Optimization of Hybrid Air-conditioning System with Natural Ventilation by Genetic Algorithm and Computational Fluid Dynamics

In order to clarify whether a combination of designs is optimal, design elements are divided intodesign variables and random variables in the inquiry process for the optimal design. Design variablesrelated to the model are selected by a genetic algorithm, and random variables related to outdoor condition are selected by the moment method. The whole process of optimization consisted of a two-step procedure to reduce the calculation loads for finding the optimal solution. This study carried out a simple analysis using a coarse mesh considering the calculation loads in the first step. In the second step, a detailed CFD analysis using a fine mesh was performed on the cases ranked at the top that were selected in the first step. It is expected that this study will be helpful in optimizing the design.