流化床
吸收率
材料科学
太阳能集热器中的纳米流体
颗粒
集中太阳能
热流密度
热力学
化学
热能储存
核工程
太阳能
传热
光电-热混合太阳能集热器
热的
光学
复合材料
物理
工程类
反射率
生物
生态学
作者
Hangbin Zheng,Xianglei Liu,Yimin Xuan,Chao Song,Dachuan Liu,Qibin Zhu,Zhonghui Zhu,Ke Gao,Yongliang Li,Yulong Ding
标识
DOI:10.1016/j.renene.2021.07.026
摘要
Conventional solar thermochemical heat storage based on indirect surface-heating usually suffers from high heat losses and low solar-chemical efficiency. Here, a different solar thermochemical heat storage system based on direct solar illumination on fluidized black CaCO3 pellets is proposed. A Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) model considering irradiation ray tracing, granular flow, heat and mass transfer, and chemical reaction, is built. Black CaCO3 pellets are fabricated via a facile template mixing method, and the solar absorptance is enhanced to 63.9% from 27.9% of traditional pure CaCO3. Effects of gas velocity and irradiative flux on thermochemical heat storage performance in a fluidized volumetric bed are investigated by incorporating measured kinetic and solar absorptance properties of designed black CaCO3 pellets. The peak solar-chemical efficiency reaches a value higher than 43% benefiting from enhanced solar absorptance, higher gas velocity and irradiative flux. This work guides the design of the high-efficiency direct solar thermochemical heat storage system.
科研通智能强力驱动
Strongly Powered by AbleSci AI