Open Access
Multidimensional numerical modeling of heat exchangers
W. T. Sha,C. I. Yang,T. T. Kao,S. M. Cho +3 more
- Vol. 83, pp 34258
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TLDR
In this article, a multidimensional, thermal-hydraulic model is developed for the analysis of shell-and-tube heat exchanges for liquid metal services, where the conservation equations of mass, momentum and energy for continuum fluids are modified using the concept of porosity, surface premeability and distributed resistance to account for the blockage effects due to the presence of heat transfer tubes.Abstract:
A comprehensive, multidimensional, thermal-hydraulic model is developed for the analysis of shell-and-tube heat exchanges for liquid metal services. For the shellside fluid, the conservation equations of mass, momentum and energy for continuum fluids are modified using the concept of porosity, surface premeability and distributed resistance to account for the blockage effects due to the presence of heat transfer tubes, flow baffles/shrouds, the support plates, etc. On the tubeside, heat transfer tubes are connected in parallel between the inlet and outlet plenums, and tubeside flow distribution is calculated based on the plenum-to-plenum pressure difference being equal for all tubes. It is assumed that the fluid remains single-phased on the shell side and may undergo phase-change in the tube side, thereby simulating the conditions of Liquid Metal Fast Breeder Reaction (LMFBR) intermediate heat exchanges (IHX) and steam generators (SG). The analytical model predictions are compared with three sets of test data (one for IHX and two for SG) and favorable results are obtained, thus providing a limited validation of the model.read more
Citations
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Journal ArticleDOI
Shell side CFD analysis of a small shell-and-tube heat exchanger
Ender Ozden,Ilker Tari +1 more
TL;DR: In this article, a set of CFD simulations for a single shell and single tube pass heat exchanger with a variable number of baffles and turbulent flow were performed, and the best turbulence model among the ones considered was determined by comparing the CFD results of heat transfer coefficient, outlet temperature and pressure drop with the Bell-Delaware method results.
Journal ArticleDOI
3D numerical simulation on shell-and-tube heat exchangers with middle-overlapped helical baffles and continuous baffles – Part I: Numerical model and results of whole heat exchanger with middle-overlapped helical baffles
TL;DR: In this paper, a 3D numerical simulation of a whole heat exchanger with middle-overlapped helical baffles is carried out by using commercial codes of GAMBIT 2.3 and FLEUNT 6.3.
Journal ArticleDOI
Three dimensional numerical simulation of shell-and-tube heat exchangers. Part I: Foundation and fluid mechanics
M. Prithiviraj,M. J. Andrews +1 more
TL;DR: In this paper, a three-dimensional numerical model using the distributed resistance method along with volumetric porosities and surface permeabilities is used to model the tubes in the heat exchanger.
Journal ArticleDOI
3D numerical simulation on the shell side heat transfer and pressure drop performances of twisted oval tube heat exchanger
TL;DR: In this article, the authors analyzed the influence of twisted pitch length P and aspect ratio A/B on the performance of the shell side of twisted oval tube heat exchanger and found that the intensity of spiral flow becomes more and more drastic with the increasing of A and decreasing of P.
Journal ArticleDOI
A comparison of four numerical modeling approaches for enhanced shell-and-tube heat exchangers with experimental validation
TL;DR: In this article, a rod-baffle shell-and-tube heat exchanger with four different modeling approaches are developed and validated with experimental results, and the results illustrate that the porous model, porous model and whole model can have high accuracy in predicting heat transfer.
References
More filters
Journal ArticleDOI
Shell side CFD analysis of a small shell-and-tube heat exchanger
Ender Ozden,Ilker Tari +1 more
TL;DR: In this article, a set of CFD simulations for a single shell and single tube pass heat exchanger with a variable number of baffles and turbulent flow were performed, and the best turbulence model among the ones considered was determined by comparing the CFD results of heat transfer coefficient, outlet temperature and pressure drop with the Bell-Delaware method results.
Journal ArticleDOI
3D numerical simulation on shell-and-tube heat exchangers with middle-overlapped helical baffles and continuous baffles – Part I: Numerical model and results of whole heat exchanger with middle-overlapped helical baffles
TL;DR: In this paper, a 3D numerical simulation of a whole heat exchanger with middle-overlapped helical baffles is carried out by using commercial codes of GAMBIT 2.3 and FLEUNT 6.3.
Journal ArticleDOI
Three dimensional numerical simulation of shell-and-tube heat exchangers. Part I: Foundation and fluid mechanics
M. Prithiviraj,M. J. Andrews +1 more
TL;DR: In this paper, a three-dimensional numerical model using the distributed resistance method along with volumetric porosities and surface permeabilities is used to model the tubes in the heat exchanger.
Journal ArticleDOI
3D numerical simulation on the shell side heat transfer and pressure drop performances of twisted oval tube heat exchanger
TL;DR: In this article, the authors analyzed the influence of twisted pitch length P and aspect ratio A/B on the performance of the shell side of twisted oval tube heat exchanger and found that the intensity of spiral flow becomes more and more drastic with the increasing of A and decreasing of P.
Journal ArticleDOI
A comparison of four numerical modeling approaches for enhanced shell-and-tube heat exchangers with experimental validation
TL;DR: In this article, a rod-baffle shell-and-tube heat exchanger with four different modeling approaches are developed and validated with experimental results, and the results illustrate that the porous model, porous model and whole model can have high accuracy in predicting heat transfer.