Comparative Analysis of Heat Transfer Characteristics of Conical Cavity Receivers With Different Heat Transfer Fluids

Ding WANG; Yuxuan CHEN; Hu XIAO; Yanping ZHANG

doi:10.12096/j.2096-4528.pgt.21096

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Comparative Analysis of Heat Transfer Characteristics of Conical Cavity Receivers With Different Heat Transfer Fluids

Solar Thermal Power Generation Technology | 更新时间：2025-07-04

- Comparative Analysis of Heat Transfer Characteristics of Conical Cavity Receivers With Different Heat Transfer Fluids
- Power Generation Technology Vol. 42, Issue 6, Pages: 682-689(2021)
- 作者机构：
  
  华中科技大学能源与动力工程学院, 湖北省武汉市 430074
- 作者简介：
- 基金信息：
  
  National Key Research & Development Program of China(2018YFE0127500);Major Innovation Projects of Hubei Province(2019AAA017)
- DOI：10.12096/j.2096-4528.pgt.21096
  CLC： TK513
- Received：30 July 2021，
  
  Published：31 December 2021
- 稿件说明：
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Ding WANG, Yuxuan CHEN, Hu XIAO, et al. Comparative Analysis of Heat Transfer Characteristics of Conical Cavity Receivers With Different Heat Transfer Fluids[J]. Power Generation Technology, 2021, 42(6): 682-689.
DOI：

Ding WANG, Yuxuan CHEN, Hu XIAO, et al. Comparative Analysis of Heat Transfer Characteristics of Conical Cavity Receivers With Different Heat Transfer Fluids[J]. Power Generation Technology, 2021, 42(6): 682-689. DOI： 10.12096/j.2096-4528.pgt.21096.

摘要

为探究传热工质对太阳能吸热器传热特性的影响，利用光线追踪和计算流体动力学方法，对采用超临界CO

和压缩空气作为传热工质的锥形腔体吸热器的传热特性进行对比分析。基于数值模拟讨论了吸热器锥角、工质进口流量和进口温度对吸热器传热性能的影响规律。结果表明：相同工况下，压缩空气的出口温度比超临界CO

高，但相应的吸热器热效率和系统光热转化效率却较低。对于2种传热工质，系统光热转化效率均在锥角为4.12°时取得最优值。在研究的运行参数范围内，传热工质的出口温度随进口温度的增加呈线性增长；当流量超过0.04 kg/s时，继续增大流量对提高系统光热转化效率作用较小。

Abstract

To explore the influence of heat transfer fluids on the heat transfer characteristics of solar receivers

the heat transfer characteristics of conical cavity receivers with supercritical CO

and compressed air as heat transfer fluids were compared and analysed by combining ray tracing and computational fluid dynamics method. Based on numerical simulation

the effects of cone angle

fluid inlet mass flow rate and inlet temperature on heat transfer performance of receivers were discussed. The results show that under the same working conditions

the outlet temperature of compressed air is higher than that of supercritical CO

but the corresponding receiver thermal efficiency and system photothermal conversion efficiency are lower. For the two heat transfer fluids

the system photothermal conversion efficiencies reach the optimal values with the cone angle of 4.12°. In the range of operating parameters studied

the outlet temperature of heat transfer fluids increase linearly with the increase

of inlet temperature. Once the mass flow rate exceeds 0.04 kg/s

increasing the mass flow rate has little effect on improving the photothermal conversion efficiency of the system.

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