Yazarlar
- Kankal, Murat(17)
- Şan, Murat(17)
- Akinoglu, Bulent G.(14)
- Ozden, Talat(14)
- Nacar, Sinan(10)
- Barut, Abdulkadir(9)
- Akpinar, Adem(6)
- Akyol, Mehmet(6)
- Akçay, Fatma(6)
- Cakir, Mehmet Ali(6)
- Pilatin, Abdulmuttalip(6)
- Sezer, İsmet(6)
- Terhan, Meryem(6)
- Özden, Talat(6)
- Işık, Fatih(5)
- Kömürcü, Murat Ihsan(5)
- Pala, Fahrettin(5)
- Turan, Rasit(5)
- Akyol, Hikmet(4)
- Artan, Seyfettin(4)
- Hayaloğlu, Pınar(4)
- Peker, Iskender(4)
- Sezer, Ismet(4)
- Özbek, Adem(4)
- Adali, Zafer(3)
- Akpinar, A.(3)
- Akpinar, Muhammet Vefa(3)
- Altuner, Elif Esra(3)
- Ayaydın, Hasan(3)
- Başoğlu, Mustafa Engin(3)
- Bilgic, Abdulbaki(3)
- Bozbeyoglu, Pinar(3)
- Coruh, Emine(3)
- Eraslan, Selim(3)
- Erol, Ismail(3)
- Kaygusuz, Abdullah(3)
- Kaygusuz, Kamil(3)
- Mete, Emrullah(3)
- Nizetic, S(3)
- Okkan, Umut(3)
Yayınlar
- MakaleAçık Erişim2025Spatially explicit modeling of road icing susceptibility using GIS and a multi-criteria decision approach: A case study of Gümüşhane city (Türkiye)
Işık, Fatih; Kanyılmaz, Rabia; Çağlak, Savas; Eraslan, Selim; Zeybek, Halil İbrahim
This study develops and validates a GIS-based, spatio-temporal model to identify and prioritize road segments with high icing susceptibility in the Gümüşhane city center, Türkiye. Icing on urban roadways constitutes a significant threat to vehicular and pedestrian safety, particularly in regions characterized by complex topography and dense urban morphology. A Multi-Criteria Decision Analysis (MCDA) framework, employing the Analytic Hierarchy Process (AHP) with structured expert input, was used to synthesize ten primary causative factors. These include solar radiation, temperature, aspect, object height, precipitation, elevation, pavement material, slope, albedo, and road width — each representing a distinct topographic, climatic, or morphological influence on urban road icing. The AHP quantitatively established the relative influence of these factors, identifying solar radiation (28.5%), temperature (18.2%), and aspect (13.5%) as the most dominant drivers. The model generates monthly susceptibility maps that reveal "urban canyons"—narrow streets flanked by highrise buildings—consistently exhibit the highest and most persistent susceptibility due to severely limited solar radiation. The accuracy of the model's spatial predictions was quantitatively validated through field observations, with 91.4% of recurring icing locations correctly identified within high or very high susceptibility zones. This research culminates not only in a robust scientific framework but also in a validated decision-support tool that has been successfully integrated into the Gümüşhane City Information System (GCIS), where it is now operationally used to optimize winter maintenance strategies. Ultimately, this work provides a replicable, data-driven approach for enhancing urban resilience and traffic safety in challenging topographical settings.
- MakaleAçık Erişim2025The relationship between CO2 emissions, renewable energy and economic growth in the US: evidence from symmetric and asymmetric spectral granger causality analysis
Zuhal, Mustafa; Göcen, Serdar
This study analyzes the relationship between renewable energy consumption, CO2 emissions, and economic growth for 1973:M01-2022:M06 in the USA. The study employs Spectral Granger Causality analysis symmetrically and asymmetrically. The symmetric causality test presents a bidirectional causality relationship between CO2 emissions, renewable energy consumption, and economic growth. Regarding asymmetric causality results, there is bidirectional causality between positive and negative shocks of CO2 emissions, renewable energy consumption, and economic growth. The results suggest that renewable energy consumption is essential in increasing sustainable economic growth and environmental quality for the USA.
