Science and Technology for Energy Transition最新文献_第8页

Possible environmental impacts of Salihli and Turgutlu Biomass Power Plant (Manisa/Turkey) Salihli和Turgutlu生物质发电厂(土耳其马尼萨)可能对环境造成的影响

Science and Technology for Energy Transition Pub Date : 1900-01-01 DOI: 10.2516/stet/2023012

M. Ozcelik

引用次数: 0

Impact prediction model of acetone at various ignition advance by artificial neural network and response surface methodology techniques for spark ignition engine 基于人工神经网络和响应面方法的火花点火发动机丙酮在不同点火阶段的冲击预测模型

Science and Technology for Energy Transition Pub Date : 1900-01-01 DOI: 10.2516/stet/2022010

S. Uslu, M. Yeşilyurt, H. Yaman

{"title":"Impact prediction model of acetone at various ignition advance by artificial neural network and response surface methodology techniques for spark ignition engine","authors":"S. Uslu, M. Yeşilyurt, H. Yaman","doi":"10.2516/stet/2022010","DOIUrl":"https://doi.org/10.2516/stet/2022010","url":null,"abstract":"In this study, it was aimed to predict and optimize the effects of acetone/gasoline mixtures on spark ignition engine responses at different engine speeds and ignition advance values with artificial neural network and response surface methodology. The regression results obtained from response surface methodology show that absolute variance ratio values for all answers are greater than 0.96. Correlation coefficient values obtained from artificial neural network were obtained higher than 0.91. Mean absolute percentage error values were between 0.8859% and 9.01427% for artificial neural network, while it was between 1.146% and 8.957% for response surface methodology. Optimization study with response surface methodology revealed that the optimum results are 1700 rpm engine speed, 2% acetone ratio and 11° before top dead center ignition advance with a combined desirability factor of 0.76523%. Additionally, in accordance with the confirmation analysis among the optimal outcomes and the estimation outcomes, it was stated that there is a great harmony with a maximum error percentage of 7.662%. As a result, it is concluded that the applied response surface methodology and artificial neural network models can perfectly provide the impact of acetone percentage on spark ignition engine responses at different engine speeds and ignition advance values.","PeriodicalId":272133,"journal":{"name":"Science and Technology for Energy Transition","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134239342","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: 7

Hydrogen and air storage in salt caverns: a thermodynamic model for phase equilibrium calculations 盐穴中氢气和空气的储存:相平衡计算的热力学模型

Science and Technology for Energy Transition Pub Date : 1900-01-01 DOI: 10.2516/stet/2023004

Abdoul Fattah Kiemde, N. Ferrando, Jean-Charles de Hemptinne, Y. Le Gallo, A. Réveillère, Juan Sebastian Roa Pinto

{"title":"Hydrogen and air storage in salt caverns: a thermodynamic model for phase equilibrium calculations","authors":"Abdoul Fattah Kiemde, N. Ferrando, Jean-Charles de Hemptinne, Y. Le Gallo, A. Réveillère, Juan Sebastian Roa Pinto","doi":"10.2516/stet/2023004","DOIUrl":"https://doi.org/10.2516/stet/2023004","url":null,"abstract":"When storing gas in a salt cavern, it occupies most of the excavated volume, but the lower part of the cavern inevitably contains residual brine, in contact with the gas. The design of hydrogen and compressed air storage in salt caverns requires to have a thermodynamic model able to accurately predict both phase properties such as densities, and phase equilibrium (gas solubility and water content of the vapour phase). This work proposes a parameterization of the e-PPC-SAFT equation of state in this context. Experimental data of pure components and mixtures of light gas + pure water and light gas + salted water are reviewed and used to fit pure component parameters for hydrogen, nitrogen, oxygen, and the brine, and binary interaction parameters between H2, O2, N2 + water and H2, O2, N2 + ions (Na+ and Cl−), for temperature ranging from 273 to 473 K and salinities up to NaCl saturation (6 mol/kg). The model developed delivers good accuracy in reproducing data: the average deviation between experiments and calculated data is between 3% and 9% for gas solubility in saturated brine. More interestingly, the model has been validated on its capability to predict data not included in the parameterization database, including the composition of the vapor phase, and its extension to a mixture, such as air. Finally, it has been used in a case study of Compressed Air Energy Storage (CAES) to evaluate the water content of the gas produced during injection-withdrawing cycles.","PeriodicalId":272133,"journal":{"name":"Science and Technology for Energy Transition","volume":"34 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120901659","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: 1

Hybrid solar, wind, and energy storage system for a sustainable campus: A simulation study 可持续校园的混合太阳能、风能和能源存储系统:模拟研究

Science and Technology for Energy Transition Pub Date : 1900-01-01 DOI: 10.2516/stet/2023008

