2016 International Renewable and Sustainable Energy Conference (IRSEC)最新文献_第4页

Modeling and prediction of reflectance loss in CSP plants using a non linear autoregressive model with exogenous inputs (NARX) 基于外源输入非线性自回归模型(NARX)的CSP电站反射损失建模与预测

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI: 10.1109/IRSEC.2016.7984071

S. Bouaddi, Ihlal Ahmed, Omar Ait mensour

{"title":"Modeling and prediction of reflectance loss in CSP plants using a non linear autoregressive model with exogenous inputs (NARX)","authors":"S. Bouaddi, Ihlal Ahmed, Omar Ait mensour","doi":"10.1109/IRSEC.2016.7984071","DOIUrl":"https://doi.org/10.1109/IRSEC.2016.7984071","url":null,"abstract":"Dust buildup on the surface of reflectors is a major challenge facing concentrated solar power (CSP) plants deployed in the MENA (Middle East and North Africa) region. Soiled CSP reflectors cause the efficiency of the solar field to drop. Thus, monitoring the loss of reflectance is essential to develop adequate cleaning strategies and evaluate the economics of the plants. The goal of this study is to model and predict the loss of reflectance in CSP plants. For this purpose, we modeled the loss of reflectance of second surface silvered glass mirrors exposed for 6 months in southwest Morocco using the non linear autoregressive with exogenous inputs (NARX) and Bayesian regularization. First, we adopted various architectures by varying the number of neurons in the hidden layer and adopting multiple tapped delay line. Then, we selected the optimal model based on the correlation coefficient (R) and the mean square error (MSE). The results revealed that the optimal model has 30 neurons in the hidden layer and 2 time delays, with a mean square error MSE = 0.029 and an overall Rtot= 0.62. To verify this model adequacy for the prediction of future reflectance data, we tested it on completely new data. The forecasting performance of the optimal model resulted in a mean square forecasting error of MSEƒ =0.049. Generally, the forecasted reflectance values are quite good and follow the expected soiling pattern.","PeriodicalId":180557,"journal":{"name":"2016 International Renewable and Sustainable Energy Conference (IRSEC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122405158","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: 6

p- and n-type doping of zinc oxide through electrochemical methods 用电化学方法掺杂P型和n型氧化锌

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI: 10.1109/IRSEC.2016.7984057

M. Sahal, M. Mollar, B. Marí

{"title":"p- and n-type doping of zinc oxide through electrochemical methods","authors":"M. Sahal, M. Mollar, B. Marí","doi":"10.1109/IRSEC.2016.7984057","DOIUrl":"https://doi.org/10.1109/IRSEC.2016.7984057","url":null,"abstract":"Cu- and Cl-doped ZnO thin films were electrodeposited on conductive glass substrates in a non-aqueous electrolyte containing Cu, Cl and Zn salts. The Cu content of the films was found to be proportional to the [Cu2+]/[Zn2+] precursor ratio in the deposition electrolyte. Electrodeposited ZnO:Cu thin films exhibit hexagonal wurtzite structure with (002) preferred orientation. A transition from n-type to p-type was observed for ZnO:Cu films with a [Cu2+]/[Zn2+] ratio higher than 2% as inferred from the change in the direction of the photocurrent. Further, by the addition of different amounts of chlorine ions in the starting electrolyte results in an effective n-type doping of electrochemically synthesized ZnO thin films. The ratio between chlorine and zinc cations was varied between 0 and 2 while the zinc concentration in the solution was kept constant. When the concentration of chloride in the bath increases an effective n-type doping of ZnO films takes place. n-type doping is evidenced by the rise of donors concentration obtained from Mott-Schottky measurements as well as from the blue shift observed in the optical gap owing to the Burstein-Moss effect. When electrodepositing ZnO:Cu on ZnO:Cl layers a homojunction device is formed so evidencing the p- and n-type respective character of the layers. The rectifying characteristics of the ZnO:Cu/ZnO:Cl homojunction further confirm the p- and n-type behavior of ZnO:Cu and ZnO:Cl layers, respectively.","PeriodicalId":180557,"journal":{"name":"2016 International Renewable and Sustainable Energy Conference (IRSEC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122444692","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: 3

A process simulation model for a proposed Moroccan supply chain of electricity 拟建的摩洛哥电力供应链过程仿真模型

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI: 10.1109/IRSEC.2016.7983999

Houda Mezouar, A. El Afia

引用次数: 5

Thickness effect on Cu2ZnSnS4 properties using non-toxic and low-cost process 无毒低成本工艺对Cu2ZnSnS4性能的影响

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI: 10.1109/IRSEC.2016.7983987

Z. Laghfour, Mohammed Bouzbib, S. Aazou, M. Sekkati, M. Abd-lefdil, M. Taibi, G. Schmerber, A. Dinia, A. Slaoui, A. Ulyashin, Z. Sekkat

