International Journal of Energy Studies最新文献_第2页

Combustion Properties of Ethanol-Diesel Blend In SI Engine 乙醇-柴油混合物在 SI 发动机中的燃烧特性

International Journal of Energy Studies Pub Date : 2023-11-21 DOI: 10.58559/ijes.1376612

M. İlhak, Esenay Arslan

{"title":"Combustion Properties of Ethanol-Diesel Blend In SI Engine","authors":"M. İlhak, Esenay Arslan","doi":"10.58559/ijes.1376612","DOIUrl":"https://doi.org/10.58559/ijes.1376612","url":null,"abstract":"One of the renewable fuels is ethanol, which is widely used in internal combustion engines. Ethanol is produced from renewable sources such as sugar cane, corn, potato, and biomass. It has high octane number, however, lower calorific value than that of gasoline and diesel. Ethanol is a corrosive fuel and there is no passenger car designed for 100% ethanol. Therefore, ethanol was mixed with diesel fuel to both eliminate its corrosive effect and increase its calorific value and used to examine engine performance and exhaust emissions in an SI engine at partial loads in this study. Four-stroke and four-cylinder test engine was used, and the experiments were carried out at constant speed of 2000 rpm, at 25 Nm and 50 Nm load, and with different excess air ratios (λ). The fuel mixture used in experimental studies was set as 80%Ethanol+20%Diesel (E80D20). To see the effect of the E80D20 mixture more clearly, the same experiments were also repeated with pure gasoline and pure ethanol, and these three fuel conditions were presented comparatively. At 25Nm and 0.9 lambda, the use of E80D20 resulted in a 15% reduction in BSFC compared to the use of pure ethanol. When emissions are considered, the use of E80D20 in lean mixture (1.1 λ) showed a decreasing trend in HC and NOx emissions.","PeriodicalId":159867,"journal":{"name":"International Journal of Energy Studies","volume":"30 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139252165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of Propane Combustion at Different Equivalence Rates in a Premixed Model Burner 丙烷在预混合模型燃烧器中不同等效速率下的燃烧研究

International Journal of Energy Studies Pub Date : 2023-11-13 DOI: 10.58559/ijes.1311480

Kağan Cenk Mızrak, Murat Taştan

引用次数: 0

Energy and exergy analysis of the 1220MW natural gas-fired Hamitabat combined cycle power plant 哈米塔巴特 1220 兆瓦天然气联合循环发电厂的能量和放能分析

International Journal of Energy Studies Pub Date : 2023-11-11 DOI: 10.58559/ijes.1327547

Göksel Topal, T. Tanbay

{"title":"Energy and exergy analysis of the 1220MW natural gas-fired Hamitabat combined cycle power plant","authors":"Göksel Topal, T. Tanbay","doi":"10.58559/ijes.1327547","DOIUrl":"https://doi.org/10.58559/ijes.1327547","url":null,"abstract":"Natural gas-fired power plants have a significant role in power generation of Turkey with a 24.4% share in the installed capacity. In addition to increasing the renewable energy production and adding nuclear into electricity generation mix, Turkey has a national policy to improve the efficiencies of energy producing and consuming sectors. Hamitabat natural gas-fired combined cycle power plant (CCPP) that is located in Lüleburgaz district of Kırklareli is the first CCPP of Turkey and it was renovated and upgraded to an installed capacity of 1220 MW in 2017 with a 520 million € project. In this study, the energy and exergy analysis of the Hamitabat CCPP is carried out. A thermodynamic model is built by applying the conservation of mass and energy principles and operating data are obtained from the plant operators. Exergy analysis is performed with the exergy balance equation to determine the exergy efficiencies and improvement potentials of all components. Also, parametric analyses are carried out to investigate the methods to enhance the performance of the plant. The plant has thermal and exergy efficiencies of 59.70% and 58.52%, respectively and these values are 13.70% and 13.52% higher than the thermal and exergy efficiencies of the original plant, respectively. Results showed that the combustion chamber (CC) has the highest rate of exergy destruction, and it is responsible for 77.61% of the total irreversibilities. The improvement potential of the CC is found to be 67.992 MW, and the prevention of heat loss from CC can increase the thermal and exergy efficiencies of the plant by 3.88% and 3.80%, respectively. Parametric analyses showed that the plant performance can be enhanced by increasing the inlet temperatures of high- and intermediate-pressure turbines, and decreasing the pressures of condenser and high-pressure turbine.","PeriodicalId":159867,"journal":{"name":"International Journal of Energy Studies","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139280129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative Performance Analysis of NACA 2414 and NACA 6409 Airfoils for Horizontal Axis Small Wind Turbine 用于水平轴小型风力涡轮机的 NACA 2414 和 NACA 6409 机翼性能比较分析

