Abstract: A closed intermittent process for drying a moist material, in which process gas is circulated internally for transporting vapour formation heat and water vapour out of the material, the water vapour being condensed from a cooled mixture of gas and water vapour, and for heating the material to be dried. The material is preferably stored in at least two essentially equally large lots (31, 32), each in one essentially gastight chamber (1, 2). Through one lot (31) there is conducted alternately a cooling/drying cycle and a heating cycle of equal duration, the former utilizing a first circulating gas flow (11) cooled by a cooling medium and the latter utilizing a second circulating gas flow (12) heated by a heating medium.

Abstract: Heat exchange between liquid (1) and air (2) is effected by causing the liquid (1) to flow, in the form of a liquid film (5) spreading under capillary action, between pairs (3) of vertically oriented band-shaped thin membranes (4a and 4b) held together by adhesive forces in the liquid film (5). The air flow (2) preferably is conducted in counterflow with the liquid flow (1) in gaps (6) surrounding the pairs of membranes (3). Exchange of heat between liquid and air occurs through the membrane walls (4a, 4b). The membranes (4a and 4b) preferably consist of a thin plastic film, for example matted polyester film.

Abstract: The disclosure relates to a rotary compressor for a gas and liquid mixture and comprising a disk-like rotor disposed in a fixed pump housing and having an annular peripheral gas and liquid channel. The channel includes an annular radially outer space for an entrapped liquid annulus and a radially inner, concentric annular space for gas, which is defined by a liquid trap-forming side wall which penetrates into the liquid annulus space. The gas space is divided into suction and compression chambers by one or more transverse walls connected to the rotor and radially from inwards penetrating into the liquid annulus space, and by planar liquid jets which are deflected from the rotating liquid annulus in the space therefor by means of one or more blades which are fixedly anchored in the pump housing and extend radially along the liquid annulus space.