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Exergy and Energy Analysis of Wind-Thermal System 风热系统的火用与能量分析
Pub Date : 2021-08-01 DOI: 10.17737/tre.2021.7.1.00131
N. Norouzi
Current wind systems are intermittent and cannot be used as the baseload energy source. The research on the concept of wind power using direct thermal energy conversion and thermal energy storage, called wind powered Thermal Energy System (WTES), opened the door to a new energy system called Wind-thermal, which is a strategy for developing baseload wind power systems. The thermal energy is generated from the rotating energy directly at the top of the tower by the heat generator, which is a simple and light electric brake. The rest of the system is the same as the tower type concentrated solar power (CSP). This paper’s results suggest that the energy and exergy performance of the WTES (62.5% and 29.8%) is comparable to that of conventional wind power, which must be supported by the backup thermal plants and grid enhancement. This cogeneration nature of the WTES system makes this system suitable for using wind power as a direct heat source in several heat-demanding processes such as chemical production. Also, the light heat generator reduces some issues of wind power, such as noise and vibration, which are two main bottlenecks of the wind power technology.
目前的风力发电系统是间歇性的,不能作为基本负荷的能源。利用直接热能转换和热能储存的风力发电概念的研究,称为风力热能系统(WTES),打开了一扇名为风-热的新能源系统的大门,这是发展基本负荷风力发电系统的战略。热能由热发生器直接在塔顶旋转能量产生,它是一种简单轻便的电动制动器。系统的其余部分与塔式聚光太阳能(CSP)相同。研究结果表明,WTES的能量和火用性能(62.5%和29.8%)与常规风电相当,必须有备用火电厂和电网增强的支持。WTES系统的热电联产特性使得该系统适合在一些需要热量的过程中使用风能作为直接热源,例如化学生产。此外,光热发生器还减少了风力发电的一些问题,如噪音和振动,这是风力发电技术的两个主要瓶颈。
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引用次数: 0
WITHDRAWN: Exergy and Energy Analysis of a CHP System with a Gas Turbine and a Horizontal Axis Wind Turbine 撤回:燃气轮机和水平轴风力发电机的热电联产系统的火用和能量分析
Pub Date : 2021-07-29 DOI: 10.17737/tre.2021.7.1.00130
N. Norouzi
This article has been withdrawn at the request of the author. The Publisher apologizes for any inconvenience this may cause.
应作者的要求,这篇文章已被撤回。对于由此造成的任何不便,出版商深表歉意。
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引用次数: 0
Pyrolysis-Gas Chromatography/Mass Spectrometry Analysis of Oils from Different Sources 不同来源油脂的热解-气相色谱/质谱分析
Pub Date : 2021-05-23 DOI: 10.17737/TRE.2021.7.1.00127
Q. Qiu, Yiting Zhang
Regenerated gutter oil (i.e., waste oil) accounts for 10% of the edible oil market, which has caused serious food safety issues. Currently, there is no standard protocol for the identification of the gutter oil. In this study, the pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) method was employed to analyze eleven oil samples including edible vegetable oils (tea oil, corn oil, olive oil, sunflower oil, peanut oil and blend vegetable oil) and waste oils (used frying oil, lard, chicken fat, inferior oil and kitchen waste grease). Three factors of pyrolysis temperature, reaction time and sample volume were investigated to optimize the analytical parameters. The optimal pyrolysis conditions were determined to be 600°C, 1 min and an injection volume of 0.3 μL. Five characteristic components (tetradecane, z,z-9,12-octadecadienoic acid, decanoic acid-2-propenyl ester, 17-octadecenoic acid, and z-9-octadecenoic acid) were found in all oil samples. The existence of C11-C16 olefins in the pyrolytic products of the animal fats and the other low-quality oils could be utilized to distinguish vegetable oils from gutter oils.