International Journal of Energy Studies Pub Date : 2023-11-05 DOI: 10.58559/ijes.1356955

U. Kurt, Abdullah Tokul

{"title":"Comparative Performance Analysis of NACA 2414 and NACA 6409 Airfoils for Horizontal Axis Small Wind Turbine","authors":"U. Kurt, Abdullah Tokul","doi":"10.58559/ijes.1356955","DOIUrl":"https://doi.org/10.58559/ijes.1356955","url":null,"abstract":"While wind energy, which has an important place among renewable energy sources, is converted into electrical energy by means of wind turbines, the designs and aerodynamic behaviors of turbine blades gain importance in order to obtain optimal efficiency. The most important factor affecting the wind energy capture performance and aerodynamic behavior of the blade is the aerofil structure. In this study, the design and comparative performance analysis of NACA 2414 and NACA 6409 series airfoils under wind turbine conditions with 1x10^6 fixed reynolds number, 0-20^0 attack angles, constant air density and ambient conditions, 3kW nominal power and 2m blade length were carried out. The designs and analyzes for both airfoils were simulated using Q-Blade software version 2.0.5.2. While designing the blade, the propeller blade was divided into 20 equal parts so that there would be no aerodynamic interaction between the elements, and analyzes were made with a calculation method based on the Blade Element Momentum (BEM) theory. As a result, by comparing different features such as lift (Cl) and drag (Cd) coefficients, pressure distribution on the blades, power coefficients, it was seen that the NACA 6409 airfoil was more efficient than the NACA 2414 airfoil for small diameter wind turbines.","PeriodicalId":159867,"journal":{"name":"International Journal of Energy Studies","volume":"1161 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139289275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of the performance and emissions of a diesel engine fueled with waste tyre pyrolysis oil 以废轮胎热解油为燃料的柴油发动机的性能和排放调查

International Journal of Energy Studies Pub Date : 2023-11-01 DOI: 10.58559/ijes.1366789

Talha Ertürk, Ahmet Arslan, Erdal Tunçer, Battal Doğan, M. Yeşilyurt

{"title":"Investigation of the performance and emissions of a diesel engine fueled with waste tyre pyrolysis oil","authors":"Talha Ertürk, Ahmet Arslan, Erdal Tunçer, Battal Doğan, M. Yeşilyurt","doi":"10.58559/ijes.1366789","DOIUrl":"https://doi.org/10.58559/ijes.1366789","url":null,"abstract":"Today, studies have increased regarding alternative fuel blends in diesel engines. The aim of the present study is to examine the performance and emissions of waste tyre pyrolysis oil (WTPO) added to diesel fuel at different percentages in an compression-ignition (CI) engine. In the engine, tests were carried out at 1500 rpm at four different loads (25%, 50%, 75%, and 100%). Adding WTPO to diesel fuel increased fuel consumption, CO2, HC, and CO emissions, while reducing exhaust gas temperature. At the same load, HC emission increased by 13.3% as the ratio of pyrolysis oil in the fuel blend increased. While the exhaust gas temperature value of diesel fuel was 261oC at 25% load, this temperature dropped to 251oC for P40 fuel. When the load was 25%, the amount of CO2 emission ascended between diesel fuel and P40 fuel was 38.67%, while this increment reached 59.5% at the highest load. Based on the emission values obtained from the experiments and the literature review, it has been determined that WTPO can be used as an alternative fuel in near future when the fuel characteristics of it will enhanced.","PeriodicalId":159867,"journal":{"name":"International Journal of Energy Studies","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139305065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EXPERIMENTAL INVESTIGATION OF BIO-INSPIRED FLOW FIELD DESIGN FOR AEM and PEM WATER ELECTROLYZER CELLS AEM 和 PEM 水电解电池的生物启发流场设计实验研究

International Journal of Energy Studies Pub Date : 2023-10-25 DOI: 10.58559/ijes.1364651

