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A modified fractional‑order-based future search algorithm for performance enhancement of a PEMFC-based CCHP 改进的基于分数阶的未来搜索算法,用于增强基于pemfc的CCHP的性能
Pub Date : 2023-10-02 DOI: 10.1080/15567036.2023.2276385
Biao Lu, Navid Razmjooy
ABSTRACTLoad control and cost optimization are considered to be crucial in tri-generation or combined cooling, heating, and power (CCHP) systems. In this study, an inventive CCHP system employs an FC system as its first mover and includes a heat exchanger, a heat recovery, as well as an auxiliary boiler, an electric chiller, and an absorption chiller. The electrical grid is linked to this system. The idea here is to maximize the system’s performance from a financial perspective and to make the annual expenditure of the system minimum over a 20–year period that is considered as the cycle life-span. It is a multi-objective optimization problem which is optimized using a newly introduced metaheuristic optimization method and a Fractional-order future search optimizer. The findings of this study are used to divine an ideal configuration of the CCHP. Finally, to demonstrate the higher efficiency of the suggested method, a comparison should be conducted among the optimization results of the fractional-order-based future search algorithm, the results of Non-dominated Sorting Genetic Algorithm II (NSGA-II), and standard future search algorithms in previous studies. Based on the results presented, the proposed Fractional-order Future Search Algorithm (FOFSA) was able to optimize the performance of a PEMFC-based CCHP system more effectively than conventional methods. The system’s exergy efficiency was found to decrease from 52% at 793 mA/cm2 current density to 36% at 1000 mA/cm2 current density. However, with the application of FOFSA, the suggested optimal system had a higher exergy efficiency of 41.6% and a yearly cost of $2765, resulting in the maximum annual greenhouse gas (GHG) reduction of 4.48E6 g. Therefore, in summary, the proposed FOFSA yielded an optimized CCHP system configuration that had higher energy efficiency, lower annual cost, and reduced GHG emissions. These findings highlight the effectiveness of the FOFSA method in optimizing the performance of PEMFC-based CCHP systems.KEYWORDS: Combined heatingcoolingand power cycle; proton exchange membranefuel cell; economic performanceannual cost; fractional-order future search algorithm Nomenclature Symbol=ExplanationCCHP=Combined cooling, heating, and powerNSGA-II=Non-dominated Sorting Genetic Algorithm IIFOFSA=Fractional-order Future Search AlgorithmGHG=Greenhouse gasIMPO=Improved marine predators optimizerPROX=Preferential oxidationPCM=Phase change materialDAC=Desiccant air conditioningHX=Heat-exchangerMEA=Membrane-electrode assemblyNs=The connected cells’ quantityEN=The open-circuit Nernst relation (V)Vloss=The overall voltage loss (V)Vcon=Concentration loss (V)Vact=Activation loss (V)VΩ=Ohmic loss (V)EN=The stack output voltage (V)E0=The open-circuit voltage of the cell (V)F=The Faraday’s constant (C/mol)R=The universal gas constant (J/mol.K)T=The operating temperaturePO2=The partial pressure of O2 (Pa)PH2=The partial pressure of H2 (Pa)PH2Oc=The partial pressure of steam (Pa)Rhc=The vapor re
摘要负荷控制和成本优化被认为是三电或冷热电联产(CCHP)系统的关键。在本研究中,一种创新的热电联产系统采用FC系统作为原动机,包括热交换器、热回收、辅助锅炉、电冷冻机和吸收式冷冻机。电网与这个系统相连。这里的想法是从财务角度最大化系统的性能,并使系统的年度支出在20年的周期内达到最低,这被认为是循环寿命。它是一个多目标优化问题,采用新引入的元启发式优化方法和分数阶未来搜索优化器进行优化。本研究的结果用于预测CCHP的理想配置。最后,将基于分数阶的未来搜索算法的优化结果与非支配排序遗传算法II (non - dominant Sorting Genetic algorithm II, NSGA-II)的优化结果与前人研究的标准未来搜索算法的优化结果进行比较,以证明所提方法的更高效率。基于上述结果,所提出的分数阶未来搜索算法(FOFSA)能够比传统方法更有效地优化基于pemfc的CCHP系统的性能。系统的火用效率从793 mA/cm2电流密度时的52%下降到1000 mA/cm2电流密度时的36%。然而,应用FOFSA后,建议的最优系统的火用效率更高,达到41.6%,年成本为2765美元,最大年温室气体(GHG)减少4.48E6 g。综上所述,所提出的FOFSA产生了一个优化的CCHP系统配置,具有更高的能源效率,更低的年成本,并减少了温室气体排放。这些发现突出了FOFSA方法在优化基于pemfc的CCHP系统性能方面的有效性。关键词:热冷联产;质子交换膜燃料电池;经济效益年成本;分数阶未来搜索算法名称符号=解释cchp =联合冷却、加热、nsga - ii =非支配排序遗传算法IIFOFSA=分数阶未来搜索算法ghg =温室气体impo =改进的海洋捕食者optimizerPROX=优先氧化pcm =相变材料dac =干湿空调hx =热交换器mea =膜电极组装ns =连接细胞的数量EN=开路能量关系(V)Vloss=总电压损耗(V)Vcon=浓度损耗(V)Vact=激活损耗(V)VΩ=欧姆损耗(V)EN=堆叠输出电压(V)E0=电池开路电压(V)F=法拉第常数(C/mol)R=通用气体常数(J/mol. k)T=工作温度po2 = O2分压(Pa)PH2= H2分压(Pa)PH2Oc=蒸汽分压(Pa)Rhc=阴极中的蒸气相对湿度ha=阳极中的蒸气相对湿度i = FC的工作电流(A)A= FC的膜活性面积(m2)PC=阴极电极的入口分压(PC) Pa =阴极的入口分压阳极电极(Pa)Rc=连接电阻(kΩ)Rm=膜电阻(kΩ)ρm=膜电阻率(Ω.m)l=膜厚度(m)λ=可变变量lei =燃料电池堆电流(A)I0=极限电流(A)n=电荷传递系数bm=传质电压(V)ηex=系统的火用效率ypcchp =系统中产生的电能exe =提供的冷却火用exhw =提供的热水火用excchp =消耗的燃料火用sh2 = H2的化学计量;rh2 =燃料消耗的摩尔速率(mol。
