The investigation economics of optimum insulation thickness on different orientation in buildings.

ABSTRACT THE INVESTIGATION ECONOMICS OF OPTIMUM INSULATION THICKNESS ON DIFFERENT ORIENTATIONS IN BUILDINGS Cem BAYKAL Department of Mechanical Engineering MSc. Thesis Adviser: Assoc. Prof. Dr. Derya Burcu ÖZKAN In this day and time, energy need and reach the energy resources issue plays an important role in the political and economic sense in the world. The necessity of the various arrangements emerged for the use of energy in consequences of increasing the energy demand and energy consumption, high percentage of dependency on foreign sources and environmental factors caused by energy consumption in our country. Considering the winter period, given a large part of the energy consumed in buildings used for heating purposes in our country. There are some significant point that buildings energy consumption can be dramatically reduced such as insulation with optimum insulation thickness and appropriate insulation material of building elements, improvement of glazing and joinery and with using of efficient heating systems. In our country, in order to provide solutions that minimize energy consumption, "TS 825 Thermal Insulation Rules in Buildings" was put in to effect in 2000. Thermal insulation in buildings is a factor that increases the initial investment cost although the saving in energy consumption and operation cost it's provide the recycling in a short term period. Thus, choose the right materials for the thermal insulation and the determination of the optimum insulation thickness is an important issue. In this study, optimum insulation thickness is determined for different external wall orientation based on the P1-P2 economic analysis method in a building located in İstanbul, Beykoz. In four aspects of the building, interior and exterior surface temperatures for the outer wall and the ambient and indoor temperatures has been measured by means of the data logger throughout the year. Annual inner surface and outer surface temperature of external wall and ambient-indoor temperature which measured throughout the year is shown as graphics. According to the TS 825 standard, a suitable model was developed using the measured inner surface and outer surface temperature of external wall. Then in developed model, optimum insulation thickness for different wall orientation, energy savings and pay back periods was calculated. As a result, optimum insulation thickness for the orientation of north, south, west, east and situation of independent from orientation were found 6,47 cm, 3 cm, 6,92 cm, 7 cm and 5,25 cm, respectively. Energy savings and pay back periods are also being calculated as 89,38 TL/m² and 1,64 year, 74,05 TL/m² and 2,02 year, 73,91 TL/m² and 2,04 year, 68,32 TL/m² and 2,14 year in north, west, east and situation of independent from orientation, respectively. Keywords: Optimum insulation thickness for building external wall, energy saving, payback period.