Numerical investigation on combined multiple shell-pass shell-and-tube heat exchanger with continuous helical baffles |
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| Authors: | Qiuwang Wang Qiuyang Chen Guidong Chen Min Zeng |
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| Affiliation: | 1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China;2. National Engineering Research Center for Distillation Technology, Tianjin University, Tianjin, PR China;1. Laboratoire des Carburants Gazeux et Environnement, Faculté de Génie Mécanique, Université des Sciences et de la Technologie d’Oran, USTO-MB, BP1505, El-M’Naouer, Oran 31000, Algeria;2. Institut des Sciences et Technologies, Centre Universitaire Salhi Ahmed (Ctr Univ Naâma), BP 66, 45000 Naâma, Algeria;1. School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;2. School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China;3. Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;1. College of Science and Technology of Tangier, Abdelmalek Esaadi University, Tangier, Morocco;2. College of Science and Technology of Mohammadia, Hassan II University, Casablanca, Morocco;3. Renewable Energy and Advanced Materials Laboratory, International University of Rabat, Sale, Morocco |
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| Abstract: | A combined multiple shell-pass shell-and-tube heat exchanger (CMSP-STHX) with continuous helical baffles in outer shell pass has been invented to improve the heat transfer performance and simplify the manufacture process. The CMSP-STHX is compared with the conventional shell-and-tube heat exchanger with segmental baffles (SG-STHX) by means of computational fluid dynamics (CFD) method. The numerical results show that, under the same mass flow rate M and overall heat transfer rate Qm, the average overall pressure drop Δpm of the CMSP-STHX is lower than that of conventional SG-STHX by 13% on average. Under the same overall pressure drop Δpm in the shell side, the overall heat transfer rate Qm of the CMSP-STHX is nearly 5.6% higher than that of SG-STHX and the mass flow rate in the CMSP-STHX is about 6.6% higher than that in the SG-STHX. The CMSP-STHX might be used to replace the SG-STHX in industrial applications to save energy, reduce cost and prolong the service life. |
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