Current trends in the energy production sector call for alternative energy production methods with a high focus on renewable energy sources. Most of the countries in the world, and especially the developed countries, fund research towards distributed generation and zero energy balance communities. In order to eliminate the consumption of fossil fuels, a crucial role is taken by hydrogen as a fuel, as, if it is produced from renewable energy sources, it could contribute in substituting the fossil fuels used in transport or building's thermal energy sectors. Moreover, it is well known that electrolysis-fuel cells can also be used as a storage medium in autonomous renewable energy systems. In this case, fuel cells need to be carefully sized in order to optimize the storage system both in energy and economic aspects. In this respect, a theoretical model was developed, able to simulate at any time step the operation of a Proton Exchange Membrane Fuel Cell, by using as input data the technical specifications of the cell and the hydrogen flow. The developed model is based on theoretical, experimental and semi-empirical models in order to provide a flexible algorithm in terms of fuel cell sizing. The model is validated with an existing fuel cell experimental system (Nexa 1200) at different hydrogen flow profiles. The results showed high precision which verifies the reliability of the proposed model for using it in optimization procedures.Current trends in the energy production sector call for alternative energy production methods with a high focus on renewable energy sources. Most of the countries in the world, and especially the developed countries, fund research towards distributed generation and zero energy balance communities. In order to eliminate the consumption of fossil fuels, a crucial role is taken by hydrogen as a fuel, as, if it is produced from renewable energy sources, it could contribute in substituting the fossil fuels used in transport or building's thermal energy sectors. Moreover, it is well known that electrolysis-fuel cells can also be used as a storage medium in autonomous renewable energy systems. In this case, fuel cells need to be carefully sized in order to optimize the storage system both in energy and economic aspects. In this respect, a theoretical model was developed, able to simulate at any time step the operation of a Proton Exchange Membrane Fuel Cell, by using as input data the technical specifications of...
{"title":"Theoretical simulation model of a proton exchange membrane fuel cell","authors":"S. Tzelepis, K. Kavadias","doi":"10.1063/1.5138538","DOIUrl":"https://doi.org/10.1063/1.5138538","url":null,"abstract":"Current trends in the energy production sector call for alternative energy production methods with a high focus on renewable energy sources. Most of the countries in the world, and especially the developed countries, fund research towards distributed generation and zero energy balance communities. In order to eliminate the consumption of fossil fuels, a crucial role is taken by hydrogen as a fuel, as, if it is produced from renewable energy sources, it could contribute in substituting the fossil fuels used in transport or building's thermal energy sectors. Moreover, it is well known that electrolysis-fuel cells can also be used as a storage medium in autonomous renewable energy systems. In this case, fuel cells need to be carefully sized in order to optimize the storage system both in energy and economic aspects. In this respect, a theoretical model was developed, able to simulate at any time step the operation of a Proton Exchange Membrane Fuel Cell, by using as input data the technical specifications of the cell and the hydrogen flow. The developed model is based on theoretical, experimental and semi-empirical models in order to provide a flexible algorithm in terms of fuel cell sizing. The model is validated with an existing fuel cell experimental system (Nexa 1200) at different hydrogen flow profiles. The results showed high precision which verifies the reliability of the proposed model for using it in optimization procedures.Current trends in the energy production sector call for alternative energy production methods with a high focus on renewable energy sources. Most of the countries in the world, and especially the developed countries, fund research towards distributed generation and zero energy balance communities. In order to eliminate the consumption of fossil fuels, a crucial role is taken by hydrogen as a fuel, as, if it is produced from renewable energy sources, it could contribute in substituting the fossil fuels used in transport or building's thermal energy sectors. Moreover, it is well known that electrolysis-fuel cells can also be used as a storage medium in autonomous renewable energy systems. In this case, fuel cells need to be carefully sized in order to optimize the storage system both in energy and economic aspects. In this respect, a theoretical model was developed, able to simulate at any time step the operation of a Proton Exchange Membrane Fuel Cell, by using as input data the technical specifications of...","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"67 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114042750","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}
P. Axaopoulos, E. Fylladitakis, Shaislamov Alisher Shabdurakhmanovich, Abdullaev Nodirbek Azatvay Ogli
The building sector accounts for nearly half the energy consumption of Uzbekistan, with the residential energy consumption being much greater than that of even the most developed European countries. This is mainly attributed to the very low cost of energy in the region that, in combination with the lack of subsidies, offered no incentive for energy conservation measures. However, the price of energy has been rising at an alarming pace over the past few years, making building energy saving measures a nationwide concern. In this paper, we investigate the financially optimal insulation thickness for the most common external wall configurations using the two most commonly used building insulations materials in Tashkent, Uzbekistan, expanded polystyrene and mineral wool. Annual heating and cooling transmission loads are being calculated based on transient heat flow through the external walls and by using hourly climatic data. Additionally, we performed a financial analysis for each wall configuration and orientation, as well as for various thicknesses of insulation material. Depending on the wall type and orientation, the optimum insulation thickness was found to be between 3.75 cm and 11.0 cm. Furthermore, a sensitivity analysis indicates whether changes of the economic parameters affect the optimum insulation thickness.
