Trends in Renewable Energy最新文献_第5页

Special Cases during the Detection of the Hook Style Energy Theft in Overhead Low-Voltage Power Grids through HS-DET Method – Part 1: High Measurement Differences, Very Long Hook Technique and “Smart” Hooks 利用HS-DET方法检测架空低压电网钩式窃电的特殊案例——第一部分:高测量差、超长钩技术和“智能”钩

Trends in Renewable Energy Pub Date : 2018-12-01 DOI: 10.17737/TRE.2019.5.1.0082

A. Lazaropoulos

引用次数: 4

Conversion of Food Processing Waste to Bioenergy: Bangladesh Perspective 食品加工废弃物转化为生物能源:孟加拉国视角

Trends in Renewable Energy Pub Date : 2018-10-01 DOI: 10.17737/TRE.2019.5.1.0080

M. Amin, Mubassir Jahan Talukder, Rajashri Roy Raju, M. Khan

{"title":"Conversion of Food Processing Waste to Bioenergy: Bangladesh Perspective","authors":"M. Amin, Mubassir Jahan Talukder, Rajashri Roy Raju, M. Khan","doi":"10.17737/TRE.2019.5.1.0080","DOIUrl":"https://doi.org/10.17737/TRE.2019.5.1.0080","url":null,"abstract":"Microbial fuel cell (MFC) is an attractive renewable and sustainable technology to meet up the drastic energy crisis of the world through waste water treatment. This Bioelectrochemical system (BES) converts biomass spontaneously into electricity by the metabolic activity of microorganisms. Food processing industry generally discharges large volume of wastewater, which creates adverse financial and ecological impacts to the industry and environment. In this present contribution, electricity production from food processing industry wastewater that serves as substrates in MFCs was investigated. Dual chambered mediator-less MFC was designed and fabricated using locally available materials. Performance of the MFC was evaluated by measuring potential parameters, such as current generation, current density, change in pH, and change in chemical oxygen demand at different operating conditions. Polarization experiments were conducted to find the maximum power density. Current generation increased with increasing sludge loading, and maximum results were recorded as 90 µA with 9 g of sludge and optimum pH value 8 in the anode chamber. This study documented a maximum power density of 7.42 mW/m 2 with the corresponding current density of 25 mA/m 2 . Citation: Amin, M. S. A., Talukder, M. J., Raju, R. R., and Khan, M. M. R. (2019). Conversion of Food Processing Waste to Bioenergy: Bangladesh Perspective. Trends in Renewable Energy, 5(1), 1-11. DOI: 10.17737/tre.2019.5.1.0080","PeriodicalId":23305,"journal":{"name":"Trends in Renewable Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90455958","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

A Global Review of Empirical Models for Estimating Photosynthetically Active Radiation 估算光合有效辐射的全球经验模型综述

Trends in Renewable Energy Pub Date : 2018-10-01 DOI: 10.17737/TRE.2018.4.2.0079

S. C. Nwokolo, S. O. Amadi

{"title":"A Global Review of Empirical Models for Estimating Photosynthetically Active Radiation","authors":"S. C. Nwokolo, S. O. Amadi","doi":"10.17737/TRE.2018.4.2.0079","DOIUrl":"https://doi.org/10.17737/TRE.2018.4.2.0079","url":null,"abstract":"A good working knowledge of photosynthetically active radiation (PAR) is of vital requirement for determining the terrestrial photosynthesis, primary productivity calculation, ecosystem-atmosphere carbon dioxide, plant physiology, biomass production, natural illumination in greenhouses, radiation climate, remote sensing of vegetation, and radiation regimes of plant canopy, photosynthesis, productivity models of vegetation, etc. However, routine measurement of PAR is not available in most location of interest across the globe. During the past 77 years in order to estimate PAR on hourly, daily and monthly mean basis, several empirical models have been developed for numerous locations globally. As a result, numerous input parameters have been utilized and different functional forms applied. This study was aim at classifying and reviewing the empirical models employed for estimating PAR across the globe. The empirical models so far utilized were classified into ten main categories and presented base on the input parameters applied. The models were further reclassified into numerous main sub-classes (groups) and finally presented according to their developing year. In general, 757 empirical models, 62 functional forms and 32 groups were reported in literature for estimating PAR across the globe. The empirical models utilized were equally compared with models developed using different artificial neural network (ANN); and the result revealed that ANN models are more suitable for estimating PAR across the globe. Thus, this review would provide solar energy researchers with input parameters and functional forms that have been widely used to up to date, and recognizing their importance in estimating PAR globally. Citation: Nwokolo, S. C., and Amadi, S. O. (2018). A Global Review of Empirical Models for Estimating Photosynthetically Active Radiation. Trends in Renewable Energy, 4(2), 236-327. DOI: 10.17737/tre.2018.4.2.0079","PeriodicalId":23305,"journal":{"name":"Trends in Renewable Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75225182","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: 13

