EFFECTS OF TEMPERATURE ON CHARACTERS OF THE THERMOELECTRIC GENERATOR USING IN LNG ENERGY RECOVERY

Zongzheng Ma ； Xiupeng Yan ； Haishu Ma ； Shilong Wang

《電機工程學刊》 26卷6期 (2019/12) Pp. 237-243

https://doi.org/10.6329/CIEE.201912_26(6).0003

摘要

The energy recovery of the liquefied natural gas (LNG)engine using thermoelectric generation(TEG) technology is good for improving engine thermal efficiency due to its cold energy and other waste heat recovery. One experimental test bed for simulating cold energy recovery of LNG engine is established in order to reveal the relationship of the temperature and seebeck coefficient which the low temperature conditon is realized with liquid nitrogen. And the relationship between the temperature and characters of thermoelectric generator was researched based on this test bed. The experimental results show that the output voltage increases with the increase of temperature difference between the hot and cold end of the thermoelectric generator but the relationship is nonlinear resulting from the seebeck coefficient change. Then the seebeck coefficient is studied when the hot end and cold end is fixed respectively. The results show that the seebeck coefficient has a peak value when the cold end temperature of TEG is -60℃ and there is different trend on each side of the peak value. The seebeck coefficient reduces with the increase of cold end temperature when the temperature of cold end is higher than -60℃, while the seebeck coefficient increases with the decrease of cold end temperature when the temperature of cold end is lower than-60℃.

關鍵字

Thermoelectric Generation ； Characters ； Seebeck Coefficient ； Low Temperature