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引用次数: 0
The impact of various catalysts on pyrolysis bio-oil characteristics and catalyst coking behavior of corn stover 各种催化剂对玉米秸秆热解生物油特性和催化剂结焦行为的影响
Pub Date : 2023-10-02 DOI: 10.1080/15567036.2023.2276902
Qi Zhang, Deli Zhang, Zhijing Sun, Fang Wang, Jiaqi Zhang, Rui Ma, Weiming Yi
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引用次数: 0
A critical review on the various techniques for the thermal performance improvement of solar air heaters 改进太阳能空气加热器热性能的各种技术综述
Pub Date : 2023-10-02 DOI: 10.1080/15567036.2023.2264228
S. A. Kedar, Ganesh Vijay More, D. S. Watvisave, H. M. Shinde
ABSTRACTSolar air heating system plays an important role in industries. However, in the solar air heating system efficiency considered as important parameters of the solar thermal systems, in particular, the solar air heaters (SAHs) system efficiency is quite low because of the inherent properties of air. The inherent properties include the formation of viscous sublayer, poor heat carrying capacity, etc. The active and passive approaches have been conceded to lessen this problem. The most promising approach is passive because of hassle-free operations. The best passive approaches have been placing ribs, baffles, fins, winglets, etc., on the heat-absorbing surface of SAHs to break the viscous sublayer and promote turbulence. In the present study, various ribs and baffles profiles have been summarized so that they can be used for future research. Along with that, this paper mainly focuses on the need for solar air heating for industrial applications. The performance of SAHs in terms of thermo-hydraulic performance (THP) and thermal and effective efficiencies has been studied and compared for ribs and baffles. Use of fins on the absorber plate and different surface geometries of the absorber plate enhanced the rate of heat transfer during the sunshine hours and use of phase change material for the supply of heat energy during off-sunshine hours. As a result, maximum thermal efficiency of SAHs having ribs, baffles and fins has been found to be 81.9% but the effective efficiency is 28.3% because of large friction factor. Solar air heaters mainly gain popularity in the wide range of industrial applications.KEYWORDS: Bafflesribscorrelationsthermal and effective efficiencythermohydraulic performance Nomenclatures Ap=Area of absorber plate (m2)Cp=Specific heat of air at bulk mean temperature. J/kg KDh=Hydraulic diameter (m)e=Rib/baffle height (m)fs=Friction factor of smooth surfacefr=Friction factor of roughened surfaceH=Duct height (m)h=Heat transfer coefficient (W/m2KI=Heat insolation (W/m2)k=Thermal conductivity of air (W/mK)m=Mass flow rate of air (Kg/s)L=Duct length (m)Nus=Nusselt number of smooth surfaceNur=Nusselt number of roughened surfaceP=Pitch of roughness (m)Pr=Prandtl numberHrrp=Relative rib pitchHrbp=Relative baffle pitch(△p)=Pressure drop (Pascal)Re=Reynolds numberTa=Ambient temperature (k)Tp=Plate temperature (k)Ti=Inlet air temperature (k)To=Outlet air temperature (k)Tsa=Temperature of fluid inside duct (k)Tsun=Sun Temperature (k)W=Duct width (m)Greek Symbols=ρ=Density (kg/m3)μ=Dynamic Viscosity (N.s/m2)α=Angle of attack (0)εp=Emissivity of absorber plateεg=Emissivity of glass sheetτaab=Product of transmittance–absorptanceDisclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsS. A. KedarS. A. Kedar is an Assistant Professor at Mechanical Engineering from MKSSS’s Cummins College of Engineering for Women, Karvenagar Pune. He completed a Master’s degree in Energy Studie
