氢气在微燃烧器内的能源转化

Energy Conversion of Hydrogen in Micro-combustor

采用MATLAB程序建立了带有余热回收的微燃烧器的一维数值模型,计算了TPV(thermo-photovoltaic)系统中化学能转化为电能的能量转化效率。探讨微燃烧器中氢气在空气和纯氧条件下的燃烧特性,研究了当量比、内管直径、进气速度和传热系数对微燃烧器燃烧性能的影响。结果表明,当当量比为1时,氢气在纯氧下的淬火直径(0.065 mm)比在空气中(0.1 mm)小;当当量比为1,内管直径为0.5 mm时,在TPV系统中,氢气在纯氧下的能量转化效率(6.3%)比在空气中(1.6%)高。

A one-dimensional numerical model of micro-combustor with waste heat recovery was developed by using MATLAB program. The conversion efficiency of chemical energy into electric energy in thermal photovoltaic system was calculated. The combustion characteristics of hydrogen in micro-combustor under air and pure oxygen conditions were investigated. The effects of equivalence ratio, inner tube diameter, in-let velocity and heat transfer coefficient on the combustion performance of micro-combustor were studied. The results show that when the equiv-alence ratio is 1, the quenching diameter of hydrogen in pure oxygen(0.065 mm) is smaller than that in air (0.1 mm);when the equivalence ratio is 1 and the inner tube diameter is 0.5 mm, the energy conversion efficiency of hydrogen in pure oxygen (6.3%) is higher than that in air (1.6%).