Simulation and performance enhancement of the air cooling system in the valve halls of a DC/AC power converter station |
| |
Authors: | Richard J Lozowy Ahmed M El-Shaboury Hassan M Soliman Scott J Ormiston |
| |
Affiliation: | (1) Department of Mechanical and Manufacturing Engineering, University of Manitoba, Winnipeg, MB, Canada, R3T 5V6; |
| |
Abstract: | The present article reports on a ventilation system that uses impinging air jets to remove a portion of the heat generated
in DC/AC converter towers. Each tower is a vertical stack of electronic components used in the power conversion. Airflow from
the ventilation system enters the room through inlet ports located on the ground at two opposite sides of the DC/AC converter
towers. The existing ventilation system circulates sufficient airflow in terms of the total heating load; however, elevated
temperatures were reported within the towers due to poor air circulation. A numerical study has been conducted to investigate
steady three-dimensional (3-D) turbulent mixed (combined free and forced) convection air cooling of vertical stacks of heat-generating
blocks simulating typical towers in two valve halls of a DC/AC power converter station. The simulation results include the
magnitudes of the net airflows for all the inter-block gaps, the maximum temperature in each gap, and the flow structure represented
by streamlines at various locations of the 3-D domain. The location of the inlet, the inlet size and aspect ratio, and the
location on the tower at which the airflow was aimed were varied parametrically to improve the ventilation relative to the
existing design. These results demonstrate that, for fixed inlet mass flow rate, all the towers’ heat generating surfaces
can be kept under 60°C via simple modifications of the variables used in the parametric study. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|