摘要
作为超临界二氧化碳(S-CO_(2))动力循环中的关键换热设备,印刷电路板式换热器(PCHE)对S-CO_(2)循环效率有着重要影响。为了提升S-CO_(2)循环效率,本文首先建立了PCHE的设计计算模型,并与文献数据进行对比验证了其可靠性;基于此,分析了水力直径与通道数量等关键几何参数对平直翅片和翼型翅片2种典型PCHE流动与换热性能的影响规律;进一步,详细考察了翼型翅片PCHE内部流场分布特性;最后,对装机功率为兆瓦级的S-CO_(2)熔盐光热电站中的4种主要换热器分别进行了设计计算。结果表明,本文建立的PCHE设计计算模型具有较高的可靠性,可用于S-CO_(2)等工质的PCHE的设计与优化。
Compact heat exchangers, represented by printed circuit heat exchanger(PCHE), are essential heat exchanging devices in the supercritical carbon dioxide(S-CO_(2)) power cycle and have an important influence on cycle efficiency. To achieve the optimal design of S-CO_(2)PCHE, a design calculation model of PCHE is established and verified by comparing to reference data. Based on this model, the influence of two crucial parameters, hydraulic diameter and channel amount, is analyzed. Then, the distribution of velocity field is studied detailly. Finally, design of 4 typical heat exchangers is conducted for a 1 MWe molten salt solar power tower plant with S-CO_(2)power cycle.The results indicated that the design model achieves high reliability and can be used in the design and optimization of PCHE of various working media.
作者
丁源
童自翔
王文奇
曹锋
DING Yuan;TONG Zixiang;WANG Wenqi;CAO Feng(Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education,School of Energy&Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2022年第5期1351-1356,共6页
Journal of Engineering Thermophysics
基金
国家科技重大专项(No.2017-III-0005-0029)
国家自然科学基金青年基金项目(No.51906186)。
关键词
印刷电路板式换热器
设计计算
超临界二氧化碳
太阳能光热电站
printed circuit heat exchanger
design calculation
supercritical carbon dioxide
concentrated solar power plant
