<abstract xmlns="http://www.w3.org/1999/xhtml">

For the proper estimation of the plate number (N) of a plate heat exchanger (PHE) – in addition to the flow rates and thermophysical properties of fluids –, an appropriate correlation is needed for convective heat transfer coefficient (α) calculation. When one does not have a criterial equation for the corresponding plate shape, we propose a selecting method for α. With the suggested relationships from literature, we calculate the plate number of a geometrically known, similar heat duty PHE and choose those relationships that give the same plate number with the known heat exchanger. In our case study, the plate number determined by any of the screened equations for whole milk preheating has almost the same value (n = 10 ± 1) regardless of the method used to solve the PHE model (plate efficiency and Nconverg or Kconverg convergence methods). For liquids’ thermophysical property estimation, we recommend averaging the values given by equations from literature, followed by equation fitting.
</abstract>

For the proper estimation of the plate number (N) of a plate heat exchanger (PHE) – in addition to the flow rates and thermophysical properties of fluids –, an appropriate correlation is needed for convective heat transfer coefficient (α) calculation. When one does not have a criterial equation for the corresponding plate shape, we propose a selecting method for α. With the suggested relationships from literature, we calculate the plate number of a geometrically known, similar heat duty PHE and choose those relationships that give the same plate number with the known heat exchanger. In our case study, the plate number determined by any of the screened equations for whole milk preheating has almost the same value (n = 10 ± 1) regardless of the method used to solve the PHE model (plate efficiency and Nconverg or Kconverg convergence methods). For liquids’ thermophysical property estimation, we recommend averaging the values given by equations from literature, followed by equation fitting.

Some aspects of plate number estimation of plate heat exchangers (PHEs). A case study

Sapientia Hungarian University of Transylvania

Cluj-Napoca, Faculty of Economics, Socio-Human Sciences and Engineering, Department of Food Science

Acta Universitatis Sapientiae, Alimentaria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

For the proper estimation of the plate number (N) of a plate heat exchanger (PHE) – in addition to the flow rates and thermophysical properties of fluids –, an...

Some aspects of plate number estimation of plate heat exchangers (PHEs). A case study

Publié en ligne: 17 déc. 2021

Pages: 130 - 156

DOI: https://doi.org/10.2478/ausal-2021-0008

Mots clés
milk, thermophysical properties, plate heat exchangers, plate number estimation

© 2021 A. Szép et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Some aspects of plate number estimation of plate heat exchangers (PHEs). A case study

Publié en ligne: 17 déc. 2021

Pages: 130 - 156

DOI: https://doi.org/10.2478/ausal-2021-0008

Mots clésmilk, thermophysical properties, plate heat exchangers, plate number estimation

© 2021 A. Szép et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Mots clés
milk, thermophysical properties, plate heat exchangers, plate number estimation