Temperature-dependent spectral emittance of bauxite and silica particle beds
Temperature-dependent spectral emittance of bauxite and silica particle beds
复制标题
铝土矿和二氧化硅颗粒床的温度依赖性光谱发射率
DOI：
10.1080/08916152.2022.2080301
复制
发表时间：
2022
影响因子：
3.5
通讯作者：
Zhang, Zhuomin M.
中科院分区：
文献类型：
--
作者：
Chen, Chuyang;Yang, Chiyu;Pan, Kevin;Ranjan, Devesh;Loutzenhiser, Peter G.;Zhang, Zhuomin M.
硼氢化物和二氧化硅颗粒是太阳能高温储热的候选材料。用新研制的发射计测量了铝土矿和二氧化硅颗粒填充床的发射率随温度的变化，测量波长为2 μm ≤λ≤ 16 μm，温度高达~730 K。室温发射率是从测量的定向半球反射率得到的。熔融石英盘被用来测试发射计通过比较测量的光谱发射度与从拟合的洛伦兹振荡器模型计算的发射度。对于多晶二氧化硅颗粒和熔融二氧化硅盘，测量的发射率在中红外区域中随温度增加。的基本机制被解释为温度依赖的阻尼系数的洛伦兹振子模型。研究了两种不同组成和粒度的铝土矿颗粒。当λ> 10 μm时，高温下的发射率比室温下的发射率高。在2 μm <λ< 6 μm范围内，不同类型粒子的温度依赖性不同。在规定温度下，利用普朗克分布，通过光谱积分计算了铝土矿颗粒床的总发射率。计算得到的总发射度在0.89 ~ 0.96之间，但不随温度单调变化。
Bauxite and silica particles are candidate materials for solar thermal energy storage at high temperatures. The temperature-dependent emittance of packed beds with bauxite and silica particles was measured using a newly upgraded emissometer at wavelengths 2 μm ≤λ≤ 16 μm and temperatures up to ~730 K. The room-temperature emittance was obtained from the measured directional-hemispherical reflectance. A fused silica disc was used to test the emissometer by comparing the measured spectral emittance with the calculated emittance from a fitted Lorentz oscillator model. For the polycrystalline silica particles and the fused silica disc, the measured emittance increases with temperature in the mid-infrared region. The underlying mechanism is interpreted as the temperature-dependent damping coefficient in the Lorentz oscillator model. Two types of bauxite particles with different compositions and sizes were investigated. Forλ> 10 μm, the measured emittance at elevated temperatures is higher than that at room temperature. In the region 2 μm <λ< 6 μm, the temperature dependence varies for different types of particles. The total emittance of bauxite particle beds was calculated by spectral integration using Planck’s distribution at the prescribed temperature. The calculated total emittance is between 0.89 and 0.96, but it does not change monotonically with temperature.
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DOI：
10.1016/0165-1633(86)90062-6
发表时间：
1986-11-01
期刊：
SOLAR ENERGY MATERIALS
影响因子：
--
作者：
GRIFFIN, JW;STAHL, KA;PETTIT, RB
通讯作者：
PETTIT, RB
影响因子：
3.7
作者：
GERVAIS, F;PIRIOU, B
通讯作者：
PIRIOU, B
DOI：
10.1115/1.4030970
发表时间：
2015-10-01
影响因子：
2.3
作者：
Martinek, Janna;Ma, Zhiwen
通讯作者：
Ma, Zhiwen
用于确定参与介质的热辐射特性的光谱测角系统
影响因子：
3.5
作者：
P. S. Coray;W. Lipiński;A. Steinfeld
通讯作者：
A. Steinfeld
影响因子：
2.1
作者：
Chuyang Chen;Chiyu Yang;Devesh Ranjan;P. Loutzenhiser;Zhuomin M. Zhang
通讯作者：
Chuyang Chen;Chiyu Yang;Devesh Ranjan;P. Loutzenhiser;Zhuomin M. Zhang