摘要太阳能空气加热系统在工业中起着重要的作用。然而,在作为太阳能热系统重要参数的太阳能空气加热系统中,由于空气的固有特性,太阳能空气加热器(SAHs)系统效率很低。其固有特性包括形成粘性亚层、热承载能力差等。为了减轻这一问题,已经承认了主动和被动的方法。最有希望的方法是被动的,因为它的操作没有麻烦。最好的被动方法是在SAHs的吸热表面放置肋、挡板、鳍、小翼等,以打破粘性亚层,促进湍流。在本研究中,对各种肋板和挡板的外形进行了总结,以便于今后的研究。与此同时,本文主要关注工业应用对太阳能空气加热的需求。对肋板和挡板的热水力性能、热效率和有效效率进行了研究和比较。在吸收板上使用翅片和吸收板的不同表面几何形状提高了日照时的传热率,并在非日照时使用相变材料提供热能。结果表明,带有肋、挡板和翅片的SAHs的最大热效率为81.9%,但由于摩擦系数大,其有效效率为28.3%。太阳能空气加热器主要在广泛的工业应用中得到普及。关键词:折流板;关联度;热效率和有效效率;热工性能;命名法Ap=吸收板面积(m2);J/kg KDh=水力直径(m)e=肋/挡板高度(m)fs=光滑表面摩擦系数efr=粗糙表面摩擦系数h=风道高度(m)h=换热系数(W/m2KI=热辐照(W/m2)k=空气导热系数(W/mK)m=空气质量流量(kg /s)L=风道长度(m)Nus=光滑表面努瑟尔数enur =粗糙表面努瑟尔数ep =粗糙度节距(m)Pr=普朗特数hrrp =相对肋节距hrbp =相对挡板节距(△p)=压降(帕罗)Re=雷诺数numberTa=环境温度(k)Tp=板温(k)Ti=进风温度(k)To=出风温度(k)Tsa=风道内流体温度(k)Tsun=太阳温度(k)W=风道宽度(m)希腊符号=ρ=密度(kg/m3)μ=动态粘度(N.s/m2)α=迎角(0)εp=吸收板发射率εg=玻璃板发射率τaab=透射-吸收积披露声明作者未报告潜在的利益冲突。附加信息:关于贡献者的说明。答:棚。A. Kedar是位于浦那Karvenagar的MKSSS康明斯女子工程学院机械工程助理教授。他在浦那s.p. Pune University获得能源研究硕士学位。他在印度科内鲁·拉克什迈亚教育基金会(被认为是印度大学)完成了机械工程博士学位。主要研究领域为太阳能热能、可再生能源、热能工程。他有14年的教学经验和1年的工业经验。Ganesh Vijay More目前在PVG工程技术学院和G. K. Pate (Wani)管理学院(印度浦那)机械工程系担任助理教授。他拥有印度Vaddeswaram大学Koneru Lakshmaiah教育基金会的机械工程博士学位,以及印度巴拉马蒂的Vidya Pratishthan的Kamalnayan Bajaj工程与技术研究所的硕士学位。他有6年的研究和学术经验。美国WatvisaveD。S. Watvisave目前在普纳康明斯女子工程学院机械工程系担任副教授。他拥有印度理工学院波梅分校的热学和流体博士学位以及浦那COEP理工大学的硕士学位。他拥有28年的工业、研究和学术经验。m . ShindeH。他于2005年获得浦那理工大学COEP机械工程学位。随后在2013年获得了机械工程(汽车工程)硕士学位。随后于2022年在普纳大学获得机械工程博士学位。他目前受聘为浦那大学康明斯女子工程学院机械工程系助理教授。他的研究兴趣集中在汽车技术和能源方面。
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引用次数: 0
Numerical study of the flow and heat transfer characteristics of microencapsulated phase change slurry 微囊化相变浆料流动与传热特性的数值研究
Pub Date : 2023-10-02 DOI: 10.1080/15567036.2023.2263401
Enpei Wang, Lei Li
ABSTRACTMicroencapsulated phase change material (MPC) slurry is created by combining phase change material with a carrier fluid that has superior heat transfer properties compared to ordinary water. MPC slurry is conventionally investigated as heat storage and working fluid in a variety of applications to reduce power consumption. This study numerically investigates the impact of several critical parameters on the heat transfer coefficient (HTC) of MPC slurry in a circular pipe, using Eulerian–Eulerian model. The right triangle curve, one of equivalent specific heat model (ESHM), was applied to evaluate the influence of different critical variable values specified as Tin = 305 K, qwall = −125~−200 kW/m2, αv = 0~15%, Re = 6290~13838, and D = 10~25 mm. The results show that increasing the velocity develops local HTC and reduce the rate of heat transformation. Phase change processing takes roughly twice as long at 1.1 m/s as at 0.5 m/s. Additionally, the results demonstrate that a high concentration of MPC slurry is advantageous for energy storage, as the temperature of MPC slurry is maintained over a considerable distance in cooling conditions. At a velocity of 0.8 m/s, the outlet bulk temperature of MPC slurry at various concentrations is 2–6 K higher than that of water. Furthermore, the evaluation reveals that the HTC was largely determined by pipe size, which was the primary factor. The findings of this study are useful for optimizing energy systems that require thermal energy management.KEYWORDS: Microencapsulated phase change materialEulerian–Eulerian modelflow characteristicsequivalent specific heat modelCFD Nomenclatures A=interfacial area, m2cp=specific heat capacity, KJ/kg KD=diameter of the pipe, mmh=heat transfer coefficient, kW/m2 KK=thermal conductivity, W/m KLH=latent heat, J/kgP=pressure, PaQ=heat flux, kW/m2Re=Reynolds numberT=temperature, Kv=velocity, m/sZ=length along the pipe, mSubscripts = b=bulk MPC slurryl=liquid phasem=massp=MPC particles=solid phasesl=phases interactionw=carrier fluid (water)Greek letters=α=volume fractionμ=viscosity, N/m2 sρ=density, kg/m3Disclosure statementNo potential conflict of interest was reported by the author(s).
摘要微胶囊化相变材料(MPC)浆料是将相变材料与一种与普通水相比具有优越传热性能的载体流体相结合而制成的。MPC浆液通常作为储热液和工作流体在各种应用中进行研究,以降低功耗。本文采用欧拉-欧拉模型,数值研究了几个关键参数对圆管内MPC浆体换热系数的影响。采用等效比热模型(ESHM)中的直角三角形曲线,评价了Tin = 305 K、qwall = - 125~ - 200 kW/m2、αv = 0~15%、Re = 6290~13838、D = 10~25 mm等不同临界变量的影响。结果表明,增大速度可促进局部热循环,降低热转化速率。在1.1 m/s时,相变处理的时间大约是0.5 m/s时的两倍。此外,研究结果表明,高浓度的MPC浆体有利于能量储存,因为MPC浆体的温度在冷却条件下保持了相当长的距离。在速度为0.8 m/s时,不同浓度的MPC料浆出口体积温度比水高2 ~ 6 K。此外,评估表明,HTC在很大程度上取决于管道尺寸,这是主要因素。本研究的结果对于优化需要热能管理的能源系统是有用的。关键词:cfd命名法A=界面面积,m2cp=比热容,KJ/kg KD=管径,mmh=换热系数,kW/m2 KK=导热系数,W/m KLH=潜热,J/kgP=压力,PaQ=热流密度,kW/m2Re=雷诺数bert =温度,Kv=速度,m/sZ=沿管长度,m下标=b =体积MPC浆液=液相=质量p=MPC颗粒=固相=相相互作用w=载液(水)希腊字母=α=体积分数μ=粘度,N/m2 sp=密度,kg/m3披露声明作者未报告潜在的利益冲突。
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引用次数: 0
Analysis of carbon emissions for district heating using biomass straw instead of coal: A case study 生物质秸秆代替煤炭区域供热的碳排放分析:一个案例研究
Pub Date : 2023-10-02 DOI: 10.1080/15567036.2023.2267495
Cun Wei, Zhigang Zhou, Ming Ni, Rixin Wang, Mingyang Cong, Dayi Yang, Jing Liu
ABSTRACTDecarbonizing district heating requires utilization of low-emitting energy sources. However, earlier studies did not fully consider the district heating potential and CO2 reduction impacts of limited biomass sources. This study presents a new model that examines the potential for utilizing biomass straw sources as fuel for biomass boilers and thermal power plants, with a case study conducted in Heilongjiang Province, China. Results from the model show that the available biomass straw supply increases from 83,799 kilotons to approximately 127,939 kilotons before declining to around 90,000 kilotons. By employing biomass straw as fuel for district heating, an area between 99.4 and 469.8 million m2 can be served by biomass boilers and thermal power plants, leading to CO2 emission reductions ranging from 15.21 to 30.41 million tons. This reduction represents 19–38% compared to the initial CO2 emissions, indicating potential positive carbon reduction benefits. The developed model can be useful for policy makers and industry stakeholders seeking efficient strategies for decarbonizing district heating.KEYWORDS: CO2 emissionsbiomass energycrop strawdistrict heatingHeilongjiang AcknowledgementsThis work is supported financially by the National Natural Science Foundation of China (No. 62276080).Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Data availability statementThe data supporting the findings of this study are available within the article.Additional informationFundingThe work was supported by the National Natural Science Foundation of China [No. 62276080].Notes on contributorsCun WeiCun Wei, Certified Energy Manager by the American Association of Energy Engineers, currently pursue his PhD degree in Energy Engineering field at Harbin Institute of Technology. He obtained his master degree from Shanghai Maritime University. His research interests are development and application of low-carbon energy.Zhigang ZhouZhigang Zhou, Professor/doctoral supervisor, currently serves as director of the Department of Thermal Energy Engineering, School of Architecture, Harbin Institute of Technology. His main research directions are urban low-carbon smart heating technology, digital platform of multi-energy complementary supply system, etc.Ming NiMing Ni is currently working as associate professor in Qingdao Technical College. He obtained his bachelor degree from Qufu Normal University and his graduate degree from Central China Normal University. His research interests are linguistics and management. He has teaching and research experience of 30 years.Rixin WangRixin Wang is currently pursuing her PhD degree in Civil Engineering field at Harbin Institute of technology. Her research interests are smart heating and intelligent control technology.Mingyang CongMingyang Cong is currently pursuing her PhD degree in Civil Engi
【摘要】区域供热脱碳需要低排放能源的利用。然而,早期的研究并没有充分考虑有限生物质资源的区域供热潜力和二氧化碳减排影响。本研究提出了一个新的模型,该模型考察了利用生物质秸秆作为生物质锅炉和火力发电厂燃料的潜力,并以中国黑龙江省为例进行了研究。模型结果显示,可利用的生物质秸秆供应量从83799千吨增加到约127939千吨,然后下降到约90000千吨。采用生物质秸秆作为燃料进行区域供热,生物质锅炉和火力发电厂可服务面积9940万~ 4698万m2,可减少CO2排放1521万~ 3041万吨。与最初的二氧化碳排放量相比,这一排放量减少了19-38%,表明潜在的积极碳减排效益。所开发的模型可以为政策制定者和行业利益相关者寻求有效的区域供热脱碳战略提供帮助。关键词:二氧化碳排放;生物质能源;农作物秸秆区域供热;披露声明作者声明,他们没有已知的竞争经济利益或个人关系,可能会影响本文所报道的工作。数据可用性声明支持本研究结果的数据可在文章中获得。本研究由国家自然科学基金资助[No. 1];62276080)。投稿人注存伟,美国能源工程师协会认证能源经理,目前在哈尔滨工业大学攻读能源工程博士学位。毕业于上海海事大学,获硕士学位。主要研究方向为低碳能源的开发与应用。周志刚,教授,博士生导师,现任哈尔滨工业大学建筑学院热能工程系主任。主要研究方向为城市低碳智能供暖技术、多能互补供电系统数字化平台等。倪明宁现为青岛职业技术学院副教授。他在曲阜师范大学获得学士学位,在华中师范大学获得研究生学位。主要研究方向为语言学和管理学。他有30年的教学和科研经验。王日新目前在哈尔滨工业大学攻读土木工程专业博士学位。主要研究方向为智能供暖与智能控制技术。丛明阳目前就读于哈尔滨工业大学土木工程专业,攻读博士学位。她在卡内基梅隆大学获得硕士学位。主要研究方向为基于占用的建筑控制和智能能源系统。杨大益,哈尔滨工业大学讲师,主要研究方向为软件工程、服务计算、智能供暖、清洁能源技术,主导智能供暖服务平台研发。刘静,哈尔滨工业大学教授,博士生导师。他毕业于日本东北大学,获博士学位。主要研究方向有:建筑内外不同尺度热环境测量与模拟评价、建筑节能相关设备与技术开发、城市区域能源与气候规划等。
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引用次数: 0
Comparison of some species in genus Brassica cultivated on clay loamy soils under semi-arid agroecosystem for suitability to biodiesel production 半干旱农业生态系统下粘质壤土上几种芸苔属植物对生物柴油适宜性的比较
Pub Date : 2023-10-02 DOI: 10.1080/15567036.2023.2266423
Fatma Kayacetin
ABSTRACTInstead of using canola purelines, the use of other species in genus Brassica will be a novel concept to obtain sustainable biodiesel production. This study compares the crude oil percentage, fatty acid composition, and biodiesel characteristics of spring and autumn sown Brassica juncea, B. rapa ssp. oleifera, Sinapis alba, B. nigra purelines appropriateness for biodiesel production. The results indicated that crude oil percentage and fatty acid composition are significantly affected by an interaction between years × genotypes. The crude oil percentage in all species in genus Brassica changed between 14.31 and 30.46% in spring crops and 22.29 and 36.88% in autumn crops. Erucic acid (C22:1; 10.2–42.8%), oleic acid (C18:1; 14.2–34.9%), and linoleic acid (C18:2; 6.8–25.1%) were identified as major fatty acids in all genotypes. Technical features of biodiesel produced by transesterification of species in genus Brassica oil such as acid value (0.18–0.50 mg KOH g−1), water content (110–480 mg kg−1), iodine value (97.30–119.89 g iodine 100 g−1), cold filter plugging point (−5–5°C), flash point (170–205°Ϲ), and glyceride (0.003–0.46% mm−1). These values indicated that regardless of the time of sowing, these lines are appropriate for biodiesel production in accordance with the TS EN 14,214 standards. Br2 (B. rapa ssp. oleifera) autumn and Bj3 (B. juncea) spring crops are preferable compared to other genotypes to achieve higher yield and quality. Therefore, these genotypes are recommended for further evaluation and sustainable biodiesel production.KEYWORDS: Biofuel technical featureBrassica junceaB. nigraB. rapa ssp. oleiferacrude oil percentagefatty acidSinapis alba AcknowledgementsThe author wishes to thank the DB Agricultural Energy to which determines crude oil percentage, fatty acid component, and biodiesel technical properties in its laboratory, to the entire project team for their contribution, and to Prof. Dr. Khalid Mahmood Khawar (Department of Field Crops, Ankara University, Turkey) for support in the preparation of the article. The author would also like to thank the Scientific and Technological Research Council of Turkey (Grant No. 1505-5190038) for its financial support as a project of the Central Field Crops Research Institute, Ankara, Turkey and DB Agricultural Energy Industry and Trade Limited, Izmir, Turkey. This article covers the works included in the business plan’s Ankara location of DB Agricultural Energy which is the Customers Company of the project supported by TUBITAK.Disclosure statementNo potential conflict of interest was reported by the author.Data availability statementThe data are available on request.Additional informationFundingThis research was funded by the Scientific and Technological Research Council of Turkey, grant number 5190038.Notes on contributorsFatma KayacetinFatma Kayacetin Ph.D. is an Associate Professor in Medicinal and Aromatic Plants Program of Kalecik Vocational School of Ankara University, Turkey
摘要利用芸苔属的其他物种代替油菜纯氨酸将是获得可持续生物柴油生产的新概念。本研究比较了春播和秋播芥菜(Brassica juncea, B. rapa ssp.)的原油含量、脂肪酸组成和生物柴油特性。油葵、白sinapi alba、黑曲霉纯系适于生产生物柴油。结果表明,不同基因型间的交互作用对原油百分比和脂肪酸组成有显著影响。油菜属各种属的原油含量在春季作物14.31 ~ 30.46%和秋季作物22.29 ~ 36.88%之间变化。芥酸(C22:1;10.2-42.8%)、油酸(C18:1;14.2-34.9%),亚油酸(C18:2;6.8-25.1%)是所有基因型的主要脂肪酸。通过交换反应制备的生物柴油的技术特征,如酸值(0.18-0.50 mg KOH g−1),水含量(110-480 mg kg−1),碘值(97.30-119.89 g碘100 g−1),冷过滤器堵塞点(- 5-5°C),闪点(170-205°Ϲ),甘油(0.003-0.46% mm−1)。这些值表明,无论播种时间如何,这些品系都适合按照TS EN 14,214标准生产生物柴油。2 .答案:b。与其他基因型相比,油菜籽(oleifera)秋季作物和Bj3 (B. juncea)春季作物可获得更高的产量和质量。因此,这些基因型被推荐用于进一步的评估和可持续的生物柴油生产。关键词:生物燃料;技术特征;芥菜;nigraB。拉伯ssp。作者要感谢在实验室中测定原油百分比、脂肪酸成分和生物柴油技术特性的DB农业能源公司,感谢整个项目团队的贡献,并感谢Khalid Mahmood Khawar教授博士(土耳其安卡拉大学大田作物系)在本文编写过程中的支持。作者还要感谢土耳其科学技术研究理事会(批准号1505-5190038)作为土耳其安卡拉中央大田作物研究所和土耳其伊兹密尔DB农业能源工业和贸易有限公司项目的财政支持。本文介绍了DB农业能源公司在安卡拉的商业计划中所包含的工作,该公司是TUBITAK支持的项目的客户公司。披露声明作者未报告潜在的利益冲突。数据可用性声明数据可根据要求提供。本研究由土耳其科学技术研究委员会资助,批准号5190038。fatima Kayacetin博士是土耳其安卡拉大学Kalecik职业学校药用和芳香植物项目的副教授。她的工作领域是药用芳香和油籽植物农学和育种。
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引用次数: 0
Simulation study of drilling fluid cooling in long horizontal wells based on phase change heat absorption 基于相变吸热的长水平井钻井液冷却模拟研究
Pub Date : 2023-10-02 DOI: 10.1080/15567036.2023.2268585
Jie Zhang, Jiaohao Xie, Xin Li, Runze Li, Wenqing Ye, Gezhen Mao