- MakaleYalnız künye2025Spatial and temporal patterns of drought under different scenarios for Türkiye in the 21st century
Yıldız, Mehmet Berkant; Nacar, Sinan; Şan, Murat; Kankal, Murat
This study investigates the impact of climate change on drought conditions in Türkiye for two distinct future periods: the near future (2021–2050) and the far future (2071–2100), under two emission scenarios (RCP4.5 and RCP8.5). High-resolution regional climate projections from 19 GCM-RCM combinations within the EURO-CORDEX framework were evaluated. Based on performance analysis against ERA5-Land data, the four best-performing models were selected for multi-model ensemble averaging (MMEA). Drought conditions were assessed using the Standardized Precipitation Index (SPI) at 3-, 6-, and 12-month time scales. Three trend analysis methods, Innovative Trend Analysis (ITA), Modified Mann-Kendall (MMK), and Sen's Slope, were applied to examine spatiotemporal drought patterns. SPI-based analyses show a significant increase in short- and medium-term variability (SPI-3 and SPI-6) and long-term droughts (SPI-12), especially in the Central Anatolia, Southeastern and Eastern regions. The applied trend detection methods consistently point to a widespread drying tendency, with more pronounced changes projected in the latter half of the century. Under the RCP4.5 scenario, although the drought signals are less severe, the persistence of negative trends highlights that Türkiye will still be at risk, even with moderate efforts to mitigate climate change. These findings underscore the urgent need for integrating climate-driven drought projections into national and regional planning efforts.
- MakaleAçık Erişim2025Changes of natural frequencies of masonry stone minarets due to temperature and humidity; [Yığma taş minarelerin doğal frekanslarının sıcaklık ve neme bağlı değişimleri]
Aymelek, Abdullah; Yanık, Yusuf; Yıldırım, Ömer; Türker, Temel
It is very important to distinguish the reason of change in natural frequencies of structures either caused by a possible damage or environmental conditions as temperature and humidity. In this study, the changes in the dynamic properties of masonry minarets under environmental effects such as temperature and humidity were investigated. The Minarets of İskenderpaşa, Hacı Kasım and Tavanlı Mosques in Trabzon were monitored by ambient vibration test method, the relationship between natural frequencies and temperature and humidity was tried to be determined. For this purpose, the natural frequencies of these minarets were measured at certain intervals under different temperature and humidity conditions over a period of approximately six months. The vibration measurement system which was developed by our research team was used in the measurements. From the data collected by these measurements, the variation intervals of the natural frequencies (the smallest and the highest values), the percentages of change and their relations with temperature and humidity were revealed. This relationship was determined by using linear-nonlinear simple and multiple regression analyses. From the study, it was found that the natural frequencies change under environmental effects such as temperature and humidity, and this rate of change was approximately 7%.
- MakaleYalnız künye2025Analysis of drought in upper Moulouya Basin (Morocco): a combination of drought indices, classic and innovative trend tests
Qadem, Zohair; Hadria, Rachid; Ettaqy, Abderrahim; Kankal, Murat; Şan, Murat; Nacar, Sinan
This study aimed to examine the temporal and spatial variation of drought in the upper Moulouya Basin, Morocco’s arid and semi-arid region. For this purpose, the Standardized Precipitation Index (SPI) was calculated at various time scales (3, 6, 12, and 24 months) using precipitation data collected from eight stations between 1977 and 2019. The data trends were analysed by classical modified Mann-Kendall (MMK) and Innovative Trend Analysis (ITA). Severe drought events were identified in the 1980s, and 1998–2000, while exceptionally wet years were recorded in periods 1996–1997 and 2008–2012. SPI trend analyses revealed a holistic increase on almost all timescales and at all stations. The increase was found to be higher in more extended time scales. Except for a few stations, SPI values in dry, normal, and wet classes of ITA method increased in the second half (1998–2019) compared to the first half (1978–1997). The ITA method detected different trends for different classes at two stations compared to the MMK method. This situation revealed the importance of analysing the trends of different methods in drought studies. These results are essential for water resources management and adaptation to climate change in arid and semi-arid zones.