Smart Energy and Spectral Efficiency (SE) of Distribution Broadband over Power Lines (BPL) Networks – Part 1: The Impact of Measurement Differences on SE Metrics 电力线(BPL)网络上分配宽带的智能能源和频谱效率(SE)。第1部分:测量差异对SE度量的影响

Trends in Renewable Energy Pub Date : 2018-08-01 DOI: 10.17737/TRE.2018.4.2.0076

A. Lazaropoulos

引用次数: 10

Smart Energy and Spectral Efficiency (SE) of Distribution Broadband over Power Lines (BPL) Networks – Part 2: L1PMA, L2WPMA and L2CXCV for SE against Measurement Differences in Overhead Medium-Voltage BPL Networks 电力线(BPL)网络上分配宽带的智能能量和频谱效率(SE)。第2部分:架空中压BPL网络中用于SE的L1PMA、L2WPMA和L2CXCV测量差异

Trends in Renewable Energy Pub Date : 2018-08-01 DOI: 10.17737/tre.2018.4.2.0077

A. Lazaropoulos

引用次数: 11

Development of Feed-Forward Back-Propagation Neural Model to Predict the Energy and Exergy Analysis of Solar Air Heater 太阳能空气加热器能量预测与火用分析的前馈反向传播神经模型的建立

Trends in Renewable Energy Pub Date : 2018-08-01 DOI: 10.17737/TRE.2018.4.2.0078

Harish Kumar Ghritlahre

{"title":"Development of Feed-Forward Back-Propagation Neural Model to Predict the Energy and Exergy Analysis of Solar Air Heater","authors":"Harish Kumar Ghritlahre","doi":"10.17737/TRE.2018.4.2.0078","DOIUrl":"https://doi.org/10.17737/TRE.2018.4.2.0078","url":null,"abstract":"In the present work, Artificial Neural Network (ANN) model has been developed to predict the energy and exergy efficiency of a roughened solar air heater (SAH). Total fifty data sets of samples, obtained by conducting experiments on SAHs with three different specification of wire-rib roughness on the absorber plates, have been used in this work. These experimental data and calculated values of thermal efficiency and exergy efficiency have been used to develop an ANN model. Levenberg-Marquardt (LM) and Scaled Conjugate Gradient (SCG) learning algorithm were used to train the proposed ANN model. Six numbers of neurons were found with LM learning algorithm in the hidden layer as the optimal value on the basis of statistical error analysis. In the input layer, the time of experiments, mass flow rate, ambient temperature, mean temperature of air, absorber plate temperature and solar radiation intensity have been taken as input parameters; and energy efficiency and exergy efficiency have been taken as output parameters in the output layer. The 6-6-2 neural model has been obtained as the optimal model for prediction. Performance predictions using ANN were compared with the experimental data and a close agreement was observed. Statistical error analysis was used to evaluate the results. Citation: Ghritlahre, H. K. (2018). Development of feed-forward back-propagation neural model to predict the energy and exergy analysis of solar air heater. Trends in Renewable Energy, 4, 213-235. DOI: 10.17737/tre.2018.4.2.0078","PeriodicalId":23305,"journal":{"name":"Trends in Renewable Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90913604","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: 18

Enhancing Frequency of Grid-connected Wind Farm using Energy Capacitor System and Trap RC Shunt Damper Strategies 利用能量电容系统和疏水RC并联阻尼器策略提高并网风电场频率

Trends in Renewable Energy Pub Date : 2018-06-01 DOI: 10.17737/TRE.2018.4.2.0070

K. Okedu

{"title":"Enhancing Frequency of Grid-connected Wind Farm using Energy Capacitor System and Trap RC Shunt Damper Strategies","authors":"K. Okedu","doi":"10.17737/TRE.2018.4.2.0070","DOIUrl":"https://doi.org/10.17737/TRE.2018.4.2.0070","url":null,"abstract":"In this paper, a combination of the conventional energy capacitor system and a proposed two-trap Resistor Capacitor (RC) shunt damper circuitry is used to stabilize a grid network made up of fixed speed wind turbines, steam turbines and hydro turbines. The energy storage system is connected to the terminals of the wind farm and has the capability of stabilizing the grid network during periods of wind speed change. The two-trap damper has the ability to mitigate the mechanical vibration of the wind turbine and increase its output and rotor speed acceleration during disturbances, so the turbine speed is reduced. Simulations were run using Power System Computer Aided Design and Electromagnetic Transient Including DC (PSCAD/EMTDC) environment, for scenarios where grid frequency control was not implemented and when frequency control was employed using the energy storage device. A further investigation was carried out in enhancing the performance of the grid network considering the proposed two-trap shunt DC damper control topology. The results show the improved performance of the variables of the wind turbine and the entire grid network during dynamics, due to the coordinated control strategies of the two-trap RC circuit and the energy capacitor system employed. Citation: Okedu, K. E. (2018). Enhancing Frequency of Grid-connected Wind Farm using Energy Capacitor System and Trap RC Shunt Damper Strategies. Trends in Renewable Energy, 4, 96-110. DOI: 10.17737/tre.2018.4.2.0070","PeriodicalId":23305,"journal":{"name":"Trends in Renewable Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82693589","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

