Numerical Analysis of Heat Transfer and Flow Loss in a Parallel Plate Heat Exchanger Element With Longitudinal Vortex Generators as Fins

1995 ◽  
Vol 117 (4) ◽  
pp. 1064-1067 ◽  
Author(s):  
M. Fiebig ◽  
Th. Gu¨ntermann ◽  
N. K. Mitra
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Numerical Analysis ◽  
Parallel Plate ◽  
Plate Heat Exchanger ◽  
Vortex Generators ◽  
Longitudinal Vortex ◽  
Plate Heat ◽  
Flow Loss

Experimental and numerical analysis of a plate heat exchanger using variable heat transfer coefficient

2021 ◽  
pp. 1-19
Author(s):  
Muhammad Ahmad Jamil ◽  
Talha S. Goraya ◽  
Haseeb Yaqoob ◽  
Muhammad Wakil Shahzad ◽  
Syed M. Zubair
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Heat Exchanger ◽  
Numerical Analysis ◽  
Transfer Coefficient ◽  
Plate Heat Exchanger ◽  
Plate Heat ◽  
Variable Heat

scholarly journals Numerical Analysis with Experimental Validation of Single-Phase Fluid Flow in a Dimple Pattern Heat Exchanger Channel

2020 ◽  
Vol 66 (9) ◽  
pp. 544-553
Author(s):  
Urban Močnik ◽  
Bogdan Blagojevič ◽  
Simon Muhič
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Numerical Analysis ◽  
Single Phase ◽  
Flow Characteristics ◽  
Turbulence Models ◽  
Plate Heat Exchanger ◽  
Low Velocity ◽  
Plate Heat ◽  
Phase Water

A plate heat exchanger with a dimple pattern heat plate has a large number of dimples. The shape of dimples defines the characteristics of the plate heat exchanger. Although such heat exchangers have become increasingly popular due to their beneficial characteristics, knowledge of the flow characteristics in such kind of channel is poor. A good knowledge of the flow conditions inside of such channel is crucial for the successful and efficient development of new products. In this paper single-phase water flow in dimple pattern plate heat exchanger was investigated with application of computational fluid dynamics and laboratory experiments. Numerical analysis was performed with two turbulence models, Realizable - with enhanced wall treatment function and - SST. The first predicts a slightly smaller pressure drop and the second slightly larger compared to the results of laboratory measurements. Our research found that despite the relatively low velocity of the fluid, turbulent flow occurs in the channel due to its shape. We also found that there are two different flow regimes in the micro plate heat exchanger channel. The first regime is the regime that dominates the heat transfer, and the second is the regime where a recirculation zone appears behind the brazing point, which reduces the surface for heat transfer. The size of the second regime does not change significantly with the velocity of the fluid in the volume considered.

scholarly journals Numerical simulation of the effect of plate spacing on heat transfer characteristics within a parallel-plate heat exchanger in a standing wave thermoacoustic system

2019 ◽  
Vol 116 ◽  
pp. 00028
Author(s):  
Haoran Huang ◽  
Artur Jaworski
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Parallel Plate ◽  
Plate Heat Exchanger ◽  
Transition To Turbulence ◽  
Adjacent Area ◽  
Heat Transfer Characteristics ◽  
Plate Heat ◽  
Transfer Characteristics ◽  
Plate Spacing

Power can be converted with high efficiently between thermal energy and mechanical (acoustic) energy by using thermoacoustic technologies. Thus, the heat transfer characteristics are significant to the understanding of mechanisms, and improvement of efficiency for thermoacoustic devices, notably in heat exchangers. This paper introduces a two-dimensional computational fluid dynamics model of flow across a parallel-plate heat exchanger and investigates the effect of plate spacing on heat transfer characteristics. The open source CFD software OpenFOAM is applied because of the highly customizable capabilities to vary the control parameters. Firstly, the computational model including geometry, boundary conditions, equations, discretization scheme, turbulence and thermophysical properties’ models are presented, and then grid-independence validation is presented to verify the quality of mesh. The simulation results show that plate spacing influences the heat transfer between plates and adjacent area of heat exchanger, and the heat transfer coefficient goes up when the plate spacing decreases. The analysis also indicates that a possible flow transition to turbulence occurred within Re number between 247.2 and 321.4. The results in this work can help the understanding of heat transfer inside thermoacoustic system, and form a basis for future research.

Numerical analysis of heat transfer in a plate heat exchanger

2008 ◽  
Vol 8 (7/8) ◽  
pp. 406 ◽  
Author(s):  
Nahmkeon Hur ◽  
Myungsung Lee ◽  
Byung Ha Kang ◽  
Chan Shik Won
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Numerical Analysis ◽  
Plate Heat Exchanger ◽  
Plate Heat

A Numerical Analysis for the Flow and Heat Transfer in a Large Plate Heat Exchanger by Using a Porous Media Approach

2011 ◽  
Author(s):  
Myungsung Lee ◽  
Jae Hyuk Jung ◽  
Nahmkeon Hur
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Heat Exchanger ◽  
Numerical Analysis ◽  
Plate Heat Exchanger ◽  
Microscopic Method ◽  
Plate Heat ◽  
Large Plate ◽  
Flow And Heat Transfer ◽  
Overall Performance

A numerical analysis was conducted to investigate the flow and heat transfer in a large plate heat exchanger. For the purpose of investigation on the whole flow field inside a large plate heat exchanger, the microscopic method by using actual geometry is not practical since it requires huge computational resources. In the present study, a semi-microscopic method by using a porous media approach has been adopted in order to predict the overall flow and heat transfer performance for the large plate heat exchanger. The pressure drop and heat transfer characteristics of the flow passages inside the heat exchanger was obtained first from the microscopic simulation for the flow inside passages and heat transfer through the plates by using the detailed geometry of one representative repeating section of the heat transfer plate. These results were used as characteristics of the porous media replacing the complex flow passages to simulate the large plate heat exchanger as a whole. The overall performance predicted from the semi-microscopic method agrees well with available experimental data. The numerical method in the present study can be applicable to the different types of large heat exchangers that have complex geometry in order to predict the overall performance.

Sign in / Sign up

Export Citation Format

Share Document