Climate Change Impact on Multi-Objective Optimization: A Case Study on Educational Buildings

Akın, Şahin
Işeri, Orçun Koral
Akgül, Çağla
Erdoğan, Bilge
Gürsel Dino, Ipek
The changing weather conditions due to global climate change is expected to have a direct impact on buildings’ energy demand and occupant comfort. These conditions are estimated to become more challenging for educational facilities due to their high occupant density and the students’ sensitivity to heat. This study aims to present an approach for a comparative analysis for multi-objective optimization results that are projected under different climate change conditions. Two separate optimization processes were performed using NSGA-II for an existing educational building, with the goal of minimizing occupant discomfort and energy use. The differences between the resulting Pareto-sets were analyzed based on the hypervolume difference and statistical evaluations, including the T-test and the distribution of properties. The results of the two optimization processes showed that future weather conditions should be considered on the retrofit process as two Pareto-set have resulted differently in terms of decision variable values and the hypervolume calculation. The discomfort hours (Y1-Current) for optimization with current data resulted in lower values compared to the optimization with projected data (Y1-Projected), on the contrary, the total energy demand (Y2-Current) objective results have resulted in higher values than the projected data results (Y1-Projected).


Educational building retrofit under climate change and urban heat island effect
Akkose, Gizem; Akgül, Çağla; Gürsel Dino, İpek (2021-08-01)
Climate change (CC) and urban heat island (UHI) are important environmental forces that have serious consequences for the existing buildings, such as increased resource consumption and environmental footprint, adverse human health effects and reduced occupant comfort. In this context, educational buildings represent a critical category amongst other building typologies, due to their high energy use, high occupant density, atypical daily/annual occupancy patterns, and their occupants’ high vulnerability to h...
Comparison of BEST and LEED green building rating systems through cost based optimization
Uğurlu, Bengisu; Aksoy, Ayşegül; Department of Environmental Engineering (2020-1-25)
Buildings have significant effects on climate change due to vast resource consumption and pollution generation. Improving the effective use of limited resources and constructing environmentally friendly buildings are important in the realm of mitigations for climate change. Several countries have their green building rating systems tailored towards their regulations, distinctive climatic conditions, unique cultures and traditions, diverse building types and ages, or wide-ranging environmental, economic, and...
Carbon dioxide sequestration and enhanced oil recovery co-optimization
Akhundov, Nuri; Sınayuç, Çağlar; Department of Petroleum and Natural Gas Engineering (2021-9)
The worldwide growth of industry leads to continuous rise of anthropogenic emission amount into the atmosphere, which causes greenhouse effect all over the world, that is heating up the atmosphere and changing the global climate. On the other hand, carbon dioxide injection into oil reservoirs for the purpose of enhancement of oil recovery (CO2-EOR) has been commercially used for nearly 50 years. The operations in petroleum sector are being carried out in a way to maximize the recovered oil while keeping the...
Climate change effects on extreme flows of water supply area in Istanbul: utility of regional climate models and downscaling method
Kara, Fatih; Yücel, İsmail (2015-09-01)
This study investigates the climate change impact on the changes of mean and extreme flows under current and future climate conditions in the Omerli Basin of Istanbul, Turkey. The 15 regional climate model output from the EU-ENSEMBLES project and a downscaling method based on local implications from geophysical variables were used for the comparative analyses. Automated calibration algorithm is used to optimize the parameters of Hydrologiska Byrans Vattenbalansavdel-ning (HBV) model for the study catchment ...
Ecological impacts of global warming and water abstraction on lakes and reservoirs due to changes in water level and related changes in salinity
Jeppesen, Erik; Brucet, Sandra; Naselli-Flores, Luigi; Papastergiadou, Eva; Stefanidis, Kostas; Noges, Tiina; Noges, Peeter; Attayde, Jose Luiz; Zohary, Tamar; Coppens, Jan; Bucak, Tuba; Menezes, Rosemberg Fernandes; Sousa Freitas, Francisco Rafael; Kernan, Martin; Sondergaard, Martin; Beklioğlu, Meryem (2015-05-01)
According to the Intergovernmental Panel on Climate Change report released in September 2014, unprecedented changes in temperature and precipitation patterns have been recorded globally in recent decades and further change is predicted to occur in the near future, mainly as the result of human activity. In particular, projections show that the Mediterranean climate zone will be markedly affected with significant implications for lake water levels and salinity. This may be exacerbated by increased demands fo...
Citation Formats
Ş. Akın, O. K. Işeri, Ç. Akgül, B. Erdoğan, and I. Gürsel Dino, “Climate Change Impact on Multi-Objective Optimization: A Case Study on Educational Buildings,” presented at the The Symposium on Simulation for Architecture and Urban Design (SimAUD), (23 - 25 Mayıs 2020), Vienna, Avusturya, 2020, Accessed: 00, 2021. [Online]. Available: