Flow Loss Analysis and Structural Optimization of Multiway Valves for Integrated Thermal Management Systems in Electric Vehicles

The multiway valve is the core component of integrated thermal management system in an electric vehicle, and its heat transfer loss pressure significantly impact performance whole system. In this paper, valves are investigated using three-dimensional unsteady numerical simulations. Heat under different operating modes revealed, relationships between mass flow rate, inlet temperature, materials studied. results show that significant temperature gradient around control shaft mainly occurs junction shell, where direction changes sharply. nonlinearly positively correlated with rate. Furthermore, main geometric parameters pipeline optimized. firstly increases then decreases, increasing curvature inner walls pipe corners four channels. Compared structural optimization at corners, wall shell reduces continuously. Moreover, study obtains optimal structure minimum coupled corners.