綠能混合動力模組之奈米散熱實驗系統設計、控制與實際車載應用

This study has two main streams. The first is the design and control of the cooling system for hybrid green energy experiment platform. First, we establish the high mechatroncis nano-fluid-hybrid cooling experimental platform. The system is divided into two subsystems. One subsystem is the heating system, which control the heaters (double heat sources) by a programmable switching DC power supply. The second subsystem is the cooling control subsystem including a circular-pipe liquid-cooled radiators, an electric pump to determine the heat dissipation capacity and the coolant flow rate. A proportional valve manages Flow Split Ratio (FSR) to control dual power source at the optimal temperatures. Through the above steady-state results, we design the control unit. The second topic is using the multi-walled carbon nanotube to conduct transient / steady-state experiments at concentrations of 0.25, 0.5, 1.0 wt%, adding SDBS as the dispersant and the concentration compared to MWCNTs come to a 4: 5 fixed ratio. Next, we observe the changes properties of nano fluids such as: specific heat, thermal conductivity, viscosity, density at the temperatures of 20. C, 30. C, 40. C. The maximal heat transfer capacity of 40. C, can reach to 26.6% enhancement (compared to water. The hybrid cooling systems achieves maximal cooling effect, maintaining maximal efficiency of energy sources, effectively reducing the size of each cooling parts, reducing vehicle weight and increasing interior vehicle space to enhance vehicle performance.