Çağlar, Başar

Profile URL
https://hdl.handle.net/11147/15917
Name Variants
Çağlar, B.
Çağlar, B
Caglar, B.
Caglar, B
Caglar, Basar
Job Title
Email Address
basarcaglar@iyte.edu.tr
Main Affiliation
03.06. Department of Energy Systems Engineering
Status
Current Staff
Website
https://akademik.yok.gov.tr/AkademikArama/view/viewAuthor.jsp
ORCID ID
0000-0001-8732-6772
Scopus Author ID
22978373700
Turkish CoHE Profile ID
Google Scholar ID
aVCnZHwAAAAJ
WoS Researcher ID
L-9887-2019

Sustainable Development Goals

NO POVERTY1
NO POVERTY
0
Research Products
ZERO HUNGER2
ZERO HUNGER
1
Research Products
GOOD HEALTH AND WELL-BEING3
GOOD HEALTH AND WELL-BEING
0
Research Products
QUALITY EDUCATION4
QUALITY EDUCATION
1
Research Products
GENDER EQUALITY5
GENDER EQUALITY
0
Research Products
CLEAN WATER AND SANITATION6
CLEAN WATER AND SANITATION
3
Research Products
AFFORDABLE AND CLEAN ENERGY7
AFFORDABLE AND CLEAN ENERGY
18
Research Products
DECENT WORK AND ECONOMIC GROWTH8
DECENT WORK AND ECONOMIC GROWTH
4
Research Products
INDUSTRY, INNOVATION AND INFRASTRUCTURE9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
5
Research Products
REDUCED INEQUALITIES10
REDUCED INEQUALITIES
0
Research Products
SUSTAINABLE CITIES AND COMMUNITIES11
SUSTAINABLE CITIES AND COMMUNITIES
2
Research Products
RESPONSIBLE CONSUMPTION AND PRODUCTION12
RESPONSIBLE CONSUMPTION AND PRODUCTION
5
Research Products
CLIMATE ACTION13
CLIMATE ACTION
8
Research Products
LIFE BELOW WATER14
LIFE BELOW WATER
0
Research Products
LIFE ON LAND15
LIFE ON LAND
1
Research Products
PEACE, JUSTICE AND STRONG INSTITUTIONS16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
PARTNERSHIPS FOR THE GOALS17
PARTNERSHIPS FOR THE GOALS
0
Research Products
Documents

22

Citations

238

h-index

10

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Documents

19

Citations

230

Go to WoS profile
Scholarly Output

23

Articles

11

Views / Downloads

11425/4374

Supervised MSc Theses

10

Supervised PhD Theses

0

WoS Citation Count

117

Scopus Citation Count

126

Patents

0

Projects

1

WoS Citations per Publication

5.09

Scopus Citations per Publication

5.48

Open Access Source

8

Supervised Theses

10

JournalCount
International Journal of Hydrogen Energy3
Catalysis Structure & Reactivity1
Eurasia Proceedings of Science, Technology, Engineering and Mathematics1
Fuel1
Green Energy and Technology1
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Scholarly Output Search Results

