Pub Date : 2022-12-13DOI: 10.1109/IREC56325.2022.10002104
Imen Chikha, Y. Bouzidi, N. Tazi, S. Baklouti, R. Idir
Over the past two decades, the wind turbine industry has grown rapidly. As a result, thousands of tons of composite materials from these end-of-life (EoL) wind turbine blades (WTBs) are discarded every year. Due to their three-dimensional structure, which consists of a thermoset matrix and mainly glass fibers (GF), their recovery is a challenge. The objective of this study is to compare several recycling technologies for composite materials using landfill as a baseline scenario. Several aspects can influence the performance of plastic composite recycling, but one of the most important is the efficiency of recycling technologies in terms of the recovered glass fiber rate. To evaluate this amount of fiber annually, a material flow analysis (MFA) was performed using 2023 as the study year. A correlation with other aspects was established in order to perform a multi-criteria approach based on maturity level, technical, economic and environmental aspects. These criteria are the Technology Readiness (TRL), cost, energy demand and retained tensile strength
{"title":"Comparative study between different valorization methods of glass fiber waste from end-of-life wind turbine blades","authors":"Imen Chikha, Y. Bouzidi, N. Tazi, S. Baklouti, R. Idir","doi":"10.1109/IREC56325.2022.10002104","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10002104","url":null,"abstract":"Over the past two decades, the wind turbine industry has grown rapidly. As a result, thousands of tons of composite materials from these end-of-life (EoL) wind turbine blades (WTBs) are discarded every year. Due to their three-dimensional structure, which consists of a thermoset matrix and mainly glass fibers (GF), their recovery is a challenge. The objective of this study is to compare several recycling technologies for composite materials using landfill as a baseline scenario. Several aspects can influence the performance of plastic composite recycling, but one of the most important is the efficiency of recycling technologies in terms of the recovered glass fiber rate. To evaluate this amount of fiber annually, a material flow analysis (MFA) was performed using 2023 as the study year. A correlation with other aspects was established in order to perform a multi-criteria approach based on maturity level, technical, economic and environmental aspects. These criteria are the Technology Readiness (TRL), cost, energy demand and retained tensile strength","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"2010 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123777403","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 : 2022-12-13DOI: 10.1109/IREC56325.2022.10002063
M. Chaghouri, C. Ciotonea, F. Cazier, L. Tidahy, C. Gennequin, E. Abi-aad
In this study, real biogas produced by anaerobic digestion of organic waste was collected from a landfill. The valorization biogas using the dry reforming of methane was evaluated. For this purpose, Ni2Mg4Al2 catalyst was synthesized using co-precipitation method, calcined and reduced at 800 °C and analyzed using physico-chemical techniques. The efficiency of the sample in the dry reforming was evaluated in a series of 12 h stability tests at 750 °C in the presence of synthetic, clean, and unrefined biogas. The obtained results show a stable activity in all conditions except in the presence of unrefined biogas. Even though the initial conversion rate was above 70%, the activity quickly decreased, and the catalyst was completely deactivated after 2 h on stream. Using the thermal analysis of the used samples, no carbon was detected for this catalyst, proving that it was not the cause of the deactivation. However, XRD results showed a lack of reduced Ni species in this catalyst, suggesting that the deactivation may be due to the reoxidation of the active phase. In further studies, it would be interesting to work on developing a catalytic material resistant to oxidation in order to extend its shelf-life.
