综合考虑换热器传热、压降和结垢性能的换热网络优化方法

项目名称： 综合考虑换热器传热、压降和结垢性能的换热网络优化方法

项目编号： No.21306228

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 化学工业

项目作者： 王彧斐

作者单位： 中国石油大学（北京）

项目金额： 26万元

中文摘要： 换热网络是过程工业中重要的能量子系统，它的热回收效率直接影响着整个装置的节能效果。 在近几十年相继提出许多针对换热网络集成优化的方法，然而这些传统方法仅针对网络这一尺度进行研究。将换热器尺度和换热网络尺度集成起来进行研究，可以进一步完善换热网络优化方法，并推动化工系统工程的发展。本课题通过流速这一变量，从研究换热器内流体的流速对换热器内换热、压降和结垢的综合性能的影响入手，进而从网络集成的角度，研究流速对网络中不同位置的换热器的影响，将细节的换热器设计和宏观的换热网络集成结合在一起。以此为基础，识别换热网络中的传热瓶颈、压降瓶颈与结垢瓶颈，并进一步探求这三个瓶颈之间的交互作用。最终实现对于换热网络的传热，压降与结垢性能的综合优化。

中文关键词： 换热网络；优化；压降；结垢；流速

英文摘要： Heat exchanger networks play an important role in process industries. The energy recovery efficiency of a heat exchanger network has great impact on the energy saving performance of the process. Many synthesis methods for heat exchanger networks have been proposed during the last three decades. However, conventional heat exchanger network synthesis methods normally aim at the network scale. Researching heat exchanger network synthesis by integrating the heat exchanger scale and heat exchanger network scale can further improve network optimization methodology and promote the development of chemical system integration. To consider heat exchanger scale, this project uses flow velocity of streams as a medium to correlate the performance of pressure drop, heat transfer and fouling rate. Then, how the flow velocity affects the heat exchangers in different position of a network will be studied. By doing this, the detailed heat exchanger design and the network integration can be combined. Based on the consideration of flow velocity, the bottlenecks of heat transfer, fouling and pressure drop can be identified. After that, the correlation of these bottlenecks is further explored. After all, the optimization of heat exchanger network considering fouling and pressure drop can be achieved.

英文关键词： Heat exchanger network；optimization；pressure drop；fouling；flow velocity