Patent ID: 7938171

Claim:
A heat exchanger system comprising: a first fluid layer defining a first flowpath for a gas; a second fluid layer defining a second flowpath for a liquid; a first vapor cycle layer located between the first fluid layer and the second fluid layer for enabling heat transfer between the first and second fluid layers, wherein the first vapor cycle layer comprises a first working medium configured to transfer heat through an evaporation and condensation cycle; a first boundary wall defining a shared boundary between the first fluid layer and the first vapor cycle layer; a second boundary wall defining a shared boundary between the second fluid layer and the first vapor cycle layer, wherein the first working medium of the first vapor cycle layer is sealed off between the first and second boundary walls; and a second vapor cycle layer located adjacent to the second fluid layer and opposite the first vapor cycle layer, wherein a second working medium of the second vapor cycle layer comprises a material with an evaporation and condensation cycle that operates under different temperature and pressure conditions than the first working medium of the first vapor cycle layer, and wherein the first working medium and the second working medium comprise different materials.