Research progress of heat transfer enhancement of shell-and-tube heat exchanger

doi:10.16085/j.issn.1000-6613.2017-2483

Abstract

Abstract: As the most widely used heat exchangers in engineering,shell-and-tube heat exchangers have the advantages of strong structure,high adaptability,ability to utilize and recover heat energy and so on. Under the background of pursuing high-energy efficiency,the heat transfer enhancement of heat exchangers has attracted wide attention. This article mainly focuses on the research progress of heat transfer enhancement of shell and tube heat exchanger,including the optimization of geometry of the heat exchanger,the improvement of thermal properties of the flowing fluid and the combination of multiple heat transfer enhancement techniques. Among them,the geometry optimization mainly includes changing the surface of the heat transfer tubes,adding inserts into tubes,and optimizing the baffles in the shell side. The optimization of the physical properties of flowing fluid mainly focus on the improvement of thermal conductivity of nanofluids,and improvement of heat capacity of latent heat fluid and so on. Integrated enhanced heat transfer technique combined different enhancement methods to fill the gap and achieve higher heat transfer rate. Finally,it is pointed out that the research direction of the heat transfer enhancement of shell and tube heat exchanger in the future lies in developing enhanced tubes and steady nanofluids and latent heat fluid,and the combination of a variety of ways to strengthen the heat transfer effect.

Key words: shell-and-tube heat exchanger, heat transfer enhancement, helical baffles, nanofluids, latent heat fluid

摘要： 管壳式换热器作为工程中应用广泛的换热器，具有结构坚固、适应性强、能够利用和回收热能等优点。在追求高能源利用效率的背景下，换热器的强化传热得到广泛关注。本文重点阐述了管壳式换热器的强化传热相关研究进展，包括换热器本身几何结构的优化、换热流体的热物性改善以及多种强化传热技术结合的复合强化传热方法。其中几何结构优化主要包括改变换热管管型、增加管内插入物以及壳程中的隔板优化研究等。换热流体热物性改善包括纳米流体提高热导率、潜热型热流体提高比热容等。复合强化传热是将多种强化方法结合，可弥补单一方法的不足，以获得更高强化传热效果。最后指出管壳式换热器强化传热未来的研究方向在于持续开发强化传热管、制备稳定的纳米流体及潜热型流体以及多种强化方式复合提高强化效果。

关键词: 管壳式换热器, 传热强化, 螺旋隔板, 纳米流体, 潜热型热流体

CLC Number:

TK172

LIN Wenzhu, CAO Jiahao, FANG Xiaoming, ZHANG Zhengguo. Research progress of heat transfer enhancement of shell-and-tube heat exchanger[J]. Chemical Industry and Engineering Progress, 2018, 37(04): 1276-1286.

林文珠, 曹嘉豪, 方晓明, 张正国. 管壳式换热器强化传热研究进展[J]. 化工进展, 2018, 37(04): 1276-1286.

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