Historically,several types of heat exchangers and different heat transfer enhancement measures such as ribbing,grooving and protrusions have been investigated since the first auto mobile thermoelectric generator(TEG) was built in 1963 [3].
Historically,several types of heat exchangers and different heat transfer enhancement measures such as ribbing,grooving and protrusions have been investigated since thefirst auto mobile thermoelectric generator(TEG) was built in 1963 [3].