Thermophotovoltaic Power Generation by Super-Adiabatic Combustion in Porous Quartz Glass

提出了一种基于多孔介质中往复流超绝热燃烧的新型热光伏发电系统，并通过数值模拟和实验进行了研究。该系统由陶瓷多孔介质和两块多孔石英玻璃组成，安装在绝热的流动管道中。多孔石英玻璃是由5个6 mm厚的多孔板堆叠而成，它们之间有很小的空间。将空气供应到多孔介质中;在多孔介质中，流动方向定期反转。燃料被注入中心陶瓷多孔介质和多孔石英玻璃之间的腔室中，用于交替燃烧。空气由上游侧的多孔石英玻璃预热。然后，温度通过与燃料燃烧而达到最大值。燃烧气体焓由下游侧多孔石英玻璃储存。当流动方向改变时，储存的能量被再生为空气中的焓增加。通过能量再循环， ...更多信息 当燃烧负荷仅为200 W时，陶瓷多孔介质的温度达到1500 K。从陶瓷多孔介质发射整个波长区域的强辐射能。其中，波长大于2.2微米的大部分辐射被多孔石英玻璃吸收，并转化为空气中的焓增加。另一方面，从可见光区域到2.2微米的波长范围的辐射穿过多孔石英玻璃。通过实验发现，石英玻璃的光学特性决定了短波长范围的辐射能量大部分从系统中发射出来，而长波长范围的辐射能量并不多。40%的燃烧热被转换成波长范围从可见光区域到2.2微米的辐射能。通过安装在燃烧系统两端的热光伏（TPV）电池，入射到电池表面的辐射能的30%被转换成电能。结果表明，仅采用往复流燃烧，从燃烧热到电能的总热效率达到12%。少

A new thermophotovoltaic (TPV) power generation system was proposed on the basis of reciprocating-flow super-adiabatic combustion in a porous medium and investigated through numerical simulation and experiment. This system consists of a thin ceramic porous medium and two porous quartz glasses installed in an insulated flowing-duct. The porous quartz glass is made of five 6mm thickness porous plates that are piled with a small space between them. Air is supplied into the porous media ; where the flow direction reverses regularly. Fuel is injected into chambers between the central ceramic porous medium and the porous quartz glass for alternative combustion. Air is preheated by the upstream-side porous quartz glass. Then, the temperature reaches the maximum by combustion with fuel. The combustion gas enthalpy is stoted by the downstream-side porous quratz glass. The stored energy is regenerated into the enthalpy increase in air when the flow direction changes. By the energy recirculation, … More the temperature of the ceramic porous medium reaches 1500K when the combustion load is only 200W. Strong radiant energy of the entire region of wavelength is emitted from the ceramic porous medium. Of those, most of the radiation of a wavelength longer than 2.2 microns is absorbed by the porous quartz glass and is converted into the enthalpy increase in air. On the other hand, radiation of a wavelength range from a visible region to 2.2 microns passes through the porous quartz glass. Through experiment, it is disclosed that according to the optical properties of the quartz glass, most of the radiant energy of the short wavelength range is emitted from the system, while that of the long one is not so much. A 40% of the combustion heat is converted into the radiant energy of the wavelength range from the visible region to 2.2 microns. By a thermophotovoltaic (TPV) cell installed at both ends of the combustion system, a 30% of the radiant energy incident on the cell surface is converted into electric power. As a result, the total thermal effeciency from combustion heat to electric power reaches the value of 12% using only reciprocationg-flow combustion. Less