Abdullah Emre Avci, M. S. Çögenli, Selahattin Çelik, Hasan Özcan

{"title":"EXPERIMENTAL INVESTIGATION OF BIO-INSPIRED FLOW FIELD DESIGN FOR AEM and PEM WATER ELECTROLYZER CELLS","authors":"Abdullah Emre Avci, M. S. Çögenli, Selahattin Çelik, Hasan Özcan","doi":"10.58559/ijes.1364651","DOIUrl":"https://doi.org/10.58559/ijes.1364651","url":null,"abstract":"Hydrogen is the strongest candidate to become the future fuel of the world to meet net-zero targets while it cannot be found in nature in pure form and the most major occurrence is in water or carbon-based forms. Therefore, external energy is needed to retrieve hydrogen in pure form where natural gas reforming is the most common method for over 90% of hydrogen production worldwide with carbon footprint followed by water electrolysis which is environmentally friendly. As clean methods PEM and AEL electrolysis are mature technologies while AEM takes increased attention with its unique dry cathode technology. This study examines how a nature-influenced (Bioinspired) and a serpentine flow channel design affects PEM electrolyzer and AEM electrolyzer cell functionality. The performance of the electrolyzers is assessed in terms of experimental polarization curves. It was decided to utilize Sustainion® XA-9 Alkaline Ionomer Powder as the ionomer solution and Fumasep FAS-50 as the membrane. The laminar flow analysis is performed using COMSOL Multiphysics. The efficiency of the PEM electrolyzer is 71% with the serpentine flow, while the efficiency is 73% with the biomimetic flow. The efficiency of the AEM water electrolyser is 25% using the same design. The low performance in AEM was interpreted as the inability to distribute the catalyst homogeneously on the membrane surface.","PeriodicalId":159867,"journal":{"name":"International Journal of Energy Studies","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139314191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation study of bio-inspired leaf flow field designs for direct methanol fuel cell 用于直接甲醇燃料电池的生物启发叶流场设计模拟研究

International Journal of Energy Studies Pub Date : 2023-10-18 DOI: 10.58559/ijes.1359236

Selahattin Çelik, Mikail Yagiz, Ahmed Emin Kiliç

{"title":"Simulation study of bio-inspired leaf flow field designs for direct methanol fuel cell","authors":"Selahattin Çelik, Mikail Yagiz, Ahmed Emin Kiliç","doi":"10.58559/ijes.1359236","DOIUrl":"https://doi.org/10.58559/ijes.1359236","url":null,"abstract":"The flow field design in the bipolar plate, which is a DMFC structure, is extremely important in the mass transfer in the fuel cell and the electrochemical reactions occurring in the cell. One of the main purposes of DMFC is to improve the flow plate in order to provide less pressure drop in all channels. Therefore, different leaf types have been investigated to improve the flow distribution performance of DMFC. Mulberry, Loquat and Fig leaves with similar properties were sized using the COMSOL Multiphysics program and designed by examining their environmental and physical properties. Flow and pressure distributions in accordance with the flow field design similar to leaf dimensions in two dimensions were investigated. The biological and physical properties of each bio-inspired leaf design are described and its compliance with the DMFC is explained. Finally, flow images are presented with a comparison of flow areas. When these studies in the literature are examined; while applying the bio-inspired approach, it was seen that the shape similarity approach was adopted. However, by specifying the leaf, the flow field was not created exactly in the size of the leaf. Although there is a research on the flow design in the PEM fuel cell, it has not been used at the same rate for the DMFC. Considering that it is suitable for the DMFC system with the flow channel designs in the bipolar plate in question, it is expected that the performances that will increase the flow transmission to optimum levels will also increase when used.","PeriodicalId":159867,"journal":{"name":"International Journal of Energy Studies","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139317589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of facade properties in terms of sustainability in green building certified office buildings 从可持续性角度评估绿色建筑认证办公建筑的外立面特性

International Journal of Energy Studies Pub Date : 2023-10-13 DOI: 10.58559/ijes.1185136