{"title":"Hydrogen production through dry reforming of biogas on hydrotalcite derived materials","authors":"M. Chaghouri, C. Ciotonea, F. Cazier, L. Tidahy, C. Gennequin, E. Abi-aad","doi":"10.1109/IREC56325.2022.10002063","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10002063","url":null,"abstract":"In this study, real biogas produced by anaerobic digestion of organic waste was collected from a landfill. The valorization biogas using the dry reforming of methane was evaluated. For this purpose, Ni2Mg4Al2 catalyst was synthesized using co-precipitation method, calcined and reduced at 800 °C and analyzed using physico-chemical techniques. The efficiency of the sample in the dry reforming was evaluated in a series of 12 h stability tests at 750 °C in the presence of synthetic, clean, and unrefined biogas. The obtained results show a stable activity in all conditions except in the presence of unrefined biogas. Even though the initial conversion rate was above 70%, the activity quickly decreased, and the catalyst was completely deactivated after 2 h on stream. Using the thermal analysis of the used samples, no carbon was detected for this catalyst, proving that it was not the cause of the deactivation. However, XRD results showed a lack of reduced Ni species in this catalyst, suggesting that the deactivation may be due to the reoxidation of the active phase. In further studies, it would be interesting to work on developing a catalytic material resistant to oxidation in order to extend its shelf-life.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"337 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131987656","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 : 2022-12-13DOI: 10.1109/IREC56325.2022.10001866
Komlan H. S. Tete, Y. Soro, S. Sidibé, Rory Jones
Although the residential sector is responsible for almost one-third of electricity consumption in Burkina Faso, very little information and details on actual electricity use and households' behaviours in relation with it exist because research on residential sector electricity use remains very poor. This study addresses this research gap by conducting a residential electricity consumption survey within 387 households in the city of Ouagadougou, Burkina Faso. To the authors' knowledge this is the first large-scale, city-wide household electricity study undertaken in Burkina Faso. Information on the households' socio-demographic characteristics, behaviours, and patterns of electricity use were collected to provide insights into the actual city-scale residential electricity use. Findings showed that households use, on average, 2395 kWh/year. Cooling accounts for 39.9% of the total electricity use, followed by cooking/food preserving (22.7%) and information-communication-entertainment (19.1%) activities. The study’s findings could be used by researchers, energy actors and households to better understand actual electricity use patterns in a city and country where a paucity of data currently exists as well as to identify ways to modify consumption patterns to reduce power outages and improve the living conditions of households.
{"title":"Interactions between residential electricity consumption and urban households' lifestyle and behaviour in Burkina Faso: Findings from a survey","authors":"Komlan H. S. Tete, Y. Soro, S. Sidibé, Rory Jones","doi":"10.1109/IREC56325.2022.10001866","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10001866","url":null,"abstract":"Although the residential sector is responsible for almost one-third of electricity consumption in Burkina Faso, very little information and details on actual electricity use and households' behaviours in relation with it exist because research on residential sector electricity use remains very poor. This study addresses this research gap by conducting a residential electricity consumption survey within 387 households in the city of Ouagadougou, Burkina Faso. To the authors' knowledge this is the first large-scale, city-wide household electricity study undertaken in Burkina Faso. Information on the households' socio-demographic characteristics, behaviours, and patterns of electricity use were collected to provide insights into the actual city-scale residential electricity use. Findings showed that households use, on average, 2395 kWh/year. Cooling accounts for 39.9% of the total electricity use, followed by cooking/food preserving (22.7%) and information-communication-entertainment (19.1%) activities. The study’s findings could be used by researchers, energy actors and households to better understand actual electricity use patterns in a city and country where a paucity of data currently exists as well as to identify ways to modify consumption patterns to reduce power outages and improve the living conditions of households.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115127825","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 : 2022-12-13DOI: 10.1109/IREC56325.2022.10002078
R. Djebali, M. Ferhi
Improving heat transfer is a challenging area of research. In recent years, new ideas have continuously emerged on this subject. Microchannels and microcavities have proven better heat transfer efficiency [1-3]. The present study aims to analyze the magnetohydrodynamics (MHD) heat transfer enhancement and entropy generation in a micro open tall cavity filled with nanoliquid under the effects of uniform magnetic field and bottom sinusoidal heating in the slip flow regime. A mesoscopic numerical analysis based on the SRT-BGK lattice Boltzmann numerical method (LBM) is used to resolve the governing equations with boundary conditions special treatment. The slip velocity and the temperature jump conditions are used to incorporate the micro aspect. The flow pattern, heat transfer characteristics and the irreversibility pattern are studied dependently on various dimensionless independent monitoring parameters in a set of ranges, namely: Rayleigh number (Ra) (102-104), Knudsen number (Kn) (0-0.1) and Hartmann number (Ha) (0-80), nanosuspensions volume fraction Vf (0-0.04%) as well as the magnitude A (0-1) and wave length parameter f of the sinusoidal heating function T(x) =A sin(fx/L), 1≤f=2πL/λ≤9 and λ is the signal wavelength.
