Components In Electrical Equipment Ventilation Numerical Simulation And Experimental Research

The article expects to get a method of research electronic heat transfer in cabinet in two ways. It validates the accuracy of the numerical ways in experimental ways and takes the electronic system of microwave oven as a model to do research into the key factors which work on the temperature changes of the key components in the system.The article includes five parts. The first one is to calculate the performances of the circle-plate fan and create the performance curves of the fan by the aid of a CFD software called Fluent, then to test the performance of the real fan in wind-box test-bed and to compare the numerical results and the testing results to validate the feasibility and the veracity of numerical results. The second one is to design an advanced-airfoil fan that have better performances than the circle-plate fan by the means of the advanced airfoil technology. The third part is to build the thermal model, create the mesh of the model and define the flow boundaries and thermal boundaries of the model with the help of CFD software Icepak, and then to get the flow field and temperature field in the electronic cabinet and calculate the temperature rise of key components in the cabinet with FVC method. The fourth is to test the temperature of the key components with thermocouples platinum resistances and patrol instruments, then to compare the numerical results and the testing results to validate the feasibility and the veracity of numerical results. At last, the article adjusts the wind flux and pressure of the fan and the distances between the fins to do research on the key factors which affect the temperature rise of the system, and it draws a conclusion is that both the rise of the flux and the pressure of the fan can limit the temperature rise of the system, but the pressure rise works better. When we fit the fin, we must consider both the flow flux and the flow velocity between the fins.