再生地沟油(即废油)占食用油市场的10%,造成了严重的食品安全问题。目前,地沟油的鉴别还没有标准的规程。本研究采用热解-气相色谱/质谱(pygc /MS)方法对11种油类样品进行了分析,包括食用植物油(茶油、玉米油、橄榄油、葵花籽油、花生油和混合植物油)和废油(用过的煎炸油、猪油、鸡油、劣质油和厨余油脂)。考察了热解温度、反应时间和样品体积三个因素对分析参数的影响。最佳热解条件为600℃、1 min、进样量0.3 μL。在所有油样品中均发现了五种特征成分(十四烷、z、z-9、12-十八烯二酸、癸酸-2-丙烯酯、17-十八烯酸和z-9-十八烯酸)。动物脂肪和其他劣质油脂的热解产物中存在C11-C16烯烃,可用于区分植物油和地沟油。
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引用次数: 0
World on the Road to 100% Renewable Energy 世界走上100%可再生能源之路
Pub Date : 2021-01-01 DOI: 10.17737/tre.2021.7.1.00132
N. Norouzi, M. Fani
In the study, the current and future status of renewable energy resources were compiled in the light of large databases of national and international renewable energy institutions, and the latest situation in the world in the transition to 100% renewable energy was examined. The extent of the goal for the transition to 100% renewable energy has been determined, and predictions have been made based on all this information. In today’s world where energy and environmental problems are on the agenda, countries’ transition to renewable energy is the primary solution. This goal is called the transition to 100% renewable energy, which brings advantages such as providing needed energy and producing clean energy. Today, renewable energy sources account for more than one-third of the global energy capacity, and the world is rapidly moving towards 100% renewable energy. Compared with 2017, the total amount of renewable energy in 2018 increased by 181 GW, and the number of countries with an increase in the proportion of renewable energy increased. Taking into account the external dependence of the use of fossil fuels and environmental issues, this development is at a promising level in the future. In order to shift from highly polluting oil resources to natural gas and renewable resources, this article aims to investigate the current global energy transition trends, and then propose some important strategies to get closer to upstream goals and obligations in this way.
在研究中,结合国家和国际可再生能源机构的大型数据库,编制了可再生能源资源的现状和未来状况,考察了世界向100%可再生能源转型的最新情况。向100%可再生能源过渡的目标范围已经确定,并根据所有这些信息做出了预测。当今世界,能源和环境问题已提上议事日程,各国向可再生能源过渡是首要解决方案。这一目标被称为向100%可再生能源过渡,它带来了提供所需能源和生产清洁能源等优势。今天,可再生能源占全球能源容量的三分之一以上,世界正迅速向100%可再生能源迈进。与2017年相比,2018年可再生能源总量增加181吉瓦,可再生能源占比增加的国家增多。考虑到使用矿物燃料的外部依赖性和环境问题,这一发展在未来是一个有希望的水平。为了从高污染的石油资源转向天然气和可再生资源,本文旨在研究当前全球能源转型趋势,然后提出一些重要的策略,以这种方式更接近上游的目标和义务。
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引用次数: 6
Technical Overview of the Net Metering in Lebanon 黎巴嫩净计量技术综述
Pub Date : 2020-07-01 DOI: 10.17737/tre.2020.6.3.00126
Issa S. Shabani, M. Chaaban
In order to realize the best practices to allow the individuals participate in renewable energy production, a collection of legislation was ratified, and a set of decisions was introduced to encourage the prosumer concept. This notion, which is called Net Metering (NEM), is a billing mechanism that credits PV solar system owners for the energy injected to the grid. Lebanon adopts the NEM policy to reduce the demand and boost the grid through increasing the generation capacity. The decline of solar equipment cost encourages people to subscribe to the NEM service by utilizing the PV solar systems. The implementation of the NEM service provides the customers with leverage over their electricity bills. However, connecting the home micro grid into the vast grid is not easy. It imposes many technical challenges which are discussed in this article.