Reconfiguration technique for Optimization of the Photovoltaic array output power under partial shading conditions 部分遮阳条件下光伏阵列输出功率优化的重构技术

Trends in Renewable Energy Pub Date : 2018-06-01 DOI: 10.17737/TRE.2018.4.2.0068

A. M. Mohamed, S. Saafan, A. Attalla, H. Elgohary

{"title":"Reconfiguration technique for Optimization of the Photovoltaic array output power under partial shading conditions","authors":"A. M. Mohamed, S. Saafan, A. Attalla, H. Elgohary","doi":"10.17737/TRE.2018.4.2.0068","DOIUrl":"https://doi.org/10.17737/TRE.2018.4.2.0068","url":null,"abstract":"A partial shading condition is a case under which the PV array is exposed to many problems such as losses of the output power of the PV array, and the PV array has more than one maximum power point (MPP), which makes it so difficult to track the MPP. This paper presents the effect of different partial shading patterns on PV array characteristics and the effect on the output power of the PV array, and provides a comparative literature review on methods to mitigate these effects and the drawbacks of these methods. It also proposed a new reconfiguration strategy that increases the output power of the PV array by 13.8 % from the total power under shadow condition, and a new technique for enhancing the output power of the PV array by 20 % of the total power under fully illumining conditions by controlling the switch matrix between the photovoltaic array and adaptive batteries bank. This paper gives a solution for the problem of the difficulty of tracking the MPP, because the proposed strategy makes only one MPP. The simulation was carried out by using MATLAB Simulink under different shading patterns. Citation: Mohamed, A. M., Saafan, S. M., Attalla, A. M., and Elgohary, H. (2018). Reconfiguration technique for Optimization of the Photovoltaic array output power under partial shading conditions. Trends in Renewable Energy, 4, 111-124. DOI: 10.17737/tre.2018.4.2.0068","PeriodicalId":23305,"journal":{"name":"Trends in Renewable Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91115593","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: 2

Capacity Performance of Overhead Transmission Multiple-Input Multiple-Output Broadband over Power Lines Networks: The Insidious Effect of Noise and the Role of Noise Models 架空传输多输入多输出宽带电力网的容量性能:噪声的潜在影响和噪声模型的作用

Trends in Renewable Energy Pub Date : 2016-06-01 DOI: 10.17737/TRE.2016.2.2.0023

A. Lazaropoulos

{"title":"Capacity Performance of Overhead Transmission Multiple-Input Multiple-Output Broadband over Power Lines Networks: The Insidious Effect of Noise and the Role of Noise Models","authors":"A. Lazaropoulos","doi":"10.17737/TRE.2016.2.2.0023","DOIUrl":"https://doi.org/10.17737/TRE.2016.2.2.0023","url":null,"abstract":"Extending the analysis already presented in [1], this paper considers broadband potential of overhead (OV) transmission multiple-input multiple-output (MIMO) broadband over power lines (BPL) networks when different noise conditions occur and different well-proven noise models are adopted. The contribution of this paper is two-fold. First, the broadband potential of a great number of indicative OV high-voltage (HV) BPL topologies and of MIMO transmission schemes is studied in terms of appropriate capacity metrics. The relevant numerical results reveal the significant dependence of ΜΙΜΟ capacity metrics on noise conditions. Second, various well-known BPL noise models from the literature are compared on the basis of their achieved OV HV MIMO BPL capacity. Through the careful study of the capacity results of noise models, it is demonstrated that spectrally flat additive white Gaussian noise (AWGN) may be comfortably assumed as an efficient noise model in transmission MIMO BPL networks. Also in MIMO BPL networks, the comparative capacity analysis of noise models shows small differences among them in the 3-88MHz frequency range. Citation ：Lazaropoulos, A. G. (2016). Capacity Performance of Overhead Transmission Multiple-Input Multiple-Output Broadband over Power Lines Networks: The Insidious Effect of Noise and the Role of Noise Models. Trends in Renewable Energy, 2(2), 61-82. DOI: 10.17737/tre.2016.2.2.0023","PeriodicalId":23305,"journal":{"name":"Trends in Renewable Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88956756","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: 10

Introduction of Abnormal Combustion in Hydrogen Internal Combustion Engines and the Detection Method 氢内燃机异常燃烧及检测方法介绍

Trends in Renewable Energy Pub Date : 1900-01-01 DOI: 10.17737/tre.2022.8.1.00136

Jiahui Liu

引用次数: 0