ABSTRACTThe shale gas resources found in deep formations are abundant and represent a crucial area for current and future shale gas development. However, as shale gas exploration and development intensify in China, an increasing number of high-temperature formations are being encountered during drilling, presenting significant challenges to drilling engineering and severely constraining the development of deep shale gas exploration. In this study, the stability of PCM (phase change material) combined with drilling fluid as a coolant was discussed, and the influence of PCM on wellbore temperature field in drilling fluid was considered. A calculation model of temperature field of drilling fluid containing PCM was established, the cooling characteristics of PCM under the influence of different parameters were simulated, and the cooling effect of PCM integrated with drilling fluid on ultra-deep and high-temperature Wells was analyzed. The investigated PCM has a phase change temperature range of 120 ~ 130°C and a latent heat of 264.15 ~ 265.53 kJ/kg. Our results showed that the cooling impact of PCM exhibits an upward trend as the quantity of PCM utilized increases. Assuming the drilling temperature limit is 135°C, after adding 5% PCM to the drilling fluid, the drilling length of the horizontal section increased by approximately 500 m. With 15% PCM added, the horizontal section could be extended by about 1000 m. We conducted a simulation analysis on a well in southern Sichuan, and found that adding 12% PCM had the best cooling effect, reducing the bottom hole temperature by 12.3°C and extending the horizontal section by 700 m. Compared with conventional drilling fluid cooling methods, incorporating PCM as cooling agents within the drilling fluids provided better cooling effects. It effectively addressed the problem of excessive bottom-hole temperatures in deep wells, extended the drilling length of horizontal sections, and prolonged the service life of downhole instruments. Our research lays the groundwork for the future investigation of cooling techniques for high-temperature deep well drilling fluids.KEYWORDS: Drilling fluidtemperature distributionPCM (phase change material)long horizontal wellshigh temperature well cooling Nomenclature c=specific heat capacity, J/(kg·℃)t=time, sz=well depth, mh=Convective heat transfer coefficient, W/(m2·℃)L=latent heat of phase transition, kJ/kgq=volume flow rate of drilling fluid, m3/sQm=internal heat source, W/m3Qa=heat source inside the drill string, W/m3r=radius, mT=temperature,°CTm=phase transition temperature,°CΔT=Phase transition temperature interval,°CGreek Symbols=λ=thermal conductivity, W/(m·℃)ρ=density, kg/m3Subscripts=0.1.2.3.4.i=regions of fluid in drill string, drill string wall, fluid in annulus, borehole wall and formation, respectivelyi=i th layer in the radial directionj=j th layer in the axial directiong=before phase transformation f=at phase transitiony=after phase transformationz=at z position
摘要深层页岩气资源丰富,是当前和未来页岩气开发的重要领域。然而,随着中国页岩气勘探开发力度的加大,钻井过程中遇到的高温地层越来越多,给钻井工程带来了重大挑战,严重制约了深层页岩气勘探的发展。本研究讨论了相变材料(PCM)与钻井液结合作为冷却剂的稳定性,并考虑了PCM对钻井液井筒温度场的影响。建立了含PCM钻井液温度场计算模型,模拟了不同参数影响下PCM的冷却特性,分析了PCM与钻井液结合对超深井和高温井的冷却效果。相变温度范围为120 ~ 130℃,潜热范围为264.15 ~ 265.53 kJ/kg。结果表明,随着PCM用量的增加,PCM的冷却影响呈上升趋势。假设钻井温度极限为135℃,在钻井液中加入5%的PCM后,水平段的钻井长度增加了约500 m。添加15%的PCM后,水平段可延长约1000米。通过对川南某井的模拟分析,发现添加12%的PCM冷却效果最好,可使井底温度降低12.3℃,水平段延长700 m。与传统的钻井液冷却方法相比,在钻井液中加入PCM作为冷却剂具有更好的冷却效果。有效解决了深井井底温度过高的问题,延长了水平井段的钻进长度,延长了井下仪器的使用寿命。本研究为高温深井钻井液冷却技术的进一步研究奠定了基础。关键词:pcm(相变材料)长水平井高温井冷却术语c=比热容,J/(kg·℃)t=时间,sz=井深,mh=对流换热系数,W/(m2·℃)L=相变潜热,kJ/kgq=钻井液体积流速,m3/sQm=内部热源,W/m3Qa=钻柱内部热源,W/m3r=半径mT=温度,°CTm=相变温度,°CΔT=相变温度区间,°c希腊符号=λ=导热系数,W/(m·℃)ρ=密度,kg/m3下标=0.1.2.3.4。i=钻柱、钻柱壁、环空、井壁和地层中的流体区域,分别为i=径向层j=轴向层j=相变前f=相变后z=在z位置披露声明作者声明,他们没有已知的可能影响本文工作的相互竞争的经济利益或个人关系。作者简介张杰,现任西南石油大学石油与天然气系教授。2005年毕业于西南石油学院油气井工程专业,获博士学位。张杰的研究兴趣包括多相流建模、传热传质、油气钻井和制冷。谢焦浩,西南石油大学石油与天然气系硕士研究生。他的主要研究方向是钻井多相流、传热传质和高温钻井。李昕,现任西南石油大学石油工程学院博士研究生。他于2020年获得中国西南石油大学石油工程硕士学位。他在石油工程研究方面非常活跃,并发表了许多石油工程方面的研究论文。Xin的研究兴趣包括井筒流体力学和压力控制、井筒传热和温度控制、井筒损伤力学和废弃井改造。
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引用次数: 0
Design and optimal energy management of a stand-alone PV/WT/Diesel/battery system with EV charging facility for Thar desert camp: a case study Thar沙漠营地电动汽车充电设施的独立光伏/WT/柴油/电池系统的设计与优化能源管理:案例研究
Pub Date : 2023-10-02 DOI: 10.1080/15567036.2023.2268571
Surajit Sannigrahi
