This application is directed to a compact heat transfer system for use in heat transfer applications occurring in confined spaces. There is a need to improve heat transfer efficiencies in heat transfer systems designed for confined spaces. The heat exchanger device (14) of the present application, comprises a bladder (16) configured to contain a heat transfer fluid, and a recirculating fluid path (20) formed by a conduit circuit (36) to operatively communicate with the bladder, the bladder configured to provide shape-conformable interfaces (24, 82, 84) for heat transfer between the heat transfer fluid and an exposed surface (26) within the confined space (12). The conduit circuit (36) further extends through a secondary heat exchange unit (38) located at a heat generating device (30).