Now showing 1 - 10 of 23
  • Article
    Citation - WoS: 22
    Citation - Scopus: 22
    Multiparameter-Based Product, Energy and Exergy Optimizations for Biomass Gasification
    (Elsevier, 2021) Çağlar, Başar; Tavşancı, Duygu; Bıyık, Emrah
    The thermodynamic modelling of biomass gasification was studied by using Gibbs free energy minimization approach. Different from the studies using the same approach, the simultaneous presence of all gasifying agents (air, H2O and CO2) was considered and a multiparameter optimization was applied to determine the synergetic effect of gasifying agents for hydrogen, syngas with a specific H2/CO ratio and methane production. The performance of gasification was assessed by using technical and environmental performance indicators such as product yields, cold gas efficiency, exergy efficiency, CO2 emission and the heat requirement of the gasifier. The results show that the simultaneous presence of gasifying agents does not create considerable changes in syngas yield, H2 yield, methane yield, CGE and exergy efficiency while it allows to tune the H2/CO ratio and the heat requirement of the gasifier. The highest syngas yield is observed at T > 1100 K and 1 bar and when SBR > 0.5 and/or CBR > 0.8 with the absence of air, at which CGE changes between 114% and 122% while exergy efficiency is between 77% and 86%. The results prove that CO2 offers several advantages as a gasifying agent and suggests that CO2 recycling from gasifier outlet is a useful option for the biomass gasification.
  • Article
    Citation - WoS: 4
    Citation - Scopus: 5
    Electrooxidation of Glycerol on Monometallic and Bimetallic Catalysts-Containing Porous Carbon Cloth Electrodes in an Alkaline Medium
    (Electrochemical Society, Inc., 2021) Çağlar, Başar; El Hassan, Youssef; Basak, Oğuzhan; Hepbaşlı, Arif
    The electrooxidation of glycerol was studied on monometallic (Pt/C, Co/C, Ni/C, Cu/C) and bimetallic catalysts (PtCo/C, PtNi/C, PtCu/C) - containing porous carbon cloth electrodes in an alkaline medium to gain insight about the potentials of electrodes for simultaneous hydrogen and chemical production. Physical and chemical properties of catalysts were characterized by using X-ray diffraction, X-ray photoemission spectroscopy, and transmission electron microscopy while electrochemical characteristics of electrodes were investigated by cyclic voltammetry, choronoamperometry, and electrochemical impedance spectroscopy. Bimetallic catalysts-containing electrodes showed higher glycerol electrooxidation activities and stabilities compared to monometallic catalysts-containing electrodes. The highest activity was observed on the PtCu/C-containing electrode due to its higher electrochemical active surface area and low kinetic and mass transfer resistance. It was also found that the presence of porous carbon cloth had a considerable effect on the glycerol electrooxidation activity.
  • Book Part
    Citation - Scopus: 1
    Biomass-Based Polygeneration Systems With Hydrogen Production: a Concise Review and Case Study
    (Springer Science and Business Media Deutschland GmbH, 2024) Hajimohammadi Tabriz,Z.; Mohammadpourfard,M.; Gökçen Akkurt,G.; Çağlar,B.
    This chapter discusses the importance of biomass-based polygeneration systems in producing hydrogen as a clean and safe energy carrier. The benefits of polygeneration systems, which can produce multiple products and minimize waste, are highlighted, and the need for clean and efficient hydrogen production is emphasized. This study gives a brief overview of hydrogen production from biomass-based polygeneration systems, which examines the systems in two main classifications: systems that use biomass as a potential and rich source of hydrogen and systems that exploit the energy content of biomass to run hydrogen production units. Furthermore, a new multigeneration system with hydrogen production has been introduced and thermodynamically evaluated. Also, its results have been obtained in a real situation. Overall, this chapter offers insights into the potential of biomass-based polygeneration systems in meeting energy demands while reducing environmental impact. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.
  • Master Thesis
    Modelling and Controlling of Hybrid Energy Systems With Hydrogen Storage
    (01. Izmir Institute of Technology, 2023) Denizli, Osmancan; Çağlar, Başar; Altın, Müfit
