Heat Recovery from Automotive Exhaust Using Heat Pipes with Limited Fluid Charge

作     者：Bin Xiao 

作者机构：Department of Engineering TechnologyTexas State UniversitySan Marcos78666USA 

出 版 物：《Frontiers in Heat and Mass Transfer》 (热量和质量传递前沿（英文）)

年 卷 期：2024年第22卷第1期

页      面：35-48页

核心收录：

学科分类：080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 

主　　题：Thermosyphon heat recovery system auto exhaust parametric effect 

摘      要：Experiments were conducted in this study to examine the thermal performance of a thermosyphon,made from Inconel alloy 625,could recover waste heat from automobile exhaust using a limited amount of *** thermosyphon has an outer diameter of 27 mm,a thickness of 2.6 mm,and an overall length of 483 *** study involved directing exhaust gas onto the *** length includes a 180-mm evaporator,a 70-mm adiabatic section,a 223-mm condenser,and a 97-mm finned *** study examined the thermal performance of the thermosyphon under exhaust flow rates ranging from 0–10 g/sec and temperatures varying from 300℃–900℃.The influence of three parameters—inclination angle(5°–45°),water mass(2–5.3 g),and the quantity of non-condensable gas Argon(0–0.6 g)—was investigated to assess their impacts on the thermosyphon’s thermal *** experimental findings revealed that with 3 g of water and 0.0564 g of argon in the thermosyphon,the condenser reached its highest temperature at around 200℃.The ideal fuel loading rate for the thermosyphon falls between 0.2 and 0.7 g/***,as inclination angles rise,outer wall temperatures of the thermosyphon *** is attributed to the explicit expansion of the effective heating area within the evaporation section,coupled with an amplified gravitational component of the water ***,an upsurge in the quantity of non-condensable gas(NCG)can mitigate temperature gradients on the outer wall,resulting in a decline in the thermosyphon’s *** insulation applied to the adiabatic section demonstrated efficacy in augmenting temperature gradients on the outer wall,thereby improving the overall performance of the *** the water charge within the thermosyphon increases,there is a corresponding rise in heat transfer rates both from the exhaust to the thermosyphon and from the thermosyphon to the fuel.