基于粒子为能量吸收、热量传递及催化剂载体的太阳能高温热化学反应器可以将集热和热化学反应耦合在反应器内同时完成，具有稳定性好、效率高等优点而具有广泛的应用前景，其中高温热辐射是粒子系反应器内主要传热方式。针对反应器内能量转换效率受粒子系光谱辐射特性严重影响的问题，本申请拟开展：1、搭建高温粒子系光谱辐射特性实验测量平台，开展考虑粒子辐射场间相互干扰的高温球形、非球形粒子系光谱辐射特性理论建模研究；2、构建精确模拟粒子系反应器内多维、多光谱辐射输运模型，并发展高效精确数值算法；3、采用实验测量和数值计算相结合的方法开展太阳能高温热化学转换过程中粒子系反应器内“光-热-化学”多场耦合研究，获得粒子的形状、浓度、粒径分布等参数对反应器内能量转换效率的影响规律，揭示通过调整粒子系光谱辐射特性参数实现粒子系反应器内能量转换效率提高的调控机制，为研发高效、低成本粒子系太阳能高温热化学反应器提供理论指导。

High temperature solar thermochemical particle reactor can couple the energy absorption, heat transfer and catalyst in the reactor with good stability and high efficiency, which has broad application prospect. Radiative transfer accounts the mainly part of heat transfer in the high temperature solar thermochemical particle reactor. As the energy conversion efficiency is highly related to the radiative properties of particles, this application would research the following contents: 1. Setting up high-temperature particle-based spectral radiative characteristic experimental rig, and developing theoretical models for radiative property calculation of high-temperature particles; 2. Building precise multi-dimensional, multi-spectral radiative transfer model for high temperature solar thermochemical particle reactor and develop the numerical calculation method with high efficiency and precision; 3. Combining the experimental measurements and numerical method to study the “light-heat-thermochemical” coupled problems, obtaining the effects of particle shape, density and particle size distribution on energy conversion efficiency in the particle reactor, and revealing the mechanism of regulating the radiative transfer to optimize temperature distribution and improving the energy conversion efficiency in the particle reactor. The achievement of this study can provide theoretical guidelines for developing high temperature solar thermochemical particle reactor with high efficiency and low cost.