Design and Optimization of Biosyngas-Combustion-Driven Micro Combined Heat and Power System

Abstract

This study adopted a thermophotovoltaic(TPV) system assembled with a Stirling engine as a combined heat and power(CHP) system and using syngas as input fuel to achieve the goal A micro TPV combustor was the main component for the CHP system The micro TPV combustor is a coaxial tube which is made of platinum H2 and CO premixed with air are the fuel alternative as syngas delivered to inner channel while premixed CH4-air delivered to the outer channel of the micro TPV combustor Different mixing and equivalence ratios of H2 to CO were set to examine the combustion characteristics and flame behavior through the micro TPV combustor Due to the higher absorptivity of CO the rising amount of CO concentration blocked the catalytic surface causing a lower surface reaction of H2 Moreover in rich-CO condition H2 reactions promote CO oxidation through the combustion regions resulting in the incandescent emits from the micro TPV combustor more uniform Although flashback occurs at high-velocity conditions it has shown that with the presence of CO it has a higher irradiance and uniformity emission of the micro TPV combustor A Stirling engine was assembled with micro-TPV combustor to convert the waste heat to electricity and hot water supply The CHP system is able to improve the overall efficiency with the assistance of power and heat output installation At last the Taguchi method was used to optimize the operation condition of the fuel delivery through the micro TPV combustor The overall efficiency could reach almost 40%

Date of Award	2019
Original language	English
Supervisor	Yueh-Heng Li (Supervisor)