Method for recovering energy from dry ice at infra-atmospheric pressure
AssigneeCryo Pur
InventorsDenis Clodic, Joseph Toubassy
Life of this patent
Estimating the term…
Abstract
A method of recovering energy produced by the change of phase of dry ice using a device having an enclosure (2) containing dry ice at an infra-atmospheric pressure and at a solidification temperature corresponding to the infra-atmospheric pressure; and a primary energy recovery circuit (3), in which a heat transfer fluid circulates, passing through the enclosure. The method involves passage of the heat transfer fluid into the primary circuit (3), this step causing the heating of the dry ice and its change of phase into CO2 and the cooling of the heat transfer fluid; extraction of the CO2 contained in the enclosure (2); and substantially continuous lowering of the pressure of the enclosure (2) to an infra-atmospheric pressure.
Claims8
A method of recovering energy produced by a phase changing of dry ice, said method being implemented by a device (1) comprising:
- an enclosure (2) containing the dry ice at an infra-atmospheric pressure;
- a primary energy recovery circuit (3), in which a primary heat transfer fluid circulates, passing through the enclosure (2);
- the method comprising the following steps:
- passage of the heat transfer fluid into the primary circuit (3) causing the heating and the phase changing of the dry ice into gaseous CO2 and the cooling of the heat transfer fluid;
- extraction of the gaseous CO2 contained in the enclosure (2);
- a substantially continuous lowering of the pressure of the enclosure (2) to the infra-atmospheric pressure;
- and
- conveyance of the gaseous CO2 extracted from the enclosure (2) into a heat exchanger (9) in which the gaseous CO2 transfers heat to a secondary heat transfer fluid circulating in a secondary circuit (14).
Dependencies are inferred from the claim text.