为了实现允许个人参与可再生能源生产的最佳实践,批准了一系列立法,并引入了一系列决定来鼓励产消概念。这一概念被称为净计量(NEM),是一种将注入电网的能量记入光伏太阳能系统所有者的计费机制。黎巴嫩采取NEM政策,通过增加发电能力来减少需求,促进电网发展。太阳能设备成本的下降鼓励人们通过使用光伏太阳能系统来订阅NEM服务。NEM服务的实施为客户提供了对电费的杠杆作用。然而,将家庭微电网接入广大电网并非易事。它带来了许多技术挑战,本文将对此进行讨论。
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引用次数: 1
Business Analytics and IT in Smart Grid – Part 1: The Impact of Measurement Differences on the iSHM Class Map Footprints of Overhead Low-Voltage Broadband over Power Lines Topologies 智能电网中的业务分析和IT -第1部分:测量差异对架空低压宽带在电力线拓扑上的iSHM类地图足迹的影响
Pub Date : 2020-05-01 DOI: 10.17737/tre.2020.6.2.00117
A. Lazaropoulos
Due to the smart grid (SG) operation, the power utilities are dealing with a cataclysm of big data that demands advanced information technology (IT) infrastructure and business analytics while one cause of this growth is the nature of the power grid operation that demands real-time measurements. In [1], [2], the theoretical framework and the numerical results for the interoperability of Deterministic Hybrid Model (DHM), initial Statistical Hybrid Model (iSHM), the definition procedure and the class maps have been presented for the overhead low-voltage broadband over power lines (OV LV BPL) networks as well as the iSHM footprints. On the basis of the five real indicative OV LV BPL topologies of [1], [2], the impact of measurement differences that follow either continuous uniform distributions (CUDs) or normal distributions (NDs) of different intensities is first highlighted on iSHM footprints. Citation:  Lazaropoulos, A. G. (2020). Business Analytics and IT in Smart Grid – Part 1: The Impact of Measurement Differences on the iSHM Class Map Footprints of Overhead Low-Voltage Broadband over Power Lines Topologies. Trends in Renewable Energy, 6, 146-176. DOI: 10.17737/tre.2020.6.2.00117
由于智能电网(SG)的运行,电力公司正在处理大数据的灾难,这需要先进的信息技术(IT)基础设施和业务分析,而这种增长的一个原因是电网运行的性质,需要实时测量。在[1]和[2]中,给出了确定性混合模型(DHM)、初始统计混合模型(iSHM)互操作性的理论框架和数值结果,并给出了架空低压宽带电路线(OV - LV BPL)网络的定义过程和类图,以及iSHM足迹。在[1]、[2]这5个实际指示性OV LV BPL拓扑的基础上,首先在iSHM足迹上强调了遵循不同强度的连续均匀分布(CUDs)或正态分布(NDs)的测量差异的影响。引用本文:Lazaropoulos, a.g.(2020)。智能电网中的业务分析和IT -第1部分:测量差异对架空低压宽带在电力线拓扑上的iSHM类地图足迹的影响可再生能源趋势,6,146-176。DOI: 10.17737 / tre.2020.6.2.00117
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引用次数: 3
Statistical Channel Modeling of Overhead Low Voltage Broadband over Power Lines (OV LV BPL) Networks – Part 1: The Theory of Class Map Footprints of Real OV LV BPL Topologies, Branch Line Faults and Hook-Style Energy Thefts 架空低压宽带电力线(OV - LV BPL)网络的统计信道建模-第1部分:实际OV - LV BPL拓扑的类映射足迹理论、分支线路故障和钩式能量盗窃
Pub Date : 2020-03-01 DOI: 10.17737/tre.2020.6.1.00112
A. Lazaropoulos
