2018 AIChE Annual Meeting
(6du) Experimental Investigation on Different Baffles of Shell-and-Tube Heat Exchanger
Authors
Research
Interests: different baffles of shell-and-tube heat exchanger
Teaching
Interests: flow and heat transfer
Experimental investigation on different
baffles of shell-and-tube heat exchanger
Key
Laboratory of Thermo-Fluid Science & Engineering, MOE, School of Energy and
Power Engineering, Xi¡¯an Jiaotong University, Xi¡¯an
710049, Shaanxi, China
Shell-and-tube
heat exchanger is a common heat exchange equipment in
industry. Among them, the segmental baffle heat exchanger is the basic
shell-and-tube heat exchanger, which has simple structure, convenient
processing and manufacturing features. With the development of the times and
the progress of science and technology, people have higher requirements for
energy efficiency, and have developed various types of heat exchangers to
compensate for the insufficient on heat transfer performance and pressure drop
characteristics of the segmental baffle heat exchanger.
However,
the study of new heat exchangers is mostly limited to numerical simulation
methods, and there is no systematic study and comparison of the performance of
different heat exchangers.
In
this paper, the experimental system is verified by the traditional segmental
baffle heat exchanger. An experimental study is carried out on four heat
exchangers with different baffles, in which the inner diameter of the shell
side and tubes are the same and the adjacent baffle distance is equal.
The
results indicate that the heat transfer coefficient of the rod baffle, the orifice
plate, the small hole heat exchanger and the segmental baffle heat exchanger
are all increased with increasing flow rate at the shell side while the flow
rate at the tube side remains constant; and the pressure drop of the four kinds
of heat exchangers increased rapidly with the increase of the shell side flow
rate. In general, the pressure drop of the other three heat exchangers is lower
than that of the segmental baffle heat exchanger. In terms of the shell side
heat transfer coefficient, the orifice plate is the best, the segmental baffle
is the next, the small hole is the third, and the rod baffle is the worst. However,
the effect of the rod baffle heat exchanger is the strongest, when taking the
shell side heat transfer coefficient per unit pressure drop into consideration.
Key
Words: Shell-and-tube heat exchanger; Experimental investigation; Different
baffles