Üçtuğ, Fehmi Görkem
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Uçtuğ, Fehmi Gorkem
Uctug, Fehmi Gorkem
Üçtuğ, Fehmi̇ Görkem
Uctug, F. G.
Uctug, Fehmi Gorkem
Üçtuğ, Fehmi̇ Görkem
Uctug, F. G.
Job Title
Email Address
gorkem.uctug@ieu.edu.tr
Main Affiliation
05.10. Mechanical Engineering
Status
Current Staff
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ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
4
Research Products
3GOOD HEALTH AND WELL-BEING
0
Research Products
4QUALITY EDUCATION
0
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5GENDER EQUALITY
0
Research Products
6CLEAN WATER AND SANITATION
2
Research Products
7AFFORDABLE AND CLEAN ENERGY
23
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8DECENT WORK AND ECONOMIC GROWTH
6
Research Products
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
18
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10REDUCED INEQUALITIES
0
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11SUSTAINABLE CITIES AND COMMUNITIES
13
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12RESPONSIBLE CONSUMPTION AND PRODUCTION
27
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13CLIMATE ACTION
25
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14LIFE BELOW WATER
8
Research Products
15LIFE ON LAND
2
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16PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
17PARTNERSHIPS FOR THE GOALS
4
Research Products
Documents
33
Citations
490
h-index
11
Documents
31
Citations
448
Scholarly Output
35
Articles
30
Views / Downloads
236/311
Supervised MSc Theses
3
Supervised PhD Theses
0
WoS Citation Count
376
Scopus Citation Count
426
Patents
0
Projects
12
WoS Citations per Publication
10.74
Scopus Citations per Publication
12.17
Open Access Source
9
Supervised Theses
3
| Journal | Count |
|---|---|
| Sustaınable Productıon And Consumptıon | 3 |
| Energy, Ecology and Environment | 2 |
| Internatıonal Journal of Envıronmental Scıence And Technology | 2 |
| Scıence of the Total Envıronment | 2 |
| Environmental Development | 1 |
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34 results
Scholarly Output Search Results
Now showing 1 - 10 of 34
Article Citation - Scopus: 1Life Cycle Assessment of Black Tea Production and Consumption in Turkiye: Insights From Waste Management Scenarios(Elsevier, 2025-07) Uctug, Fehmi Gorkem; Ediger, Volkan S.; Kucuker, Mehmet Ali; Berk, Istemi; Inan, Ali; Tugcu, MelisaThis study conducts a life cycle assessment (LCA) of tea production and consumption in T & uuml;rkiye, the world leader in per capita tea consumption. Aiming to identify environmental hotspots and propose sustainable solutions, a cradle-to-grave LCA was performed using CCaLC2 software, CML methodology, and the Ecoinvent 3.0 database. It covers cultivation, processing, transportation, and consumption stages, focusing on key environmental indicators like carbon footprint and acidification potential. The results reveal that consumption dominates the environmental footprint (91%) due to energy-intensive brewing methods. Cultivation and transportation contribute minimally (4% each). This highlights the need for promoting energy-efficient brewing practices and consumer adoption of renewable energy sources. The study also explores the environmental implications of different waste management strategies. Composting emerged as the most beneficial approach for reducing the carbon footprint and photochemical oxidants creation, while incineration might be preferable for other impact categories. This study underscores the importance of addressing energy consumption during tea brewing and encouraging renewable energy use among consumers. Additionally, it promotes composting as a crucial waste management strategy for a more sustainable tea value chain in T & uuml;rkiye. These findings offer valuable insights for policymakers, industry players, and tea drinkers to make informed decisions that minimize environmental impact.Article Citation - WoS: 22Citation - Scopus: 26Carbon Footprints of Omnivorous, Vegetarian, and Vegan Diets Based on Traditional Turkish Cuisine(Elsevier, 2021-04) Uctug, Fehmi Gorkem; Gunaydin, Dorukhan; Hunkar, Beliz; Ongelen, Cansu; Görkem ÜÇTUĞ, FehmiTurkish cuisine is one of the most globally wide-spread and also nutritionally diverse diets in the world. Yet, to this day the environmental footprint of Turkish cuisine has not been studied. In this work, the carbon footprints of weekly omnivorous, vegetarian, and vegan diets based on traditional Turkish cuisine were calculated. The functional unit was selected as 20 00 kcal of daily intake per person, CCaLC (TM) was used as software alongside CML2001 methodology, and c cradle-to-grave approach was employed. The following stages were included in the life cycle inventory: raw material supply including packaging, meal preparation (energy required for cooking or baking), and end-of-life treatment. On average, the omnivorous, vegetarian and vegan diets were found to have carbon footprints of 35.22, 27.8 and 18.5 kg CO(2)eq. per functional unit, respectively. The reduced carbon footprint of the vegetarian and vegan diets was mainly attributed to the absence of meat and dairy products. Raw material supply emerged as the main hotspot with an average share of 77.2% in the overall carbon footprint, followed by meal preparation with a share of 