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/IREC56325.2022.10002011
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/IREC56325.2022.10001922
N. Ould Cherchali, M. R. Skender, B. Bentchikou, A. Tlemçani, A. Morsli
Solar cells are the basic structures of photovoltaic systems and solar energy conversion. Solar cell/module modeling involves the formulation of thenon-linear current versus voltage (I-V) curve. Determination of parameters plays an important role in solar cell/module modeling. This study concerns the extraction of five parameters of a solar cell with single diode, by using the new algorithm named firefly Algorithm (FA) for identification of these parameters based on the current-voltage characteristic. The found parameter values are compared with other algorithms swarm of particles (PSO) and the genetic algorithm (GA) based on the same data.
{"title":"Parametric identification of a photovoltaic panel by the Firefly algorithm","authors":"N. Ould Cherchali, M. R. Skender, B. Bentchikou, A. Tlemçani, A. Morsli","doi":"10.1109/IREC56325.2022.10001922","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10001922","url":null,"abstract":"Solar cells are the basic structures of photovoltaic systems and solar energy conversion. Solar cell/module modeling involves the formulation of thenon-linear current versus voltage (I-V) curve. Determination of parameters plays an important role in solar cell/module modeling. This study concerns the extraction of five parameters of a solar cell with single diode, by using the new algorithm named firefly Algorithm (FA) for identification of these parameters based on the current-voltage characteristic. The found parameter values are compared with other algorithms swarm of particles (PSO) and the genetic algorithm (GA) based on the same data.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"2 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":"134440109","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/IREC56325.2022.10001923
R. Djebali, M. Ferhi
This paper aims to perform heat transfer and entropy generation in a micro medium filled with nanoliquid in the slip flow regime. The case of microchannel is investigated using a mesoscopic numerical analysis. The nanofluid flow is driven along the microchannel by a co- flow at the inlet. Near the top cold wall the flow is induced by a constant velocity (Uin) and hot temperature (TH) but near the bottom heated wall the nanoliquid is driven by a constant velocity (Uin/4) and a cold temperature (TC). The slip velocity and the temperature jump conditions are imposed to the walls. Lattice Boltzmann method was used to solve the obtained governing equation system by means of the SRT-BGK model. Attention was focused on the influence of the emerging input parameters such as Knudsen number (Kn), Reynolds number (Re), nanoparticles diameter (Dp) and volume fraction (Vf) on the heat transfer enhancement and entropy generation minimization throughout this paper. Correlations of heat transfer enhancement and volumetric entropy have been inscribed based on response surface methodology.
{"title":"DOE of heat transfer and entropy generation in channel microheat exchanger driven by a coflow","authors":"R. Djebali, M. Ferhi","doi":"10.1109/IREC56325.2022.10001923","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10001923","url":null,"abstract":"This paper aims to perform heat transfer and entropy generation in a micro medium filled with nanoliquid in the slip flow regime. The case of microchannel is investigated using a mesoscopic numerical analysis. The nanofluid flow is driven along the microchannel by a co- flow at the inlet. Near the top cold wall the flow is induced by a constant velocity (Uin) and hot temperature (TH) but near the bottom heated wall the nanoliquid is driven by a constant velocity (Uin/4) and a cold temperature (TC). The slip velocity and the temperature jump conditions are imposed to the walls. Lattice Boltzmann method was used to solve the obtained governing equation system by means of the SRT-BGK model. Attention was focused on the influence of the emerging input parameters such as Knudsen number (Kn), Reynolds number (Re), nanoparticles diameter (Dp) and volume fraction (Vf) on the heat transfer enhancement and entropy generation minimization throughout this paper. Correlations of heat transfer enhancement and volumetric entropy have been inscribed based on response surface methodology.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"131 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":"122491920","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/IREC56325.2022.10002028
A. Recioui, F. Z. Dekhandji
Conventional power systems are mostly based on fossil fuels. These constitute a substantial source of pollution in addition to being quickly depleted. Isolated areas and communities cannot profit from this type of electric energy for the reason that they are far from the grid. The hybrid renewable energy systems (HRES) have demonstrated to be an excellent solution for such a situation. The purpose of this paper is to design and optimize a standalone hybrid energy system to satisfy the electricity demand for a remote drilling site in Adrar province located in the South of Algeria. To cure the problem of intermittence of the solar and wind sources, a hydrogen-based set up is appended to the hybrid renewable energy system. The simulations are done using HOMER software to determine the optimal the HRES configurations considering techno-economic criteria.
