Week 7 - Mid-term Project - Natural Convection

JORGE LOZANO

Electronic Cooling Simulations using ANSYS ICEPAK

Week 7 - Mid-term Project

Objective

• Verify the temperature rise for the low voltage control panel for the following configuration.
• Build the model as per the following information.
• Mesh the model with nonconformal meshing
• Panel dimensions: height 2000mm, width 1600 mm depth: 700mm.
• Actual current incoming: 1200A. Circuit breaker losses are given as per the following table. The current distribution and bus bar dimensions / Cable dimensions and lengths are given as per the following table.
• Assume the circuit breaker dimensions and panel inside dimensions.
• The thermal designer can assume the placements of the circuit breakers
• The ambient temperature is 25 C

The following image representation shows the general real assembly of breaks and an electrical connection.

The following parameters and considerations in dimensioning and power W, will be applied to generate a thermal simulation.

Geometry

The process will be introduced from a new project document by opening the Icepak software, and starting to generate each block representing the system, fluid or solid, according to its coordinates and its properties given earlier, as seen in the image having an open system, having side boundary layers as ambient conditions

Pre-processing

As seen in the videos the mesh conforming conditions will begin by creating an assembly normal mesh and particular mesh sizing refinements in all solid elements, considering the skewness as quality value to consider.

Residual

Once the simulation is completed at the specified iteration number:

Post-processing

The contour, plane cut and vectors postprocessing are generated, seeing the natural convection effect from having heated breaks generating power, a forced simulation was performed varying the inlet position which was where it could cool down the system a faster and in a better performance.