In the thesis, we examined the development of a pressure die-cast aluminum heat exchanger for coolant heating in electric vehicles. We reviewed existing solutions and performed baseline calculations for cooling fins with various parabolic profiles using a 1D numerical model and 3D CFD simulations. We analyzed the heat flux density using different fin shapes and evaluated how different fin layouts affect heat transfer efficiency. Based on the simulations, we produced a design for a pressure die-cast aluminum heat exchanger for EV coolant heating and assessed its configuration from a heat transfer standpoint. Of the 20 simulated heater models, two configurations met the main project requirements (maximum heater temperature <110 $^°$C and pressure drop <120 mbar). Using a custom performance metric that compares heat transfer relative to pressure drop, we selected the variant with inline cooling fins as the final version; it achieved a maximum temperature of 105 $^°$C and a pressure drop of 80,6 mbar.
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