- MakaleAçık Erişim2025The perspectives of nurses, as prominent advocates in sustainability, on the global climate crises and its impact on mental health
Ediz, Çiçek; Uzun, Sevda
Objective: To evaluate the perspective of nurses in Turkey towards the global climate crisis and its impact on mental health using a qualitative approach. Materials and Method: This study was conducted from August to September 2023 with 35 nurses living in seven regions of Turkey using an inductive qualitative approach. The researchers employed the snowball sampling method to select participants. Interviews with the participants were conducted until data saturation was reached. Thematic analysis was used to emerge themes. Results: The findings revealed five main themes (perception of the global climate crisis, effects of the global climate crisis, effects of the global climate crisis on mental health, reflections of the global climate crisis on nursing and nurses' views on prevention and intervention studies for the global climate crisis). Also, the findings revealed 12 sub-themes (physical outcomes, mental outcomes, direct and indirect impacts, psychosocial effects and personal, national and international-based reflections). Conclusion: Our study indicates that nurses exhibit genuine concern for the global climate crisis and experience psychological effects related to this pressing environmental issue. Nurses are keenly aware of their responsibility to safeguard the planet and demonstrate a strong sense of concern for the state of the world. Impact: It is evident that nurses, being prominent advocates for sustainability, are cognizant of their responsibility to protect the planet and demonstrate genuine apprehension for the state of the world. Implications: Nurses play a crucial role, as they make up 60% of the global healthcare workforce and are often the frontline healthcare professionals during natural disasters. It is vital to elucidate and clarify the terminology concerning the relationship between the climate crisis and the mental health of nurses, to determine the scope of this relationship and to make recommendations for future research areas. Patient or Public Contribution: No patient or Public Contribution.
- MakaleAçık Erişim2025The Impact of Militarisation on Environmental Degradation in the E7 Countries: Panel CS-ARDL Approach
Yildiz, Gizem Akbulut; Yildiz, Barış; Al, İbrahim; Kanca, Osman Cenk
This paper, within the framework of the Environmental Kuznets Curve (EKC), investigates the impact of militarisation on environmental degradation, including the role of renewable energy. Military expenditure and burden are used as proxies for militarisation, and models are estimated to quantify their relationship with carbon dioxide (CO2 ) emissions. The study utilizes the CS-ARDL approach to analyse data from Brazil, China, India, Indonesia, Mexico, Russia, and Turkey collectively known as the E7 nations from 1992 to 2022. The method employs both fixed-effect and random-effect models, taking into account short-run and long-run coefficients while accounting for cross-sectional dependencies and heterogeneities. The study puts forward four hypotheses for investigation, and a notable finding is that military expenditure, contradicting prevalent sustainability assumptions, has a substantial impact on the reduction of CO2 emissions over both short and long-run periods. This suggests that within the E7 context, militarisation may paradoxically function as a catalyst for environmental conservation rather than a detrimental impact. The findings further corroborate the inverted U-shaped EKC hypothesis by demonstrating that while economic growth initially increases emission levels, these levels begin to decline once a certain income threshold is reached. The study also underscores the long-run benefits of renewable energy in reducing CO2 emissions and advocates for investment in green energy projects, complemented by implementing viable environmental policies. These insights offer actionable guidance for policymakers seeking to harmonize economic development with environmental protection and sustainability objectives.
- MakaleYalnız künye2025Ecological effects of energy use and tourism-induced transport modes among coastline Mediterranean countries
Cakir, Mehmet Ali; Recepoğlu, Mürşit; Alola, Uju Violet; Alola, Andrew Adewale
Purpose: Motivated by the criticality of transportations system in tourism activities, this study further uncovers the effect of the main transportation modes arising from inbound tourism activities on the ecological footprint across the panel of selected coastline Mediterranean countries (CMC). Design/methodology/approach: The study considers a suitable econometric approach for the case of CMC with the dataset that covers the period 1998–2022. Findings: While the result reveals that all the modes of transportation except air deteriorate environmental sustainability by increasing ecological footprint in the long run, higher impact of environmental woe is associated with the land transportation. Similarly, the findings further show that economic expansion and conventional energy utilization in the examined panel and in each country spurs ecological footprint, thus worsening environmental quality. Meanwhile, for the country-specific observations, ecological footprint is (1) mitigated by tourism activities associated with air, water and land transports in Spain, (2) triggered by tourism activities associated with land transport in Croatia and (3) spurred by land transport in Italy. Originality/value: Policy inference from these results suggests the need to scale up the adoption of a low-emission transportation system in the countries.
