Publicado 18 números por año
ISSN Imprimir: 1064-2285
ISSN En Línea: 2162-6561
Indexed in
NUMERICAL INVESTIGATION OF COMBINED PARALLEL TWO SHELL-PASS SHELL-AND-TUBE HEAT EXCHANGERS WITH CONTINUOUS HELICAL BAFFLES
SINOPSIS
A combined parallel two shell-pass shell-and-tube heat exchanger with continuous helical baffles (CPTP-STHX) and an improved model (CPTP-STHX-improved) have been proposed to improve the heat transfer performance of shell-and-tube heat exchangers (STHXs). It is found that proportion of the mass flow rate of the inner shell pass to the total mass flow rate of the shell side is a constant. The heat transfer performance increases with the resistance of the inner shell pass. The CPTP-STHX-improved is compared with a conventional STHX with segmental baffles (SG-STHXs) by means of the computational fluid dynamic (CFD) method. The numerical results show that for the same mass flow rate m in the shell side, the heat transfer coefficient h, the overall pressure drop Δp, and the heat transfer coefficient per pressure drop h/Δp of the CPTP-STHX-improved are 41.1%, 34.5%, and 4.9% higher than those of the SG-STHX, respectively. For the same overall pressure drop in the shell side, the heat transfer coefficient of the CPTP-STHX-improved has 23.1% increases than that of the SG-STHX. Based on these results, it can be concluded that the CPTP-STHX-improved might be used to replace the conventional STHX with segmental baffles in industrial applications.
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Li Shi Wei, Wang Zheng Fang, Numerical Controlled Process of Tube Plate and Baffles on Tubular Heat Exchangers, Advanced Materials Research, 462, 2012. Crossref
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Lai Xue Jiang, Li Rui, Dai Yong, Huang Su Yi, Experimental Study on Integrated Performance for Flower Baffle Heat Exchanger’s Distance between Two Flower Baffles, Applied Mechanics and Materials, 29-32, 2010. Crossref