Pub Date : 2015-09-10DOI: 10.1109/ICSOEB.2015.7244938
I. Bradshaw, M. Weeber, J. Bohner
The increasing demand for composite products made from carbon fiber reinforced plastics (CFRP) raises the amount of damages occurring during their use in a large variety and number. Several repair techniques have been developed in recent years in order to address ecological concerns related to the usage of CFRPs. Nevertheless according to the current state of the art damaged high performance products are disposed in most cases. In this paper a methodology is presented on how to establish repair as a process in prepreg and autoclave based manufacturing. Furthermore the results of a practical implementation in the research laboratory “Green Factory Bavaria” are shown.
{"title":"Integrating CFTP repair technologies in manufacturing processes: An approach for prepreg processes","authors":"I. Bradshaw, M. Weeber, J. Bohner","doi":"10.1109/ICSOEB.2015.7244938","DOIUrl":"https://doi.org/10.1109/ICSOEB.2015.7244938","url":null,"abstract":"The increasing demand for composite products made from carbon fiber reinforced plastics (CFRP) raises the amount of damages occurring during their use in a large variety and number. Several repair techniques have been developed in recent years in order to address ecological concerns related to the usage of CFRPs. Nevertheless according to the current state of the art damaged high performance products are disposed in most cases. In this paper a methodology is presented on how to establish repair as a process in prepreg and autoclave based manufacturing. Furthermore the results of a practical implementation in the research laboratory “Green Factory Bavaria” are shown.","PeriodicalId":275696,"journal":{"name":"2015 International Conference on Solar Energy and Building (ICSoEB)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125821876","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}
Pub Date : 2015-09-10DOI: 10.1109/ICSOEB.2015.7244939
K. Asano
Fiber-reinforced aluminum alloy composites were fabricated by squeeze casting, and the effects of the fiber reinforcement on the machinability of the alloy were investigated. Al-Si-Cu-Ni-Mg alloy was used as the matrix metal, and two kinds of short alumina fibers were used as the reinforcements. The cutting force values of the alloy were reduced by the fiber reinforcement under every cutting condition. The lower the hardness of the fiber in the composite was, the lower the cutting force of the composite was. The roughness of the machined surface decreased by the fiber reinforcement. This result and the in situ observation of cutting process revealed that the fibers in the composite suppress the formation of the built-up edge. The observation of chip forms indicated that the fibers in the composite facilitated the shear deformation of the chips because the fibers were easily sheared by the cutting. Continuous chips were formed after cutting the unreinforced alloy, while serrated chips were formed after cutting the composites. The lower the hardness of the fiber in the composite was, the lower the tool wear was.
{"title":"Turning machinability of short alumina fiber reinforced aluminum alloy composites","authors":"K. Asano","doi":"10.1109/ICSOEB.2015.7244939","DOIUrl":"https://doi.org/10.1109/ICSOEB.2015.7244939","url":null,"abstract":"Fiber-reinforced aluminum alloy composites were fabricated by squeeze casting, and the effects of the fiber reinforcement on the machinability of the alloy were investigated. Al-Si-Cu-Ni-Mg alloy was used as the matrix metal, and two kinds of short alumina fibers were used as the reinforcements. The cutting force values of the alloy were reduced by the fiber reinforcement under every cutting condition. The lower the hardness of the fiber in the composite was, the lower the cutting force of the composite was. The roughness of the machined surface decreased by the fiber reinforcement. This result and the in situ observation of cutting process revealed that the fibers in the composite suppress the formation of the built-up edge. The observation of chip forms indicated that the fibers in the composite facilitated the shear deformation of the chips because the fibers were easily sheared by the cutting. Continuous chips were formed after cutting the unreinforced alloy, while serrated chips were formed after cutting the composites. The lower the hardness of the fiber in the composite was, the lower the tool wear was.","PeriodicalId":275696,"journal":{"name":"2015 International Conference on Solar Energy and Building (ICSoEB)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132282994","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}
Pub Date : 2015-09-10DOI: 10.1109/ICSOEB.2015.7244948
Luis Guilherme Monteiro Oliveira, Rafael Isaac dos Santos, Lucas Bacha Pereira Horta, Wilson Negrão Macêdo, João Tavares Pinho, S. Rocha Silva, Eduardo Nohme, Igor Carvalho Finelli, Bruno Marciano Lopes
This paper approaches the computational implementation in MATLAB® R2013a of mathematical models proposed by Lorenzo, De Soto and Mermound & Lejeune, that describes the behavior of photovoltaic modules. These models were implemented and validated using real measured data from different technologies (under distinct operating conditions) provided by UFPA's - GEDAE group, located in North of Brazil, together with statistic methods.