Dario Cyril Muller, S. Selvanathan, E. Cuce, Sudhakar Kumarasamy

{"title":"Hybrid solar, wind, and energy storage system for a sustainable campus: A simulation study","authors":"Dario Cyril Muller, S. Selvanathan, E. Cuce, Sudhakar Kumarasamy","doi":"10.2516/stet/2023008","DOIUrl":"https://doi.org/10.2516/stet/2023008","url":null,"abstract":"The reliance on grid electricity generated from fossil fuels in many countries continues to contribute to annual CO2 emissions. Implementing renewable energy systems helps reduce the carbon footprint and enhances local grid stability, particularly in areas with high demand where power outages are frequent. This study used the Hybrid Optimization of Multiple Energy Resources (HOMER) software to determine the most cost-effective composition of a Hybrid Renewable Energy System (HRES). Simulation results indicate that a system comprising a 3007 PV array, two 1.5 MW wind turbines, and a 1927 kW converter is most suitable. Combining solar panels and wind turbines remains the most economically feasible option for on-site electricity production. The study demonstrates that installing a hybrid renewable energy system is viable on an academic campus, with an initial investment cost of US $6.58 million and yearly operational costs of US $1.38 million, which is 40.8% lower than the current system. The project payback time is estimated to be 10.11 years. These findings may be used to recommend similar systems in other regions with comparable climatic conditions. The positive monetary effects may incentivize policymakers to implement comparable systems, contributing to a carbon-neutral goal.","PeriodicalId":272133,"journal":{"name":"Science and Technology for Energy Transition","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114941518","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: 1

Experimental study of biogas production from water hyacinth 水葫芦产沼气的实验研究

Science and Technology for Energy Transition Pub Date : 1900-01-01 DOI: 10.2516/stet/2023010

Djomsi Brillant Wembe, Rolland Djomi, N. Konai, Gilles Nkadeu, G. Ntamack

{"title":"Experimental study of biogas production from water hyacinth","authors":"Djomsi Brillant Wembe, Rolland Djomi, N. Konai, Gilles Nkadeu, G. Ntamack","doi":"10.2516/stet/2023010","DOIUrl":"https://doi.org/10.2516/stet/2023010","url":null,"abstract":"In the Littoral and East regions of Cameroon, the proliferation of the water hyacinth threatens the conservation of biodiversity. Indeed, its rapid multiplication asphyxiates fish and promotes malaria. Integrated pest management and many other methods have been used to eliminate this plant, but it persists, endangering the eco-systemic balance of marine environments. The efficient management of this plant remains a challenge. The aim of this study is to contribute to the implementation of a water hyacinth management protocol. The idea was to use this plant not only for natural fertilizer for soil improvement but also as energy production (biogas). The tests were carried out at the HIMA application farm in the Abong-Mbang area. Experiments were conducted using 60-Liters batch digesters. In all three sets of experiments, combinations of water hyacinth, cow dung and chicken droppings were used. For water hyacinth alone, an average production of 70 L of biogas was recorded. The best yield was obtained for the mixture of water hyacinth (5 kg), cow dung (1.5 kg) and chicken droppings (1 kg) at 1/4 dilution, i.e. 179 L/kg of substrate. The results obtained are encouraging and are being effectively used. This technology can therefore be applied in areas infested by Eichhornia crassipes for the production of energy, compost and control of water hyacinth proliferation.","PeriodicalId":272133,"journal":{"name":"Science and Technology for Energy Transition","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130643235","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

Performance and emission characteristics of salviniaceae filiculoides aquatic fern oil and SiO2 nano additive biodiesel in CI engine 水蛭科水生蕨类植物油和二氧化硅纳米添加剂生物柴油在CI发动机中的性能及排放特性

Science and Technology for Energy Transition Pub Date : 1900-01-01 DOI: 10.2516/stet/2022021

