Numerical study on impact behavior of nanoparticle shapes on the performance improvement of shell and tube heat exchanger

2017 ◽  
Vol 125 ◽  
pp. 449-460 ◽  
Author(s):  
Hassan Hajabdollahi ◽  
Zahra Hajabdollahi
Keyword(s):  
Heat Exchanger ◽  
Performance Improvement ◽  
Numerical Study ◽  
Impact Behavior ◽  
Tube Heat Exchanger ◽  
Shell And Tube ◽  
Nanoparticle Shapes

Thermal Performance Enhancement of an Industrial Shell and Tube Heat Exchanger

2015 ◽  
Author(s):  
Fadi A. Ghaith ◽  
Ahmed S. Izhar
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Heat Exchanger ◽  
Transfer Coefficient ◽  
Thermal Performance ◽  
Numerical Study ◽  
Thermal Design ◽  
Shell Side ◽  
Tube Heat Exchanger ◽  
Shell And Tube

This paper aims to enhance the thermal performance of an industrial shell-and-tube heat exchanger utilized for the purpose of cooling raw natural gas by means of mixture of Sales gas. The main objective of this work is to provide an optimum and reliable thermal design of a single-shelled finned tubes heat exchanger to replace the existing two- shell and tube heat exchanger due to the space limitations in the plant. A comprehensive thermal model was developed using the effectiveness-NTU method. The shell-side and tube-side overall heat transfer coefficient were determined using Bell-Delaware method and Dittus-Boelter correlation, respectively. The obtained results showed that the required area to provide a thermal duty of 1.4 MW is about 1132 m2 with tube-side and shell-side heat transfer coefficients of 950 W/m2K and 495 W/m2K, respectively. In order to verify the obtained results generated from the mathematical model, a numerical study was carried out using HTRI software which showed a good match in terms of the heat transfer area and the tube-side heat transfer coefficient.

Numerical Study of Flow Induced Vibration of the Tube Bundle in a Lash Baffle Shell-and-Tube Heat Exchanger

2013 ◽  
Author(s):  
Haiyang Sun ◽  
Caifu Qian
Keyword(s):  
Heat Exchanger ◽  
Numerical Study ◽  
Tube Bundle ◽  
Lateral Displacement ◽  
Small Hole ◽  
Flow Induced Vibration ◽  
Tube Heat Exchanger ◽  
New Type ◽  
Shell And Tube ◽  
Jet Characteristics

In this paper, flow induced vibration of the tube bundle in a shell-and-tube heat exchanger with a new type of baffle, namely large-and-small-hole or LASH baffle, is studied numerically and compared with that in a segmental baffle shell-and-tube heat exchanger. It is found that as a parallel flow with jet characteristics between the large holes and tubes conducted by the LASH baffles, the fluid-induced vibration of tube bundle in the LASH baffle heat exchanger can be prevented and the lateral displacement variation is greatly decreased.

Sign in / Sign up

Export Citation Format

Share Document