کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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173232 | 458582 | 2011 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effects of fouling on performance of retrofitted heat exchanger networks: A thermo-hydraulic based analysis Effects of fouling on performance of retrofitted heat exchanger networks: A thermo-hydraulic based analysis](/preview/png/173232.png)
The energy recovery performance of crude pre-heat trains (PHTs) in oil refineries is typically impaired by deposition over time of fouling on the thermal surfaces. Such time varying effects are normally not considered in the design or retrofit of heat exchangers networks. In this paper, the importance of taking into account such effects is demonstrated, by means of a case study. An existing industrial PHT network is simulated using a dynamic, distributed mathematical model for shell-and-tube heat exchangers undergoing crude oil fouling. To systematically assess the impact of fouling at the network level, several key performance indicators are proposed and used to analyse three retrofit options aimed at maximising overall heat recovery. Simulation results show that network designs that maximise energy recovery at steady state are not the best when fouling occurs. It is concluded that a proper retrofit design must include consideration of time varying fouling effects.
Journal: Computers & Chemical Engineering - Volume 35, Issue 5, 11 May 2011, Pages 907–917