Çok Katmanlı Kanatçıklar, Termoelektrik Jeneratörlerin Tekdüzelik ve Güç Performansını Artırıyor

Özet (abstract)

Thermal uniformity and output power are two critical yet often conflicting performance characteristics of thermoelectric generator systems. This study proposes a multi-layer fin hot side heat exchanger to improve thermal uniformity while minimizing associated output power trade-offs. The influences of the fin-reduction step, r f , and the fin number in the last layer, N f,last , are investigated using a hybrid model combining computational fluid dynamics and thermal resistance calculations. The findings show that the multi-layer fin configuration reduces longitudinal heat conduction, intensifying temperature concentration in the front region of the heat exchanger. Increasing the r f suppresses this effect by redistributing the exhaust velocity and heat transfer area, enhancing the longitudinal temperature uniformity at the cost of reduced power. Meanwhile, increasing N f,last amplifies these effects, thereby improving the trade-off. The net output power improvement can reach 6.93%, while the improvement in thermal uniformity can be up to 90.43%. The cases N f,last = 34 & r f = 4 and N f,last = 34 & r f = 5 improve temperature uniformity while maintaining or increasing net output power. The proposed structure can improve the thermal uniformity by approximately 18% without sacrificing net output power and maintains a lower power reduction by 5–8% than the previously investigated trapezoidal fin and inclined muffler wall structures at comparable thermal uniformity levels. These findings demonstrate that the multi-layer fin structure is an effective approach for mitigating the trade-off between output power and thermal uniformity, contributing to the development of low-cost and efficient thermoelectric generator systems for internal combustion engines.

Yazarların özeti; kaynağından alınmıştır. Case Studies in Thermal Engineering, 2026 · DOI ↗