تأثير التكاليف المصاحبة لإضافة العازل الحراري إلى الجدران الخارجية للمباني على السمك الأمثل و فترة الاسترداد

Abstract EN

Thermal insulation of external walls is of great importance because of its direct effect on saving energy consumption in buildings.

This study examines the effect of the associated costs of thermal insulation on the optimal thickness of the insulation and the payback period.

These costs are: the cost of the additional wall, the cost of labor work, and the cost resulting from increasing the thickness of the wall beam.

The study is based on the climatic data of the city of Tripoli, and also on the specifications of the building materials used in the local region.

The thermal loads were calculated using the method of heating and cooling degree-days, and the economic analysis was based on the life cycle cost analysis.

The results showed that the optimum insulation thickness (6.0 cm), in the case of fixed beam thickness, was not affected by the associated costs, while the payback period increased from 2.14 years to 4.63 years.

In the case of variable beam thickness, the optimal insulation thickness ranged between 5.1 cm and 6.0 cm, and the payback period ranged between 2.14 years and 5.01 years that is when all associated costs were added.

Accordingly, the study showed the importance of taking the associated costs into consideration, which resulted in a decrease of up to 15% of the optimal insulation thickness and a rise of up to 134% in the payback period.