Due to the significant volatility of Broadband over Power Lines (BPL) networks regarding their circuital and topological characteristics, channel statistical modeling recently gains special attention from the BPL communications engineers. Among the recently presented channel attenuation statistical models, initial statistical hybrid model (iSHM) and modified statistical hybrid model (mSHM) have been theoretically defined and applied to overhead medium voltage (OV MV), underground medium voltage (UN MV) and overhead high voltage (OV HV) BPL networks so far. Apart from the iSHM and mSHM definition and application, the theory of the definition procedure of new virtual distribution and transmission BPL topologies, which describes the phases towards defining statistically equivalent BPL topologies and topology subclasses to the real indicative ones, has been demonstrated as well as the class maps, which are 2D capacity contour plots with respect to the channel attenuation statistical distributions (CASDs) parameters of iSHM and mSHM. In this pair of papers, iSHM, mSHM, the definition procedure of new virtual BPL topologies and the class mapping are first applied to overhead low voltage (OV LV) BPL networks. Based on the class maps and the BPL topology database of Topology Identification Methodology (TIM), the required theory for illustrating the footprint of the real OV LV BPL topologies is first presented on class maps in this paper. On the basis of the class maps and the BPL topology database of Fault and Instability Identification Methodology (FIIM), the required theory for illustrating the footprint of the OV LV BPL topologies with branch line faults is first identified on class maps in this paper. On the basis of the class maps and the BPL topology database of hook style energy theft detection method (HS-DET method), the required theory for illustrating the footprint of the OV LV BPL topologies with a hook style energy theft is first demonstrated on class maps in this paper. Citation:  Lazaropoulos, A. G. (2020). Statistical Channel Modeling of Overhead Low Voltage Broadband over Power Lines (OV LV BPL) Networks – Part 1: The Theory of Class Map Footprints of Real OV LV BPL Topologies, Branch Line Faults and Hook-Style Energy Thefts. Trends in Renewable Energy, 6, 61-87. DOI: 10.17737/tre.2020.6.1.00112
由于电力线宽带(BPL)网络在电路和拓扑特性方面的显著波动性,信道统计建模最近受到了BPL通信工程师的特别关注。在最近提出的信道衰减统计模型中,初始统计混合模型(iSHM)和改进统计混合模型(mSHM)已被理论上定义并应用于架空中压(OV MV)、地下中压(UN MV)和架空高压(OV HV) BPL网络。除了iSHM和mSHM的定义和应用之外,还展示了新的虚拟分布和传输BPL拓扑的定义过程理论,该理论描述了将统计等效BPL拓扑和拓扑子类定义为实际指示性拓扑的阶段,以及类图,即iSHM和mSHM信道衰减统计分布(casd)参数的二维容量等高线图。本文首次将iSHM、mSHM、新型虚拟BPL拓扑的定义过程和类映射方法应用于架空低压BPL网络。本文以类映射和拓扑识别方法(TIM)的BPL拓扑数据库为基础,首先在类映射上给出了描述实际的OV LV BPL拓扑占用空间所需的理论。在类图和故障与不稳定性识别方法(FIIM)的BPL拓扑数据库的基础上,本文首先在类图上确定了表示带有分支线路故障的OV - LV BPL拓扑足迹所需的理论。本文在类映射和钩子式能量盗窃检测方法(HS-DET方法)的BPL拓扑数据库的基础上,首先在类映射上论证了钩子式能量盗窃的OV - LV BPL拓扑的足迹描述所需要的理论。引用本文:Lazaropoulos, a.g.(2020)。架空低压宽带电力线(OV - LV BPL)网络的统计信道建模-第1部分:实际OV - LV BPL拓扑的类映射足迹理论、分支线路故障和钩式能量盗窃可再生能源发展趋势,6,61-87。DOI: 10.17737 / tre.2020.6.1.00112
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引用次数: 5
Impact of Sunshine Duration and Clearness Index on Diffuse Solar Radiation Estimation in Mountainous Climate 日照时数和净度指数对山地气候散射太阳辐射估算的影响
Pub Date : 2019-11-30 DOI: 10.17737/tre.2019.5.3.00107
S. C. Nwokolo, Christiana Queennet Otse