- MakaleYalnız künye2025Ecological footprint components and agricultural productivity: Insights from MENA countries
Recepoğlu, Mürşit; Hayaloğlu, Pınar; Cakir, Sümeyra Cay; Artan, Seyfettin; Cakir, Mehmet Ali
The surge in the global population over the past century has highlighted the importance of agricultural production, leading to many studies to boost productivity. Unlike previous studies that primarily explore agricultural productivity growth, this study investigates how the subcomponents of the ecological footprint affect agricultural productivity in MENA countries between 1992 and 2021, identifying which types of environmental pollution have the most significant impact. Driscoll and Kraay (1998) method results show that ecological footprint has a major negative impact on agricultural productivity. Similarly, all ecological footprint components have a negative impact on agricultural productivity. The forest footprint has the highest coefficient magnitude, followed by crop land footprint, carbon footprint, fishing grounds footprint and grazing land footprint. The results have been tested for robustness using the Half-Panel Jackknife test to avoid biased results, and parallel results have been obtained. Finally, the causality between agricultural productivity and explanatory variables has been tested using Dumitrescu and Hurlin (2012) panel causality test. The findings suggest that policymakers may find it more effective to eliminate pollution rather than using additional resources to increase agricultural productivity. This approach allows for the reallocation of resources used in agricultural production to other areas.
- MakaleAçık Erişim2025Future of Clean Cooking Energy Access in Emerging Economies by 2030
Cakir, Mehmet Ali; Unlu, Ramazan; Cakir, Sümeyra Cay; Xanthopoulos, Petros
This study assesses the future of clean energy and technology access for cooking in emerging economic blocs—BRICS, MINT, ASEAN, and MENA—through 2030. Cooking contributes 3% of global greenhouse gas emissions, with over half of household emissions coming from cooking. Therefore, clean cooking energy is critical for sustainability and human health. The study aims to evaluate the likelihood of achieving the UN Sustainable Development Goal of universal clean cooking energy access by 2030 and the 2050 net-zero emissions target. Machine learning techniques, such as support vector regression, gradient boosting, and linear regression, alongside an ensemble approach, provide forecasts for these regions. The findings show a varied outlook. Within ASEAN, two countries are expected to reach 100% clean energy access for cooking by 2030, while two are likely to experience a decline. The MENA region shows stronger progress, with eight countries expected to meet the 2030 target. Among BRICS countries, only India is projected to reach full accessibility, while Russia faces a decline. The MINT countries face challenges, with none expected to meet the target, and Nigeria is projected to experience a decrease in clean energy access. The study concludes that the current trajectory makes achieving the 2030 Sustainable Development Goals and the 2050 net-zero emissions target unlikely for these regions. Policymakers must reassess their strategies and learn from successful countries to improve outcomes.
- MakaleAçık Erişim2025The Role of Green Finance in Investing in Environmentally Friendly Technologies: Risks and Returns
Erdoğdu, Aylin; Dayi, Faruk; Özbek, Adem; Ganji, Farshad; Benek, Ayhan
This study offers a comprehensive analysis of the performance and systemic dynamics of green finance investments in environmentally sustainable technologies from 2000 to 2025, complemented by scenario-based projections extending to 2050. Empirical results indicate a consistent increase in portfolio returns—from 5.2% in 2000 to 11.8% in 2025—accompanied by a significant reduction in annualized volatility, declining from 8.1% to 3.0%. Concurrently, the portfolio’s sustainability score improved from 0.45 to a full alignment score of 1.00, reflecting a strategic shift towards high-impact green assets. Building on these observed trends, this study introduces the Eco-Financial Resonance Theory (EFRT), an original conceptual framework that interprets sustainable transitions as emergent phenomena arising from resonant interactions among four interdependent domains: financial flows, technological innovation, policy and regulation, and environmental outcomes. Scenario analyses highlight the pivotal roles of policy ambition and innovation pathways in shaping long-term risk-return profiles, with optimistic forecasts projecting returns exceeding 40% by 2050, alongside markedly reduced risks. Regional analysis reveals persistent disparities, underscoring the necessity for context-specific strategies to enhance systemic coherence. Beyond its theoretical contributions, EFRT offers actionable insights for investors and policymakers aiming to align profitability with ecological sustainability. Collectively, these findings position green finance not merely as a niche or ancillary activity but as a transformative mechanism for enabling scalable and resilient sustainability transitions amid accelerating global environmental challenges.