{"title":"Hydrogen-based Hybrid Renewable Energy System Sizing Optimization using HOMER","authors":"A. Recioui, F. Z. Dekhandji","doi":"10.1109/IREC56325.2022.10002028","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10002028","url":null,"abstract":"Conventional power systems are mostly based on fossil fuels. These constitute a substantial source of pollution in addition to being quickly depleted. Isolated areas and communities cannot profit from this type of electric energy for the reason that they are far from the grid. The hybrid renewable energy systems (HRES) have demonstrated to be an excellent solution for such a situation. The purpose of this paper is to design and optimize a standalone hybrid energy system to satisfy the electricity demand for a remote drilling site in Adrar province located in the South of Algeria. To cure the problem of intermittence of the solar and wind sources, a hydrogen-based set up is appended to the hybrid renewable energy system. The simulations are done using HOMER software to determine the optimal the HRES configurations considering techno-economic criteria.","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":"130494039","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/IREC56325.2022.10001944
Y. Mahmoud
Partial shading has serious impact on the efficiency and operation of solar PV systems resulting in significant power losses. Differential Power Processing (DPP) has been found effective in eliminating the impact of partial shading without adding extra power losses. They provide an effective alternative to distributed converters that require processing the entire extracted power scarifying the efficiency. This paper proposes a DPP structure that eliminates the needed voltage sensors for extracting the maximum power tracking. Instead of measuring the power of each individual PV submodule for tracking the maximum power, the proposed approach relies on maximizing the module current participating in eliminating the voltage measurements. Since the voltage of the module’s output is controlled by the output controller and can be considered constant to the faster inner controllers, operating the DPP converters to maximize the current should is demonstrated to maximize the power of the submodules. The effectiveness of the proposed structure is validated by simulation through Simulink under variety of shading scenarios.
{"title":"New Approach for Controlling PV-PV Differential Power Processing Converters","authors":"Y. Mahmoud","doi":"10.1109/IREC56325.2022.10001944","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10001944","url":null,"abstract":"Partial shading has serious impact on the efficiency and operation of solar PV systems resulting in significant power losses. Differential Power Processing (DPP) has been found effective in eliminating the impact of partial shading without adding extra power losses. They provide an effective alternative to distributed converters that require processing the entire extracted power scarifying the efficiency. This paper proposes a DPP structure that eliminates the needed voltage sensors for extracting the maximum power tracking. Instead of measuring the power of each individual PV submodule for tracking the maximum power, the proposed approach relies on maximizing the module current participating in eliminating the voltage measurements. Since the voltage of the module’s output is controlled by the output controller and can be considered constant to the faster inner controllers, operating the DPP converters to maximize the current should is demonstrated to maximize the power of the submodules. The effectiveness of the proposed structure is validated by simulation through Simulink under variety of shading scenarios.","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":"130270985","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/IREC56325.2022.10001974
Khadidja Rahmani, N. Bouaziz
This research focuses on Ksourian models of Algerian country. The proposal work is to check and evaluate thermal performance of old technique, which are derived from the Ksourian model, using simulation tools. The adopted assessment method foresees the following steps: An inventory of Ksourian models in Algeria. Selecting typologies of the southwest area for making an exhaustive study on these typologies. Comparison of selected typologies "Ksourian models" to currently building. Reported research could contribute to make an assessment card mapping of Ksourian models in Algeria, which facilitates proposals improvement to this building type and participate to preserve this cultural heritage.
{"title":"Performance Assessment of Ksourian Models: An Algerian case study","authors":"Khadidja Rahmani, N. Bouaziz","doi":"10.1109/IREC56325.2022.10001974","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10001974","url":null,"abstract":"This research focuses on Ksourian models of Algerian country. The proposal work is to check and evaluate thermal performance of old technique, which are derived from the Ksourian model, using simulation tools. The adopted assessment method foresees the following steps: An inventory of Ksourian models in Algeria. Selecting typologies of the southwest area for making an exhaustive study on these typologies. Comparison of selected typologies \"Ksourian models\" to currently building. Reported research could contribute to make an assessment card mapping of Ksourian models in Algeria, which facilitates proposals improvement to this building type and participate to preserve this cultural heritage.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"150 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":"134590491","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/IREC56325.2022.10002009
N. Soussi, W. Kriaa, H. Mhiri, P. Bournot
We present, in this work, the main results obtained from a two-dimensional numerical modeling of a tunnel kiln used for production hollow bricks. The results obtained made it possible to present contours of the temperature inside a tunnel kiln using a home-made two-dimensional code written with the open-source software SCILAB. The results showed the existence of a vertical temperature gradient in the brick stacks which can affect the final quality of the baked products.
