This thesis focuses on the optimisation of heat transfer in heat exchangers for battery cooling using computational fluid dynamics (CFD). In the introduction, fundamental physical laws such as te conservation of mass, momentum and energy are presented. The Navier-Stokes equations, which are the basis for simulations with computational fluid dynamics, are also discussed. The experimental part describes the procedure for preparing models for the simulations. The validation procedure of the computational mesh is described, which is crucial to ensure the accuracy and reliability of the results. The results of simulations for three different heat exchangers are presented and analysed. The heat exchanger with a wide canal and offset islands proved to be the best. We also investigated the impact of different flow rates on cooling efficiency, finding that the impact on efficiency improvement is smaller at higher flow rates.
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