%0 Journal Article
%A Yang, Jian-Feng
%A Wang, Qiu-Wang
%A Zeng, Min
%D 2016
%I Begell House
%K continuous helical baffles, combined parallel two shell-pass shell-and-tube heat exchangers (CPTP-STHXs), segmental baffles, heat transfer, comprehensive performance
%N 6
%P 575-595
%R 10.1615/HeatTransRes.2016008224
%T NUMERICAL INVESTIGATION OF COMBINED PARALLEL TWO SHELL-PASS SHELL-AND-TUBE HEAT EXCHANGERS WITH CONTINUOUS HELICAL BAFFLES
%U http://dl.begellhouse.com/journals/46784ef93dddff27,6f121ca8263f1e7d,5012c80c6372e3ed.html
%V 47
%X 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.
%8 2016-07-13