改善传热是一个具有挑战性的研究领域。近年来，关于这个问题的新观点不断涌现。微通道和微腔被证明具有更好的传热效率[1-3]。本文研究了在均匀磁场和底部正弦加热的作用下，填充纳米液体的微开口高腔在滑移流态下的磁流体力学强化传热和熵产。采用基于SRT-BGK晶格玻尔兹曼数值方法(LBM)的细观数值分析方法求解了边界条件特殊处理的控制方程。采用滑移速度和温度跳变条件来考虑微观方面的影响。在Rayleigh数(Ra)(102-104)、Knudsen数(Kn)(0-0.1)、Hartmann数(Ha)(0-80)、纳米悬浮液体积分数Vf(0-0.04%)、正弦加热函数的数量级a(0-1)和波长参数f (T(x) = a sin(fx/L)， 1≤f=2πL/λ≤9，λ为信号波长)等一系列范围内，依靠各种无量次独立监测参数研究了流动模式、换热特性和不可逆模式。
{"title":"Appraising heat transfer enhancement by nanofluid and entropy generation minimization in a micro tall cavity: : Magnetic field and sinusoidal heating effects","authors":"R. Djebali, M. Ferhi","doi":"10.1109/IREC56325.2022.10002078","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10002078","url":null,"abstract":"Improving heat transfer is a challenging area of research. In recent years, new ideas have continuously emerged on this subject. Microchannels and microcavities have proven better heat transfer efficiency [1-3]. The present study aims to analyze the magnetohydrodynamics (MHD) heat transfer enhancement and entropy generation in a micro open tall cavity filled with nanoliquid under the effects of uniform magnetic field and bottom sinusoidal heating in the slip flow regime. A mesoscopic numerical analysis based on the SRT-BGK lattice Boltzmann numerical method (LBM) is used to resolve the governing equations with boundary conditions special treatment. The slip velocity and the temperature jump conditions are used to incorporate the micro aspect. The flow pattern, heat transfer characteristics and the irreversibility pattern are studied dependently on various dimensionless independent monitoring parameters in a set of ranges, namely: Rayleigh number (Ra) (102-104), Knudsen number (Kn) (0-0.1) and Hartmann number (Ha) (0-80), nanosuspensions volume fraction Vf (0-0.04%) as well as the magnitude A (0-1) and wave length parameter f of the sinusoidal heating function T(x) =A sin(fx/L), 1≤f=2πL/λ≤9 and λ is the signal wavelength.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117189809","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 : 2022-12-13DOI: 10.1109/IREC56325.2022.10002061
Asma Alfergani, Abrar Ali Ahmed, Farhat M. Shaltami, Ashraf Kahlil, F. Mohamed
In this paper, the design and stability of three-phase inverter is tested experimentally and evaluated using simulation. The voltage control loop is implemented in the dq reference frame which contains two proportional- integral (PI) controller. The PI controller is used to regulate the voltage of the three-phase inverter. Arduino is used to implement the PI controller of voltage control loop. Multi objective Practical Swarm optimization (MOPSO) is used to derive the optimum value of the PI controller gains which are then tested using simulation. The simulation and practical results show the stable operation of the voltage of the three-phase inverter.
{"title":"Design and Implementation of Three-Phase Inverter using MOPSO","authors":"Asma Alfergani, Abrar Ali Ahmed, Farhat M. Shaltami, Ashraf Kahlil, F. Mohamed","doi":"10.1109/IREC56325.2022.10002061","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10002061","url":null,"abstract":"In this paper, the design and stability of three-phase inverter is tested experimentally and evaluated using simulation. The voltage control loop is implemented in the dq reference frame which contains two proportional- integral (PI) controller. The PI controller is used to regulate the voltage of the three-phase inverter. Arduino is used to implement the PI controller of voltage control loop. Multi objective Practical Swarm optimization (MOPSO) is used to derive the optimum value of the PI controller gains which are then tested using simulation. The simulation and practical results show the stable operation of the voltage of the three-phase inverter.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133685309","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 : 2022-12-13DOI: 10.1109/IREC56325.2022.10001863
L. Brendel
Financial viability has a significant impact on the market penetration for most technologies. Thus, researchers conduct techno-economic assessments. Frequently, these employ many input parameters, several of which are both difficult to estimate and subject to unpredictable changes of the economy. The utility of techno-economic studies is therefore reduced for readers, since sensitivity of the results to changes of the input parameters remains hidden in the model. This paper proposes a generalized method and exercises it with a model for renewable energy driven desalination. The method is simple to apply but could make techno-economic assessments more informative and transparent. For the evaluated model, the main financial indicator is chosen to be the margin of levelized cost of water for renewable energy driven desalination over a reference process. Only six parameters change the main indicator by more than 1.5% given an absolute change of the input of 0.05. The final graph shows, that even in the worst-case scenario created in a combined parametric study, wind driven desalination is cost competitive for electricity prices greater than 6 cent per kWh. Desalination driven by photovoltaic produces water cheaper than the reference process for most scenarios but may be inferior at low electricity prices.
