Thermal and Acoustic Properties of Aerogels: Preliminary Investigation of the Influence of Granule Size
Abstract
The influence of granules size in silica aerogels is experimentally investigated in terms of thermal and acoustic performance characteristics. The transmission loss (TL) is measured at normal incidence in a traditional impedance tube, whereas the thermal conductivity (?) is evaluated using a Hot Plate apparatus, setting up an appropriate methodology, due to the nature of the sample. The results reveal that the small granules (granules size in the 0.01-1.2 mm range), which have the highest density, have the best performance both in terms of thermal and acoustic properties. Depending on the granules size, ? varies in 19-22 mW/mK range at 10°C, whereas a TL equal to 13 dB at about 6400 Hz for 20 mm thickness is obtained for small granules. © 2017 The Authors.
Source
Energy ProcediaVolume
111Collections
Related items
Showing items related by title, author, creator and subject.
-
Effect of fly ash and silica fume on hardened properties of foam concrete
Gökçe H.S.; Hatungimana D.; Ramyar K. (Elsevier Ltd, 2019)In this study, the effects of foam content as well as fly ash and silica fume inclusion on some physical and mechanical properties of foam concrete, subjected to various curing regimes, were researched. Totally, forty-five ... -
Novel glazing technologies to mitigate energy consumption in low-carbon buildings: A comparative experimental investigation
Buildings play a key role in total world energy consumption as a consequence of poor thermal insulation characteristics of facade materials. Among the elements of a typical building envelope, windows are responsible for ... -
Toward multi-functional PV glazing technologies in low/zero carbon buildings: Heat insulation solar glass - Latest developments and future prospects
Cuce E. (Elsevier Ltd, 2016)Heat insulation solar glass (HISG) is a recently developed multi-functional photovoltaic (PV) glazing technology to mitigate energy consumption of buildings and to provide optimum thermal comfort conditions to occupants. ...