Energy Saving Potential Analysis and Regulation Threshold Optimization of External Shading for Large Railway Passenger Station Buildings
The transparent enclosure structure with large window-wall ratio and large skylight ratio is one of the important reasons for high cooling load and high energy consumption of environmental control in large railway stations.The setting of external shading is an effective means to alleviate this phenomenon,but its application still needs to reasonably balance the impact on natural lighting.This paper takes a large railway passenger station building as the object,establishes a numerical analysis model for its photothermal environment and verifies it.On this basis,by taking the comprehensive energy consumption of air-conditioning lighting as an indicator and selecting the external shading of roller shutter as a representative,this paper analyzes the comprehensive energy saving potential of building external shading applied to railway passenger stations in different climate zones,and determines the thermal climate zones suitable for external shading application.On the premise of ensuring indoor photothermal environment level,this paper analyzes the change of comprehensive energy consumption of air-conditioning lighting with the external shading regulation threshold(based on the projection intensity of solar radiation),and summarizes the optimal regulation threshold in different climate zones.The study results improve the passive technical system of transportation infrastructure and provide a theoretical basis for the design and regulation of external shading technology in large railway station buildings.
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