    Hybrid renewable energy systems are gaining more attention for the problems like Global Warming and high CO2 emissions. Another topic that increases its popularity is hydrogen. Because it is a very good alternative fuel. In this work, every component of a basic Hybrid Renewable Energy System (HRES) will be modeled and short-time simulations will be made for any transient response of individual components. MATLAB Simulink is used for every model and simulation. HRES includes a wind turbine, PV array, battery energy storage, and electrolyzer. The system is also grid-connected. Additionally, different control strategies are investigated, obtained, and created. Maximum Power Point Tracking (MPPT) algorithms for Wind Energy Conversion System (WECS) and PV array were conducted. A control algorithm that combines the battery and the PV array was made and necessary circuits were designed. An overall model for different sizes and operations is created. One-day-long simulations were made for 11 different cases. The user can alter the overall model for different turbines, PV modules, and battery sizes. The total amount of hydrogen produced, energy generation, and consumption were observed for every case.
  • Master Thesis
    Süperkapasitör Uygulamaları için Kenevir Sapı Kaynaklı Aktif Karbon Üretimi ve Performans Analizi
    (2025) İnan, Ece; Çağlar, Başar; Yılmaz, Selahattin
    Bu çalışmada, kenevir sapı biyokütlesinden türetilen aktif karbon elektrotlar, sistematik bir deneysel tasarım kullanılarak süperkapasitör uygulamaları için üretilmiş ve optimize edilmiştir. Sentez süreci, kontrollü karbonizasyonu farklı sıcaklıklarda (500-600 °C), aktivasyon sürelerinde (1-3 saat) ve ZnCl2/biomass ağırlık oranlarında (0.5-1 ) gerçekleştirilen kimyasal aktivasyonla birleştirmiştir. Özgül kapasitans ve enerji yoğunluğunu maksimize etmek amacıyla Box-Behnken tasarımı ve yanıt yüzey yöntemi (RSM) uygulanmıştır. Elde edilen aktif karbonlar, BET yüzey alanı analizi, Raman spektroskopisi, FTIR, SEM–EDX ve CV, GCD, EIS gibi elektrokimyasal ölçümlerle kapsamlı bir şekilde karakterize edilmiştir. En iyi performans gösteren örnekler, iyi geliştirilmiş hiyerarşik gözeneklilik ve orta düzeyde grafitik düzenlilik (ID/IG oranı 0.96'ya kadar) sergileyerek iyon taşınımını ve çift katmanlı kapasitansı artırmıştır. Elektrotlar, 0–1 V potansiyel aralığında 0.5 A/g akım yoğunluğunda 79.5 F/g özgül kapasitansa ulaşmış, 20 A/g akım altında 5000 çevrimden sonra ilk kapasitanslarının yaklaşık %78'ini korumuş ve coulombic verimlilik %97'nin üzerinde tutulmuştur. Sonuçlar, kenevir sapının yüksek performanslı gözenekli karbon elektrotlar üretmek için verimli ve sürdürülebilir bir öncü olabileceğini göstermektedir. Çalışma, termal ve kimyasal parametrelerin ince ayarının, yapısal ve elektrokimyasal özellikleri nasıl etkili şekilde şekillendirdiğini ortaya koyarak biyokütle kaynaklı süperkapasitör malzemelerinin geliştirilmesine yönelik değerli bilgiler sunmaktadır.
  • Master Thesis
    Hybrid Renewable Energy Systems Design for Green Campus-Iztech
    (01. Izmir Institute of Technology, 2022) Ramazan, Beste; Çağlar, Başar; Açıkkalp, Emin
    This 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.
  • Master Thesis
    Konut Uygulamaları için Termal Enerji Depolamalı Pvt Entegre Isı Pompası Sisteminin Teknoekonomik Değerlendirmesi
    (2025) Çağırır, Ümran Özge; Çağlar, Başar; Fard, Mousa Mohammadpour
    İklim değişikliği ve karbonsuzlaşma hedefleri, konut ısıtmasında düşük karbonlu çözümleri öne çıkarmaktadır. Bu çalışma, İzmir koşullarında fotovoltaik-termal (PVT) kolektör, hava kaynaklı ısı pompası (ASHP) ve faz değiştiren malzemeye (PCM) dayalı ısıl depolamayı birleştiren hibrit bir sistemi MATLAB tabanlı model ve enerji yönetim algoritmasıyla tekno ekonomik olarak inceler. Üç senaryo karşılaştırılmıştır: (1) yalnız ASHP, (2) PVT+ASHP, (3) PVT+TES+ASHP. Yalnız ASHP tamamen şebekeye bağımlı, IRR negatif ve LCOH doğal gazın >2 katıdır. PVT entegrasyonu şebeke elektriğini azaltır; ancak ısı yüküne katkısı 25 modülde bile <%20 olup ekonomik açıdan olumsuz kalır. PVT+PCM ile performans belirgin artar; 200 kWh PCM ve 4 PVT'de ısı yükü bütünüyle PVT+TES ile karşılanır; LCOH ≈ 0.091 $/kWh, IRR ≈ %1.2, geri ödeme ≈ 21.5 yıl; toplam LCOE 0.114 $/kWh ile yalnız ASHP'den (0.123) düşüktür. Duyarlılık analizi, sonuçların PVT/PCM maliyetlerine ve elektrik fiyatına en hassas olduğunu; düşük alım tarifesinin fazla PV elektriğinin değerini sınırladığını gösterir. Bu bulgular, Akdeniz iklimlerinde PVT ve PCM entegrasyonunun ASHP sistemlerinin teknik performansını ve kendi kendine yeterliliğini artırmasına rağmen, sistemlerin mevcut Türkiye pazar koşullarında ekonomik olarak cazip olmadığını göstermektedir. Ana sonuç, bu tür hibrit konfigürasyonların ekonomik olarak uygun hale gelebilmesi için sistem maliyet azaltımları, politika teşvikleri veya optimize edilmiş sistem tasarımı gerektirdiği ve bu koşullar sağlandığında uzun vadeli sürdürülebilir ısıtma stratejilerine gerçekçi bir katkı sunabileceğidir.
  • Master Thesis
    Thermo-Catalytic Pyrolysis of Unrecycled Plastic Waste in a Lab-Scale Experimental Set-Up: Determination of Optimal Operating Conditions
    (01. Izmir Institute of Technology, 2022) Ekici, Ecrin; Yıldız, Günay; Çağlar, Başar
