EN采用不同传热工质的锥形腔式吸热器传热特性对比分析
Comparative Analysis of Heat Transfer Characteristics of Conical Cavity Receivers With Different Heat Transfer Fluids
- 发电技术 2021年42卷第6期 页码：682-689
- 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：
[ "王鼎(1997), 男, 硕士研究生, 研究方向为太阳能吸热器传热特性数值模拟, 741099174@qq.com" ]
[ "陈宇轩(1993), 男, 博士研究生, 研究方向为太阳能吸热器疲劳蠕变分析, cyx0126@hust.edu.cn" ]
[ "肖虎(1995), 男, 硕士研究生, 研究方向为空气吸热器结构优化, 1061094586@qq.com" ]
张燕平(1971), 女, 博士, 副教授, 主要从事太阳能热发电系统设计优化方面的研究, 本文通信作者, zyp2817@hust.edu.cn
- 基金信息：国家重点研发计划项目(2018YFE0127500);湖北省技术创新专项(2019AAA017)
DOI：10.12096/j.2096-4528.pgt.21096
中图分类号： TK513收稿：2021-07-30，
纸质出版：2021-12-31
- 稿件说明：
移动端阅览
王鼎, 陈宇轩, 肖虎, 等. 采用不同传热工质的锥形腔式吸热器传热特性对比分析[J]. 发电技术, 2021,42(6):682-689.
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.
王鼎, 陈宇轩, 肖虎, 等. 采用不同传热工质的锥形腔式吸热器传热特性对比分析[J]. 发电技术, 2021,42(6):682-689. DOI： 10.12096/j.2096-4528.pgt.21096.
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
2
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
2
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
2
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
2
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.
关键词
Keywords
references
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