21.5%. End-of-life treatment options did not have a significant effect on the carbon footprint. The results were found to be highly consistent with those reported earlier in the literature. Extrapolating the results showed that nutrition is roughly responsible for one third of the total carbon footprint of Turkey. The main conclusion was that Turkish cuisine is comparable with other major cuisines in terms of its environmental impacts, while offering a very diverse and healthy diet. (c) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.Article Citation - WoS: 1Life Cycle Assessment of Tomato Paste Production: a Case Study(Pamukkale Unıv, 2024) Üçtuğ, Fehmi Görkem; Tekin, Zehranur; Dayıoglugil, Zeynep; Ulusoy, Ercan; Oktaylar Keyik, Şule; Keyik, Sule OktaylarThis study involves the cradle -to -gate life cycle assessment of tomato paste production in Turkey. All the data was obtained from a large-scale production company located in north-west Turkey in 2020. CCaLC software with Ecoinvent2 database alongside CML2001 method was used for the analysis and the following impacts were taken into account: acidification potential, carbon footprint, eutrophication potential, human toxicity potential, ozone layer depletion potential, and photochemical smog potential. Functional unit was chosen as 1 kg of tomato paste sold in glass jars. The results show that the biggest contributor to environmental impacts was the raw material supply stage, mainly due to fungicide (for agriculture) and metal (for packaging) use. Energy required for agricultural and production processes were also found to have significant effects of the impacts. The results were found to be in very good consistency with earlier literature. Using photovoltaic panels for meeting 10% of the electricity demand of agricultural and production processes or utilizing tomato harvesting waste to produce biomethane were found to have almost no positive effects as far as impact reduction is concerned. These results show that switching to organic farming seems to be essential if environmental impacts of processed food products such as tomato paste are to be reduced.Conference Object Energy Management in Organized Industrial Zones: Promoting the Green Energy Transition in Turkish Manufacturing Industry(IEEE Computer Society, 2024-06-10) Ediger, V.Ş.; Küçüker, M.A.; Berk, I.; Inan, A.; Üçtuǧ, F.G.Organized Industrial Zones (OIZ), which gained legal status by Law 4562 of 2000, played a significant role in Turkish industrialization policies, particularly in improving Small and Medium-sized Enterprises (SMEs). The energy management (EM) within OIZs is essential for Türkiye's green transition and 2053 net-zero pathway. Following the publication of a directive on OIZ's electricity market activities in 2006, enterprises can purchase electricity directly from OIZ management. Moreover, the Energy Efficiency Law No. 5627 of 2007 required OIZs to establish an energy management unit (EMU) to serve the participants with less than 1000 tons of oil equivalent (toe) energy consumption. EMUs provide OIZ management with a unique opportunity to enhance sustainable energy transition by increasing renewable energy production and improving the energy efficiency of participating enterprises. The primary goal of this research is to evaluate the effectiveness of energy management units in OIZs in encouraging energy efficiency and green energy transition in the Turkish manufacturing industry. As a case study, we examine EM in the Adana Haci Sabanci Organized Industrial Zone (Adana OIZ), which ranks third among OIZs regarding electricity consumption. We analyze data on electricity infrastructures, roof-top PVs, invoice settlements/offsets, energy efficiency investments, and GHG emissions between 2017 and 2023. Our preliminary findings suggest that EMU in the Adana OIZ makes a very important contribution to the green transition of industrial establishments and that regulatory changes over the last decades have had positive effects. The share of renewable energy in the total energy mix increased from 1.6% to 21.4% over six years, and there has been a noteworthy enhancement in energy efficiency, reaching 27% in 22 companies evaluated. The main policy implication of our findings is that the role of regulatory bodies and efficient energy management in OIZs will be critical in achieving Türkiye's net zero target of 2053. © 2024 IEEE.Article Citation - WoS: 31Citation - Scopus: 32Life Cycle Environmental Impacts of Domestic Solar Water Heaters in Turkey: the Effect of Different Climatic Regions(Elsevier Science Bv, 2018-05) Uctug, Fehmi Gorkem; Azapagic, AdisaSolar water heating (SWH) systems could help reduce environmental impacts from energy use but their performance and impacts depend on the climate. This paper considers how these vary for residential SWH across four different climatic regions in Turkey, ranging from hot to cold climates. Life cycle assessment was used for these purposes. The results suggest that in the hotter regions, the impacts of SWH are 1.5-2 times lower than those of natural gas boilers. A similar trend was observed in the two colder regions except for acidification, which was four times higher than that of the boiler. The raw materials and electricity required for the manufacturing of the systemswere found to be themost important contributors to the impacts. Recycling