1. Mladen Tomić, The School of Higher Technical Professional Education, Niš, Serbia
2. Biljana Milutinović, College of Applied Technical Sciences Niš, Serbia
3. Predrag Živković, Faculty of Mechanical Engineering Niš , Serbia
4. Petar Djekic, The School of Higher Technical Professional Education, Serbia
5. Mirjana Laković, University of Nis, Faculty of Mechanicla Engineering, Serbia
The need for compact heat exchangers has led to the development of many types of surfaces that enhance the rate of heat transfer, among them perforated plate heat exchangers. Perforated plate heat exchangers consist of a series of perforated plates, separated by a series of spacers. In the present study, numerical simulations were performed to determine the overall heat transfer coefficient of a perforated plate with square arranged cylindrical perforations. Three parameters were varied in the study: plate porosity (in the range of 10 to 50%), hole-based Reynolds number (in the range of 100 to 10000 Re), and the working fluid (one-, two-, and three atomic gasses). The resulting Nusselt number was correlated as the function of per-hole Reynolds number, Prandtl number, and geometric parameters. At the end of the paper, the Nusselt number prediction was compared with different authors correlations. The data agreed on qualitatively with the results obtained using a CFD. Using these data, a Nusselt criterial equation was obtained.
Energetics and Thermal Engineering