Thermal Properties of Hemp Shives Used as Insulation Material in Construction Industry

Piotr Kosiński, Przemysław Brzyski, Maria Tunkiewicz, Zbigniew Suchorab, Damian Wiśniewski and Paweł Palczyński
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Piotr Kosiński: Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Jana Heweliusza 4, 10-724 Olsztyn, Poland
Przemysław Brzyski: Faculty of Civil Engineering and Architecture, Lublin University of Technology, 40 Nadbystrzycka Str., 20-618 Lublin, Poland
Maria Tunkiewicz: Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Jana Heweliusza 4, 10-724 Olsztyn, Poland
Zbigniew Suchorab: Faculty of Environmental Engineering, Lublin University of Technology, 40B Nadbystrzycka Str., 20-618 Lublin, Poland
Damian Wiśniewski: Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Jana Heweliusza 4, 10-724 Olsztyn, Poland
Paweł Palczyński: Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Jana Heweliusza 4, 10-724 Olsztyn, Poland

Energies, 2022, vol. 15, issue 7, 1-18

Abstract: The article presents the results of studies concerning raw hemp shives obtained from the Polish crop of industrial hemp as a loose-fill thermal insulation material. The study focuses mainly on the measurements of the pore size distribution, thermal conductivity and air permeability of material. An increase in the value of the thermal conductivity coefficient (0.049–0.052 W/(m·K)) was demonstrated with an increase in the bulk density. The porosity of the individual pieces of shives is 78.7% and the predominant number of pores is in the diameter range of 0.9–3 μm. The paper also presents an example of the use of the tested material as thermal insulation of the wooden frame wall. The heat flow analysis was performed in various wall variants (insulation thickness: 100, 200 and 300 mm and pressure difference 0, 5, 10 and 15 Pa). A clear influence of the variables on the temperature distribution was observed.

Keywords: hemp shives; porosity; thermal conductivity; air permeability; building partitions (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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