ABSTRACTDue to different financial restrictions, extending the existing power grid to remote locations like desert camps is not practically possible, forcing the camp owner to utilize expensive and ecologically hazardous diesel generators (DiG). In this regard, renewable sources based hybrid microgrid could be a viable approach toward reliable and sustainable electrification of these desert camps. However, optimum designing and proper energy management of such a system can be a challenging task. In these terms, this study presents a novel model based on the multi-objective PSO (MOPSO) algorithm for optimal design and energy management of a hybrid microgrid employing solar photovoltaic (PV) and wind turbine (WT), battery, and DiG for electrification of Thar desert camp in Jaisalmer, India. To address techno-eco-environmental aspects, objectives such as Dump Energy (DE), Installation and Operation Cost (IOC), and Reduction of Pollutant Emission (RPE) are considered. The optimal configuration of PV, WT, battery, and DiG are determined based on the maximization of RPE and minimization of both DE and IOC. The proposed model is formulated taking into account the seasonal load variation of a typical camp and the stochastic behavior of renewable energy sources. Moreover, electric vehicles (EVs) charging facility for the tourists staying in these camps is also included while modeling the microgrid system. Furthermore, three distinct system configurations are carefully analyzed over a 10-year period based on technical, environmental and economic indicators. The optimum configuration obtained is the hybrid PV/WT/DiG/battery system with 62 kW PV, 76 kW WT, 350 kWh battery and a 117 kW DiG. According to simulation findings, this system has an operational cost of 323.7 × 104 $ and a pollutant emission of 2034.3 tons, which is 33.67% and 63.32% less than that of the DiG-only configuration, respectively. Moreover, as compared to PV/WT/DiG system, PV/WT/DiG/battery system can reduce dump energy by 81.40%, highlighting the necessity of battery for fully utilizing renewable energy. Overall, this analysis suggests that the utilization of renewable energy sources along with the battery is the optimal planning solution for the camp owner to maximize their potential benefits. Moreover, the proposed technique can be effectively used to optimally design hybrid renewable energy system for other remote locations.KEYWORDS: Hybrid microgrid systemelectric vehiclesrenewable energy sourcesbattery storage systemdesert campmulti-phase planning Nomenclature Nmod=Number of PV modulesFF=Fill factorV; I=Voltage/Current of PV module.VMPP; IMPP=Voltage/Current at maximum power pointV0; IS=Open circuit voltage/Short circuit currentKI; KV=Temperature coefficient of current/voltageTC=PV cell TemperatureT; T0=Ambient/Nominal operating temparaturePtPV=Power output of PV at tth timePsssi=PV power at sith state of solar irradiancePrated=Rated power of WTvws=Wind Speedvci; vr; vco=Cut-in/rate
摘要由于不同的财政限制,将现有电网扩展到沙漠营地等偏远地区实际上是不可能的,迫使营地所有者使用昂贵且对生态有害的柴油发电机(DiG)。在这方面,基于可再生能源的混合微电网可能是实现这些沙漠营地可靠和可持续电气化的可行方法。然而,这种系统的优化设计和适当的能量管理可能是一项具有挑战性的任务。在这些方面,本研究提出了一个基于多目标粒子群(MOPSO)算法的新模型,用于印度Jaisalmer的Thar沙漠营地的混合微电网的优化设计和能量管理,该混合微电网采用太阳能光伏(PV)和风力涡轮机(WT),电池和DiG,用于电气化。为了解决技术-生态-环境方面的问题,考虑了诸如倾倒能源(DE)、安装和运行成本(IOC)和减少污染物排放(RPE)等目标。PV、WT、battery和DiG的最佳配置是基于RPE的最大化和DE和IOC的最小化来确定的。该模型考虑了典型营地的季节性负荷变化和可再生能源的随机特性。此外,在对微电网系统进行建模时,还包括了为在这些营地住宿的游客提供的电动汽车充电设施。此外,根据技术、环境和经济指标,在10年期间仔细分析了三种不同的系统配置。得到的最优配置是光伏/WT/DiG/电池混合系统,该系统包含62千瓦的光伏、76千瓦的WT、350千瓦时的电池和117千瓦的DiG。仿真结果表明,该系统运行成本为323.7 × 104美元,污染物排放量为2034.3吨,分别比纯dig配置减少33.67%和63.32%。此外,与PV/WT/DiG系统相比,PV/WT/DiG/电池系统可以减少81.40%的转储能量,突出了电池对充分利用可再生能源的必要性。总的来说,这一分析表明,利用可再生能源和电池是营地所有者最大化其潜在利益的最佳规划解决方案。此外,该技术可有效地用于其他偏远地区的混合可再生能源系统的优化设计。关键词:混合微电网系统电动汽车可再生能源电池储能系统沙漠营地多阶段规划术语Nmod=光伏组件数ff =填充因子v;I= PV组件电压/电流。vmpp;IMPP=最大功率点电压/电流;IS=开路电压/短路电流;KV=电流/电压温度系数etc =光伏电池温度t;T0=环境温度/标称工作温度reptpv =第h次光伏发电输出功率psssi =第6次太阳辐照状态下的光伏发电功率prated =额定功率WTvws=风速vci;虚拟现实;vco =切入/评价/抠图速度Ωp;Ωs=规划阶段和季节集合,s, pbattery =第一时间电池的SOC∂=电池的自放电率OPt,s,pPV;OPt,s,pWT;OPt,s,pDiG= PV/WT/DiG在第一时间的输出功率pt,s,负载;Pt,s,pEV=Camp/EV在第th时刻的充电负荷;η battery,ch;η battery,dch=电池的充放电效率;η battery, inv=逆变器efficiencyΔt=时间段fuelt,s,pDiG=第th时刻的燃料成本;appdig = DiGSOCt的容量,s,pEV_n=第n辆电动车在第th时刻的电池荷电状态;Pt,s,pdch,EV_n=第n辆电动车在第th时刻的充放电功率;incostpv;IncostWT;IncostDiG= PV/WT/DiG的安装成本($/kW) incostbat =电池的安装成本($/kWh)OcostPV;OcostWT; ocostbat = PV/WT/电池的运行成本($/kWh)Copfuel=燃料成本($/L)PEDiG;PEhybrid= DiG/hybrid系统的污染物排放;ECO=污染物排放量(kg/kWh)Emaxbatt=电池的最小/最大SOC极限dod =放电深度ecbatt =电池容量yet,s,pbatt,ch;Et,s,pbatt,dch=电池在第一次充电/放电能量apmindig;CapmaxDiG= DiG的最小/最大功率#下标s表示第5个季节,p表示第5个规划阶段=披露声明作者未报告潜在的利益冲突。其他信息关于贡献者的说明surajit Sannigrahi获得了B.Tech。2012年毕业于印度加尔各答梅格纳德萨哈理工学院,并获得理工硕士学位。分别于2016年和2020年获得印度杜尔加布尔国立理工学院的博士学位。有3年以上的教学经验。他目前在印度理工学院瓦朗加尔分校电气工程系担任客座教授(助理教授)。主要研究方向为主动配电系统规划、混合可再生能源系统设计、微电网和智能电网。