Kannan Thurairaj Rajeswari, Sheeju Selva Roji Selvadas

{"title":"Performance and emission characteristics of salviniaceae filiculoides aquatic fern oil and SiO2 nano additive biodiesel in CI engine","authors":"Kannan Thurairaj Rajeswari, Sheeju Selva Roji Selvadas","doi":"10.2516/stet/2022021","DOIUrl":"https://doi.org/10.2516/stet/2022021","url":null,"abstract":"This present study deals the engine performance and emission of adding SiO2 nano additives in novel salviniaceae filiculoides aquatic fern biomass derived biodiesel. The primary aim of this present study was to investigate the effect of adding SiO2 nano additives into the Azolla Oil Methyl Ester (AZOME) as a sustainable biodiesel in the Compression Ignition (CI) engine and studying the engine performance and emission effects. The Azolla Oil Methyl Ester was prepared via transesterification process and blended with as-present diesel with various percentages. The SiO2 nano particles are mixed with AZOME using sonication. The test was conducted using a single cylinder Compression Ignition engine with different blends of AZOME biodiesel. The fuel was injected into the engine at different spill timings as 20°, 23°, and 26° Crank Angle (CA) before (b) Top Dead Centre (TDC). According to the results the break thermal efficiency of AZOME and its SiO2 blends were improved with spill timings. On compare with the conventional diesel the Injection Time (IT) of 23° b TDC and the average Brake Thermal Efficiency (BTE) of AZ20 fuel at the retarded spill timing of 20° was raised by 3.38%, while the AZ100 fuel at 20° b TDC is decreased by 0.9%. However the emission of AZ100 fuel found to be lesser due to the presence of SiO2 nano additives. Thus the addition of SiO2 nano additives along with aquatic biomass Azolla Oil Methyl Ester reduced the emission without affecting the engine performance.","PeriodicalId":272133,"journal":{"name":"Science and Technology for Energy Transition","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114987599","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

Decentralized control of islanding/grid-connected hybrid DC/AC microgrid using interlinking converters 孤岛/并网混合直流/交流微电网的分散控制

Science and Technology for Energy Transition Pub Date : 1900-01-01 DOI: 10.2516/stet/2022019

Diress Tilahun Antalem, M. V, A. Bhattacharya

{"title":"Decentralized control of islanding/grid-connected hybrid DC/AC microgrid using interlinking converters","authors":"Diress Tilahun Antalem, M. V, A. Bhattacharya","doi":"10.2516/stet/2022019","DOIUrl":"https://doi.org/10.2516/stet/2022019","url":null,"abstract":"This paper presents decentralized control of an islanding/grid-connected DC/AC hybrid microgrid (μG) using battery energy storage system (BESS) and distributed energy resource (DER). In DC/AC μG unified with different DERs and BESS, the intermittent output nature of DERs due to fluctuating input characteristics and strong interaction of sources, loads, and primary grid, causes variations in frequency and bus voltage. To solve these issues, the paper proposes a decentralized control method which incorporates active/reactive power (P/Q) control, DC virtual droop control, voltage control, frequency droop control, current control, maximum power point tracking, and a phase-locked loop (PLL). The coordination and integration of various control parameters will ensure a smooth transition as well as the overall stability of the system. The BESS and DER’s interfacing converters are autonomously controlled in this control scheme without communication using the frequency droop and bus voltage control. Correspondingly, the control techniques comprehend different operating modes depending on the state of charge of BESS, distributed generation, and grid. During switching the two interlinking converters (IC), high-frequency harmonics are created, which are eventually mitigated by the inductor-capacitor-inductor (LCL) filters employed in the AC bus. Virtual droop control will ensure active damping of the harmonics in the LCL network. The maximum power transfer in interlinking converters (ICs) is improved using the proposed approach for input-source variations. Simulations were performed using MATLAB/Simulink and verified using the hardware in the loop (HIL) to prove the effectiveness of the control scheme proposed.","PeriodicalId":272133,"journal":{"name":"Science and Technology for Energy Transition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130118323","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: 1

Prediction of flexible pipe annulus composition by numerical modeling: identification of key parameters 柔性管环空组成的数值模拟预测:关键参数的识别

Science and Technology for Energy Transition Pub Date : 1900-01-01 DOI: 10.2516/stet/2022008

X. Lefebvre, N. Khvoenkova, Jean-Charles de Hemptinne, Léa Lefrançois, Béatrice Radenac, Stéphanie Pignoc-Chicheportiche, C. Plennevaux

{"title":"Prediction of flexible pipe annulus composition by numerical modeling: identification of key parameters","authors":"X. Lefebvre, N. Khvoenkova, Jean-Charles de Hemptinne, Léa Lefrançois, Béatrice Radenac, Stéphanie Pignoc-Chicheportiche, C. Plennevaux","doi":"10.2516/stet/2022008","DOIUrl":"https://doi.org/10.2516/stet/2022008","url":null,"abstract":"This article describes recent improvements made in the design process of offshore flexible pipes. These improvements consider the more precise complex geometry and architecture of the flexible pipes, while considering their corrosive environment (high pressure, high temperature, acid gases (CO2, H2S), sea water, etc.) and the relevant physics. MOLDITM, the design software that was developed 20 years ago to predict flexible pipes annulus environment, has been constantly upgraded to increase its representativeness: use of chemical potential or fugacity to better describe the mass transport, improvement of the thermodynamic module to better describe the interaction between chemical species and allow to model the purging through gas release valves. Recently, a major advance has been made allowing to cope with flooded annulus flexible pipes. When the annulus is flooded, the tortuosity produced by the presence of steel wires inside the annulus can take a major importance. Therefore, a new model, named 3DIFF, has been developed to describe the 3-dimensional characteristics of the annulus and its impact on fugacity profile across the structure. Depending on permeation properties of each layer, the result is that the presence of water can produce a fugacity gradient within the annulus. This heterogeneity must be considered during the design process to be fully representative of service conditions and allow to select flexible pipes materials with confidence. Experimental devices used to generate permeation database are under constant evolution to study even more complex mechanisms such as the diffusion process in a flooded tortuosity or the compression effects of polymeric material on their permeation properties.","PeriodicalId":272133,"journal":{"name":"Science and Technology for Energy Transition","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122122604","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: 1