- MakaleYalnız künye2025Revealing the environmental influences of energy, transport, and pollution taxes on different transportation modes
Artan, Seyfettin; Pata, Ugur Korkut; Hayaloglu, Pinar; Cakir, Mehmet Ali; Recepoglu, Mursit; Cay Cakir, Sumeyra
The need for transportation is increasing with the effect of globalization in the developing economic system. The transportation sector, which is essential for economic development, may pose some threats to a sustainable environment. Although European countries have achieved various successes in reducing carbon emissions, they are struggling to reduce carbon dioxide (CO2) emissions from transportation. To overcome this difficulty, European countries are using various policy instruments such as environmental taxes. In this context, this study investigated the impact of disaggregated environmental taxes (pollution, energy, and transport), structural change, and institutional quality on transport-related carbon emissions (water, air, and road transport) in 24 European countries over the period 2008-2022. To this end, the study uses the novel half-panel jackknife estimation and the bias-corrected method of moments. The results indicate that there is no long-term relationship between environmental taxes and water transportation-related CO2 emissions. In contrast, structural changes and pollution taxes are effective in reducing road and air transport-related CO2 emissions. These results suggest that European countries should focus on reducing CO2 emissions through effective pollution taxes and encourage carbon taxes instead of energy and transport taxes, thereby supporting the European Green Deal's goal of becoming the first climate-neutral continent.
- MakaleAçık Erişim2025Greening the OECD: Unravelling the Complex Relationship Between Natural Resource Efficiency, Technological Innovation and Population Density on Ecological Footprint
Çabas, Meral; Beser, Nazife Ozge; Ayaydin, Hasan; Barut, Abdulkadir; Magazzino, Cosimo
This paper aims to investigate the relationship among green environmental technologies, resource efficiency, population density and ecological footprint in 38 OECD member countries between 2000 and 2019. The Method of Moments Quantile Regression (MMQREG) and Augmented Mean Group (AMG) estimators are used to analyse this relationship. Based on the results, strong evidence of a negative relationship between green environmental technologies, resource efficiency, population density and ecological footprint emerges, suggesting that these factors contribute to environmental improvement in OECD economies. Overall, the findings contribute to a deeper understanding of the complex dynamics among these variables and provide valuable insights for policymakers and stakeholders striving for sustainable environmental management and policy formulation. In this context, countries should develop standard guidelines and best practices on green technologies and resource efficiency, making it easier for sectors to adapt in these areas.
- MakaleAçık Erişim2025FinTech driven green energy transition foreign direct investment and ecological footprint in BRICST countries
Ayaydin, Hasan; Ergün, Tolga; Barut, Abdulkadir; Erdem, Azad; Pilatin, Abdulmuttalip
The increasing emphasis on climate change and environmental sustainability worldwide has brought about the convergence and increased focus on financial technologies (FinTech) and green energy initiatives. In light of this, the study's objective is to investigate how FinTech moderates the relationship between the ecological footprint (EF) and green energy transition (GTE) in the BRICS-T nations between 1990 and 2021. This study examines how fintech moderated the GTE and EF in the BRICS-T from 1990 to 2021. We applied the Fully Modified Ordinary Least Squares (FMOLS) and used Dynamic Ordinary Least Squares (DOLS) as the main estimators for longitudinal analysis. In contrast, Driscoll-Kraay was used to verify the robustness of the results under cross-sectional dependence and heteroskedasticity. The results reveal that FinTech indirectly hinders EF by facilitating GTE. The outcomes also show that FinTech significantly constrains EF, while GDP and industrialization worsen EF. The results also confirm the important role of GTE and foreign direct investment (FDI) in reducing CO2 emissions in BRICS-T countries. Lastly, the paper offers policymakers useful recommendations for lowering EF in light of these outcomes. The study suggests establishing appropriate policies and strategies that encourage FinTech platforms to invest in green energy projects, including financial technology, promoting energy-efficient and low-carbon foreign direct investment, and encouraging GTE.