{"title":"Contours of Air and Brick Temperatures inside a Tunnel Kiln","authors":"N. Soussi, W. Kriaa, H. Mhiri, P. Bournot","doi":"10.1109/IREC56325.2022.10002009","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10002009","url":null,"abstract":"We present, in this work, the main results obtained from a two-dimensional numerical modeling of a tunnel kiln used for production hollow bricks. The results obtained made it possible to present contours of the temperature inside a tunnel kiln using a home-made two-dimensional code written with the open-source software SCILAB. The results showed the existence of a vertical temperature gradient in the brick stacks which can affect the final quality of the baked products.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"14 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":"133644539","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/IREC56325.2022.10001894
F. Z. Dekhandji, Habiba Baali, A. Recioui
The work deals with the penetration of Distributed Generators (DGs) units into a simple radial system. An analytical optimization method is used to determine the optimal locations and sizes of the DGs minimizing the power distribution loss. A load flow method called Backward/Forward is used. In addition, a method based on the calculation of Voltage Stability Index (VSI) is employed to ensure the stability of the system after the placement of DG units.
{"title":"Optimal Placement of DGs in the Distribution Networks using an Analytical Approach","authors":"F. Z. Dekhandji, Habiba Baali, A. Recioui","doi":"10.1109/IREC56325.2022.10001894","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10001894","url":null,"abstract":"The work deals with the penetration of Distributed Generators (DGs) units into a simple radial system. An analytical optimization method is used to determine the optimal locations and sizes of the DGs minimizing the power distribution loss. A load flow method called Backward/Forward is used. In addition, a method based on the calculation of Voltage Stability Index (VSI) is employed to ensure the stability of the system after the placement of DG units.","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":"133324779","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/IREC56325.2022.10002019
A. Teyabeen, F. Mohamed
The most important parameter for designing solar photovoltaic (PV) systems is the tilt angle of PV panels with horizontal surface. It determines the amount of radiation incident on PV panels surfaces, thus it is required for an economic evaluation of solar PV systems. For this reason, this study aims to estimate the optimum tilt angle of solar PV panels to exploit the maximum daily solar radiation on the inclined surface. The analysis was achieved based on measured data recorded in four cities of Libya. The optimum tilt angle was determined by changing the angle of surface from 0° up to 90° with the 1° resolution and searching for the maximum value of the corresponding daily total solar radiation. In addition, Six empirical models were established to estimate the optimum tilt angle of PV panels. Their empirical coefficients were determined using non-linear regression technique. The models accuracies were evaluated using statistical criteria such as mean bias error, MBE, root mean square error, RMSE, and correlation coefficient, R. A combined statistical indicator, CSI, has been developed to assess and rank the performance of models. The presented results showed that the optimum tilt angle in the four studied sites varied from 0° to 59° throughout the year, it increased during the winter and decreased during the summer. The results also showed that both third-order polynomial and Fourier model presented the best efficiency in estimating optimum tilt angle with R = 0.9943.
{"title":"Modelling and Estimation of The Optimum Tilt Angle of Photovoltaic Systems, Case Study: Libya","authors":"A. Teyabeen, F. Mohamed","doi":"10.1109/IREC56325.2022.10002019","DOIUrl":"https://doi.org/10.1109/IREC56325.2022.10002019","url":null,"abstract":"The most important parameter for designing solar photovoltaic (PV) systems is the tilt angle of PV panels with horizontal surface. It determines the amount of radiation incident on PV panels surfaces, thus it is required for an economic evaluation of solar PV systems. For this reason, this study aims to estimate the optimum tilt angle of solar PV panels to exploit the maximum daily solar radiation on the inclined surface. The analysis was achieved based on measured data recorded in four cities of Libya. The optimum tilt angle was determined by changing the angle of surface from 0° up to 90° with the 1° resolution and searching for the maximum value of the corresponding daily total solar radiation. In addition, Six empirical models were established to estimate the optimum tilt angle of PV panels. Their empirical coefficients were determined using non-linear regression technique. The models accuracies were evaluated using statistical criteria such as mean bias error, MBE, root mean square error, RMSE, and correlation coefficient, R. A combined statistical indicator, CSI, has been developed to assess and rank the performance of models. The presented results showed that the optimum tilt angle in the four studied sites varied from 0° to 59° throughout the year, it increased during the winter and decreased during the summer. The results also showed that both third-order polynomial and Fourier model presented the best efficiency in estimating optimum tilt angle with R = 0.9943.","PeriodicalId":115939,"journal":{"name":"2022 13th International Renewable Energy Congress (IREC)","volume":"33 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":"114504923","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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