关键词: building sustainability natural fibers resource sustainability rice husk waste roof insultation thermal insulation

来  源:   DOI:10.3390/ma17112589   PDF(Pubmed)

Abstract:
The development of bio-insultation materials has attracted increasing attention in building energy-saving fields. In tropical and hot-humid climates, building envelope insulation is important for an energy efficient and comfortable indoor environment. In this study, several experiments were carried out on a bio-insulation material, which was prepared by using rice husk as a raw material. Square rice husk-based insultation panels were developed, considering the ASTM C-177 dimensions, to perform thermal conductivity coefficient tests. The thermal conductivity coefficient obtained was 0.073 W/(m K), which is in the range of conventional thermal insulators. In a second phase of this study, two experimental enclosures (chambers) were constructed, one with rice husk-based insulation panels and the second one without this insulation. The measures of the temperatures and thermal flows through the chambers were obtained with an electronic module based on the ARDUINO platform. This module consisted of three DS18B20 temperature sensors and four Peltier plates. Daily temperature and heat flux data were collected for the two chambers during the dry season in Panama, specifically between April and May. In the experimental chamber that did not have rice husk panel insulation on the roof, a flow of up to 28.18 W/m2 was observed, while in the chamber that did have rice husk panels, the presence of a flow toward the interior was rarely observed. The rice husk-based insulation panels showed comparable performance with conventional insulators, as a sustainable solution that takes advantage of a local resource to improve thermal comfort and the reduction of the environmental impact.
摘要:
生物绝缘材料的发展在建筑节能领域引起了越来越多的关注。在热带和湿热的气候下,建筑围护结构保温对于节能和舒适的室内环境很重要。在这项研究中,在生物绝缘材料上进行了几次实验,以稻壳为原料制备而成。开发了基于方形稻壳的绝缘板,考虑到ASTMC-177尺寸,进行导热系数测试。得到的导热系数为0.073W/(m·K),这是在传统的热绝缘体的范围内。在这项研究的第二阶段,建造了两个实验外壳(腔室),一个是基于稻壳的隔热板,第二个没有这种隔热板。使用基于ARDUINO平台的电子模块获得通过腔室的温度和热流的测量。该模块由三个DS18B20温度传感器和四个Peltier板组成。在巴拿马旱季期间,收集了两个房间的每日温度和热通量数据,特别是在4月和5月之间。在屋顶上没有稻壳板隔热材料的实验室中,观察到高达28.18W/m2的流量,在有稻壳面板的房间里,很少观察到流向内部的流动。稻壳基绝缘板表现出与传统绝缘子相当的性能,作为一种可持续的解决方案,利用当地资源来改善热舒适度和减少对环境的影响。
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