Commissariat a L'energie Atomique

Stéphane Colasson

Arnaud Bruch

Alain Marechal

Maxime Ducoulombier

A home heating radiator using a heat transfer fluid operating in phase change form, includes a reservoir of heat transfer fluid, and electric resistance heat source, for raising the temperature of the heat transfer fluid to a temperature such as to cause a phase change of the fluid, and a heating body where heat transfer takes place with the ambient air, the heating body including a number, n, of channels, communicating in the lowermost part of the reservoir, where n may be equal to 1.

Home heating radiator using a phase change heat transfer fluid

A vapour compression device including an internal heat exchanger, a low-pressure compressor and an associated gas cooler, a fluid distributor separating the fluid into a main circuit of the cycle and into an auxiliary cooling circuit of the cycle, an auxiliary expansion system placed on the auxiliary cooling circuit, and a main expansion system placed on the main circuit of the cycle. The device also includes a high-pressure compressor and an associated gas cooler placed on the main circuit of the cycle. A method for performing a transcritical fluid cycle including a substantially isentropic compression step of the fluid, on the main circuit of the cycle, to reach a maximum high pressure greater than a critical pressure of the fluid, and an isobaric cooling step of the fluid to substantially reach a cold source temperature.

Vapour compression device and method of performing an associated transcritical cycle

The invention relates to a heat exchanger comprising a supercritical carbon-dioxide circuit comprising a plurality of tubes (). The heat exchanger is original in that at least one section of the tubes () have surface irregularities () on their inner surface. These irregularities () are located within a zone () extending as far as a point located at a distance from the inlet () of the tube of maximum 400 times the diameter of the tube.

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Veurey-Voroize, France

Stéphane Colasson