FARKLI İKLİM ŞARTLARI İÇİN HAVA BOŞLUKLU OPTİMUM BORU YALITIM KALINLIĞININ BELİRLENMESİNDE YAŞAM DÖNGÜSÜ MALİYET ANALİZİ

Year 2018, , 89 - 101, 27.06.2018

Yusuf Başoğul

https://doi.org/10.22531/muglajsci.422979

Abstract

Bu çalışma mekanik
tesisatta 50 mm ile 1000 mm arasındaki borularda hava boşluğu, yalıtım
malzemesi ve her ikisinin kullanıldığı durumlardaki optimum yalıtım kalınlığı,
enerji tasarrufu ve geri dönüş süresinin belirlenmesi ile ilgilidir. Bu
hesaplama için ısıtma derece günler içerikli yaşam döngüsü maliyet analizi
kullanılmıştır. Durum çalışması olarak Afyon ili iklim şartları kullanılmasına
rağmen çalışma soğuk, ılıman ve sıcak iklim şartları için de genişletilmiştir.
Böylece yalıtım kalınlığı, hava boşluğu, boru çapı ve ısıtma derece gün
değerlerine göre karşılaştırmalı değerlendirmeler yapılmıştır. Hava boşluğunun
kullanıldığı 50 mm ve 1000 mm’lik borularda optimum yalıtım kalınlığı
sırasıyla  %81 ve %39 düşmüştür. Ilık
iklimlerde hava boşluğunun ve soğuk iklimlerde ise yalıtımın kullanılması
tavsiye edilir. Hava boşluklu yalıtım uygulandığında optimum yalıtım
kalınlığını düşürmekle birlikte büyük çaplı borularda enerji maliyet tasarrufu
artarken küçük çaplı borularda geri dönüş süresi düşmektedir.

Keywords

Boru yalıtımı, Hava boşluğu, Yaşam döngüsü maliyet analizi, Optimum yalıtım kalınlığı

LIFE CYCLE COST ANALYSIS IN DETERMINING OPTIMUM PIPE INSULATION THICKNESS WITH AIR GAP FOR DIFFERENT CLIMATE CONDITIONS

Abstract

This study is about determining air gap,
insulation material in pipes between 50 mm and 1000 mm in mechanical
installation, and determining optimum insulation thickness, energy saving and
payback period in cases where both are being used. For this calculation, life
cycle cost analysis containing heating degree day has been used. Even though
Afyon province climate conditions have been used as the case study, the study
has been expanded for cold, temperate and warm climate conditions. This made it
possible to make comparative assessments for insulation thickness, air gap,
pipe diameter and heating degree day values. In 50 mm and 1000 mm pipes using
air gap, the optimum insulation thickness was reduced by 81% and 39%
respectively. It is recommended to use air gap in mild climates and to use insulation
in cold climates. When insulation with air gap is applied, optimum insulation
thickness is reduced, and in pipes with greater diameter energy cost saving is
increased while in pipes with smaller diameter the payback period is reduced.

Keywords

Pipe insulation, Air gap, Life cycle cost analysis, Optimum insulation thickness

References

• Kecebas, A., Alkan, M.A. and Bayhan, M., “Thermo-economic analysis of pipe insulation for district heating piping systems”, Applied Thermal Engineering, Vol. 31, 3929–3937, 2011.
• Mohsen, M.S. and Akash, B.A., “Some prospects of energy saving in buildings”, Energy Conversion and Management, Vol. 42, 1307–1315, 2001.
• Suman, B.M. and Srivastava, R.K., “Effect of air gap on thermal performance of composite wall section,” Indian Journal of Science and Technology, Vol. 1, 1–4, 2008.
• Mahlia, T.M.I. and Iqbal, A., “Cost benefits analysis and emission reductions of optimum thickness and air gaps for selected insulation materials for building walls in Maldives”, Energy, Vol. 35, 2242–2250, 2010.
• Kurt, H., “The usage of airgap in the composite wall for energy saving and air pollution”, Environmental Progress & Sustainable Energy, Vol. 30, 450–458, 2011.
• Dasdemir, A., “Economical and environmental analysis of the usage of air gap in the composite wall”, Electronic Journal of Machine Technologies, Vol. 8, 49–61, 2011.
• Ridouane EH, Bianchi MVA. Thermal performance of uninsulated and partially filled wall cavities. ASHRAE Annual Conference Montreal, Quebec, June 25–29, 2011.
• Mahlia, T.M.I., Ng, H.M., Olofsson, T. and Andriyana, A., “Energy and cost savings of optimal thickness for selected insulation materials and air gaps for building walls in tropical climate”, Energy Education Science and Technology Part A: Energy Science and Research, Vol. 29, 597–610, 2012.
• Cai, S. and Cremaschi, L. “An experimentally validated model to predict the thermal conductivity of closed-cell pipe insulation systems with moisture”, ASHRAE Conference Paper No: NY-14-C090, ASHRAE Winter Conference, New York, 2014.
• Faris, S.S., Chaichan, M.T., Sachit, M.F. and Jaleel, J.M., “Simulation and numerical investigation of the effect of air gap thickness on trombe wall system”, International Journal of Application or Innovation in Engineering & Management, Vol. 3, 159-168, 2014.
• Erturk, M., “A new approach to calculate the energy saving per unit area and emission per person in exterior wall of building using different insulation materials and air gap”, Journal of the Faculty of Engineering and Architecture of Gazi University, Vol. 31, 395–406, 2016.
• Kayfeci, M., “Determination of energy saving and optimum insulation thicknesses of the heating piping systems for different insulation materials”, Energy and Buildings, Vol. 69, 278–284, 2014.
• Basogul, Y. and Kecebas. A. “Economic and environmental impacts of insulation in district heating pipelines”, Energy, Vol. 36, 6156–6164, 2011.
• Kecebas, A., “Determination of optimum insulation thickness in pipe for exergetic life cycle assessment”, Energy Conversion and Management, Vol. 105, 826–35, 2015.
• Kecebas, A., “Determination of insulation thickness by means of exergy analysis in pipe insulation”, Energy Conversion and Management, Vol. 58, 76–83, 2012.
• Erturk, M., “Optimum insulation thicknesses of pipes with respect to different insulation materials, fuels and climate zones in Turkey”, Energy, Vol. 113, 991–1003, 2016.
• Holman, J.P., Heat transfer, 7th ed., McGraw-Hill Book Co., New York, USA, 1992.
• Ashrae, Handbook-Fundamentals, “Heat transfer”, Atlanta: ASHRAE, Chapter 22, p. 22.1–22.21, 1989.