    370 million tons of polymers are produced worldwide annually (with an annual growth of 4%), of which ca. 16% are produced in the European Union (EU). By 2030, it is estimated that over 600 million tons of plastics will be produced. Plastic waste is a problem and will be severe day by day for the environment. This problem can easily switch to advantage by a carbon-neutral process: pyrolysis. This study analyzed and compared reported literature data with the experimental findings obtained in a continuously operated bench-scale pyrolysis reactor. The optimal conditions of the feedstocks' N2 flow rate, feed intake, and mixing ratio for maximizing liquid production were estimated for pyrolysis by Taguchi’s orthogonal array design. Optimized process parameters were used for the pyrolysis of fresh and waste counterparts of HDPE, LDPE, PP, and a defined mixture of those (25:25:50 wt.%) at 450°C. The tail gases of mixed fresh and waste POs were also examined for energy autonomy of pyrolysis. Fresh plastics yielded more liquid compared to waste plastics. Blending polyethylenes with PP improved the conversion efficiency and favored the formation of gasoline-range hydrocarbons while limiting the wax formation. The total energy potential of produced NCGs, mainly composed of C3 hydrocarbons, was found to be sufficient; the energy demand for endothermic bond breaking during pyrolysis was met in a range of 139 to 464% for various plastic types tested.
  • Article
    Citation - WoS: 4
    Citation - Scopus: 4
    Unveiling the Bi-Functional Potential of Cowo4 Hybridized With Tubular G-C3n4 for Highly Photocatalytic Hydrogen Production, Water Purification and Supercapacitance Activities
    (Pergamon-elsevier Science Ltd, 2025) Erdem, Nurseli Gorener; Tuna, Ozlem; Inan, Ece; Caglar, Basar; Ertis, Irem Firtina; Simsek, Esra Bilgin
    In this paper, CoWO4 nanospheres were successfully hybridized with graphitic carbon nitride with tubular morphology (TCN) and the photocatalytic antibiotic degradation, hydrogen evolution and supercapacitor performances were examined in detail. The morphological, structural and optical properties were characterized. The hybrid CoWO4/TCN-2 catalyst showed the highest tetracycline degradation efficiency with the rate constant of 0.0198 min(-1) which was 3.73 and 5.21 times greater than that of CoWO4 and TCN samples, respectively. The rate of photocatalytic hydrogen evolution was found to be 1997 mu mol/g.h for CoWO4/TCN-2 which was 2.03-fold and 1.09-fold higher than of TCN and CoWO4 samples, respectively. Electrochemical analysis revealed that the charge storage in CoWO4, TCN, and CoWO4/TCN electrodes was mainly governed by faradaic processes. All electrodes showed high-rate capability (>85 %), coulombic efficiency (>90 %) and cycle stability (>100 %). While CoWO4 and TCN electrodes show higher redox activities and specific capacitances than CoWO4/TCN composites, this limitation is mitigated by enhanced wettability in CoWO4/TCN electrodes. Notably, the CoWO4/TCN-2 electrode exhibits superior long-term capacitance, surpassing the TCN electrode after 2000 GCD cycles. This work offers new application areas for the metal tungstate/carbon nitride photocatalysts with improved photocatalytic and electrochemical performances.
  • Article
    Citation - WoS: 31
    Citation - Scopus: 33
    Energy and Exergy Analysis of a Pv-T Integrated Ethanol Pem Electrolyzer
    (Pergamon-Elsevier Science Ltd, 2021) Çağlar, Başar; Araz, Mustafa; Özcan, Hüseyin Günhan; Çalışan, Atalay; Hepbaşlı, Arif
    A photovoltaic-thermal (PV-T) integrated ethanol proton exchange membrane electrolyzer (PEME) was proposed as a low-energy consuming energy storage option for renewable-sourced electricity as well as a way for simultaneous chemical production in this study. Energy and exergy analyses were applied to each component of the system (e.g., pumps, heat exchanger, PV-T, PEME, and separation unit (SPU)) and the whole system to assess the system performance. The mathematical modelling of the whole system along with its main components except for the SPU was done using the Engineering Equation Solver (EES) software package while the SPU was modelled through the ASPEN Plus. A detailed modelling of the PEME was also included. The effects of the PV-T and PEME parameters on energy and exergy efficiencies of the system were evaluated while the improvement potentials and scale up options were discussed. Energy and exergy efficiencies of the proposed system at the optimum operation of the PEME and under average climatic conditions in the city of Izmir, Turkey were determined to be 27.8% and 3.1%, respectively. Energy and exergy efficiencies of the system were mainly regulated by the PV-T and PEME, whose energy and exergy efficiencies were 40.6%, 56.6% and 13.8%, 14.1%, respectively. Effective PEME parameters for energy and exergy efficiencies of the system were membrane conductivity, membrane thickness, anode catalyst and the operation temperature of the PEME. By changing the PV-T and PEME parameters and by scale-up, energy and exergy efficiencies of the system could be improved.