- MakaleAçık Erişim2024İklim Değişikliğine Dirençli Kentler: Dünya’da ve Türkiye’de İyi Yerel Yönetim Uygulama Örnekleri
Kaba, Elif Dilara
Nüfus artışı, kentleşme ve sanayileşme faaliyetleri başta sayılmak üzere çeşitli insan faaliyetlerinin atmosfere yaydığı gazlar, küresel iklim değişikliğine yol açmaktadır. Özellikle kentler, barındırdıkları yoğun nüfuslarına sundukları hizmetler ile sera gazı üretimini tetiklemekle birlikte iklim değişikliğinin yıkıcı etkilerine daha fazla maruz kalmaktadırlar. Bu çift yönlü etki, iklim değişikliği kaynaklı olumsuzlukların azaltılması ve uyum faaliyetlerinin gerçekleştirilmesi için kentsel politikalara duyulan ihtiyacı artırmaktadır. Kentsel politikalar ile kentlerde iklim değişikliğine karşı direnç oluşturmak, sürdürülebilir gelişimi destekleyecektir. Halka en yakın birimler olan yerel yönetimler, izleyecekleri kentsel politikalarla iklim değişikliğiyle mücadelede etkin rol alacaklardır. Çalışmanın amacı, iklim değişikliğine karşı dirençli kentler oluşturulmasında yerel düzeyde oluşturulan politikaların önemini ortaya koymak, iklim değişikliğine ilişkin mevcut yerel politikaların sorgulanmasını sağlamak ve politika önerilerinin geliştirilmesine katkıda bulunmaktır. Bu kapsamda, dünyada ve Türkiye'deki öncü kent örnekleri ışığında yerel yönetimlerin iklim değişikliğiyle mücadelede oluşturabileceği kentsel politikalar üzerinden önerilerde bulunulmuştur. İklim değişikliği ile dirençli kent kavramlarının birlikte ele alınması çalışmanın özgün değerini oluşturmaktadır.
- Derleme MakaleAçık Erişim2024A review on effects of diethyl ether on cyclic variations in diesel engines
Sezer, İsmet
Diethyl ether (DEE) can be used in diesel engines as a fuel or fuel additive. The review study was compiled from the findings of several studies in this area. The diverse techniques are employed to mitigate the detrimental pollutants emitted by diesel engines. The first approach to reducing emissions involves altering the fuel system and engine design to improve combustion, but this is an expensive and time–consuming process. The utilization of various exhaust gas devices, such as a particle filter and catalytic converter, is necessary for the second way. However, the engine performance could be negatively impacted by these tools. Additionally, these exhaust devices increases the vehicle and maintain costs. The use of different alternative fuels or fuel additives is the third way that reduces emissions while improving engine performance. The particulate matter (PM), smoke, and nitrogen oxides (NOx) are the main environmental pollutants released by diesel engines into the atmosphere. The decreasing PM and NOx emissions at the same time is practically very difficult. The majority of researches indicate that using alternative fuels, such as natural gas, biogas, and biodiesel, or blending additives with conventional or alternative fuels, is the best way to reduce emissions. However, the characteristics of the fuel have a significant influence on cycle variations, which have a significant impact on engine performance, fuel economy, and emissions. Therefore, it is very important that the results of studies on the impact of DEE on cyclic variation are evaluated together to practice applications and to guide future studies. As a result, the primary focus of this study is on the usage of DEE as a fuel or fuel additive with different diesel engine fuels. The aim of this review is to investigate, using the available knowledge in literature, how DEE affects cyclic variations.
- MakaleAçık Erişim2024Sustainability and Green Finance: Banking System in Turkey
Özbek, Adem
Today, one of the main factors that increases the importance of sustainability and green finance is the scarcity of resources that meet needs. Sustainability has important benefits in reducing environmental erosion, such as acting as a carrier for the transportation of existing resources to future generations. Green finance is the use of financial resources in projects that embrace climate change aspects in the creation of a sustainable environment. At this point, banks, which are at the center of the financial system, are at a key point in terms of both maintaining sustainability and directing economic resources to the right areas. In the study, existing sustainability and green finance legislation studies in Turkey were followed. In addition, an attempt has been made to compile the studies carried out by banks operating in Turkey on sustainability and green finance. As a result of the study, it was seen that significant regulations were not made in credit policies in the banking system in Turkey, especially in terms of reducing environmental pollution. At the same time, it is seen that public banks include more sustainability and green financing in their policies than private and foreign capital banks.
