【摘要】 换热器传热强化在换热网络中的应用可以解决现有换热网络改造中的瓶颈问题,在热回收系统配置没有过多结构改造的条件下,可以达到明显的节能及降低成本的目的;同时,在换热网络设计中,换热器传热强化技术的应用可以降低设备投资,实现更好的经济效果。本文首先通过文献检索数据说明了在换热网络改造和设计中考虑传热强化技术的研究在近5年得到了研究者的关注。然后概述了管壳式换热器传热强化的基本原理及主要方式,分析了传热强化技术的应用对换热器传热性能的影响,系统总结了管壳式换热器传热强化技术的分类和强化效果。进一步从设计和改造两个方面,对换热网络优化中考虑管壳式换热器传热强化的应用研究进行了综述,展示了传热强化对换热网络设计和改造的效果和优势。最后对下一步的研究进行了展望,指出可进一步探究换热器传热强化设备几何尺寸和换热网络同步优化、传热强化和换热器详细设计同步优化等。更多还原

【Abstract】 The implementation of enhanced heat transfer technology in heat exchangers can solve the bottleneck problem in the existing heat exchanger network(HEN)retrofit. Without excessive structural transformation in the heat recovery system,the use of heat transfer enhancement technology can achieve significant energy savings and reduce costs. At the same time,in the design of HEN,the application of heat transfer enhancement technology in heat exchangers can reduce the investment of equipment and achieve better economic effect. Firstly,through the literature retrieval data,the research on heat transfer enhancement in heat transfer network retrofit and design has been paid attention by researchers in the last 5 years. Then,the basic principles and main methods of heat transfer enhancement of shell and tube heat exchangers(STHE)were summarized. The effect of heat transfer enhancement technology on heat transfer performance of heat exchanger was analyzed. The classification of heat transfer enhancement technology and the enhancement effect of STHE were summarized. From the two aspects of design and retrofit,the application research of heat transfer enhancement of STHE considering in the optimization of HEN was summarized. The effect and advantage of heat transfer enhancement on HEN design and retrofit were presented. Finally,the future research,the simultaneous optimization of heat transfer enhancement device geometry of STHE and HEN,as well as simultaneous optimization of heat transfer enhancement and detailed design of heat exchanger was prospected.更多还原