Zeynep Yanilmaz

{"title":"Evaluation of facade properties in terms of sustainability in green building certified office buildings","authors":"Zeynep Yanilmaz","doi":"10.58559/ijes.1185136","DOIUrl":"https://doi.org/10.58559/ijes.1185136","url":null,"abstract":"The energy crisis in the world and reaching the point of depletion of resources have pushed the construction industry to seek the use of renewable energy resources. The sustainability approach that comes to the fore with this has gained an important place in the construction sector as well as in all other sectors. The construction of office buildings, which have a high energy consumption rate among the building groups, within the framework of sustainability principles is a result of this search. From this point of view, the aim of the study is; evaluating the facade features of office buildings with green building certificate within the scope of sustainability and presenting the current practices. Within the scope of the study, 20 office buildings located in the world and in the literature were analyzed in detail in terms of their facade features. These analyzes are grouped under the titles of building envelope, facade material, integration of active and passive systems, and landscape design applications. In the light of the data obtained, it has been revealed that sustainable office buildings have facade applications for the use of renewable energy sources.","PeriodicalId":159867,"journal":{"name":"International Journal of Energy Studies","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139319572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Impact of Remote Working on Türkiye’s Energy Consumption and Greenhouse Gas Emissions: Learning from the Experiences of Covid-19 Era 远程工作对土耳其能源消耗和温室气体排放的影响：学习 Covid-19 时代的经验

International Journal of Energy Studies Pub Date : 2023-09-20 DOI: 10.58559/ijes.1269648

Mustafa Kaya, İzzet Ari

{"title":"The Impact of Remote Working on Türkiye’s Energy Consumption and Greenhouse Gas Emissions: Learning from the Experiences of Covid-19 Era","authors":"Mustafa Kaya, İzzet Ari","doi":"10.58559/ijes.1269648","DOIUrl":"https://doi.org/10.58559/ijes.1269648","url":null,"abstract":"Remote working emerged as an important alternative to office working. Türkiye put in force this practice in certain months of 2020 and 2021 during the Covid-19 pandemic that led to serious decline in energy consumption in this period. The aim of this study is to find out the contribution of remote working on reducing fuel consumption in passenger car and electricity demand in case the country’s whole potential is used. This article also analyzes the effect of remote working practices on reducing greenhouse gas emissions. Results show that the country can reduce 1.8 million tons of oil equivalent of its’ energy consumption which corresponds to 1.66% of the total energy consumption and USD 1.4 billion with 2019 prices. With a total of 7.73 million tons CO2 eq. emissions mitigation, Türkiye will be able to reduce its transport and electricity related emissions by 3.2% and 3.79%, respectively. Therefore, considering that Türkiye is a net fossil fuel importer country and a party to the Paris Agreement, it is necessary to promote remote working as a complementary energy efficiency and climate change policy. It is beneficial to consider the effect of remote working on energy consumption, including natural gas, during energy crises.","PeriodicalId":159867,"journal":{"name":"International Journal of Energy Studies","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139338346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of HOMER in Assessing and Controlling Renewable Energy-Based Hybrid EV Charging Stations across Major Turkish Cities 应用 HOMER 评估和控制土耳其主要城市基于可再生能源的混合电动汽车充电站

International Journal of Energy Studies Pub Date : 2023-09-05 DOI: 10.58559/ijes.1324236

Aykut Fatih Güven, Emrecan Yücel

{"title":"Application of HOMER in Assessing and Controlling Renewable Energy-Based Hybrid EV Charging Stations across Major Turkish Cities","authors":"Aykut Fatih Güven, Emrecan Yücel","doi":"10.58559/ijes.1324236","DOIUrl":"https://doi.org/10.58559/ijes.1324236","url":null,"abstract":"Facing the global increase in population, escalating energy demands, environmental impacts of internal combustion engines, and potential depletion of fossil fuels, the urgency of developing renewable energy systems becomes more evident. This study takes place during a period of rapid electric vehicle adoption and escalating demand for renewable energy. It presents optimization and comparative analysis of hybrid and off-grid charging stations across six distinct regions. The process of establishing off-grid hybrid charging stations in each region is critically analyzed, using the HOMER program to determine the most efficient placement. HOMER, an optimization tool for renewable energy systems, enables lifecycle cost analysis. This method not only strengthens our energy independence but also supports the economy and reduces carbon emissions, positively impacting the environment. Comparative optimization analysis, based on technical and economic metrics across the provinces, identifies Manisa as the optimal location for the planned electric vehicle charging station. The station is expected to generate a total energy of 3,049,337 kWh per year, with a Net Present Value of 7.24 M$, a Levelized Cost of Energy of $0.441 per kWh, an annual operation cost of $175,795, and an initial capital cost of 3.69 M$. In conclusion, this study aims to improve environmental outcomes and contribute positively to the economy by reducing reliance on fossil fuels and fostering a quick transition to renewable energy.","PeriodicalId":159867,"journal":{"name":"International Journal of Energy Studies","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139342573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0