Dynamic Characteristics of Energy Release and Sensitivity Analysis of CaO/CaCO<sub>3</sub> Fluidized Bed Reactor

CU Wenkai; FANG Jiabin; WEI Jinjia; GUO Xiaodie; ZHENG Nan

doi:10.7652/xjtuxb202409003

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Dynamic Characteristics of Energy Release and Sensitivity Analysis of CaO/CaCO₃ Fluidized Bed Reactor

更新时间：2025-07-28

- Dynamic Characteristics of Energy Release and Sensitivity Analysis of CaO/CaCO₃ Fluidized Bed Reactor
- Vol. 58, Issue 9, Pages: 19-29(2024)
- 作者机构：
  
  1. 西安交通大学化学工程与技术学院,西安,710049
  2. 西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202409003
  CLC： TK51
- Online First：10 September 2024，
  
  Published：2024
- 稿件说明：
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CU Wenkai, FANG Jiabin, WEI Jinjia, et al. Dynamic Characteristics of Energy Release and Sensitivity Analysis of CaO/CaCO₃ Fluidized Bed Reactor[J]. 2024, 58(9): 19-29. DOI: 10.7652/xjtuxb202409003.
DOI：

CU Wenkai, FANG Jiabin, WEI Jinjia, et al. Dynamic Characteristics of Energy Release and Sensitivity Analysis of CaO/CaCO₃ Fluidized Bed Reactor[J]. 2024, 58(9): 19-29. DOI: 10.7652/xjtuxb202409003. DOI：

摘要

为了获得CaO/CaCO

流化床反应器释能过程的动态特性、提高其系统设计与安全调控水平

基于有限体积法

构建了MW级的可用于sCO

热发电系统的CaO/CaCO

流化床反应器的动态仿真模型。研究了该反应器系统在典型扰动下的动态响应特性

并就不同关键参数对CaO/CaCO

流化床反应器释能过程中传热传质的影响进行了敏感性分析。研究结果表明:改变吸热侧sCO

的进口流量和温度

会显著影响出口温度; 相较于改变放热侧颗粒的进口温度

改变其进口流量对吸热侧sCO

出口温度的影响更为明显

10%的放热侧颗粒进口流量阶跃扰动可导致吸热侧sCO

出口温度变化可达17.5 ℃

而相同比例的进口温度扰动最高只能使吸热侧sCO

出口温度产生3.9 ℃的变化; 增加管数、减少管径和减小粒径有助于提高CaO/CaCO

流化床反应器的热效率和转化率

且增加管数的影响最为明显

当管数从20增加至40根时

反应器的热效率和CaO颗粒转化率分别提高了2.9%和2.4%。该研究结果可用于指导CaO/CaCO

热化学储能和太阳能热发电系统的集成与设计。

Abstract

This study utilizes the finite volume method to construct a dynamic simulation model for a MW-level CaO/CaCO

fluidized bed reactor used in the sCO

solar thermal power plant. The aim is to gain insights into the dynamic characteristics of the CaO/CaCO

fluidized bed reactor during its energy release process and enhance its system design and safety control. The

dynamic response characteristics of the reactor system under typical disturbances are investigated

and a sensitivity analysis is conducted on the influence of key parameters on heat and mass transfer during the energy release process of the CaO/CaCO

fluidized bed reactor. Results indicate that altering the inlet flow rate and temperature of sCO

on the absorptive side significantly affects the outlet temperature. Compared to changing the particle's inlet temperature on the exothermic side

adjusting the particle's inlet flow rate has a greater impact on the outlet temperature. A step disturbance of 10% in the inlet flow rate of exothermic-side particles can result in temperature fluctuations up to 17.5 ℃ at the outlet of the sCO

on the absorptive side. In contrast

a similar percentage disturbance in the inlet temperature can only lead to a maximum temperature change of 3.9 ℃ at the outlet of the sCO

on the absorptive side. Furthermore

increasing the number of tubes

reducing tube diameter

and decreasing particle size contribute to improving the thermal efficiency and conversion rate of the CaO/CaCO

fluidized bed reactor. Increasing the number of tubes shows the most obvious effect. When the number of tubes increases from 20 to 40

the thermal efficiency and CaO particle conversion rate of the reactor rises by 2.9% and 2.4%

respectively. These research findings can guide the integration and design of CaO/CaCO

thermochemical energy storage and solar thermal power generation systems.

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⁰

Dynamic Characteristics of Energy Release and Sensitivity Analysis of CaO/CaCO3 Fluidized Bed Reactor

DOI：10.7652/xjtuxb202409003

摘要

Abstract

关键词

Keywords

references

Dynamic Characteristics of Energy Release and Sensitivity Analysis of CaO/CaCO₃ Fluidized Bed Reactor