{"title":"Economic Uncertainty Analysis for Renewable Energy Driven Desalination","authors":"L. Brendel","doi":"10.1109/IREC56325.2022.10001863","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10001863","url":null,"abstract":"Financial viability has a significant impact on the market penetration for most technologies. Thus, researchers conduct techno-economic assessments. Frequently, these employ many input parameters, several of which are both difficult to estimate and subject to unpredictable changes of the economy. The utility of techno-economic studies is therefore reduced for readers, since sensitivity of the results to changes of the input parameters remains hidden in the model. This paper proposes a generalized method and exercises it with a model for renewable energy driven desalination. The method is simple to apply but could make techno-economic assessments more informative and transparent. For the evaluated model, the main financial indicator is chosen to be the margin of levelized cost of water for renewable energy driven desalination over a reference process. Only six parameters change the main indicator by more than 1.5% given an absolute change of the input of 0.05. The final graph shows, that even in the worst-case scenario created in a combined parametric study, wind driven desalination is cost competitive for electricity prices greater than 6 cent per kWh. Desalination driven by photovoltaic produces water cheaper than the reference process for most scenarios but may be inferior at low electricity prices.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131366505","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 : 2022-12-13DOI: 10.1109/IREC56325.2022.10002002
Amira Dellagi, Rabeb Ayed, S. Bouadila, A. Guizani
Phase change materials (PCM) have great potential for use in modern building materials to stabilize indoor temperature fluctuations to improve thermal comfort without increasing energy consumption. This paper investigates the thermal performance and impact of PCM inserted inside the enclosures of the bricks via heat transfer analysis of a building brick under summer dominant conditions. A time-dependent simulation of a 3D brick model, incorporating the PCM, has been developed for numerical investigation.
{"title":"Study of the thermal behavior of a heated brick containing a phase change material","authors":"Amira Dellagi, Rabeb Ayed, S. Bouadila, A. Guizani","doi":"10.1109/IREC56325.2022.10002002","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10002002","url":null,"abstract":"Phase change materials (PCM) have great potential for use in modern building materials to stabilize indoor temperature fluctuations to improve thermal comfort without increasing energy consumption. This paper investigates the thermal performance and impact of PCM inserted inside the enclosures of the bricks via heat transfer analysis of a building brick under summer dominant conditions. A time-dependent simulation of a 3D brick model, incorporating the PCM, has been developed for numerical investigation.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122298483","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 : 2022-12-13DOI: 10.1109/IREC56325.2022.10001958
Ahmad T. Abu Dyak, Suad S. Al Mattar, Mamoun Shehadeh, A. Harb
This paper presents a comprehensive simulation study for Jordanian power system stability subjected to applied disturbances. In addition, feasibility of flexibility solutions will be investigated on the studied Jordanian grid. The study is carried out at various scenarios that are reflecting grid conditions for load (peak and low load) and high-renewable integration condition. The response of the power system after applied event and grid behavior is observed. The variations of the studied system operating points have also been outlined. In all cases, the simulations are conducted using the complete Jordanian dynamical model. It is concluded that the power system can withstand up to a limit the amount of Renewable Energy Sources (RES) integration in system running load conditions. It is worth mentioning that not only load status affects the operating conditions of system with high-RES integration but also It is largely dependent on the interconnection status with neighboring countries.
{"title":"On the Effect of High Renewable Energy Penetration with Jordanian Electrical Power Grid","authors":"Ahmad T. Abu Dyak, Suad S. Al Mattar, Mamoun Shehadeh, A. Harb","doi":"10.1109/IREC56325.2022.10001958","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10001958","url":null,"abstract":"This paper presents a comprehensive simulation study for Jordanian power system stability subjected to applied disturbances. In addition, feasibility of flexibility solutions will be investigated on the studied Jordanian grid. The study is carried out at various scenarios that are reflecting grid conditions for load (peak and low load) and high-renewable integration condition. The response of the power system after applied event and grid behavior is observed. The variations of the studied system operating points have also been outlined. In all cases, the simulations are conducted using the complete Jordanian dynamical model. It is concluded that the power system can withstand up to a limit the amount of Renewable Energy Sources (RES) integration in system running load conditions. It is worth mentioning that not only load status affects the operating conditions of system with high-RES integration but also It is largely dependent on the interconnection status with neighboring countries.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126198710","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 : 2022-12-13DOI: 10.1109/IREC56325.2022.10002011
Sara Baddadi, Rabeb Ayed, S. Bouadila
The interest of using renewable energy sources for greenhouse heating is actually high because of the intensive heating loads of these shelters. Among the important alternative sources of energy are solar collectors. For this purpose, this study investigates the heating of a Hydroponic Greenhouse, Hyd_G (3 m × 3 m × 8 m) by a Multi-Stage Exchanger Heating System, MSEHS. This system was designed and realized in order to mitigate the thermal stratification inside the hydroponic greenhouse and subsequently improve the harvests quality. The required heating loads of the greenhouse were determined and the mentioned alternative energy system was sized and then constructed according to the dimensioning. Experiments were conducted extensively during the winter period.