- MakaleAçık Erişim2024CO2 Emisyonu, Hava Yolu Taşımacılığı, Yenilenebilir Enerji Tüketimi ve Ekonomik Büyüme Arasındaki İlişki: Beşli Grup (G5) Örneği
Yıldız, Barış; Yildiz, Gizem
Çalışmanın amacı, CO2 emisyonu, hava yolu taşımacılığı, yenilenebilir enerji tüketimi ve ekonomik büyüme arasındaki ilişkiyi araştırmaktır. G5 (Brezilya, Çin, Hindistan, Meksika ve Güney Afrika) ülkelerini kapsayan bu çalışmada 1990-2018 dönemine ait panel veriler kullanılmıştır. Hava yolu taşımacılığı değişkeni, hava yolu yolcu taşımacılığı ve hava yolu yük taşımacılığı olmak üzere ayrı ayrı modellere dâhil edilmiştir. Ağırlıklandırılmış Ortalama Grup (AMG) tahmincisi kullanılarak modeller tahmin edilmiştir. Ampirik analiz sonucuna göre hava yolu yük taşımacılığı CO2 emisyonunu istatistiksel olarak anlamlı ve negatif etkilerken hava yolu yolcu taşımacılığına ilişkin istatistiksel olarak anlamlı bir bulgu elde edilememiştir. Bununla birlikte, her iki modelde ekonomik büyüme CO2 emisyonunu istatistiksel olarak anlamlı ve pozitif, enerji tüketimi ise negatif etkilemektedir
- MakaleAçık Erişim2024Thermal Power Plant Performance Analysis by Estimating Boiler Efficiency via Indirect Method: A Case Study
Celen, Pinar; Erdem, Hasan Hüseyin
In this paper, a coal (lignite) fired thermal power plant having capacity of 160 MW is taken into consideration and the impact of condenser pressure, moisture content of lignite, excess air coefficient, the efficiency of turbine pressure and heater numbers on power plant thermal efficiency is investigated. It is aimed to determine the performance losses of each equipment by means of thermodynamics and economic analysis. In this scope, it is expected that the power plant operator will be able to evaluate the reduction potential of equipment performance losses and ensure more effective use of the power plants by correctly planning the maintenance and rehabilitation needs and time. In the calculations, the boiler efficiency was determined with EN 12952-15 standard (indirect method) since this method has higher accuracy in coal-fired boilers. It is seen that the condenser pressure and excess air coefficient increments have no significant impact on power plant efficiency compared to moisture content of lignite, excess air coefficient, efficiency of turbine pressure and heater numbers. The significant effect is observed for fuel moisture content which rises from 22% to 47% and the power plant efficiency falls from 40% to 28%. The variation of the power plant thermal efficiency in case of failure of heaters is investigated and the power plant efficiency has decreased from 40.17% to 36.09% when the pre-heaters are no longer in to be in use because of any reason. In addition, revenue losses are estimated for each main equipment efficiency reduction for better use of power plant capacities and electricity lowering production costs.
- MakaleAçık Erişim2024Avrupa Birliği İklim Değişikliği Politikası: Politik Fırsatlar İçin İtici ve Destekleyici Faktörler
Ugur, Omer; Efşan, Nur Çelik
Kuruluşundan bugüne entegrasyon amaçlarını ekonomik alanla sınırlı bırakmayarak genişleten AB’nin çevreci adımları 1987 Avrupa Tek Senedi’yle ete kemiğe bürünmüş ve çevre konusu resmen AB’nin ortak politikası haline gelmiştir. AB’nin çevre politikası oluşturma arzusu normatif amaçlar taşımakla kalmayıp bir Birlik stratejisi olarak yerini almıştır. Bu bağlamda, bu çalışmanın amacı AB çevre politikasının gelişim sürecinin AB bütünleşme sürecindeki önemini ortaya koymaktır. Çalışmada çevre politikalarının yalnızca normatif bir amaca hizmet etmediği, AB’nin ekonomik ve siyasi bütünleşme sürecine de katkılar sunan stratejik bir alan olduğu açıklanmaktadır. Çalışmanın evreni AB olup, örneklemi iklim değişikliğinde politik fırsatlar için itici ve destekleyici faktörlerdir. Ele alınan itici faktör parametreleri; normatif ve sivil güç, önlem ilkesi, bilimsellik ilkesi, uluslararası işbirliği ve etkili çok taraflılık, sürdürülebilir kalkınma ve iklim göçünün güvenliği ilkeleridir. Çalışmada nitel araştırma tekniklerinden yararlanılmış ve literatür taraması yapılmıştır.