本文探讨了Lorenzo, De Soto和Mermound & Lejeune提出的描述光伏组件行为的数学模型在MATLAB®R2013a中的计算实现。这些模型是利用位于巴西北部的UFPA - GEDAE集团提供的不同技术(在不同操作条件下)的实际测量数据以及统计方法来实施和验证的。
{"title":"Computational implementation of photovoltaic modules mathematical models for software application to estimate PV systems energy production","authors":"Luis Guilherme Monteiro Oliveira, Rafael Isaac dos Santos, Lucas Bacha Pereira Horta, Wilson Negrão Macêdo, João Tavares Pinho, S. Rocha Silva, Eduardo Nohme, Igor Carvalho Finelli, Bruno Marciano Lopes","doi":"10.1109/ICSOEB.2015.7244948","DOIUrl":"https://doi.org/10.1109/ICSOEB.2015.7244948","url":null,"abstract":"This paper approaches the computational implementation in MATLAB® R2013a of mathematical models proposed by Lorenzo, De Soto and Mermound & Lejeune, that describes the behavior of photovoltaic modules. These models were implemented and validated using real measured data from different technologies (under distinct operating conditions) provided by UFPA's - GEDAE group, located in North of Brazil, together with statistic methods.","PeriodicalId":275696,"journal":{"name":"2015 International Conference on Solar Energy and Building (ICSoEB)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127167009","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}
Pub Date : 2015-09-10DOI: 10.1109/ICSOEB.2015.7244949
Safa Bouhajar, S. Belghith, E. Maherzi, M. Besbes
The principle purpose of this paper is to integrate the generalized predictive control (GPC) in the new methodologies of synthesis of a PID controller. The GPC control is also integrated in the synthesis of state feedback control; the optimal control problem for the predictive state feedback control is reformulated in terms of linear matrix inequalities (LMIs). The both control theories are applied in the control of a bioreactor system with multi-model representation around different operating points and the obtained simulation results are compared. The advantage of the proposed PID approach is the simplicity of implementation in real-time processing.
{"title":"Comparison between predictive PID control and predictive state feedback via LMI approach for bioreactor control","authors":"Safa Bouhajar, S. Belghith, E. Maherzi, M. Besbes","doi":"10.1109/ICSOEB.2015.7244949","DOIUrl":"https://doi.org/10.1109/ICSOEB.2015.7244949","url":null,"abstract":"The principle purpose of this paper is to integrate the generalized predictive control (GPC) in the new methodologies of synthesis of a PID controller. The GPC control is also integrated in the synthesis of state feedback control; the optimal control problem for the predictive state feedback control is reformulated in terms of linear matrix inequalities (LMIs). The both control theories are applied in the control of a bioreactor system with multi-model representation around different operating points and the obtained simulation results are compared. The advantage of the proposed PID approach is the simplicity of implementation in real-time processing.","PeriodicalId":275696,"journal":{"name":"2015 International Conference on Solar Energy and Building (ICSoEB)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132460278","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}
Pub Date : 2015-09-10DOI: 10.1109/ICSOEB.2015.7244945
A. ben Daly, M. Maaref, F. Bernardot, T. Barisien, C. Testelin, É. Galopin, A. Lemaître
Exciton spin relaxation in self-assembled InAIAs quantum dots (QDs) was investigated by pump-probe under resonant conditions. Time-resolved photoluminescence and resonant pump-probe were performed, at variable temperature. At low temperature, a long-spin relaxation time has been measured, in agreement with the OD zero-dimensional confinement and the quenching of the relaxation mechanisms. When the temperature increases, the thermal activation of carriers becomes dominant and the spin relaxation increases.
{"title":"Long spin relaxation in self-assembled inalas quantum dots observed by pump-probe experiment","authors":"A. ben Daly, M. Maaref, F. Bernardot, T. Barisien, C. Testelin, É. Galopin, A. Lemaître","doi":"10.1109/ICSOEB.2015.7244945","DOIUrl":"https://doi.org/10.1109/ICSOEB.2015.7244945","url":null,"abstract":"Exciton spin relaxation in self-assembled InAIAs quantum dots (QDs) was investigated by pump-probe under resonant conditions. Time-resolved photoluminescence and resonant pump-probe were performed, at variable temperature. At low temperature, a long-spin relaxation time has been measured, in agreement with the OD zero-dimensional confinement and the quenching of the relaxation mechanisms. When the temperature increases, the thermal activation of carriers becomes dominant and the spin relaxation increases.","PeriodicalId":275696,"journal":{"name":"2015 International Conference on Solar Energy and Building (ICSoEB)","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133935801","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}
Pub Date : 2015-09-10DOI: 10.1109/ICSOEB.2015.7244944
A. Kumar, Thomas Cermak
This paper discusses a new and simple method for voltage regulation of isolated Six-Phase Self-Excited Induction Generator (SPSEIG) fed VSI driven by wind turbine under unbalanced and non-linear loading conditions. The proposed scheme consists of a wind turbine, SPSEIG, Rectifier and IGBT based voltage source inverter, which keeps the generated voltage constant despite the change in the connected load. The modulation index of the proposed inverter is adjusted to obtain a constant output voltage. A mathematical model of the SPSEIG with this regulator supplying different types of loads is derived for studying the behavior of the system under transient and dynamic conditions. Simulation results are used to demonstrate the validity of the proposed scheme.