使用可再生能源为温室供暖的兴趣实际上很高，因为这些庇护所的热负荷很大。太阳能集热器是重要的替代能源之一。为此，本研究对水培温室Hyd_G (3 m × 3 m × 8 m)的多级交换加热系统MSEHS进行了研究。该系统的设计和实现是为了缓解水培温室内部的热分层，从而提高收获质量。确定了温室所需的热负荷，确定了替代能源系统的尺寸，并根据尺寸进行了构建。在冬季进行了大量的试验。
{"title":"Harnessing solar energy for homogeneous spatial variability of a greenhouse air temperature:System design and implementation","authors":"Sara Baddadi, Rabeb Ayed, S. Bouadila","doi":"10.1109/IREC56325.2022.10002011","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10002011","url":null,"abstract":"The interest of using renewable energy sources for greenhouse heating is actually high because of the intensive heating loads of these shelters. Among the important alternative sources of energy are solar collectors. For this purpose, this study investigates the heating of a Hydroponic Greenhouse, Hyd_G (3 m × 3 m × 8 m) by a Multi-Stage Exchanger Heating System, MSEHS. This system was designed and realized in order to mitigate the thermal stratification inside the hydroponic greenhouse and subsequently improve the harvests quality. The required heating loads of the greenhouse were determined and the mentioned alternative energy system was sized and then constructed according to the dimensioning. Experiments were conducted extensively during the winter period.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125602623","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 : 2022-12-13DOI: 10.1109/IREC56325.2022.10002082
Hiba Helali, A. Khedher
The Smart Distribution Grid (SDG) applications have a high potential to improve the power system performance under the high penetration of distributed energy resources. Nevertheless, the conventional transformer (CT), which is the most important component of the distribution system, cannot fulfill the SDG requirement. In this regard, the modular smart transformer (ST) has emerged as a promising alternative to CT in the SDG. The structure of this transformer includes power conversion stages and multiple DC buses on the Medium Voltage (MV) and Low Voltage (LV) sides. This paper proposes an ST model based on a five-level Cascaded H-Bridge (CHB) rectifier in the MV AC-DC power conversion stage, six dual active bridge converters in the high-frequency DC-DC power conversion stage, a three-phase four-leg inverter in the LV DC-AC power conversion stage, and six DC buses on the MV and LV side, for SDG applications. The use of the four-leg inverter in the ST model enables to improve the quality of the grid voltage, minimize the neutral current and provide power supply for a three-phase or single-phase load. Moreover, a voltage balance control for the CHB rectifier is presented in this paper to eliminate the voltage unbalance problems in DC buses and improve the ST performance. Finally, the simulation results verify the good performance of the proposed control system.
{"title":"Voltage Balance Control of Five-Level Cascaded H-Bridge Rectifier-Based Smart Transformer","authors":"Hiba Helali, A. Khedher","doi":"10.1109/IREC56325.2022.10002082","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10002082","url":null,"abstract":"The Smart Distribution Grid (SDG) applications have a high potential to improve the power system performance under the high penetration of distributed energy resources. Nevertheless, the conventional transformer (CT), which is the most important component of the distribution system, cannot fulfill the SDG requirement. In this regard, the modular smart transformer (ST) has emerged as a promising alternative to CT in the SDG. The structure of this transformer includes power conversion stages and multiple DC buses on the Medium Voltage (MV) and Low Voltage (LV) sides. This paper proposes an ST model based on a five-level Cascaded H-Bridge (CHB) rectifier in the MV AC-DC power conversion stage, six dual active bridge converters in the high-frequency DC-DC power conversion stage, a three-phase four-leg inverter in the LV DC-AC power conversion stage, and six DC buses on the MV and LV side, for SDG applications. The use of the four-leg inverter in the ST model enables to improve the quality of the grid voltage, minimize the neutral current and provide power supply for a three-phase or single-phase load. Moreover, a voltage balance control for the CHB rectifier is presented in this paper to eliminate the voltage unbalance problems in DC buses and improve the ST performance. Finally, the simulation results verify the good performance of the proposed control system.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121699092","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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