Abstract: Cold generating apparatus, wherein it comprises a cold storage enclosure filled with a material having a solid-liquid transmission in the vicinity of the operating temperature of the apparatus, a first panel forming a radiating surface, whose radiation drops into at least one of the atmospheric windows, a substantially vertical second panel immersed in the material of the cold storage enclosure, a pipe in the form of a coil on each of the first and second panels, said pipes being connected by plastically deformable couplings to form a closed circuit and a certain quantity of a fluid which is vaporizable under the operating conditions of the apparatus within the closed circuit, the assembly constituted by the first and second panels, the closed circuit and the heat transfer fluid forming a device of the heat pipe type serving as a thermal diode which only transmits heat in the direction from the storage enclosure to the radiating surface.

Abstract: A heat-transporting fluid F is passed over a material C having a high latent heat of fusion and in direct contact therewith so that the fluid and the material exchange heat at a temperature close to the melting point of the material. By contacting the hot fluid F with the material C, this material melts and accumulates heat in the form of latent heat of fusion while cooling the fluid F. When the cold fluid is contacted directly with the material C, this material solidifies and releases heat which is transmitted to the fluid F.

Abstract: A heat-transporting fluid F is passed over a material C having a high latent heat of fusion and in direct contact therewith so that the fluid and the material exchange heat at a temperature close to the melting point of the material. By contacting the hot fluid F with the material C, this material melts and accumulates heat in the form of latent heat of fusion while cooling the fluid F. When the cold fluid is contacted directly with the material C, this material solidifies and releases heat which is transmitted to the fluid F.

Abstract: A heat-transporting fluid F is passed over a material C having a high latent heat of fusion and in direct contact therewith so that the fluid and the material exchange heat at a temperature close to the melting point of the material. By contacting the hot fluid F with the material C, this material melts and accumulates heat in the form of latent heat of fusion while cooling the fluid F. When the cold fluid is contacted directly with the material C, this material solidifies and releases heat which is transmitted to the fluid F.

Abstract: A first mass of driving vapor is admitted into a single chamber of variable volume and permitted to perform isobaric then polytropic work in an expansion which increases the chamber volume. A second mass of vapor derived from the refrigeration cycle is then admitted at constant pressure in order to attain maximum volume. The work performed by the driving vapor is utilized in a polytropic process for compressing the vapor masses which are then discharged to the condenser in an isobaric process when the chamber approaches minimum volume.