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A novel multi-generation system integrating thermophotovoltaic and SOFC system for power and green hydrogen with CO2 liquefaction: A techno-economic and multi-objective optimization study
No full textThis study proposes a novel biomass-fueled multi-generation system that addresses key limitations in existing SOFC-based configurations, such as unutilized radiative heat and the lack of integrated CO2 capture. The system integrates a digestion unit, solid oxide fuel cell (SOFC), thermophotovoltaic (TPV) unit, closed Brayton cycle, vanadium chloride hydrogen production cycle, and a CO2 liquefaction module. A major innovation lies in recovering the SOFC's radiative waste heat via the TPV unit, significantly boosting total power output and improving overall sustainability. The system utilizes biogas and air in separate pathways for electrochemical and combustion processes, while waste heat is recovered to drive the Brayton cycle, support hydrogen production, and enable CO2 liquefaction through LNG-based cooling. This integrated approach reduces fossil fuel dependency and greenhouse gas emissions. A comprehensive energy, exergy, techno-economic, and environmental analysis is performed, along with multi-objective optimization using the Grey Wolf Optimizer under two scenarios. Parametric studies identify the combustion chamber temperature as a key performance driver. The integration of TPV and cryogenic CO2 capture improves energy utilization and environmental impact. The optimized system achieves a net power output of 2,798 kW, an exergy efficiency of 35.44 %, and a CO2 emission index of 0.6353 kg/kWh. The system achieves a hydrogen production rate of 0.01285 kg/s, with payback periods ranging from under four to under seven years depending on electricity price and operational lifespan. These results confirm the proposed system's potential as a high-efficiency, low-emission solution for decentralized clean energy and fuel production.No sponso
Identifying challenges, benefits, and recommendations for utilizing solar panels in sport stadiums: A thematic analysis
No full textRenewable energies are the need of today’s world and future based on the evidences which are available.
Actually, there are many types of renewable energy which are now being used. One of the main types is solar
energy since it is available and very well known in scientific communities and industrial procedures. Solar energy
is the sustainable energy resource and can be utilized in different places. One of the significant parts is in sport
arenas. Basically, nowadays sport industry like other sectors are converging to the use of renewable energies
especially solar energy. Nonetheless, there are some challenges in this application. Here, the potential draw
backs are named and mentioned in details. Moreover, benefits also are embedded. Hence, this study focuses on
the mere use of solar energy and its corresponding pros and cons. The comprehensive data are gathered by
reviewing the previous work to illuminate the characteristics of this valuable energy resource in sport stadiums
and arenas. We used the interviews and thematic method by interviewing in-depth with eight expert. Our finding
revealed the challenges: economic and social challenges, the structure of the stadiums, policy and regulations,
and the technical aspect. We also presented many benefits such as reducing emissions, reducing costs and sustainable development for sports stadiums.No sponso
Transcontinental evolutionary dynamics and phylogeography of Alectoris (Aves: Galliformes): Identifying refugia, dispersal corridors, and cryptic diversity in the Palearctic region
No full textThe Alectoris (Galliformes: Phasianidae) has a wide distribution range in the Palearctic region, with seven species and 27–31 subspecies that were distinguishable by minor morphological differences. The members of the genus exhibit distinct genetic structuring compatible with geography due to their inability to make long flights and ground-dwelling behaviors. In this respect, the evolutionary history of the genus and its populations is a useful tool for identifying potential cryptic refugia, dispersal corridors, and strong barriers for bird species in the Palearctic region. On the other hand, wild populations of the genus are among the bird species most affected by human activities. For this purpose, sequences from the mitochondrial D-loop and Cyt-b regions of individuals from the genus Alectoris were studied to identify the evolutionary history of the genus, determine potential cryptic species, and reveal possible hidden diversification areas in the Palearctic region. The results indicated that: the Mediterranean basin is the ancestral area of the Alectoris, there are two main diversification centers within its distribution range (Mediterranean Basin and China) of the genus, and certain micro-refugia and permanent