{"title":"A novel method of voltage regulation of isolated six-phase self-excited induction generator fed VSI driven by wind turbine","authors":"A. Kumar, Thomas Cermak","doi":"10.1109/ICSOEB.2015.7244944","DOIUrl":"https://doi.org/10.1109/ICSOEB.2015.7244944","url":null,"abstract":"This paper discusses a new and simple method for voltage regulation of isolated Six-Phase Self-Excited Induction Generator (SPSEIG) fed VSI driven by wind turbine under unbalanced and non-linear loading conditions. The proposed scheme consists of a wind turbine, SPSEIG, Rectifier and IGBT based voltage source inverter, which keeps the generated voltage constant despite the change in the connected load. The modulation index of the proposed inverter is adjusted to obtain a constant output voltage. A mathematical model of the SPSEIG with this regulator supplying different types of loads is derived for studying the behavior of the system under transient and dynamic conditions. Simulation results are used to demonstrate the validity of the proposed scheme.","PeriodicalId":275696,"journal":{"name":"2015 International Conference on Solar Energy and Building (ICSoEB)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133736279","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}
Pub Date : 2015-09-10DOI: 10.1109/ICSOEB.2015.7244940
C. Rodrigues, S. Figueiredo, Jefferson Santos, L. Santos, Bartosz Zucowski
Biomass-based energy represents an increasing relevance in the Brazilian energy matrix, representing 24 % of the Brazilian overall energy production in 2012. Besides the amount of the energy obtained, its qualitative aspect is as much as important, as it is accounted in the renewable energy share. Considering the Brazilian agricultural activity, the energy production from biomass can be still significantly increased and energy cogeneration from biomass burning is one of the process that contributes to support this grow. As an example, almost all of the more than 500 sugar cane mills in Brazil burn the sugar cane bagasse to generate electrical energy. The main waste from the energy cogeneration is the biomass ash, a mix of mineral compounds and remained carbon-based components. Portland cements and concretes are the most widely used manufactured materials in the world, consuming large quantities of raw materials and energy and being responsible for a significant share of the CO2 emissions. One of the main strategies to reduce the environmental impacts from cement production is to combine the cement clinker to supplementary cement materials (SCM), resulting in blended cements. This paper focus on the potential of biomass ashes resulted from the energy cogeneration as SCM in cement-based materials. There are presented results from research in which sugarcane bagasse ash (SCBA) are used as SCM, resulted in cement composites and concretes with improved properties.
{"title":"Co-generation biomass wastes in low Co2 cement composites and concretes: Combining energy efficiency and technical performance in sustainable building materials","authors":"C. Rodrigues, S. Figueiredo, Jefferson Santos, L. Santos, Bartosz Zucowski","doi":"10.1109/ICSOEB.2015.7244940","DOIUrl":"https://doi.org/10.1109/ICSOEB.2015.7244940","url":null,"abstract":"Biomass-based energy represents an increasing relevance in the Brazilian energy matrix, representing 24 % of the Brazilian overall energy production in 2012. Besides the amount of the energy obtained, its qualitative aspect is as much as important, as it is accounted in the renewable energy share. Considering the Brazilian agricultural activity, the energy production from biomass can be still significantly increased and energy cogeneration from biomass burning is one of the process that contributes to support this grow. As an example, almost all of the more than 500 sugar cane mills in Brazil burn the sugar cane bagasse to generate electrical energy. The main waste from the energy cogeneration is the biomass ash, a mix of mineral compounds and remained carbon-based components. Portland cements and concretes are the most widely used manufactured materials in the world, consuming large quantities of raw materials and energy and being responsible for a significant share of the CO2 emissions. One of the main strategies to reduce the environmental impacts from cement production is to combine the cement clinker to supplementary cement materials (SCM), resulting in blended cements. This paper focus on the potential of biomass ashes resulted from the energy cogeneration as SCM in cement-based materials. There are presented results from research in which sugarcane bagasse ash (SCBA) are used as SCM, resulted in cement composites and concretes with improved properties.","PeriodicalId":275696,"journal":{"name":"2015 International Conference on Solar Energy and Building (ICSoEB)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131330415","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}
Pub Date : 2015-09-10DOI: 10.1109/ICSOEB.2015.7244943
Hajer Al Yammahi, A. Ai-Hinai
Future smart microgrids need increased flexibility and intelligence in control and optimization to maintain a generation-load balance. This concern becomes more significant today because of lack of conventional Automatic Generation Control (AGC) and spinning reserves which introduce new issues for providing ancillary services. Moreover, due to increasing renewable energy penetration in power systems, conventional controllers may be unable to maintain the system stability. In response to this issue, this paper presents an intelligent control algorithm using fuzzy logic and particle swarm optimization (PSO). Furthermore, the effect of Demand Response (DR) in continuously balancing generation and demand, when the output from wind and photovoltaic (PV) varies naturally, is proposed. Simulation results are examined on an islanded microgrid case study. The performance of the proposed controller is compared with conventional control design and the effect of DR in fast power compensation is proved.
