微管壳式换热器在能量转换循环中的应用  

Investigation on the application of microtube and shell heat exchanger in energy conversion cycle

作　　者：高娇 丁文杰[1] 黄洪文[1] 郭海兵[1] 马纪敏[1] 王少华[1] Gao Jiao;Ding Wenjie;Huang Hongwen;Guo Haibing;Ma Jimin;Wang Shaohua(Institute of Nuclear Physics and Chemistry,CAEP,Mianyang 621999,China)

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621999

出　　处：《强激光与粒子束》2023年第11期122-131,共10页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(22209159)。

摘　　要：目前,超临界二氧化碳(S-CO_(2))布雷顿循环普遍采用印刷电路板换热器(PCHE)来保证其相对其他能量转换循环的紧凑性优势。PCHE芯体为整体结构,若内部出现泄漏或结垢等问题,很难进行维护与检修。本文提出了一种微管壳式换热器(MSTE),其结构与传统管壳式换热器类似,但其管径缩小至微通道级。由于MSTE的流道横截面积占总截面积之比较PCHE大,在典型的回热器与冷却器设计工况下,相对PCHE而言,采用MSTE可将体积与质量均减小30%以上。灵敏性分析结果显示,采用本文设计的MSTE结构的回热器与冷却器,回热器冷热流道入口温度升高20℃左右,压缩机入口温度变化均不超过1℃,说明该种结构换热器的换热能力足够支撑能量转换循环的一般工况波动。Print circuit heat exchanger(PCHE)is widely used in the present supercritical carbon dioxide(SCO_(2))Brayton cycle to support its superiority in compactness when compared with other energy conversion cycles.The maintenance and overhaul of PCHE are hard to be carried out when leakage and fouling appear because of the integral structure of the core.A microtube and shell heat exchanger(MSTE)is proposed in this research.The structure of the MSTE is similar to that of the conventional shell-and-tube heat exchanger except that the tube diameter is reduced to microchannel level.The cross-section area of the flow channel in MSTE takes more counts than that in PCHE,thus the volume and weight of MSTE can be reduced by more than 30%when compared with PCHE under typical design conditions of recuperator and precooler.Sensitivity analysis results show that if the designed recuperator and precooler with MSTE structure are adopted,the inlet temperature of compressor changes less than 1℃when the hot or cold inlet temperature of recuperator increased by about 20℃.It can be concluded from the analysis results that the heat transfer capacity of MSTE is sufficient to adjust the general working condition fluctuations of the energy conversion cycle.

关 键 词：微管壳式换热器 超临界二氧化碳 回热器 冷却器 

分 类 号：TL33[核科学技术—核技术及应用]