dispersal corridors have been observed in Eastern Palaearctic region. Additionally, the results showed that the Pleistocene climatic changes acted as a species pump, playing a significant role in the diversification of lineages within the genus. Anatolia served as the ancestral area for the A. chukar and acted as a bridgehead during the species' dispersal in the inner side of the Eastern Palaearctic. High mountain ranges, monsoonal climate types, and deserts in the Eastern Palearctic played a significant role in the dispersal and diversification of the ancestral A. chukar population. Importantly, human activities appear to be the greatest evolutionary force shaping the future evolution of the genus.Scientific and Technological Research Council of Turkey (TUBITAK) and Akdeniz University Scientific Research Projects Coordination Unit
Real-Time modeling of a solar-driven power plant with green hydrogen, electricity, and fresh water production: Techno-Economics and optimization
No full textSolar energy is important for the future as it provides a clean, renewable source of electricity that can help combat climate change by reducing reliance on fossil fuels via implementing various solar-based energy systems. In this study, a unique configuration for a parabolic-trough-based solar system is presented that allows energy storage for periods of time with insufficient solar radiation. This model, based on extensive analysis in MATLAB utilizing real-time weather data, demonstrates promising results with strong practical applicability. An organic Rankine cycle with a regenerative configuration is applied to produce electricity, which is further utilized for hydrogen generation. A proton exchange membrane electrolysis (PEME) unit converts electricity to hydrogen, a clean and versatile energy carrier since the electricity is solar based. To harness the maximum value from this system, additional energy during peak times is used to produce clean water utilizing a reverse osmosis (RO) desalination unit. The system’s performance is examined by conducting a case study for the city of Antalya, Turkey, to attest to the unit’s credibility and performance. This system is also optimized via the Grey Wolf multi-objective algorithm from energy, exergy, and techno-economic perspectives. For the optimization scenario performed, the energy and exergy efficiencies of the system and the levelized cost of products are found to be approximately 26.5%, 28.5%, and 0.106 $/kWh, respectively.No sponso
Auditability of digital models for compliance with conservation plan implementation provisions in architectural design
No full textMimarlıkta Sayısal Tasarım Ulusal Sempozyumu (19. : 2025 : Antalya, Türkiye)Mimari tasarım sürecinde koruma amaçlı imar planı hükümlerine uyumun sağlanması hem kısıtlayıcı hem de belirleyici bir etkendir. Dolayısıyla tasarımın erken aşamalarından itibaren koruma amaçlı imar planı uygulama hükümlerine uygunluğun kontrol edilmesi gerekmektedir. Bu süreç, elle yapılan kontrollere dayanmakta, zaman ve çaba istemektedir. Hata riskini arttıran bu tarz kontrol yöntemleri yerine dijital modellerin denetlenmesi, kontrol sürecini daha verimli hale getirebilecek ve hata payını azaltabilecektir. Kontrol sürecinin otomatik hale getirilmesi için yönetmeliklere uygunluk kontrol (ACCC- Automated Code Compliance Check) yazılım araçları geliştirilmiştir. Bu araçlar çoğunlukla IFC modellerinin kısıtlara uygunluğunun kontrol edilmesine dayanmaktadır.
Ülkemizde IFC modellerinin kontrollerine dayalı, Planlı Alanlar İmar Yönetmeliği için geliştirilmiş web tabanlı araç ile Plansız Alanlar İmar Yönetmeliği’nin hükümlerine uyumun denetlenebileceği bir model önerisi bulunmaktadır. Ancak dijital modellerin orijinal dosya formatından IFC modellerine çevrilmesi, kurallara uyumlu olmayan model elemanlarının tespiti veya modelde değişiklik yapılması gerektiğinde tasarımcıları modelleme aracına geri dönmeye zorlamaktadır. Bu gerekli değişiklikler, modelleme aracıyla kontrol aracının bağlantısız olması nedeniyle doğrudan yapılamamaktadır. Literatürde Revit eklentilerinin kullanımları; duvarların yangın dayanımının kontrolü, kapıların erişim şartlarını sağlayıp sağlamadığının test edilmesi ve enerji etkin tasarım koşullarının yerine getirilip getirilmediğinin denetlenmesi olarak örneklenmektedir. Çalışma, Revit platformunda oluşturulan dijital modellerin koruma amaçlı imar planları hükümlerine uygunluğunun geliştirilen Revit eklentisiyle kontrolünü ele almaktadır. Revit eklentisi C# programlama dilinde Revit API kullanılarak
Visual Studio ortamında oluşturulmuştur. Mimari modellerin geometrik olan ve geometrik olmayan verilerinin koruma amaçlı imar planı uygulama hükümlerinin yeni yapıya dair maddelerine uygunluğu denetlenmektedir. Plan hükümlerinin karmaşıklığı ve belirsizliği bu hükümlerin makine diline çevrilmesi sürecinde problemlere neden olmaktadır. Kesinlik içermeyen ve ihtimale dayalı hükümler çalışma kapsamı dışında tutulurken dijital model elemanlarının hesaplanabilir ve kıyaslanabilir özelliklerine odaklanan
