Abstract:
One of the many kinds of heat exchangers that are used in industry is the Shell and Tube Heat
Exchangers (STHE). According to estimates, more than 35 to 40 percent from heat exchangers are
shell and tube systems and mostly constructed with segmental baffle and without baffle. Design of
STHEs basically determines the heat transfer rate, and check for pressure drops of both shell and
tube side fluid stream. For efficient heat transfer rate the pressure drop must be below allowable
pressure drop which guarantee turbulence. One of the factors which causes pressure drop is baffle
arrangement. Baffle is the component of STHE that used to support and prevent vibration of the
tubes. However, it causes a turbulence in shell side fluid flow and increases the heat transfer
coefficient. The main purpose of this study was to analysis the effect of helical baffle on the
performance of STHE using CFD for Dashen Brewery Industry. In Modeling and simulation
analysis of STHE constructed with segmental baffle, helical baffle and without baffle was
developed using ANSYS 19.2 and comparative and validation analysis have been carried out. The
result of simulation revels the heat transfer rate and pressure drop in both segmental, helical and
without baffle STHE. In the comparative analysis, the performance of STHE constructed with
helical baffle was 12.43 % higher than segmental baffle and 20.08 % without baffle. To increase
the performance helical baffle STHE optimization analysis also investigated by orientation of
baffle with helix angle of 8°, 10°and 12° and 8° have 1.13 % effective than 10°. Also, from the
validation analysis the current study analysis have been valid and the previous study have supports
to the current study analysis. As a final conclusion, the capacity of STHE developed with helical
baffles have 90.5 % higher than the existing STHE in Dashen Brewery Industry. And the current
study of STHE constructed with continuous helical baffle have better performance than the
previous study of dis continuous helical baffle STHE by Asghar Ali Ghoto et.al. Furthermore, the
industry have gotten much profitable with a simultaneous decreasing of heat exchanger area, inlet
flow rates and pressure drop.