themajor components instead of landfilling reduced human toxicity potential by 50% but had only a small effect (5%) on the other impacts. The impactswere highly sensitive to the type of material used for the construction of the hot storage tank, butwere not affected by transport and end-of life recycling. The only exception to the latter is human toxicity potential which decreased significantly with greater recycling. Extrapolating the results at the national level showed that SWH systems could reduce the annual greenhouse gas emissions in Turkey by 790 kt CO2-eq. and would save the economy $162.5 million per year through the avoided imports of natural gas. All other impacts would also be reduced significantly (3-32 times), except for acidification which would double. Therefore, SWH systems should be deployed more extensively in Turkey but government incentivesmay be needed to stimulate the uptake. (c) 2017 Elsevier B.V. All rights reserved.Article Citation - WoS: 4Citation - Scopus: 5Environmental and Economic Life Cycle Assessment of a Run-Of Type Hydroelectricity Power Plant in Turkey(Wiley, 2021-07-27) Bor Türkben, Aslı; Uctug, Fehmi Gorkem; Bor, AslıThe environmental and economic life cycle assessment of a real-life run-of-the-river type hydroelectricity power plant in Turkey has been performed by considering the following stages: raw material acquisition, construction (including waste management), and transportation. CCaLC2 software and CML2001 methodology were used to calculate six different environmental impacts, whereas the economic impact was chosen as the levelized cost of electricity (LCOE). Functional unit was 1 MWh of electricity generated. The environmental impacts were found to be on average 95% lower than those of the Turkish grid, and the LCOE was calculated as $58.4/MWh. This outcome is understandable considering the high share of fossil fuels, especially low-quality lignite, in Turkish electricity grid. The results were compared to those of a similar study conducted abroad and all the impacts were found to have the same order of magnitude, proving that this study is methodologically consistent with the literature. The main conclusion is that hydroelectricity produced by run-of-the-river type plants in Turkey is environmentally friendly and economically viable compared to grid electricity. This is the first study in Turkey on the life cycle impact analysis of hydroelectricity and one of the few studies that consider economic and environmental factors simultaneously.Article Citation - WoS: 2Citation - Scopus: 2Feasibility Analysis of a Photovoltaic/Battery Energy Storage Hybrid System: an Hourly Estimation Based Approach and a Real Life Case Study(College Publishing, 2017) Uctug, Fehmi Gorkem; Baltali, Vedat CanThis study has been undertaken to develop a consumer-oriented feasibility method for a hybrid photovoltaic (PV)-battery energy storage (BES) system by analyzing a real life house in Istanbul, Turkey, as a case study. The hourly electricity demand of the house was estimated by carrying out a detailed survey of the life style and daily habits of the household. No algorithm of any kind was used for the estimation of the energy demand with the exception of relating the lighting requirement to the daylight hours and the heating and cooling requirements to the seasonal weather changes. The developed method estimates the annual demand with an overall error of 8.68%. The net grid dependency and the feasibility of the PV-BES system was calculated for different combinations of PV and BES system sizes. It was found that when the maximum available roof area is used for PV installation and when the BES system size is increased, it is possible to achieve almost zero net grid dependency, and it is estimated that houses that are in regions with more abundant solar radiation and/ or with lower annual electricity consumption, can reach zero net grid dependency. However, the feasibility indicator, which is the payback period, turned out to be no less than 25 years in any of the scenarios. The reasons for the infeasibility are the high prices of PV and BES systems as well as the current restriction in the regulations in Turkey, which prevents BES system owners from participating in unlicensed energy generation schemes and selling excess electricity back to the grid. In order to overcome this situation, regulations should be updated to allow BES system owners to benefit from feed-in-tariff schemes, thereby increasing the popularity of both PV and BES usage in Turkey.Article Citation - WoS: 1Citation - Scopus: 1Gate-To Life Cycle Assessment of Petrochemicals Production in Türkiye: a Case Study of Acrylonitrile and C4(Springernature, 2024-11-29) Uctug, Fehmi Gorkem; Vali, Vasif; Tok, Neslihan; Fereidani, Bahar M.The widespread use of acrylonitrile (Acyrlonitrile) and crude C4 across industries has significantly boosted global manufacturing of these energy-intensive petrochemicals. A life cycle assessment was employed to evaluate the environmental impact of Acyrlonitrile and C4 production, aiming to promote sustainability in the petrochemical supply chain. Modeling integrated refinery-petrochemical plant operations in T & uuml;rkiye revealed that Acyrlonitrile production emitted 7.46 kg CO2eq./kg, while C4 production emitted 1.62 kg CO2eq./kg. The Acyrlonitrile production was found to be