Design Optimization of Perforated Plate Heat Exchangers using Genetic Algorithm
International Journal of Advanced Materials Manufacturing and Characterization
A B S T R A C T Perforated plate heat exchangers (PPHEs) come under the category of compact heat exchanger; offering high effectiveness, large surface area per unit volume (as high as 6000 m 2 /m 3 ) and better flow characteristics. PPHEs are constructed of alternately arranged perforated plates and spacers. Heat exchanging fluids flow through the holes of the plates and exchange heat by conduction through the plate material. Spacers help minimizing axial conduction and reheadering of fluids
... dering of fluids intermittently. Design of a compact heat exchanger is targeted for high effectiveness, low volume and minimum pressure drop. Performance of a PPHE depends on many design variables such as plate thickness, spacer thickness, pore diameter, porosity etc. For a given heat duty, these parameters can be optimized for maximizing effectiveness, minimizing volume and minimizing or limiting pressure drop.In this paper an attempt has been made for optimization of the design variables of a PPHE so that effectiveness of the heat exchanger per unit volume is maximized under the constraints of fluid pressure drop and length of the heat exchanger. Unlike the conventional approach, importance is given to the length of the heat exchanger which is limited to the available space inside the vacuum chamber of the diffusion bounding machine or the space available in a specific application. Using the given length of the heat exchanger and allowable pressure drop, the problem has been defined in unconstrained form and solved by Genetic algorithm.