In this paper, measured data of solar radiation was applied to develop forty-three (43) empirical models for estimation of monthly average diffuse solar radiation using clearness index, sunshine duration and a combination of them as predictors. The data covered a period of two years from May 2015 to April 2017 and was measured at Mehran University of Engineering and Technology, Hyderabad, Pakistan. Through a comprehensive statistical performance analysis, 43 dimensional models developed were tested for constructing the most accurate regression model to predict the monthly mean daily diffuse solar radiation in Hyderabad, Pakistan. On the whole, the model 42 – a hybrid of sunshine duration and clearness index predictors of diffuse fraction outperformed the remaining models proposed in this study. The best model (model 42) was then compared with 5 models and 5 measured data of diffuse solar radiation available in the literature and the NASA database by applying statistical indicators such as MBE, MPE, RMSE, RRMSE, R 2 and GPI. Through the analysis, the hybrid of sunshine duration and clearness index predictors of diffuse fraction model (model 42) was selected as the most appropriate model. The study concluded that the proposed hybrid model can serve as a baseline for the design of photovoltaic systems and estimate the monthly mean daily diffuse solar radiation on the horizontal surface for Hyderabad, Pakistan and other locations with similar local climate conditions. Citation:  Nwokolo, S.C. and Otse, C.Q. (2019). Impact of Sunshine Duration and Clearness Index on Diffuse Solar Radiation Estimation in Mountainous Climate. Trends in Renewable Energy, 5, 307-332. DOI: 10.17737/tre.2019.5.3.00107
本文利用太阳辐射的实测数据,建立了43个经验模型,以净度指数、日照时数及其组合为预测因子估算月平均太阳漫射辐射。该数据涵盖了2015年5月至2017年4月的两年时间,并在巴基斯坦海得拉巴的Mehran工程技术大学进行了测量。通过综合统计性能分析,对建立的43维模型进行了测试,以构建最准确的回归模型来预测巴基斯坦海得拉巴的月平均日漫射太阳辐射。总体而言,混合日照时数和弥散分数清晰度指数预测因子的模型42优于本研究提出的其他模型。利用MBE、MPE、RMSE、RRMSE、r2、GPI等统计指标,将最佳模型(模型42)与文献中已有的5个模型和5个太阳漫射辐射实测数据以及NASA数据库进行比较。通过分析,选择散射分数模型(模型42)的日照时数和清晰度指数混合预测因子作为最合适的模型。该研究的结论是,所提出的混合模型可以作为光伏系统设计的基线,并估计巴基斯坦海得拉巴和其他具有类似当地气候条件的地区水平面上的月平均日漫射太阳辐射。引用本文:Nwokolo, S.C.和Otse, C.Q.(2019)。日照时数和净度指数对山地气候散射太阳辐射估算的影响可再生能源动态,5,307-332。DOI: 10.17737 / tre.2019.5.3.00107
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引用次数: 7
Virtual Indicative Broadband over Power Lines Topologies for Respective Subclasses by Adjusting Channel Attenuation Statistical Distribution Parameters of Statistical Hybrid Models (Class Maps) – Part 2: Numerical Results for the Overhead and Underground Medium-Voltage Power Grids 通过调整信道衰减统计混合模型(类图)的统计分布参数的各子类电力线拓扑上的虚拟指示宽带。第2部分:架空和地下中压电网的数值结果
Pub Date : 2019-08-16 DOI: 10.17737/TRE.2019.5.3.00100
A. Lazaropoulos
With reference to the initial statistical hybrid model (iSHM) and modified statistical hybrid model (mSHM), the theory of the definition procedure of new virtual indicative distribution BPL topologies by appropriately adjusting the channel attenuation statistical distributions (CASDs) parameters of iSHM and mSHM has been presented in [1]. In this paper, the results of the definition procedure for the OV and UN MV BPL networks are first presented through the prism of the proposed class maps of iSHM and mSHM. Citation:  Lazaropoulos, A. G. (2019). Virtual Indicative Broadband over Power Lines Topologies for Respective Subclasses by Adjusting Channel Attenuation Statistical Distribution Parameters of Statistical Hybrid Models (Class Maps) – Part 2: Numerical Results for the Overhead and Underground Medium-Voltage Power Grids. Trends in Renewable Energy, 5, 258-281. DOI: 10.17737/tre.2019.5.3.00100
