in the first fluid space. The fluid distribution surface can be used in a horizontal, vertical or angled position and in annular, cylindrical, and hexahedral forms. The mass and heat transfer device is especially compact when sheet metal plates and frames are used as enclosures for the first and second fluid spaces and is especially useful when used as absorbers, condensers, desorbers, and evaporators in an absorption refrigeration machine.
摘要:
A liquid outlet pipe extended from a lower end of a liquid storage reservoir 420 is communicated with a section in the proximity of a lower portion of a refrigerant liquid dispersing pipe 421. A plurality of liquid outlet holes 426 are provided on an upper surface of the refrigerant liquid dispersing pipe 421. Diameters of the liquid outlet holes 426 are differently determined depending on a distance between a communicated section of the liquid dispersing pipe 421 and the liquid storage reservoir 420, in order to equalize an amount of refrigerant liquid flowing from the outlet holes 126. When the liquid storage reservoir 420 is filled with the refrigerant liquid, the refrigerant liquid flows upward within the liquid dispersing pipe 421 so as to inject the refrigerant liquid in accordance with a liquid head pressure. This equalizes the amount of the refrigerant liquid injecting from each of the liquid outlet holes 426, and flowing along an entire area of an evaporation coil 41 evenly so as to significantly ameliorate an evaporation capability.
摘要:
The absorber for use in absorption chillers of the present invention comprises a plurality of cooling water pipes 2 extending horizontally in the interior of the absorber chamber. A plurality of flat heat transfer plates 1 are spaced apart from one another and arranged horizontally in a vertical position, and the plurality of cooling water pipes 2 extend through these heat transfer plates 1 perpendicular thereto. The pitch Pd of the plates 1 is 3 to 15 mm. Each heat transfer plate 1 is integrally formed on its upper end face with an absorbent receptacle 10 V-shaped in cross section and extending longitudinally of the upper end face. The bottom portion of the receptacle 10 is formed with two rows of absorbent holes 11 positioned upwardly of respective surfaces of the plate 1. The holes 11 of each row are spaced apart from one another longitudinally of the plate 1 and each have an outlet adjoining the surface of the plate 1. This enables an absorber to have a higher absorbing capacity than conventional absorbers.
摘要:
An absorption diffusion type refrigerating structure comprises a generator, a rectifier, a condenser, an evaporator, a concentrated ammonia aqueous solution tank, and an absorber. The absorber is vertical. A spiral device is disposed in the absorber to lengthen the flow path of diluted ammonia aqueous solution, to extend the time of diluted ammonia aqueous solution in the absorber, and to expand the reaction area of diluted ammonia solution in the absorber, thereby reducing the whole weight, shrinking the volume, and enhancing the refrigerating speed. An ammonia liquid pipe and a hydrogen pipe are arranged in the evaporator. The evaporator has a simple and symmetrical shape, and can be processed and assembled easily, hence saving the space thereof. Moreover, because the ammonia liquid pipe and the hydrogen pipe are arranged in the evaporator, the effect of heat exchange thereof is better, and the refrigerating temperature is lower.
摘要:
A liquid distributor, a falling film heat exchanger and an absorption refrigerating machine, which are inexpensive and favorably ensure uniform distribution of a liquid even in the case where the liquid distributor is installed in oblique position and foreign matters such as metal particles or the like are mixed in the liquid. The liquid distributor comprise a primary distribution duct of box-shaped cross section having an opening serving as a liquid inlet, and distribution holes serving as liquid outlets and formed on side surfaces of the primary distribution duct, and a group of box-shaped secondary distribution trays spaced from outer side surface and lower side surface of the primary distribution duct, and formed to be compartmented into a plurality of regions in a longitudinal direction of the primary distribution duct. Liquid dripping holes, through which the liquid is dropped, are formed in bottom surfaces of the secondary distribution trays. The liquid distributor is incorporated in falling film heat exchangers or absorption refrigerating machines.
摘要:
An absorber and evaporator combination for use with an absorption heat pump (including chillers and air conditioners) as well as with other apparatus in which a vapor is absorbed by a liquid absorbent or a liquid or gas is cooled by evaporative cooling is disclosed. The absorber and evaporator are designed as vertical plates that can receive films of either absorbent (on the absorber) or refrigerant (on the evaporator) flowing down them. A liquid refrigerant is distributed across the top edge of each vertical surface of the evaporator. Likewise, for the absorber, a liquid absorbent is distributed across the top edge of each vertical surface. The distributors for the refrigerant and the absorbent are constructed and arranged so that they distribute their respective liquids without creating droplets. In one embodiment, two vertical evaporator surfaces and two vertical absorber surfaces are assembled into one absorber/evaporator panel. The two evaporator surfaces are positioned facing each other but with a small space between them. The two absorber surfaces are similarly positioned facing each other. A single hollow panel is formed by (1) sealing the two opposed evaporator surfaces along their top and bottom edges and along one side edge, (2) sealing the two opposed absorber surfaces along their top and bottom edges and along one side edge, and (3) joining the two absorber surfaces with the two evaporator surfaces along their unsealed side edges in a way that forms a single hollow panel that is enclosed on all sides.