Patent ID: 7293421
Filing Date: 2007-11-13
Classification: F25B,F25J,Y02A,Y02B

Abstract:
1. A method for cooling a product (P) comprising N ordered adsorption/desorption cycles ( 100 , 200 , 300 , 400 , 500 , 600 ) performed under vacuum, N being an integer greater than 1, each cycle comprising the steps consisting in: extracting heat from a refrigerating fluid in the vapor phase in a condenser ( introducing said refrigerating fluid in the liquid phase into an evaporator ( supplying heat to the liquid fraction of said refrigerating fluid at said second pressure in said evaporator in order to evaporate said refrigerating fluid, adsorbing said refrigerating fluid in the vapor phase in at least one adsorption/desorption chamber ( once a quantity of said refrigerating fluid has been adsorbed into said zeolite adsorbent, regenerating said zeolite adsorbent by heating in order to desorb said quantity of refrigerating fluid in the vapor phase, returning said quantity of refrigerating fluid in the vapor phase to said condenser, said method further comprising the steps consisting in: performing N-1 heat exchanges, each performed between the refrigerating fluid in the evaporator ( 103 , 203 , 403 , 503 ) of one cycle and the refrigerating fluid in the condenser ( 201 , 301 , 501 , 601 ) of the next cycle in the order of the cycles in order thus to supply said heat to said evaporator and extract said heat in said condenser, and cooling said product by exchange of heat with the refrigerating fluid at least in the evaporator ( 303 , 603 ) of the last cycle.