高架站房分层空调冬季热环境分析

Thermal Environment Analysis on Stratified Air Conditioning of Elevated Railway Station Building in Winter

以夏热冬冷地区某铁路旅客站房为研究对象,进行高架候车厅高大空间热环境调研测试,结果表明,冬季高大空间底部人员活动区与顶部空间的温度梯度为5.0℃,渗透风量则达到2.0次/h,热负荷指标增加25%;采用地板辐射供暖后可有效降低高大空间的温度梯度,同时实现29.9%的供暖节能率;均匀布置回风口、合理降低喷口送风温度、采用顶部射流送风技术及对渗透风进行预热等技术措施,均可显著改善分层空调系统的冬季送风效果。研究结论旨在为高大空间空调系统设计提供参考依据。

Focused on one elevated railway station in hot summer and cold winter zone,the thermal environment of elevated waiting hall is tested.Results show that,the temperature gradient between the bottom area and the top space is 5℃,the ventilation rate caused by infiltration air is 2.0 per hour,and the heat load is increased by 25%.Floor radiant heating system can effectively reduce the temperature gradient of large space,making the heating energy saving rate reach 29.9%.Uniform arrangement of the air return outlet,reasonable supply air temperature,top jet air supply technology and infiltration air preheating technology,have positive effect on air supply in winter.The research conclusions provide reference for the design of air conditioning system in large space.