Abstract:
A rotary regenerative heat wheel having a heat exchange matrix comprised of a spirally wound strip of plastic having a coating of dry desiccant affixed thereto. The quantity of desiccant affixed to the strip is selected so that the sensible and latent heat transfer efficiencies of the wheel are relatively high and approximately equal. An apparatus and method are disclosed for applying a desiccant coating to a sheet of plastic.
Abstract:
The procedure to prevent the formation of condensation on tools that are heated in use and are cooled by a circulated coolant is particularly relevant to plastic moulding machines. To avoid the build-up of condensation from dampness on the cooled tools a dry air veil, as herein laid down, is produced by direct blowing-on of the tools, through which the cooling water temperature of the circulated coolant in the tools can be further reduced making shorter work cycles possible. By use of a special control equipment, the dew point on the tool surface is picked up which regulates the cooling water temperature accordingly.
Abstract:
Dehumidification apparatus is disclosed, as is a dehumidification method. The apparatus comprises a material, for example a laminate which is commercially available under the trade designation "Sanwet Sheet 4000", which is operable to remove water vapor from air circulated in contact therewith without releasing the latent heat of vaporization of the water removed, means for circulating air to be delivered to a space to be conditioned in contact with the material, means for circulating regenerating air in contact with the material, and means for heating circulated regenerating air before it contacts the material. The method comprises circulating air to be dehumidified in contact with such a material, interrupting the circulation of air to be dehumidified in contact with the material, circulating heated regenerating air in contact with the material, separating the heated air and water released thereto from the material and carrying out the foregoing steps repeatedly.
Abstract:
A dehumidifying apparatus including a carousel ring with a plurality of axial modular desiccant beds, separated from each other, in which the modular beds are cyclically shifted from the process to the regenerating to the process conditions as the carousel ring rotates about a central axis.
Abstract:
A heat exchanger apparatus includes a cylindrical-shaped heat exchanger formed by alternately laminating first and second elements in the circumferential direction of the cylindrical-shaped heat exchanger. The cylindrical-shaped heat exchanger is rotated to carry out the function of the conventional regenerative rotary type total heat exchanger. In addition, the first and second elements are also allowed to effect a heat exchange or total heat exchange operation. The cylindrical-shaped heat exchanger is either hollow or solid, which provides many variations in arrangement of air ducts for primary and secondary air flows. Further, a partition interposed between the first and second elements has variation in property: permeable to water vapor; non-permeable to water vapor as well as non-hygroscopic; and so forth. The first and second elements exchange heat with each other in a total heat exchange operation mode and a sensible heat exchange operation mode.
Abstract:
Disclosed is a method of operating adsorption beds of the type which are regenerable with heat and a bed which exploits the method. By altering the timing of the beginning and termination of the adsorption stage, the regeneration stage, and the cooling stage, it is possible to significantly reduce energy consumption, increase the throughput of the bed, provide greater security against breakthrough, produce a more adsorbate-free product, or attain certain combinations of these advantages.
Abstract:
A heat exchanging element for use in a rotary-type counter-current heat exchanger is provided. The heat exchanging element comprises a gathering member composed of natural fiber, especially coconut fiber. And a rotary-type counter-current heat exchanger is provided. The heat exchanger comprises a casing, a rotary frame rotatably supported by the casing, the rotary frame having a shaft, a pair of rotor rims maintaining a predetermined distance in an axial direction of the shaft and a plurality of rotor spokes, and the heat exchanging element accommodated in the rotary frame.
Abstract:
The transfer elements of the rotor of a regenerative heat and humidity exchanger are made of a non-hygroscopic material, such as aluminum, the surface of which is treated to form a hygroscopic layer thereon. This provides the benefits in humidity transfer previously obtained with all-hygroscopic transfer elements such as paper, cardboard or asbestos, without the danger of fire in the use of paper or cardboard or the danger to health in the use of asbestos. Preferably the transfer element is of metal on which a hygroscopic surface layer is formed by oxidizing the surface by pickling and/or heat treatment, and preferably the oxide layer is impregnated with a substance, e.g. lithium chloride, to render it more hygroscopic. Preferably also, the layer is made more porous by acid treatment prior to oxide formation, and acid treatment may be used after the pickling process to arrest the pickling reaction promptly.
Abstract:
A method of manufacturing a contact body is disclosed wherein the contact body is built up of thin layers of hydrated asbestos fibers shaped between mutually spaced support positions to form channels extending from end to end of the contact body. The layers have a coating thereon of at least one inorganic substance and the layer body is heated to at least the dehydration temperature of the asbestos, at which the water of crystallization is released by passing a current of hot gas through the channels in the contact body for a relatively short period of time in order to effect the intended action on the body.
Abstract:
A process and apparatus for the removal of carbon dioxide from a gaseous stream, wherein the CO2 content ranges from trace amounts up to 50 mole percent, and for subsequent transfer to another gas stream by thermal regeneration. A special composition comprising a finely ground mixture of potassium carbonate and alumina, which has synergistic properties, is used as the absorbent. In a preferred apparatus embodiment, the mixture is incorporated into a rotary regenerative wheel.