Patent ID: 8333087

Claim:
A heat transfer system for a product, comprising: a housing having an internal chamber; a baffle substantially impervious to gas flow therethrough and being disposed in the internal chamber for separating the internal chamber into upper and lower portions; a spiral pathway, comprising: an upper pathway within the upper portion, wherein each of the upper pathway and the upper portion has a width equal to the other, and a lower pathway within the lower portion, and wherein each of the lower pathway and the lower portion has another width equal to the other; a gas flow pathway, comprising: an upper gas flow across the upper pathway, and a lower gas flow across the lower pathway and in counter-flow to the upper gas flow, wherein the upper gas flow and lower gas flow define a circulation loop; a drum disposed in the internal chamber extending between the upper and lower portions, the drum including an outer side wall impervious to the upper and lower gas flows and about which is arranged the baffle and the spiral pathway; and at least one blower operatively associated with the internal chamber to induce the upper and lower gas flows along the circulation loop.