引用次数: 2

Battery dynamic energy model for use in electric vehicle simulation 用于电动汽车仿真的电池动态能量模型

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI: 10.1016/J.IJHYDENE.2017.05.165

Kawtar Benabdelaziz, M. Maaroufi

引用次数: 22

Admittance analysis of thermally evaporated-hole selective MoO3 on crystalline silicon 晶体硅上热蒸发孔选择性MoO3的导纳分析

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI: 10.1109/IRSEC.2016.7983991

Doğuşcan Ahiboz, H. Nasser, R. Turan

引用次数: 8

Numerical study of heat transfer by natural convection in a large-scale cavity heated from below 大尺度下加热腔内自然对流换热的数值研究

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI: 10.1109/IRSEC.2016.7984031

N. Abouricha, M. El Alami, K. Souhar

引用次数: 2

Effects of sulfur concentration on structural, optical and electrical properties of Tin Oxide thin films deposited by spray pyrolysis technique 硫浓度对喷雾热解法制备氧化锡薄膜结构、光学和电学性能的影响

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI: 10.1109/IRSEC.2016.7983875

A. El hat, M. Rouchdi, A. Hadri, C. Nassiri, F. Z. Chafi, B. Fares, L. Laânab, N. Hassanain, H. Labrim, A. Mzerd

{"title":"Effects of sulfur concentration on structural, optical and electrical properties of Tin Oxide thin films deposited by spray pyrolysis technique","authors":"A. El hat, M. Rouchdi, A. Hadri, C. Nassiri, F. Z. Chafi, B. Fares, L. Laânab, N. Hassanain, H. Labrim, A. Mzerd","doi":"10.1109/IRSEC.2016.7983875","DOIUrl":"https://doi.org/10.1109/IRSEC.2016.7983875","url":null,"abstract":"Thin films of Tin oxide doped with deferent concentration of Sulfur were prepared on glass substrates at 400 °C by spray pyrolysis technique. The thin films were characterized to study their physical properties. Effects of Sulfur concentration on structural, optical and electrical properties of transparent Tin Oxide thin films were investigated in the Sulfur content range (0–10) at%. It was observed from X-ray diffraction patterns (XRD) that the films have a polycrystalline structure and the intensity of the peaks depends on the doping content. No diffraction peak related to dopants in XRD patterns along with a shift in peaks angles to SnO<inf>2</inf> proved that S ions were doped into SnO<inf>2</inf> thin films and the size of the grains has been changed from 3.7 to 4.1 nm. The optical gap of Sn<inf>1−x</inf>S<inf>x</inf>O<inf>2</inf> thin films was determined to be about 2.58 to 3.63 eV. From the Hall Effect measurements, the minimum resistivity 6.34×10<sup>−2</sup> (Ω.cm) was obtained from S-doped SnO<inf>2</inf> (5 at. %).","PeriodicalId":180557,"journal":{"name":"2016 International Renewable and Sustainable Energy Conference (IRSEC)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134468540","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: 3

Solar drying of agro-industrial wastes using a solar greenhouse 利用日光温室对农工废弃物进行太阳能干燥

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI: 10.1109/IRSEC.2016.7983933

N. Metidji

引用次数: 6

RBF neural network sliding mode control of a PMSG based wind energy conversion system 基于PMSG的风能转换系统的RBF神经网络滑模控制

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI: 10.1109/IRSEC.2016.7984060

S. Boulouma, H. Belmili

{"title":"RBF neural network sliding mode control of a PMSG based wind energy conversion system","authors":"S. Boulouma, H. Belmili","doi":"10.1109/IRSEC.2016.7984060","DOIUrl":"https://doi.org/10.1109/IRSEC.2016.7984060","url":null,"abstract":"In this paper, a radial basis function (RBF) neural networks sliding mode controller is designed for a permanent magnet synchronous generator (PMSG) based wind energy conversion system (WECS). The aim is to ensure maximum power capture. Within this control scheme, the WECS nonlinear control affine model is transformed into the canonical form via a diffeomorphism transformation. Afterwards, a RBF neural networks based controller is built around the approximation of an ideal sliding mode controller to ensure reference tracking. In this controller the system parameters are approximated through an RBF neural network, and then these approximations are substituted into their counterparts from the ideal controller. The parameter update laws are derived based on Lyapunov synthesis. A compensation term is appended to the composite controller to ensure robustness against approximation errors. Stability and tracking properties are proved using Lyapunov analysis. A numerical simulation is carried out on a typical 3kW PMSG based wind turbine to access the effectiveness of the proposed controller. The results are then discussed to assess the effectiveness of the proposed neural networks controller.","PeriodicalId":180557,"journal":{"name":"2016 International Renewable and Sustainable Energy Conference (IRSEC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117259131","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