Simplified Method for the Characterization of Rectangular Straw Bales (RSB) Thermal Conductivity

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Conti, Leonardo^1 ; Goli, Giacomo^1 ; Monti, Massimo^1 ; Pellegrini, Paolo^1 ; Rossi, Giuseppe^1 ; Barbari, Matteo^1

Department of Agricultural, Food and Forestry Systems, University of Florence, Via San Bonaventura, Florence

13 - 50145, Italy^1

关键词: Accurate measurement;    Constant temperature;    Design and implements;    External temperature;    Market development;    Scientific literature;    Sustainable building materials;    Thermal behaviours;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/5/052035/pdf
DOI  :  10.1088/1757-899X/245/5/052035

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

This research aims to design and implement tools and methods focused at the assessment of the thermal properties of full size Rectangular Straw Bales (RSB) of various nature and origin, because their thermal behaviour is one of the key topics in market development of sustainable building materials. As a first approach a method based on a Hot-Box in agreement with the ASTM C1363-11 standard was adopted. This method was found to be difficult for the accurate measurement of energy flows. Instead, a method based on a constant energy input was developed. With this approach the thermal conductivity of a Rectangular Straw-Bale (RSB λ) can be determined by knowing the thermal conductivity of the materials used to build the chamber and the internal and external temperature of the samples and of the chamber. A measurement a metering chamber was built and placed inside a climate chamber, maintained at constant temperature. A known quantity of energy was introduced inside the metering chamber. A series of thermopiles detects the temperature of the internal and external surfaces of the metering chamber and of the specimens allowing to calculate the thermal conductivity of RSB in its natural shape. Different cereal samples were tested. The values were found consistent with those published in scientific literature.