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引用次数: 0
Comparative analysis of waste tire pyrolysis oil and gasoline as low reactivity fuel in RCCI engine 废轮胎热解油与汽油作为RCCI发动机低反应性燃料的对比分析
Pub Date : 2023-10-02 DOI: 10.1080/15567036.2023.2271422
Müjdat Fırat, Mutlu Okcu, Okan Çelik, Şehmus Altun, Yasin Varol
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引用次数: 0
An innovative mechanism of creating H1 and H3 pore types in AlSiO 4 and its catalytic application to convert waste plastic into aviation fuel alsio4中生成H1和H3孔隙类型的创新机理及其在废塑料转化为航空燃料中的催化应用
Pub Date : 2023-10-02 DOI: 10.1080/15567036.2023.2275711
Senthurselvi S, Chellapandian Kannan
ABSTRACTFeAlSiO4 -H3 and ZnAlSiO4-H1 are synthesized through the facile method without an autoclave. Tetraethylenepentamine (TEPA) is a structure-directing agent. FT-IR, XRD, BET, TPD, TGA, and TEM confirmed the framework, crystallinity, porosity, acidity, thermal stability (above 600°C), and surface morphology respectively. BET analysis revealed that two distinct pore widths (FeAlSiO4-H3: 13.79 nm, ZnAlSiO4-H1: 11.65 nm) are based on the metal ion substitution The acidity (FeAlSiO4 -H3:6.576 and ZnAlSiO4-H1:13.836 cm3/g STP). In ZnAlSiO4 – H1, 7 template molecules form a linear complex with 6 Zn2+ions which is oriented vertically to create cylindrical pores. In FeAlSiO4-H3, 8 template molecules are formed a linear complex with 7 Fe2+ which is positioned in a cross-sectional way to produce slit pores. The catalytic cracking of polypropylene has been carried out over FeAlSiO4 and ZnAlSiO4 and observed that the conversion is 100%. H3 type pore has produced higher selectivity of jet fuel (90%) than the H1 type pore (86%) at 0.5 g catalyst dosage. In addition to that, H3 type has produced diesel (3.8%) and H1 type has produced petrol (10.1%) as a minor product. The synthesized aviation fuels are equivalent to JET A-1 fuel and are characterized by FT-IR, HPLC, and GC-MS.KEYWORDS: Waste plasticH3 and H1 pore typemetal ion-TEPA orientationpore mechanismhydrocarbon Disclosure statementNo potential conflict of interest was reported by the author(s).Supplementary materialSupplemental data for this article can be accessed online at https://doi.org/10.1080/15567036.2023.2275711Additional informationNotes on contributorsSenthurselvi SSenthurselvi S, a Research scholar in the Department of Chemistry at Manonmaniam Sundaranar University, Tirunelveli. Her main area of study is the green catalytic process for turning waste plastic into aviation fuel. In National and International conferences, she has participated and delivered more than 10 papers, and won one award for best poster. Two research papers were published in her work.Chellapandian KannanChellapandian Kannan presently works as a professor and chair of the School of Physical Sciences at Manonmaniam Sundaranar University in Tirunelveli. His teaching and research career spans over 22 years. His areas of expertise include environmental science, green catalysis, and nanoporous solid acid production. He has published over 85 research articles in reputale publications. Two patents were granted and one book was published. Under his guidance 12 Ph. D were awarded.
摘要:采用简易法合成了fealsio4 -H3和ZnAlSiO4-H1。四乙基苯胺(TEPA)是一种结构导向剂。FT-IR、XRD、BET、TPD、TGA和TEM分别证实了骨架、结晶度、孔隙度、酸度、热稳定性(600℃以上)和表面形貌。BET分析表明,两种不同的孔隙宽度(FeAlSiO4- h3: 13.79 nm, ZnAlSiO4-H1: 11.65 nm)是基于金属离子取代的酸度(FeAlSiO4 -H3:6.576和ZnAlSiO4-H1:13.836 cm3/g STP)。在ZnAlSiO4 - H1中,7个模板分子与6个Zn2+离子形成线性配合物,垂直取向形成圆柱形孔。在FeAlSiO4-H3中,8个模板分子与7个Fe2+形成线性配合物,并以横截面方式定位形成狭缝孔。用FeAlSiO4和ZnAlSiO4对聚丙烯进行了催化裂化,转化率为100%。在0.5 g催化剂用量下,H3型孔对喷气燃料的选择性(90%)高于H1型孔(86%)。除此之外,H3型生产柴油(3.8%),H1型生产汽油(10.1%)作为次要产品。合成的航空燃料相当于JET A-1燃料,并通过FT-IR、HPLC和GC-MS进行了表征。关键词:废塑料ch3和H1孔隙类型金属离子- tepa取向孔隙机制碳氢化合物披露声明作者未报告潜在利益冲突。补充材料本文的补充数据可在https://doi.org/10.1080/15567036.2023.2275711Additional信息网站上获得。作者说明:senthurselvi S, Tirunelveli Manonmaniam Sundaranar大学化学系研究学者。她的主要研究领域是将废塑料转化为航空燃料的绿色催化过程。参加国内外会议并发表论文10余篇,获最佳海报奖1项。她发表了两篇研究论文。Chellapandian Kannan目前是Tirunelveli Manonmaniam Sundaranar大学物理科学学院的教授和主席。他的教学和研究生涯长达22年。他的专业领域包括环境科学、绿色催化和纳米多孔固体酸生产。他在知名刊物上发表了超过85篇研究论文。获得两项专利,出版一本书。在他的指导下,12名博士被授予博士学位。
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Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
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