建筑部门占乌兹别克斯坦能源消耗的近一半，住宅能源消耗甚至比欧洲最发达的国家都要大得多。这主要是由于该区域的能源成本很低，再加上缺乏补贴，没有采取节约能源措施的动力。然而，在过去几年中，能源价格以惊人的速度上涨，使建筑节能措施成为全国关注的问题。在本文中，我们使用乌兹别克斯坦塔什干最常用的两种建筑保温材料，膨胀聚苯乙烯和矿棉，研究了最常见外墙配置的经济最佳保温厚度。根据通过外墙的瞬时热流和每小时的气候数据，计算每年的供暖和制冷传输负荷。此外，我们对每面墙的结构和朝向以及不同厚度的保温材料进行了财务分析。根据墙体类型和朝向的不同，最佳保温厚度在3.75 cm ~ 11.0 cm之间。此外，敏感性分析表明经济参数的变化是否会影响最佳保温厚度。
{"title":"Financially optimum insulation thickness of external building walls","authors":"P. Axaopoulos, E. Fylladitakis, Shaislamov Alisher Shabdurakhmanovich, Abdullaev Nodirbek Azatvay Ogli","doi":"10.1063/1.5138520","DOIUrl":"https://doi.org/10.1063/1.5138520","url":null,"abstract":"The building sector accounts for nearly half the energy consumption of Uzbekistan, with the residential energy consumption being much greater than that of even the most developed European countries. This is mainly attributed to the very low cost of energy in the region that, in combination with the lack of subsidies, offered no incentive for energy conservation measures. However, the price of energy has been rising at an alarming pace over the past few years, making building energy saving measures a nationwide concern. In this paper, we investigate the financially optimal insulation thickness for the most common external wall configurations using the two most commonly used building insulations materials in Tashkent, Uzbekistan, expanded polystyrene and mineral wool. Annual heating and cooling transmission loads are being calculated based on transient heat flow through the external walls and by using hourly climatic data. Additionally, we performed a financial analysis for each wall configuration and orientation, as well as for various thicknesses of insulation material. Depending on the wall type and orientation, the optimum insulation thickness was found to be between 3.75 cm and 11.0 cm. Furthermore, a sensitivity analysis indicates whether changes of the economic parameters affect the optimum insulation thickness.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131059416","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}
At present, several problems and challenges have arisen as a result of human population growth and technological development, including global warming, water shortages and drought, especially in arid zones characterized by high temperatures.The low rainfall leads to increased drought and desertification, which has a negative impact on human life. In this study, a new laser technique was proposed to create rain in the atmosphere. Artificial rain can be formed by the proper energy of the laser pulse that stimulates a series of chemical and physical reactions in the clouds to obtain the appropriate rain drops.This technique is based on the use of a free electron beam with suitable energy and adaptable to the weather conditions by changing the wavelength and intensity of the laser beam and the duration of the pulse, ensuring that water droplets of sufficient size to fall.
{"title":"Rain formation by free electron laser pulse system FELPS","authors":"H. Kamil, M. S. Ahmed, T. Al-Aish","doi":"10.1063/1.5138570","DOIUrl":"https://doi.org/10.1063/1.5138570","url":null,"abstract":"At present, several problems and challenges have arisen as a result of human population growth and technological development, including global warming, water shortages and drought, especially in arid zones characterized by high temperatures.The low rainfall leads to increased drought and desertification, which has a negative impact on human life. In this study, a new laser technique was proposed to create rain in the atmosphere. Artificial rain can be formed by the proper energy of the laser pulse that stimulates a series of chemical and physical reactions in the clouds to obtain the appropriate rain drops.This technique is based on the use of a free electron beam with suitable energy and adaptable to the weather conditions by changing the wavelength and intensity of the laser beam and the duration of the pulse, ensuring that water droplets of sufficient size to fall.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122120573","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}
L. Mohammed, H. S. Hussein, Haider M. J. Haider, K. Jasim, A. H. Shaban, Samir G. M. Askar, Fouad Waheed Ali
In this research the Bi2-xSbxBa2Ca2-yLayCu3O10+δ compound was prepared and studied the influence of partial substation of Sb2O3 and La2O3 on the electrical and structural properties Samples synthesis by solid state reaction method. The examination of XRD diffraction shown that all samples have bulk polycrystalline with orthorhombic structure. The results shows that the increasing of the c-axis lattice constant for the samples substation with Sb2O3 and La2O3 as compared with those have no content, It was found that changing in lattice parameters (a,b), ratio c/a, mass density and volume fraction Vphases with increases of (Sb2O3,La2O3) concentration. All samples have highest phase 2223 major relative to the other phases. The electrical properties tested by using four probes technique to calculation critical temperatures, it was found the sample Bi1.6Sb0.4Ba2Ca1.8La0.2Cu3O10+δ has a highest critical temperatures Tc=122.5K.In this research the Bi2-xSbxBa2Ca2-yLayCu3O10+δ compound was prepared and studied the influence of partial substation of Sb2O3 and La2O3 on the electrical and structural properties Samples synthesis by solid state reaction method. The examination of XRD diffraction shown that all samples have bulk polycrystalline with orthorhombic structure. The results shows that the increasing of the c-axis lattice constant for the samples substation with Sb2O3 and La2O3 as compared with those have no content, It was found that changing in lattice parameters (a,b), ratio c/a, mass density and volume fraction Vphases with increases of (Sb2O3,La2O3) concentration. All samples have highest phase 2223 major relative to the other phases. The electrical properties tested by using four probes technique to calculation critical temperatures, it was found the sample Bi1.6Sb0.4Ba2Ca1.8La0.2Cu3O10+δ has a highest critical temperatures Tc=122.5K.
