植物活墙对办公建筑室内CO_(2)净化及节能效果  

Effects of Living Walls in the Removal of Indoor CO_(2)and Energy Conservation in Office Buildings

作　　者：张丹妮 张磊[1] 张玉[1] ZHANG Danni;ZHANG Lei;ZHANG Yu(South China University of Technology,Guangzhou 510640,Guangdong,China)

机构地区：[1]华南理工大学,广东广州510640

出　　处：《建筑科学》2024年第2期100-110,共11页Building Science

基　　金：国家自然科学基金面上项目“夏热冬暖地区垂直绿化光热传递模型及其与建筑热过程耦合机制研究”(52178075)。

摘　　要：CO_(2)既是室内环境通风指标也是1种直接的污染物。为了探究植物活墙对办公建筑室内CO_(2)净化及节能效果,先采用对比实验房探究办公空间中可调节因素植物固碳生化途径、光照强度和生长基质干湿程度对植物活墙CO_(2)净化速率的影响,再数学分析植物活墙对广州地区单人办公空间新风负荷的影响。研究发现,植物固碳途径和基质干湿程度对植物活墙CO_(2)净化速率影响不显著,但基质水分缺乏会造成植物活墙净光合效率降低。黑暗条件下CAM植物具有一定的碳同化能力,但无法平衡土壤微生物的呼吸量。对于广州地区单人办公空间,每增加1 m2绿萝活墙,高光照下,夏季新风冷负荷和冬季新风热负荷分别降低18.67 W和8.77 W;中等光照下,夏季新风冷负荷和冬季新风热负荷分别降低6.70 W和3.15 W,单位面积绿萝活墙可实现建筑节能率3.6%~7.7%。预计高光照下13.0 m2绿萝活墙可以替代单人办公空间新风系统的CO_(2)净化效果。CO_(2)is not only an indicator of indoor ventilation,but also a direct pollutant.To explore the effects of living walls in the removal of indoor CO_(2)and energy conservation in office buildings,this paper first conducted experiments to study the influence of plants’photosynthetic pathways,light intensity,and substrate moisture content,which can be adjusted in single office space,on CO_(2)removal rate of livings walls in comparison experiment rooms.Then,it analyzed mathematically the effects of living walls on fresh air load in a single-person office in Guangzhou.The results show that the plant’s carbon assimilation pathways and substrate moisture content had no significant effects on the CO_(2)removal rate of living walls.However,the lack of water in the substrate would reduce the net photosynthetic efficiency of living walls.CAM plants can assimilate carbon dioxide to a certain extent under dark conditions,while hardly balancing the respiration of soil microorganisms.In single office spaces in Guangzhou,with the increase of 1 m2 of Epipremnum aureum living wall,the fresh air cooling load in summer and heat load of air conditioning in winter fall by 18.67 W and 8.77 W respectively under high light intensity.Under moderate light intensity,the fresh air cooling load in summer and air conditioning heat load in winter are reduced by 6.70 W and 3.15 W respectively.The E.aureum living wall per unit area can achieve a building energy saving rate of 3.6%~7.7%.Under high light intensity,13.0 m2 of E.aureum living walls are expected to replace the CO_(2)removal effect of a fresh air system in a single office space.

关 键 词：植物活墙 办公建筑 二氧化碳浓度 室内空气质量 建筑节能 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]