Turbulent Mixed-Convection Cooling of Stacked Heat-Generating Bodies in a Three-Dimensional Domain

Abstract

A numerical study has been conducted to investigate turbulent mixed-convection air cooling of vertical stacks of heat-generating blocks in a three-dimensional domain simulating a valve hall in a DC=AC converter station. The simulation results include detailed streamline plots of the flow structure, iso-volume plots of the temperature, the magnitude of the net flow in all tower gaps and the maximum temperature in each gap. A parametric study was conducted to explore the effects of geometry and inlet parameters on the cooling effectiveness. These results demonstrate that significant enhancements in the cooling effectiveness can be achieved by simple modifications of the angle of injection of the inlet air jet, the area of the inlet air jet, or the inlet air mass flow rate.

Simulation and performance enhancement of the air cooling system in the valve halls of a DC/AC power converter station

“…To the authors' best knowledge, there has been no research conducted that would be comparable to this, aside from previous work that has been done earlier at the University of Manitoba (Berg et al 2008a(Berg et al , 2008b). …”

Effective cooling of stacked heat-generating bodies in a large room: Comparison between floor and side-wall air injection

“…The air conditioning units for the room are also already in existence, therefore an ideal solution would be one in which the current inlet air flow rate was maintained. As a first attempt towards improving the cooling effectiveness over the current conditions in the existing valve hall, the present authors limited their work to floor injection and explored the effects of simple modifications of the angle of injection of the inlet air jet, the area of the inlet air grills, and the inlet mass flow rate [7]. Thus, the work in [7] corresponds to minimal structural changes in the existing valve hall.…”

“…As a first attempt towards improving the cooling effectiveness over the current conditions in the existing valve hall, the present authors limited their work to floor injection and explored the effects of simple modifications of the angle of injection of the inlet air jet, the area of the inlet air grills, and the inlet mass flow rate [7]. Thus, the work in [7] corresponds to minimal structural changes in the existing valve hall. In the present study, other methods for enhancing the cooling effectiveness involving substantial structural changes (e.g., side-wall injection) are considered.…”