Abstract: A refrigeration apparatus includes a container in which are situated a plurality of eutectic chilling elements and a spraybar for dispensing a mist of liquid cryogen into a region R in which product to be refrigerated is to be stored. Liquid cryogen is used to freeze the eutectic and is then passed to the spray bar.

Abstract: An apparatus for controlling the temperature in a building for human or animal occupancy comprises a source of liquid breathable, life-supporting gas consisting of oxygen and nitrogen, dispensing means for dispensing a vaporized mist of the gas within said building. The dispensed mist, being at significantly lower than ambient temperature, acts to cool the atmosphere within the building much more rapidly and effectively than conventional systems.

Abstract: A method of controlling the temperature in an enclosure comprising providing means for dispersing a vaporized cryogenic life-supporting gas within the enclosure to supplement and/or replace a mechanical refrigeration system normally provided therein. The chilling capacity of such a cryogenic system is significantly greater than that available in any presently known mechanical system and hence enhanced overall operation may be achieved. Additionally, the fact that the cryogenic gas is breathable permits an operator to enter the enclosure without presenting any hazard thereto.

Abstract: In the manufacture of moulds or mould cores, refractory sand, a resin binder and a catalyst are passed into a mixer to form a free-flowing mixture from which the moulds or mould cores are made. As the sand is fed into the mixer it is cooled by contact with an atmospheric gas in liquid or solid state or the cold vapor of such a gas so as to keep the temperature of the sand as it enters the mixer below that at which the resin cures. To enable the sand to be delivered below a chosen temperature from a quarry to a foundry where the sand is used, the sand after quarrying and drying is fluidized by air, an atmospheric gas in liquid or solid state being introduced into the fluidizing air so as to lower its temperature.