Calculation of Joule-Thomson and isentropic expansion coefficients for two-phase mixtures 两相混合物焦耳-汤姆逊膨胀系数和等熵膨胀系数的计算

Science and Technology for Energy Transition Pub Date : 1900-01-01 DOI: 10.2516/stet/2023016

Ababakari Oumarou Ali, D. Broseta, D. Nichita

{"title":"Calculation of Joule-Thomson and isentropic expansion coefficients for two-phase mixtures","authors":"Ababakari Oumarou Ali, D. Broseta, D. Nichita","doi":"10.2516/stet/2023016","DOIUrl":"https://doi.org/10.2516/stet/2023016","url":null,"abstract":"Joule–Thomson (JT) and isentropic expansion coefficients describe the temperature change induced by a pressure variation under isenthalpic and isentropic conditions, respectively. They are commonly used to model a variety of processes in which either fluid compression or expansion is involved. While a lot of work has been devoted to inferring the JT coefficient from an equation of state when the fluid is a single phase, little attention has been paid to multiphase fluids, where phase equilibrium has to be taken into account; previous work has only addressed the construction on the JT inversion curve. In the present paper, we describe and implement an approach to calculate these two coefficients for multi-component fluid systems, including when they form two different phases, liquid, and vapor, in thermodynamic equilibrium. The only ingredients are an equation of state and expressions for the ideal part of the specific heats of the fluid components. We make use of cubic equations of state, but any thermodynamic model can be used in the proposed framework. Calculations conducted with typical geofluids, some of them containing CO2, show that these coefficients are discontinuous at phase boundaries (where enthalpy and entropy variations exhibit angular points), as expected with any thermodynamic quantity built from first-order derivatives of state functions, and cannot be simply inferred from the coefficients of the liquid and vapor phases.","PeriodicalId":272133,"journal":{"name":"Science and Technology for Energy Transition","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122749875","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

Processing on Curcuma longa waste oil-diesel blends for using as better alternative to diesel fuel 姜黄废油-柴油混合料的加工，以更好地替代柴油燃料

Science and Technology for Energy Transition Pub Date : 1900-01-01 DOI: 10.2516/stet/2022016

SanjeeviPrakash Karunanidhi, Arul Marcel Moshi Antony Joseph Decruz, R. Kasimani

{"title":"Processing on Curcuma longa waste oil-diesel blends for using as better alternative to diesel fuel","authors":"SanjeeviPrakash Karunanidhi, Arul Marcel Moshi Antony Joseph Decruz, R. Kasimani","doi":"10.2516/stet/2022016","DOIUrl":"https://doi.org/10.2516/stet/2022016","url":null,"abstract":"Technology advancements are growing in an exponential rate. Automobile sector is getting developed day by day where modern innovations are viewed with different features for the human society. Inspite of having various renewable energy sources, the demand for the fossil fuels still exists for meeting out the requirements of the growing application sides. In the present work, different blends of Curcuma longa waste neat oil samples have been prepared and mixed with diesel at different volume fractions. Nano metal oxide particles such as cerium oxide and Nano Egg Shell Powder (NESP) have been added with the prepared fuel samples in order to achieve better evaporation, atomization, better air-fuel mixing, considerable reduction in ignition delay and best flame sustainability nature. The prepared waste oil samples have been tested under four different loading conditions such as 30, 60, 90 and 120 N. The performance characteristics such as Brake Thermal Efficiency (BTE), Brake Specific Fuel Consumption (BSFC), Exhaust Gas Temperature (EGT), % of carbon monoxide emission, % of carbon dioxide emission, % of hydrocarbon emission and % of NOX emission have been measured for the tested blends. From the results, the optimal sample which exhibits improved desirable characteristics has been suggested. Grey Relational Analysis (GRA) has also been used as a multi objective optimization tool in order to find out the best composition of the Curcuma longa waste oil – diesel blend in order to achieve better desirable properties. ANOVA technique has been used to identify the most influencing input factor in achieving better characteristics for the oil blends.","PeriodicalId":272133,"journal":{"name":"Science and Technology for Energy Transition","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117316452","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