Malzeme özelliklerinin ve yalıtım sisteminin isi köprüsü davranışına etkisinin incelenmesi

Year 2017, Volume: 23 Issue: 6, 687 - 693, 15.12.2017

Güler Gaygusuzoğlu , Adem Bakış

Abstract

Enerji
tüketiminin azaltılması ülkelerin gelişimi için çok önemlidir. Yapılarda enerji
tüketimi bu nedenle büyük önem arz etmektedir. Binalarda ısı kaybını azaltmak
için ısı köprülerini, ısı köprülerini oluşturan yalıtım sisteminin etkilerini
ve kullanılan malzemenin davranışlarını çok iyi bilmek gerekmektedir. Bu
çalışma, teras katlarda
beton, duvar ve yalıtım malzemelerinin ısıl iletkenlik katsayılarının değişiminin
ısı köprüsüne etkilerini incelenmektedir. Bunun için literatürden farklı olarak Türkiye'de
betonarme binaların teras katları için en sık kullanılan 9 kesit üzerinde
inceleme gerçekleştirilmiştir. "Yalıtım sistemi, beton ve/veya duvar
malzemesinin değişiminin ısı köprüsüne etkisi ne olmaktadır?" sorusuna
yanıt aranmıştır. Hesaplamalar TS 825’te belirtilen birinci derece gün bölgesi
için sıvalı durum göz önünde bulundurularak yapılmış olup farklı yalıtım
çeşitlerinde duvar-döşeme-kiriş birleşimlerinin ısı akıları ve sıcaklıkları
hesaplanmıştır.  Hesaplamalarda gerçeğe
yakın değerler veren ve sonlu elemanlar metodunu kullanan, QuickField 5.6
programından yararlanılmıştır. Bu çalışmanın sonuçları ile ısı köprülerinde
beton, duvar ve yalıtım malzemelerinin ısıl iletkenlik değerlerinin değişiminin
iki boyutlu olarak nasıl değiştiği görülmektedir. En büyük ısı kaybı, betonun
ısıl iletkenlik katsayısının artması sonucunda elde edilmektedir. Ayrıca elde
edilen sonuçlarla teras katlarda kullanılan yalıtım çeşitlerinin hangisinin
daha verimli olduğu sorularına da yanıt verilmektedir.

Keywords

Isı köprüsü, Isıl iletkenlik, Isıl kayıp, Teras katlar

The effect of material properties and isolation system on thermal bridge behavior

Abstract

Reducing
the energy consumption is very important for the development of the countries.
For this reason, energy consumption at the buildings is very important. It is
necessary to know behaviours of thermal bridges, affects at insulation system utilized
and materials constituting the thermal bridges very well to cut down thermal
loss in buildings, this study searches affects at change in the thermal
conductivity coefficients of concrete, wall and insulation materials used in
the terrace floors on the thermal bridges . For this reason, apart from
literature, examination on 9 insulation sections most frequently used for the
terrace floors at reinforced concrete buildings in Turkey were realized. What
is the effect of changes at insulation system and/or the concrete and the wall
materials on the thermal bridge?”. Answers to this question was  researched. Calculations were made for
temperature and heat flux distributions at wall-floor-beam combinations at
different insulation states considering 
plastered state for first degree day area, as mentioned in TS825
Standard. For the calculations, QuickField 5.6 program, which gives realistic
values and utilizes finite elements method was used.  With the results of this study, it was  seen how the behavior of the variance of the
concrete, wall and insulation heat conductivity values at the thermal bridges
changes in a two-dimensional way. As a result of the calculations, the biggest
heat loss was obtained when thermal conductivity coefficient of the concrete increased.
Besides, answers are given to  questions
such as which is the most productive section 
used in terrace floors?

Keywords

Thermal bridges, Thermal conductivity, Thermal loss, Terrace floors

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