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RS-DFID非洲能力建设倡议计划拨款:利用高性能集中太阳能发电系统中不稳定的相变热交换

Benedict Winchester^1,2,3, Abdullah M Maghrabi¹, Christos N Markides¹

¹Clean Energy Processes (CEP) Laboratory and the Sargent Centre for Process Systems Engineering, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.

Interface focus

|August 12, 2024

概括

这项研究通过改善传热表面和流动动力学来推进集中太阳能 (CSP) 技术. 调查结果表明,整合固体存储介质可以显著提高CSP工厂的经济价值.

科学领域:

热力学是一种热力学.
流体力学流体力学流体力学
可再生能源工程可再生能源工程

背景情况:

撒哈拉以南非洲大学和伦敦帝国理工学院的联盟合作推进直接蒸汽发电集中太阳能发电 (CSP) 技术.
该项目旨在在参与的非洲大学内建立CSP研究和开发的能力.

研究的目的:

为了产生关于直接蒸汽发电CSP工厂的新知识.
提高对CSP系统中双相流动力学和热传递的理解.
评估将固体存储介质与CSP工厂集成的经济可行性.

主要方法:

开发了一个改进的流量分类方案,用于双相,液体-液体流.
测试了先进的表面,包括纳米FLUX,以提高稳定状态传热性能.
首次对瞬流沸热传递系数 (HTCs) 进行了首次测量.
应用激光诱导光 (LIF) 技术,用于精确测量环状流中的薄膜厚度.
模拟了固体存储介质的集成到一个案例研究CSP工厂.

主要成果:

与使用R-134a/R-245fa.的其他表面相比,纳米FLUX表面在池沸中显示出高达200%的传热系数 (HTCs).
在R-245fa.的水平管道中,过渡流沸HTC在步骤扰动下低于预期的高达30%.
一种适应的平面LIF技术在局部即时薄膜厚度测量中实现了<10%的不确定性.
预测表明,一个集成固体储存的CSP工厂的净当前价值将增加约80%.

结论:

先进的表面和改进的流量分类显著提高了CSP的热性能.
精确测量短暂现象对于可靠的CSP系统设计至关重要.
集成固体存储介质为CSP工厂提供了巨大的经济机会.

关键词:

能力建设能力建设.集中式太阳能发电是一种集中式太阳能发电.通过直接蒸汽发电来产生蒸汽.可再生能源可再生能源的能源.太阳能发电太阳能发电就是太阳能.

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