Improvement of efficiency of a heat exchanger by twisted tubes - Ghazanfari, Valiyollah
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This book investigated the effect of twisted tubes on the thermal performance of the shell and tube heat exchanger. The computational fluid dynamics (CFD) with different turbulence models (realizable k- and standard k- ) was employed to analyze. The results were compared with the published study to verify the present solution. In this book, mass flow rates ranging from 0.5 kg/s to 2 kg/s were considered to investigate thermal performance. The results demonstrated changing the pitch from 180 mm to 135, 90, 67.5, and 45 mm increases the heat transfer coefficient to 7%, 13%, 25%, and 37%,…mehr

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Produktbeschreibung
This book investigated the effect of twisted tubes on the thermal performance of the shell and tube heat exchanger. The computational fluid dynamics (CFD) with different turbulence models (realizable k- and standard k- ) was employed to analyze. The results were compared with the published study to verify the present solution. In this book, mass flow rates ranging from 0.5 kg/s to 2 kg/s were considered to investigate thermal performance. The results demonstrated changing the pitch from 180 mm to 135, 90, 67.5, and 45 mm increases the heat transfer coefficient to 7%, 13%, 25%, and 37%, respectively. Comparing the smooth tube with other cases shows that using the twisted tube (P=45 mm) increases the pressure drop by 25% and enhances the heat transfer coefficient by 57%.
Autorenporträt
Valiyollah Ghazanfari est né en Iran. Il a obtenu une licence et une maîtrise avec mention très bien de l'Université d'Ispahan, en 2011 et 2013, respectivement. Il a obtenu son doctorat au NSTRI, à Téhéran, en 2020. Actuellement, il étudie la simulation des échangeurs de chaleur et a publié plusieurs articles dans des revues internationales.