Energy efficiency in historic buildings: Scenario-based evaluation on Tahtani Mosque

The need for energy is increasing in the developing and changing world with the advancement of technology. The increase in energy use has brought along several problems. Some of these are the depletion of energy resources and the emergence of negative environmental impacts (global warming, greenhouse gas emissions, etc.). The uncontrolled use of energy resources has been a topic of interest to many researchers. Various studies have been carried out to control energy consumption and ensure its efficiency. The building sector accounts for 40% of total energy consumption. Improvements to be made in this sector will make a significant contribution to reducing total energy consumption. Historic buildings within the building groups are an important part of our culture. Improving the energy performance of these buildings is important in terms of both saving energy and ensuring the sustainability of the building. In this study, the current energy use of the Historical Tahtani Mosque in Gaziantep has been analyzed in detail and it is aimed to put forward solutions that will save energy and increase the sustainability of the building. In this thesis, the current state (ID-0) energy model of the Historic Tahtani mosque was created and factors such as building materials, insulation status, lighting, and heating-cooling systems that affect energy consumption were analyzed. Afterward, scenarios to increase energy efficiency were created using the building energy simulation model. In these scenarios, changes were made according to the current situation. As a result of the analysis, the proposed scenario was selected as ID-7. In the proposed scenario (ID-7), underfloor heating instead of air conditioning, laying 10 cm rock wool on the roof for insulation, and using LED lighting with sensors instead of fluorescent bulbs are proposed. With the selected scenario, it is shown that the energy efficiency of Tahtani Mosque can increase by 31.87%. Accordingly, it has been determined that 11,020.97 kg CO2, 78.46 kg NOx, 328.82 kg SOx-equivalent emissions can be reduced by saving 37,366 kWh/year of energy. In addition, sensitivity was taken during the testing phase to ensure that the applications to be proposed are applications that will not harm the historical texture. This study sets an example in calculating the energy efficiency of historic buildings using HBIM and DesignBuilder. This study, which offers a holistic approach by combining energy optimization and ensuring the sustainability of historical buildings, offers both scientific and practical contributions