Thermal manager of anti-freezing building in HVDC substation

This paper discusses the thermal management of the structure design of an anti-freezing building in an HVDC substation. The CFD simulation has been carried out under the condition of natural wind velocity with the influence of the air cooler. The result shows that the hot air reflux ratio is proportional to natural wind velocity when the anti-freezing building has a certain height; the hot air reflux ratio is proportional to the anti-freezing building height when the natural wind is in a certain velocity. Through detailed cost analysis, the most optimal height of anti-freezing building is about 6 meter. Based on the thermal analysis, rational design of anti-freezing building can effectively prevent hot air recirculation, and the air cooler inlet temperature decreases 3°C.