hükümler çalışmada değerlendirmeye alınmıştır. Geliştirilen Revit eklentisi Elmalı (Antalya) Koruma Amaçlı İmar Planı Uygulama Hükümleri’nin yeni yapılaşmaya ilişkin hükümler başlığında yer alan maddeleri üzerinde test edilmiştir. Test sonuçları, geliştirilen Revit eklentisinin kısıtlara uygunluk sürecini iyileştirdiğini göstermektedir.Ensuring compliance with the provisions of the relevant conservation-oriented plan is both restrictive and a decisive factor in the architectural design process. Therefore, it is essential to check compliance with the implementation provisions of the conservation plan from the early stages of the design process. This process is carried out manually and requires a considerable amount of time and effort. Instead of such methods that increase the risk of errors, auditing digital models may streamline the process and reduce the margin of error. To automate control processes, different automated code compliance software tools were developed. These software tools are mostly based on checking conformance of IFC models with restrictions. In Turkey, there are automated code compliance checking tools based on IFC models such as a web-based code compliance checking tool for Planned Areas Zoning Regulations and the proposed model control approach for Unplanned Areas Zoning Regulation. However, the conversion of the digital model from the native file format of modelling tools to IFC models compels designers to go back to the modelling tools when alterations are needed, or non-conforming model elements are detected. These necessary alterations cannot be made directly due to the disconnection between the modelling tools and the automated code compliance checking tools. An embedded code compliance checking tool for Autodesk Revit is proposed to solve this problem. In the literature, the Revit Add-Ins have been used for checking the compliance of fire walls with specific conditions, verifying whether doors conform to accessibility rules, and evaluating energy efficient design requirements. The study focuses on the development of a Revit Add-In to check whether the digital models created in the Revit platform comply with the provisions of the conservation plans. The Revit Add-In was developed using the Revit API and C# in Visual Studio. The geometrical and nongeometrical data of elements in architectural models are audited within the scope of the articles on “new buildings” in the implementation provisions of conservation-oriented plans. The complexity and ambiguity of these articles cause problems when converting them into machine-readable formats. Whereas the provisions that imply probability and uncertainty are excluded, the provisions that focus on calculable and comparable features of digital model elements are evaluated. The developed Revit Add-In has been tested for the provisions on new buildings in the conservation-oriented plan implementation in Elmalı (Antalya). The test results show that the developed Revit Add-In improves the code compliance checking process.No sponso
Solar thermal assisted proton exchange membrane electrolyzer and solid oxide fuel cell system based on biomass gasification for green power and hydrogen production: Multi-objective optimization and exergoeconomic analysis
No full textThe industrial revolution led to technological advances but also exacerbated environmental issues, notably increasing carbon emissions. This study introduces a novel hybrid system combining photovoltaic-thermal (PVT), proton exchange membrane electrolyzer (PEME), gasification, solid oxide fuel cell (SOFC), and a Rankine cycle to address these challenges. The system features solar-assisted gasification with preheated air and water to improve syngas quality, increasing hydrogen content and enhancing combustion efficiency. The PEME unit uses excess solar electricity for green hydrogen production, ensuring a flexible clean fuel source, while oxygen produced by the PEME is injected into the SOFC cathode, improving electrochemical performance. This integrated system operates entirely on biomass-derived syngas, reducing reliance on fossil fuels. Comprehensive energy, exergy, and economic analyses confirm the system's potential, achieving 55.03 % energy efficiency and 50.64 % exergy efficiency, with a product cost of $0.125/kWh. A multi-objective optimization study showed an energy efficiency of 74.88 %, reducing the environmental impact to 0.24 kg/kWh. The results highlight the system's ability to optimize performance, cost-effectiveness, and environmental sustainability, offering a promising solution for industrial decarbonization.No sponso
Possibility of personalization and customization of the workplace by the knowledge workers
No full textWorkplace satisfaction is the key to the health, well-being and productivity of knowledge workers.
