Determination of optimum thickness of nano and traditional insulation materials for building external walls by using degree-day approach for different climatic regions in Egypt

Ali, Asmaa Mohammed; Farouk, AKRAM; Ezzeldin, Mohamed

doi:10.21608/msaeng.2022.273838

Determination of optimum thickness of nano and traditional insulation materials for building external walls by using degree-day approach for different climatic regions in Egypt

Document Type : Original Article

Authors

¹ Ain Shams University (ASU), Engineering Faculty, Architecture department, Abbasseya, 11566, Cairo, Egypt

² Engineering Faculty, Ain Shams University (ASU), Architecture department, Cairo, Egypt

³ Engineering Faculty, Ain Shams University (ASU), Architecture department,Cairo, Egypt

10.21608/msaeng.2022.273838

Abstract

The usage of energy is one of the most critical challenges in modern life.
The majority of the energy we use comes from fossil fuels which cause significant
environmental degradation. One of the most effective ways of reducing energy use
is using thermal insulation in building exterior walls but at a higher cost.
Accordingly, this study discusses selecting the optimal thermal insulation and its
thickness to increase building efficiency. The optimum insulation thickness is the
thickness of insulating material that saves the most energy while costing the least.
In this study, optimum insulation thicknesses of four cities from different regions
of Egypt have been calculated for external walls using electricity as energy source.
The calculations are made on 5 different traditional insulation materials and 2 nano
insulation materials. Different cases have been considered: buildings cooled only,
and both heated and cooled. It was found that Glass wool (GW) is the optimal
insulation in all given locations, but its optimal thickness is very large and that will
reduce the available used spaces which will reduce the rental income of buildings
and reduce life cycle cost saving of building. Wherefore this study discusses also
selecting the optimal thermal insulation and its thickness in the case of accounting
for the impacts of space savings in life cycle saving of building, The results show
that the nano insulation material vacuum insulated panels can be considered the
optimum insulation in all cases when considering area saving as it achieved the
maximum life cycle saving. Finally, the study reviewed the placing locations and
installing insulation materials in buildings.

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