Heat transfer system for a vehicle

A heat transfer system for transferring heat for use onboard a vehicle, the heat transfer system comprising

• a conductor arranged to conduct exhaust gas discharged from an engine, the conductor including a housing formed to include an interior region, an inner tube positioned in the interior region and formed to include an inner exhaust gas passageway, and an intermediate tube positioned in the interior region and surrounding the inner tube, the housing and the intermediate tube cooperating to provide an outer exhaust gas passageway therebetween, the intermediate tube and the inner tube cooperating to provide an intermediate exhaust gas passageway therebetween and in communication with the outer exhaust gas passageway and the inner exhaust gas passageway, and
• an outer tube formed to include an outer tube passageway to conduct a fluid therethrough, the outer tube extending through the outer exhaust gas passageway and being configured to block fluid communication between the outer tube passageway and the interior region to transfer heat from exhaust gas discharged from the engine and flowing in series along a serpentine path through the outer exhaust gas passageway and past the outer tube in a first direction, through the intermediate exhaust gas passageway in a second direction opposite to the first direction, and through the inner exhaust gas passageway in the first direction to the fluid flowing through the outer tube passageway for transmission of the heated fluid for use onboard a vehicle, the outer tube surrounding the intermediate tube.

A heat transfer system for transferring heat for use onboard a vehicle, the heat transfer system comprising

• a housing,
• an inner tube positioned within the housing and defining an inner exhaust gas passageway,
• an intermediate tube positioned within the housing and surrounding the inner tube, the intermediate tube and the housing defining an outer exhaust gas passageway therebetween, the intermediate tube and the inner tube defining an intermediate exhaust gas passageway therebetween, and
• a coil defining a coil passageway, the coil being positioned in the outer exhaust gas passageway and surrounding the intermediate tube for transfer of heat from exhaust gas to fluid flowing through the coil passageway upon flow of exhaust gas along a serpentine path, in series, through the outer exhaust gas passageway in a first direction, the intermediate exhaust gas passageway in a second direction opposite to the first direction, and the inner exhaust gas passageway in the first direction.