ABSTRACT

This research aims to estimate the operational energy (OE) savings of a full-scale building, made of lime hemp concrete (LHC) with alternative binders partly replacing lime, compared to buildings made of conventional materials, e.g. Autoclaved Aerated Concrete (AAC), Hollow Concrete Blocks (HCB), and Expanded Polystyrene (ESP). The thermal performance of small size (1 m × 1 m) different materials test cells was experimentally studied. Experimental results were compared to simulated values obtained by EnergyPlus. Monitored and simulated indoor temperatures were found to be in good agreement. Subsequently, the thermal performance and energy consumption of full-scale buildings (10 m × 10 m × 2.9 m) were simulated by EnergyPlus with a great degree of confidence. In up-scaled building simulations, LHC presented the best thermal performance and consequently the lowest energy consumption, reaching ∼7 kWh/m²/year, nearly Zero Energy Building standards, 90% lower as compared to HCB which obtained the highest energy consumption. Dynamic external window shading was shown to have a significant impact on cooling energy savings. This research clearly shows the high potential of using LHC with alternative binders as a partial replacement for lime, as it has advantages in terms of energy savings, and their equivalent CO₂ emissions.

摘要

本研究旨在估算由石灰麻混凝土 (LHC) 和部分替代石灰的替代粘合剂制成的全尺寸建筑的运营能源 (OE) 节约，与由传统材料制成的建筑相比，例如蒸压加气混凝土 (AAC)，空心混凝土砌块 (HCB) 和发泡聚苯乙烯 (ESP)。实验研究了小尺寸 (1 m × 1 m) 不同材料测试电池的热性能。实验结果与 EnergyPlus 获得的模拟值进行了比较。发现监测和模拟的室内温度非常一致。随后，EnergyPlus 满怀信心地模拟了全尺寸建筑（10 m × 10 m × 2.9 m）的热性能和能耗。在大规模的建筑模拟中，² /年，接近零能耗建筑标准，比获得最高能耗的HCB低90%。动态外窗遮阳显示出对冷却节能的显着影响。这项研究清楚地表明，使用带有替代粘合剂的 LHC 作为石灰的部分替代品具有巨大的潜力，因为它在节能方面具有优势，并且具有等效的 CO ₂排放量。