more environmentally polluting, especially in terms of acidification potential, photochemical smog potential and eutrophication potential with 4.5 kg SO2eq., 3.88 kg C2H4eq. and 2.39 kg PO4eq. per kg Acyrlonitrile respectively. Waste disposal, natural gas use, propane and nitrogen emission have been the major hotspots of Acyrlonitrile production, while natural gas use and lubricant oil for C4. On average, the production stage emerged as the primary hotspot, for Acyrlonitrile production contributing 58% to overall impacts. The results of water footprint identified 3.13 L per kg Acyrlonitrile and 0.99 L per kg C4 production, with aromatics and ethylene plants being the key contributors. Adoption of energy efficiency measures and circular economy principles is recommended to mitigate environmental impacts. This study sheds light on the resource-intensive petrochemical supply chain, offering valuable insights into environmental impact assessment in this sector. ACN production emits 7.46 kg CO2eq/kg, C4 emits 1.62 kg CO2eq/kg.Production stage is hotspot: ACN - 58%, aromatics plant - 40% of impacts.Carbon footprint and acidification categories are influenced by the high energy intensity of the Acrylonitrile and C4 production phases.Waste disposal, natural gas use major contributors; energy efficiency crucial.Article Citation - WoS: 48Citation - Scopus: 56An Optimization Model for Carbon Capture & Storage/Utilization Vs. Carbon Trading: a Case Study of Fossil-Fired Power Plants in Turkey(Academic Press Ltd- Elsevier Science Ltd, 2018-06) Agrali, Semra; Uctug, Fehmi Gorkem; Turkmen, Burcin AtilganWe consider fossil-fired power plants that operate in an environment where a cap and trade system is in operation. These plants need to choose between carbon capture and storage (CCS), carbon capture and utilization (CCU), or carbon trading in order to obey emissions limits enforced by the government. We develop a mixed-integer programming model that decides on the capacities of carbon capture units, if it is optimal to install them, the transportation network that needs to be built for transporting the carbon captured, and the locations of storage sites, if they are decided to be built. Main restrictions on the system are the minimum and maximum capacities of the different parts of the pipeline network, the amount of carbon that can be sold to companies for utilization, and the capacities on the storage sites. Under these restrictions, the model aims to minimize the net present value of the sum of the costs associated with installation and operation of the carbon capture unit and the transportation of carbon, the storage cost in case of CCS, the cost (or revenue) that results from the emissions trading system, and finally the negative revenue of selling the carbon to other entities for utilization. We implement the model on General Algebraic Modeling System (GAMS) by using data associated with two coal-fired power plants located in different regions of Turkey. We choose enhanced oil recovery (EOR) as the process in which carbon would be utilized. The results show that CCU is preferable to CCS as long as there is sufficient demand in the EOR market. The distance between the location of emission and location of utilization/storage, and the capacity limits on the pipes are an important factor in deciding between carbon capture and carbon trading. At carbon prices over $15/ton, carbon capture becomes preferable to carbon trading. These results show that as far as Turkey is concerned, CCU should be prioritized as a means of reducing nationwide carbon emissions in an environmentally and economically rewarding manner. The model developed in this study is generic, and it can be applied to any industry at any location, as long as the required inputs are available. (C) 2018 Elsevier Ltd. All rights reserved.Article Citation - WoS: 8Citation - Scopus: 12Life Cycle Assessment-Based Environmental Impact Analysis of a Tier 4 Data Center: a Case Study in Turkey(Elsevier Ltd, 2023-03) Görkem Üçtuğ F.; Can Ünver T.; Görkem Üçtuğ, Fehmi; Can Ünver, Tayyar; Unver, Tayyar Can; Uctug, Fehmi GorkemData centers are responsible for 1% of the global electricity consumption, leading to significant greenhouse gas emissions. This study is considered to be the first in the literature which uses life cycle assessment to investigate the environmental impacts of a tier-4 data center operation. The impacts were calculated via CCaLC software with Ecoinvent2 database by using CML2001 method. Office supplies, electricity, water and fuel consumption, direct emissions, and end-of-life treatment where applicable were considered in the system boundaries. The results show that more than 98% of the environmental impacts are caused by the electricity consumption in the data center. It was found out that improvements made in cooling and uninterrupted power supply systems have the potential to reduce the annual impacts by approximately 15% on average. Compared to the average data center in the United States, the data center analyzed in this study was found to have approximately 20% higher impact scores. The main conclusion of this study is that it is evident that governments should provide incentives such as tax deductions to promote energy efficiency and/or renewable energy utilization in the data centers for better impact mitigation. © 2023 Elsevier Ltd