The mismatch between the physical environment and the personal desire of the worker negatively
affects satisfaction and productivity. Although employee comfort and well-being have been deeply
studied for the last decades, the current workplace services and practices lack allowing workplace
configuration by the knowledge workers, where the knowledge worker is the decision-maker on
workplace design and usage. This article investigates the configurability of workplace areas by
the knowledge worker prior to use and occupation. The study unveils that current workplace
services cannot meet the workplace configuration of the knowledge worker due to
organizational, operational and facilities management reasons. However, in-field studies
presented that when configuration options were provided, the knowledge workers pretended
to make selections to personalize and customize the workplace environment, with having
increased level of satisfaction due to the configuration process. On the other hand, the
proposed concepts preserve diverse risks and handicaps in facilities management perspectives,
although the possible implementation of the concept can maximize workplace satisfaction,
comfort, well-being and productivity of the knowledge workerNo sponso
How sport management can address sustainability:Creating and testing a scale
No full textSports and sustainability are two important aspects of modern society that are sometimes seen as conflicting (e.g., the large amounts of resource use and wastes for mega events like the Olympics can be problematic even though the event is popular with many). The relationship between the two is complex and multifaceted. In this study, best practices that sport management can apply to address sustainability are identified and assessed. In particular, we seek practical solutions for sustainability in the sports sector and present them to sports managers. The study involves three main steps: 1) a comprehensive review of previous studies and opinions of experts to identify initial relevant variables (25 variables); 2) application of factor analysis (FA) by the exploratory factor analysis test in SPSS 22.0 to create a new scale, after which five factors with 20 items remained; and 3) performance of confirmatory factor analysis using smart-PLS on the data. Eventually, in the revised CFA test and after elimination of one variable, the model was approved. The results reveal five key sport management actions and practices to address sustainability: implementing sustainable practices, educating stakeholders, developing policies, monitoring and reporting, and research and innovation. By addressing the environmental impact of sports events and promoting sustainable practices within the sports industry, a more sustainable future for both sports and the planet can be attained.No sponso
The impact of economic, social, and political globalization with economic complexity on economic vitality: the case of the UK
No full textHis paper explores the effects of economic complexity and globalization in
different economic, social, and political development aspects on ecosystem vitality with in the United Kingdom, covering 1995-2023. The study used FMOLS cointegration re gression and Impulse Response Function analyses on two empirical models composed of
linear and nonlinear components. The analysis shows a positive impact of growth com plexity and ecosystem vitality. This relationship may be driven by technological inno vation and improved resource efficiency. Economic globalization has a negative impact
on ecosystems, while social and political globalization has a positive effect. In addition,
we examine how GDP per capita, population density, education level, energy consump tion, and renewable energy influence ecosystem vitality. An early rise in GDP per capita
positively affects ecosystem vitality, but this effect turns negative after reaching a certain
threshold. Population density and energy use have adverse effects on ecosystem vitality,
while renewable energy, together with higher levels of education, have positive impacts
on ecosystem vitality. These findings suggest that integrated policies aimed at reconciling
such aspects as economic complexity, globalization, and other socio-economic factors
are required to ensure that the ecology remains sustainable despite development pro cesses occurring in the economy. They stress the significance of continuous interventions
for maintaining environmental benefits.No sponso
Evaluation of Climate and Energy Compatibility in Smart Cities through Fuzzy Logic Approach
No full textBuilding-based energy efficiency levels in five cities located in different climate zones of Turkey (Erzurum, Antalya, Rize, Istanbul, and Gaziantep) were analyzed using the fuzzy logic method. For each city, multi-criteria variables such as thermal insulation quality, annual energy consumption, building age, and user energy awareness were evaluated, and corresponding energy efficiency scores were calculated. According to the results, Istanbul demonstrated high energy efficiency, Antalya and Rize showed moderate efficiency, while Erzurum and Gaziantep exhibited low efficiency. The findings indicate that, in addition to climatic conditions influencing energy demand, factors such as building age and user behavior are also significant determinants.
Within the context of the smart city approach, this analysis highlights the importance of data-driven decision support systems in urban energy management strategies. Uncertainty-based systems like fuzzy logic offer a flexible means of evaluating complex relationships between multiple variables in smart cities. Moreover, the identification of regions with low efficiency paves the way for the development of policies such as urban transformation, public awareness campaigns, and the integration of innovative technologies. In this regard, climate-specific energy solutions tailored to each city play a critical role in achieving the sustainability goals of smart city planning. This study emphasizes the necessity of considering regional differences in energy efficiency in the implementation of smart city applications.No sponso