不同气候区新风地道预处理节能潜力分析

Analysis on Energy Saving Potential of Underground Tunnel in Different Climate Zones

针对现有地道风计算模型的不足,提出了适合工程应用的地道风动态热湿变化计算模型。分析了气流与地道的热湿传递特性,以此为基础建立了相应的数学模型,通过引入轴向单元分割思路,提出了准二维的模型离散方法。以某别墅为研究对象,对不同气候区的地道风节能潜力进行了计算及分析,结果表明,对于不同气候区,地道风技术具有较好的节能效果,新风负荷的平均节能率达到了30%。

In view of the shortage of the existing calculation model of underground tunnel-ventilation,a calculation method based on numerical calculation is proposed in this paper,which is suitable for actual project application.Based on the characteristic of heat and mass transfer between air stream and underground tunnel,the mathematic models is established.The equations are discretized based on cell division strategy.Taking an villa as studying case,the energy saving potential of underground tunnel in different climate zone is calculated and analyzed,which shows great energy saving performance.For different climate zones,the energy consumption of outdoor-air system can reduce 30%by using underground tunnel.