参考初始统计混合模型(initial statistical hybrid model, iSHM)和改进统计混合模型(modified statistical hybrid model, mSHM),文献[1]提出了通过适当调整iSHM和mSHM的信道衰减统计分布(channel attenuation statistical distribution, casd)参数来定义新的虚拟指示性分布BPL拓扑的理论过程。本文首先通过提出的iSHM和mSHM类映射的棱镜,给出了OV和UN MV BPL网络定义过程的结果。引用本文:Lazaropoulos, a.g.(2019)。通过调整信道衰减统计混合模型(类图)的统计分布参数的各子类电力线拓扑上的虚拟指示宽带。第2部分:架空和地下中压电网的数值结果可再生能源发展趋势,5,258-281。DOI: 10.17737 / tre.2019.5.3.00100
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引用次数: 6
Virtual Indicative Broadband over Power Lines Topologies for Respective Subclasses by Adjusting Channel Attenuation Statistical Distribution Parameters of Statistical Hybrid Models (Class Maps) – Part 3: The Case of Overhead Transmission Power Grids 通过调整信道衰减统计混合模型(类图)的统计分布参数用于各自子类的电力线拓扑上的虚拟指示宽带。第3部分:架空输电电网的情况
Pub Date : 2019-08-16 DOI: 10.17737/TRE.2019.5.3.00101
A. Lazaropoulos
In [1], [2], the theoretical framework and the numerical results concerning the class mapping of overhead and underground medium voltage broadband over power lines (OV and UN MV BPL) topologies have been presented on the basis of the recently proposed initial statistical hybrid model (iSHM), modified statistical hybrid model (mSHM) and class map definition procedure. In this paper, all the recent findings regarding the statistical channel modeling and class mapping are first applied to transmission BPL networks; say, OV high voltage (HV) BPL topologies. The numerical results of OV HV BPL networks are compared against the respective ones of OV and UN distribution networks revealing significant similarities and differences. Finally, the impact of considering minimum or maximum capacity value instead of the average one during the definition procedure is investigated as well as the behavior of the total simulation time of class mapping. Citation:  Lazaropoulos, A. G. (2019). Virtual Indicative Broadband over Power Lines Topologies for Respective Subclasses by Adjusting Channel Attenuation Statistical Distribution Parameters of Statistical Hybrid Models (Class Maps) – Part 3: The Case of Overhead Transmission Power Grids. Trends in Renewable Energy, 5, 282-306. DOI: 10.17737/tre.2019.5.3.00101
在文献[1]、[2]中,基于最近提出的初始统计混合模型(iSHM)、修正统计混合模型(mSHM)和类图定义程序,给出了架空和地下中压宽带输电线路(OV和UN MV BPL)拓扑类映射的理论框架和数值结果。本文首先将统计信道建模和类映射的最新研究成果应用于传输BPL网络;例如,OV高压(HV) BPL拓扑。将OV HV BPL网络的数值结果与OV和UN配电网的数值结果进行了比较,发现了显著的异同。最后,研究了在定义过程中考虑最小或最大容量值而不是平均容量值的影响,以及类映射的总仿真时间的行为。引用本文:Lazaropoulos, a.g.(2019)。通过调整信道衰减统计混合模型(类图)的统计分布参数用于各自子类的电力线拓扑上的虚拟指示宽带。第3部分:架空输电电网的情况可再生能源动态,5,282-306。DOI: 10.17737 / tre.2019.5.3.00101
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引用次数: 4
期刊
Trends in Renewable Energy
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