Energy-saving potential of 3D printed concrete building with integrated living wall
Energy-saving potential of 3D printed concrete building with integrated living wall
复制标题
DOI：
10.1016/j.enbuild.2020.110110
复制
发表时间：
2020-09
影响因子：
6.7
通讯作者：
Yawen He;Yamei Zhang;Chao Zhang;Hongyu Zhou
中科院分区：
文献类型：
--
作者：
Yawen He;Yamei Zhang;Chao Zhang;Hongyu Zhou
大规模混凝土3D打印和数字化建造为扩大建筑构件的设计空间带来了巨大的潜力（例如，建筑围护结构），用于集成包括节能在内的多种建筑功能。在这项研究中，开发了一种模块化3D打印垂直混凝土绿色墙系统-即3D-VtGW。3D-VtGW围护结构与预制（3D打印）多功能墙体模块化元件组装在一起，作为建筑物的外壳以及绿色墙体系统的骨干，以提高建筑物的能源效率。使用这种设计理念和大规模混凝土3D打印，在中国南京建造了一座原型商业建筑。为了量化3D-VtGW系统的节能潜力，开发了一个热网络模型来模拟具有3D-VtGW系统的建筑物的热行为和热舒适性分析。利用南京市标准天气资料（CSWD）进行了全建筑能耗模拟。模拟结果表明，采用3D-VtGW的建筑在节能和改善热舒适性方面具有显著的潜力。3D-VtGW中的综合绿化系统通过植物遮阳、蒸散和土壤储热的综合作用，大大降低了墙体外表面温度和穿透墙体的热通量。这项研究提出了数字化制造和建造带来的巨大机遇，以扩展建筑物的设计空间和功能集成。
Large-scale concrete 3D printing and digital construction has brought enormous potential to expand the design space of building components (e.g., building envelope) for the integration of multiple architectural functionalities including energy saving. In this research, a modular 3D printed vertical concrete green wall system – namely the 3D-VtGW, was developed. The 3D-VtGW envelope was assembled with prefabricated (3D printed) multifunctional wall modular elements, which serves as the enclosure of the building as well as the backbone for a green wall system to improve building’s energy efficiency. Using this design concept and large-scale concrete 3D printing, a prototype commercial building was built in Nanjing, China. To quantify the energy-saving potential of the 3D-VtGW system, a thermal network model was developed to simulate the thermal behavior of buildings with 3D-VtGW system and for thermal comfort analysis. Whole-building energy simulation was carried out using Chinese Standard Weather Data (CSWD) of Nanjing, China. The simulation results indicate that the building with 3D-VtGW exhibited prominent potential for energy saving and improved thermal comfort. The integrated greenery system in 3D-VtGW largely reduces wall exterior surface temperature and through-wall heat flux via the combined effects of plant shading, evapotranspiration, and heat storage from soil. This study presents the immense opportunities brought by digital fabrication and construction to extend the design space and function integration in buildings.