Thermoelectric generator for engine exhaust
First Claim
1. A voltage generator comprising a bank of elongate fins arranged with their longitudinal axes substantially parallel, each fin having a first longitudinal edge in direct heat transfer relation with a source of waste heat emitted from an engine such that a relatively high temperature zone exists at the first longitudinal edge portion, and a second longitudinal edge opposed to the first edge and remote from the heat source, the said second edges being unenclosed free edges, the bank of fins being located within an air flow such that cooling air can pass freely along the fins so that the fins are cooled and a relatively low temperature zone exists at the second edge portion of each fin, and a multiplicity of thermocouples mounted on each fin, each thermocouple having one junction in the high temperature zone of the fin, and a second junction in the low temperature zone of the fin.
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Abstract
A voltage generator (1) which is adapted to be mounted on the exhaust pipe (9) of a motor vehicle comprises a plurality of thermocouples mounted on support fins (3) the hot junctions of the thermocouples being adjacent the longitudinal edge (5) of the fins (3) closest to the exhaust pipe (9) and the cold junctions being adjacent the longitudinal edge (7) of the fins (3) which is remote from exhaust pipe (9). The arrangement is such that the heat of the exhaust gases causes a voltage to be produced by the thermocouples.
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Citations
2 Claims
- 1. A voltage generator comprising a bank of elongate fins arranged with their longitudinal axes substantially parallel, each fin having a first longitudinal edge in direct heat transfer relation with a source of waste heat emitted from an engine such that a relatively high temperature zone exists at the first longitudinal edge portion, and a second longitudinal edge opposed to the first edge and remote from the heat source, the said second edges being unenclosed free edges, the bank of fins being located within an air flow such that cooling air can pass freely along the fins so that the fins are cooled and a relatively low temperature zone exists at the second edge portion of each fin, and a multiplicity of thermocouples mounted on each fin, each thermocouple having one junction in the high temperature zone of the fin, and a second junction in the low temperature zone of the fin.
Specification