The usage of air gap in the composite wall for energy saving and air pollution

Abstract

In this study, the effects of air gap on the optimum insulation thickness, insulation, and total costs, energy saving, payback period, fuel consumption, and emissions of CO 2 and SO 2 in the composite wall construction have been investigated for a prototype building in a sample city, Karabuk. For this reason two wall constructions, one with and the other without air gap, have been considered and the air gap thickness has been taken from 0 to 6 cm. Based on LCC analysis, optimum insulation thickness is determined for different air gap thicknesses. The results show that when 2, 4, and 6 cm of the air gap thicknesses were used; the optimum insulation thickness, insulation cost, and payback period were decreased by 10.02, 20.03, and 30.07% while the total cost, fuel consumption, and CO 2 and SO 2 emissions were decreased by 27.5, 44.98, and 54.46%, respectively. The insulation material installed at its optimum insulation thickness with air gaps in the composite wall will not only reduce the heat loss from the building walls but also has economical and environmental advantages.

Energy Costs of Energy Savings in Buildings: A Review

“…Especially, there are numerous studies done in Turkey ( [63][64][65][66], among many). This is fortunate since this dataset is essentially internally consistent, which helps to point the underlying factor affecting the EROI.…”

“…It should be pointed out that air in a cavity is itself is a good insulator [66][67][68][69]. The EROI of an air insulating layer is infinite (as Q i = ∞ since it costs nothing (ε = 0)).…”

“…However, in practice, the situation is more complex. For example, in the previous papers [66][67][68][69], an air cavity is left within a wall. In these cases, there is no additional cost associated to the air confinement.…”

Sensitivity Analysis of Optimum Insulation Thickness for Pipe Diameters in Pipe Insulation with Air Gap for City Pipelines

“…Taking air gaps of 2 cm, 4 cm, and 6 cm they reported that when optimum thickness of different insulation materials are determined, energy consumption, and emissions reduced by 65%–77% compared to walls without air gap. Kurt used the LCC analysis method for Karabük/Turkey and researched the effects on air gap of optimum insulation thickness, energy savings, total costs, and CO 2 and SO 2 emissions in composite external walls. When air gaps of 2 cm, 4 cm, and 6 cm are left, there were 30% savings ensured in total costs compared to walls without air gaps.…”

Bi̇na Diş Duvarlarinda Farkli Yalitim Malzemesi̇ Ve Hava Boşluğu Kulaniminin, Bi̇ri̇m Alandaki̇ Enerji̇ Tasarrufu Ve Ki̇şi̇ Başi Emi̇syon Hesaplamalarinda Yeni̇ Bi̇r Yaklaşim

“…Gürel ve Daşdemir, Türkiye'nin dört farklı ısı bölgesinden iller için dış duvar yalıtımının optimum kalınlıkta yapılması durumunda, salınan zararlı gazların % 65-75 oranında azaldığını tespit etmiştir [15]. Kurt, Karabük ilinde, yalıtımlı duvar da hava boşluğunun sırasıyla 2, 4, 6 cm bırakılması durumunda, yalıtımlı hava boşluksuz duvara oranla, CO 2 ve SO 2 salınımında ortalama %54,46'ya varan azalma olabileceğini göstermiştir [16]. Mıhliyanlar vd., 2 ve 5 katlı iki farklı binada, TS 825 (2008) "Binalarda Isı Yalıtım Kurallarına göre binalarda yalıtım düzeyinin iyileştirilmesi ile BGE azalmanın değişimi ve buna bağlı olarak hava kirliliğindeki iyileşmeyi değerlendirmişlerdir [17].…”