{"title":"Intelligent frequency control using optimal tuning and demand response in an AC microgrid","authors":"Hajer Al Yammahi, A. Ai-Hinai","doi":"10.1109/ICSOEB.2015.7244943","DOIUrl":"https://doi.org/10.1109/ICSOEB.2015.7244943","url":null,"abstract":"Future smart microgrids need increased flexibility and intelligence in control and optimization to maintain a generation-load balance. This concern becomes more significant today because of lack of conventional Automatic Generation Control (AGC) and spinning reserves which introduce new issues for providing ancillary services. Moreover, due to increasing renewable energy penetration in power systems, conventional controllers may be unable to maintain the system stability. In response to this issue, this paper presents an intelligent control algorithm using fuzzy logic and particle swarm optimization (PSO). Furthermore, the effect of Demand Response (DR) in continuously balancing generation and demand, when the output from wind and photovoltaic (PV) varies naturally, is proposed. Simulation results are examined on an islanded microgrid case study. The performance of the proposed controller is compared with conventional control design and the effect of DR in fast power compensation is proved.","PeriodicalId":275696,"journal":{"name":"2015 International Conference on Solar Energy and Building (ICSoEB)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123442391","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}
Pub Date : 2015-09-10DOI: 10.1109/ICSOEB.2015.7244942
H. Sammouda, T. Ben Mbarek
In this work it was carried out a numerical simulation of the injection of wood fibers in a plastic matrix to obtain a composite material wood/WPC noted plastic. After injection, in a second step, it will focus on the determination of the mechanical properties under various stresses (bending, tension, charge and discharge). We can able to exploit the results obtained after validation from literature. In particular, it has been able to value the effects of different characteristic parameters of the strengthening of a specific material rate injected fibers. So we drew some interesting scientific conclusions for composite materials.
{"title":"Prediction by numerical simulation of the mechanical behavior of structures abutting composite wood/plastic (Wood plastic composite-WPC)","authors":"H. Sammouda, T. Ben Mbarek","doi":"10.1109/ICSOEB.2015.7244942","DOIUrl":"https://doi.org/10.1109/ICSOEB.2015.7244942","url":null,"abstract":"In this work it was carried out a numerical simulation of the injection of wood fibers in a plastic matrix to obtain a composite material wood/WPC noted plastic. After injection, in a second step, it will focus on the determination of the mechanical properties under various stresses (bending, tension, charge and discharge). We can able to exploit the results obtained after validation from literature. In particular, it has been able to value the effects of different characteristic parameters of the strengthening of a specific material rate injected fibers. So we drew some interesting scientific conclusions for composite materials.","PeriodicalId":275696,"journal":{"name":"2015 International Conference on Solar Energy and Building (ICSoEB)","volume":"455 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117006519","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}
Pub Date : 2015-09-10DOI: 10.1109/ICSOEB.2015.7244947
Habbachi Fatma, Afif El Kafsi, F. Oueslati
3D Natural convection in partially porous media. The Study focused on transfers and flow in porous media in nonequilibrium. Darcy-Brinkman model's is adopted. Moreover the two-equation model is used to separately account for the local fluid and solid temperatures. A numerical method based on the finite volume method a full multigrid technique is employed. We find the impact of the conductivities ratio on the flow and the heat transfer.
{"title":"Study of transfer and flow in porous media in nonequilibrium","authors":"Habbachi Fatma, Afif El Kafsi, F. Oueslati","doi":"10.1109/ICSOEB.2015.7244947","DOIUrl":"https://doi.org/10.1109/ICSOEB.2015.7244947","url":null,"abstract":"3D Natural convection in partially porous media. The Study focused on transfers and flow in porous media in nonequilibrium. Darcy-Brinkman model's is adopted. Moreover the two-equation model is used to separately account for the local fluid and solid temperatures. A numerical method based on the finite volume method a full multigrid technique is employed. We find the impact of the conductivities ratio on the flow and the heat transfer.","PeriodicalId":275696,"journal":{"name":"2015 International Conference on Solar Energy and Building (ICSoEB)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121178136","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}
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