Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
Browse
3 results
Search Results
Master Thesis Energy and exergy analysis of renewable energy utilization in cement production(01. Izmir Institute of Technology, 2025) Alaca, Pelin; Çağlar, Başar; Fard, Mousa MohammadpourGeleneksel çimento üretim yöntemlerine kıyasla daha yeşil enerji sistemleri alternatiflerini keşfetmek için çimento üretiminin enerji ve ekserji analizi çalışılmıştır. İki farklı yeşil enerji senaryosu dikkate alınmıştır. Temel senaryo geleneksel çimento üretimidir. İlk senaryoda atık rüzgar türbini kanatlarının pirolizi ve gaz türbini çimento fabrikasına entegre edilmiştir ve elektrik ihtiyacı gaz türbini tarafından karşılanmıştır. Aynı zamanda hammadde piroliz ünitesinin katı ürününden sağlanmıştır. Bu senaryo için sıcak akımları kullanmak üzere bir ön ısıtma sistemi düşünülmüştür. İkinci senaryoda, PEM elektrolizörü de çimento fabrikasına dahil edilmiştir. Burada kömürle değiştirilmek üzere PEM elektrolizöründen hidrojen üretilmiştir. Tüm senaryoların termodinamik modellemesi Engineering Equation Solver (EES) yazılımı aracılığıyla gerçekleştirilmiştir. Temel senaryonun enerji ve ekserji verimliliği sırasıyla % 61,60 ve % 20,21 olarak bulunmuştur. Termodinamik analiz dışında, özgül enerji tüketimi (SEC) ve CO2 emisyonları hesaplanmıştır. En düşük SEC, 1704 kJ/kg olan senaryo 1 ile elde edilmiştir. CO2 emisyonları, 0,219 kg CO2/kg çimento ile senaryo 2 için minimum olarak sonuçlanmıştır. Tüm bunlar göz önüne alınarak, daha yeşil ve daha az enerji tüketen bir sistem oluşturulmaya çalışılmıştır.Master Thesis Techno-Economic Optimization of Pv-Wind Hybrid Systems(01. Izmir Institute of Technology, 2023) Demirdal, İlke; Çağlar, BaşarIn this study, the technoeconomic optimization of hybrid renewable energy systems were investigated for a small community with 50 households located in Izmir Institute of Technology (IZTECH) Campus, Izmir. The renewable-based power systems have received significant attentions recently due to the recent effort for the transition from fossil fuels to renewable energy, but their technical and economical feasibilities for different sectors and application areas and the related optimum system configurations haven’t been clearly addressed. To fill this research gap, PV-battery and wind turbine-battery system were analyzed for a small community from technical and economic point of views and the most economic configurations were explored for different level of grid-dependency by using the Loss of Power Supply Probability (LPSP) method. The annual electricity load profile was built in hourly basis based on the monthly total electricity consumption of each house and electricity consumption habits of residents. PV and wind turbine power outputs, the involvement of batteries were modelled in MATLAB/Simulink considering the meteorological data (IZTECH Meteorological Mast and NASA POWER), types of PV panel, wind turbine and battery. The mismatch between energy demand and supply was determined and different hybrid configurations were considered to cover this mismatch to different extents. The optimum number of PV panel, wind turbine and batteries were determined and the levelized cost of electricity were calculated for each scenario. The most economic configuration is the one consisting of 3 wind turbines and 7 batteries with 49.62% energy utilization from the grid.Master Thesis Hybrid Renewable Energy Systems Design for Green Campus-Iztech(01. Izmir Institute of Technology, 2022) Ramazan, Beste; Çağlar, Başar; Açıkkalp, EminThis study focuses on evaluating of standalone PV and Wind systems integrated with energy storage technologies to meet the electricity needs of the Izmir Institute of Technology campus in Izmir. University campuses with their high energy demand are one of the most important application areas for renewable energy systems and it’s critical to determine the types of renewable energy technologies, their size, and techno-economic feasibility for possible future implementation. Solar and wind energy were chosen as renewable energy sources based on the location and renewable energy potential of the IZTECH Campus. Two different energy storage systems are proposed to prevent any loss of power supply in standalone mode: (i) Lead-acid battery and (ii) Electrolyzer, hydrogen storage tank, and hydrogen-powered generator. Models were developed using the dynamic library-based structure of the TRNSYS program. The hourly electrical load was generated based on monthly data taken from the electricity supplier and the power output of PV modules was calculated based on the fixed tilt angle based on real meteorological data for the campus location. The electricity demand and generation were analyzed hourly for one calendar year. The number of PV modules was determined to meet the annual electricity demand of the campus while the capacity and number of energy storage modules were determined based on the maximum accumulative energy deficiency in a year. The round-trip efficiencies and the depth of discharge for the battery and the hydrogen storage efficiency for the hydrogen-based storage option were considered in the analysis. Parameters were calculated for both systems and simulation analyzes were evaluated. An economic cost analysis was performed for each system. In addition, suggestions are made for possible system improvements.