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首页> 外文期刊>Fuel Processing Technology >Numerical study on energy conversion performance of micro-thermophotovoltaic system adopting a heat recirculation micro-combustor
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Numerical study on energy conversion performance of micro-thermophotovoltaic system adopting a heat recirculation micro-combustor

机译：高热光源系统采用热再循环微燃烧器能量转换性能的数值研究

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摘要

In order to evaluate the energy conversion performance of micro-thermophotovoltaic system (MTPV) effectively, a novel calculation method combining Fluent with MAT1AB program is proposed, which has considered the non uniformity of temperature distribution of radiant surface, the angular coefficient between the emitter and the PV cell and its cooling efficiency. In this paper, numerical study on hydrogen/air premixed combustion in micro combustors integrated with MTPV system to produce electricity has been adopted. Results show that the overall efficiency of heat recirculation combstor is almost twice as large as obtained in straight channel combustor. Furthermore, dimensionless baffle length, a key parameter in designing micro-combustor with heat recirculation, has been investigated. It is concluded that the subsystem efficiencies of MTPV system are increasing first and then descending with an increase in dimensionless baffle length. However, as the dimensionless baffle length reaches a certain point, the working performance of subsystems changes little. Meanwhile, it is demonstrated that increasing the dimensionless channel gap reasonably will improve the combustion process. Finally, the energy conversion performances as a function of hydrogen volume flow rate are calculated and compared. Results indicate that choosing a proper inlet velocity is of great pivotal to gain a better energy conversion performance of MTPV system. Of all the investigated cases, the maximum power generated with the MTPV is 1.4014 W and the overall efficiency is 0.7092%.
机译：为了有效地评估微炎散热体系（MTPV）的能量转换性能，提出了一种新的计算方法，与MAT1ab程序流畅，这已经考虑了辐射表面温度分布的不均匀性，发射器之间的角度系数光伏电池及其冷却效率。本文采用了与MTPV系统集成以产生电力的微燃烧器中氢气/空气预混燃烧的数值研究。结果表明，热再循环梳理的总效率几乎是直通道燃烧器中获得的两倍。此外，研究了无量纲挡板长度，在设计具有热再循环的微燃烧器中的关键参数。得出结论，MTPV系统的子系统效率首先增加，然后下降随着无量纲挡板长度的增加而下降。然而，随着无量纲挡板长度达到一定点，子系统的工作性能很少变化。同时，证明了增加无量纲沟道间隙，合理地将改善燃烧过程。最后，计算并比较了作为氢气体积流量函数的能量转换性能。结果表明，选择适当的入口速度是很大的关键，以获得MTPV系统的更好能量转换性能。在所有调查的情况下，用MTPV产生的最大功率为1.4014 W，总效率为0.7092％。

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