Investigation of The Effect of Optimum Insulation Thickness of Building Exterior Walls on Energy Consumption and Reduction of Emissions

Öz

The heating and cooling load of buildings gets reduced by preventing heat transfer to the external environment using exterior wall insulation. In addition to the saving achieved by reducing fuel consumption, the amount of harmful gases emitted into the atmosphere also gets reduced and a positive contribution is made to the environment. It is a known fact that 85% of CO2 emission in Turkey is caused by the energy sector in Turkey. In this study, the optimum insulation thickness of exterior walls and emission per unit area was calculated for 81 provinces in Turkey. The Life Cycle Cost method was used as the approach. As a result, it was determined that while the optimum insulation thickness varied between 0.024m (İçel) and 0.149m (Ardahan), a 75%-80% reduction can be achieved in emissions. Additionally, energy savings and payback periods based on optimum insulation thickness in heating and cooling for provinces selected from five different climatic zones (Antalya, Istanbul, Ankara, Kayseri, and Erzurum) were calculated and compared. In the selected provinces, the highest energy savings and the shortest payback period were obtained for Erzurum as 46.93$/m2 and 1.33 years.

Anahtar Kelimeler

• Degree Days
• Energy Saving
• Optimum Insulation Thickness
• Greenhouse Gas Emission
• External Walls

Kaynakça

1. Kurekci, N.A., (2016). Determination of optimum insulation thickness for building walls byusing heating and cooling degree-day values of all Turkey’s provincial centers. Energy and Buildings, 118:197-213.
2. Acıkkalp, E. and Yerel Kandemir, S., (2019). A method for determining optimum insulation thickness: combined economic and environmental method. Thermal Science and Engineering Progress, 11:249-253.
3. Alsayed, M.F. and Tayeh, R.A., (2019). Life cycle cost analysis for determining optimal ınsulation thickness in palestinian buildings. Journal of Building Engineering, 22:101-112.
4. Şencan Şahin, A., Kovacı, T., and Dikmen, E., (2020). Determination and economic analysis of the optimum ınsulation thickness of building walls, taking into account the annual CO2 emission. Pamukkale Univ Engineering Science Journal, In Print: PAJES-03083 DOI: 10.5505/pajes.2020.
5. Karakaya, H., (2018). Determination of optimum ınsulation thickness in different walland fuel types in heating and cooling and environmental effects. Fırat Üniv. Engineering Science Journal, 30(2):193-202.
6. Ozel, M., (2013). Thermal, economical and environmental analysis of ınsulated building walls in a cold climate. Energy Conversion and Management, 76:674-684.
7. Küçüktopcu, E. and Cemek, B., (2018). A study on environmental impact of insulation thickness of poultry building walls. Energy, 150:583-590.
8. Nyers, J., Kajtarb, L., Tomic, S., and Nyers, A., (2015). Investment-savings method for energy-economic optimization ofexternal wall thermal insulation thickness. Energy and Buildings, 86:268-274.

9. Rakshit, D. and Muddu, D.M., (2021). Gowda, anthony james robinson, aimee byrne, optimisation of retrofit wall insulation: an ırish case study. Energy and Buildings, 235:110720.
10. Yuan, J., Farnham, C., and Emura, K., (2017). Optimal combination of thermal resistance of ınsulation materials and primary fuel sources for six climate zones of japan, Energy and Buildings, 153:403-411.
11. Xiangwei, L., Youming, Hua, G., Fazio, P., Guojie, C., and Xingguo, G., (2015). Guoda, determination of optimum ınsulation thickness for building walls with moisture transfer in hot summer and cold winter zone of china. Energy and Buildings, 109:361-368.
12. Sabapathy, K.A. and Gedupudi, S., (2020). On the influence of concrete-straw-plaster envelope thermal mass on the cooling and heating loads for different climatic zones of India. Journal of Cleaner Production, 276:123-117.
13. Hasan, A., (1999). Optimizing insulation thickness for buildings using life cycle cost. Applied Energy. 63(2):115-124.
14. Kanakli, O., (2008). A Study on residential heating energy requirement and optimum insulation thickness. Renewable Energy, 33:1164-1172.
15. Ucar, A. and Balo, F., (2010). Determination of the energy savings and the optimum ınsulation thickness in the four different insulated exterior walls. Renewable Energy, 35:88-94.
16. http://www.canakkalegaz.com.tr/turkish/2019. Date of Access: 06.11.2020.
17. www.dosider.org, Fuel prices, 2020. Date of Access: 06.11.2020.
18. http://www.izocam.com.tr, Insulation Unit Prices, 2020. Date of Access: 06.11.2020.
19. The Central Bank of the Republic of Turkey (TCMB), (2020), http://www.tcmb.gov.tr/. Date of Access: 06.11.2020.
20. Turkish Statistical Institute (TUIK), (2020), http://www.tuik.gov.tr/.Date of Access: 06.11.2020.