Abstract: A cooling method using an adsorption agent is carried out in an apparatus including at least one reactor/adsorber embodied as a vessel for receiving the adsorption agent such as zeolite, at least one evaporator vessel receiving an evaporation agent such as water, and at least one line which connects the two vessels and which can be shut off with at least one shut-off member. The reactor/adsorber and the evaporator each have at least one orifice and are selectively connectable to a vacuum generator and to at least one condenser. The selective separation and connection of individual components and/or of component groups for carrying out regeneration and adsorption cycles take place in each case in a pressure-tight or vacuum-tight manner and with air being shut off.

Abstract: The invention relates to a method for cooling, using an adsorption agent, and with at least one rector/adsorber which comprises a vessel for receiving the adsorption agent, in particular zeolite, with at least one vessel serving as an evaporator and for receiving an evaporation agent, in particular water, and with at least one line which connects the two vessels and which is capable of being shut off at least with the aid of a shut-off member, the reactor/adsorber and the evaporator each having at least one orifice and being connectable to a vacuum generator and to at least one condenser.

Abstract: The invention relates to a reactor for a cooling installation for performing an adsorption and desorption process functioning in particular with zeolite as adsorbent and with water as adsorbate, the inside of a vacuum-tight housing being connectable to a vacuum generator and to a vessel containing water, and having a heating device and a sealable outlet opening for water vapor.

Abstract: An apparatus for cleaning wells using ultrasonic waves includes a plurality of magnetostrictive ultrasonic transducers and a water pump. The ultrasonic transducers are arranged in one or more planes and carried by an adjustment mechanism to allow the cleaning unit to be adjusted to different well diameters, while ensuring that each transducer remains properly oriented to direct the ultrasonic waves perpendicularly at the well casing from an optimum spacing distance. Any desired number of ultrasonic transducer modules can be connected together in the axial direction to ultrasonically clean a portion of the well having a desired axial length in each operating step. The ultrasonic transducers are operated with a power density of 8 to 12 W/cm.sup.2 of ultrasonic emitting surface area, at a frequency in the range of 18 to 25 kHz and preferably 20 kHz. In a first operating step, the ultrasonic transducers ultrasonically treat a first section of the well.