{"title":"The influence of partial substation of antimony & lanthanum oxides on electrical and structural properties for the superconductor compound Bi2-xSbxBa2Ca2-yLayCu3O10+δ","authors":"L. Mohammed, H. S. Hussein, Haider M. J. Haider, K. Jasim, A. H. Shaban, Samir G. M. Askar, Fouad Waheed Ali","doi":"10.1063/1.5138504","DOIUrl":"https://doi.org/10.1063/1.5138504","url":null,"abstract":"In this research the Bi2-xSbxBa2Ca2-yLayCu3O10+δ compound was prepared and studied the influence of partial substation of Sb2O3 and La2O3 on the electrical and structural properties Samples synthesis by solid state reaction method. The examination of XRD diffraction shown that all samples have bulk polycrystalline with orthorhombic structure. The results shows that the increasing of the c-axis lattice constant for the samples substation with Sb2O3 and La2O3 as compared with those have no content, It was found that changing in lattice parameters (a,b), ratio c/a, mass density and volume fraction Vphases with increases of (Sb2O3,La2O3) concentration. All samples have highest phase 2223 major relative to the other phases. The electrical properties tested by using four probes technique to calculation critical temperatures, it was found the sample Bi1.6Sb0.4Ba2Ca1.8La0.2Cu3O10+δ has a highest critical temperatures Tc=122.5K.In this research the Bi2-xSbxBa2Ca2-yLayCu3O10+δ compound was prepared and studied the influence of partial substation of Sb2O3 and La2O3 on the electrical and structural properties Samples synthesis by solid state reaction method. The examination of XRD diffraction shown that all samples have bulk polycrystalline with orthorhombic structure. The results shows that the increasing of the c-axis lattice constant for the samples substation with Sb2O3 and La2O3 as compared with those have no content, It was found that changing in lattice parameters (a,b), ratio c/a, mass density and volume fraction Vphases with increases of (Sb2O3,La2O3) concentration. All samples have highest phase 2223 major relative to the other phases. The electrical properties tested by using four probes technique to calculation critical temperatures, it was found the sample Bi1.6Sb0.4Ba2Ca1.8La0.2Cu3O10+δ has a highest critical temperatures Tc=122.5K.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129778585","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}
Djamel Daouda, T. Douadi, Djillali Ghobrini, N. Lahouel, Hanane Hamani
To solve the problem of environmental pollution during the metal cleaning process, new compounds extracted from biodiesel such as Pyropyl-Gallate (L1), Pyrogallol (L2), 4-Methyl-catecho (L3) and Protocatechuic-acid (L4) were investigated as green corrosion inhibitors by using density functional theory (DFT) and Molecular dynamic simulation (MDS) methods. The computed quantum chemical parameters obtained from DFT for instance the total energy (ET), the energy of the highest occupied molecular orbital (EHOMO), the energy of the lowest unoccupied molecular orbital (ELUMO), the dipole moment (µ) and the polarizability (α) indicate that those examined molecules were efficient corrosion inhibitor. The tested molecules present a general planar structure. This structure unit may be in favor of the important interaction zone if the molecule adsorbed on the metal surface at nearly 0° contact angle. As can be seen from Molecular electrostatic potential (MEP), it is clear that more electron rich regions are largely located around the heteroatoms and the conjugated double bonds, means that L1, L2, L3 and L4 can promote the formation of a complex on the metal surface by transferring electrons and forming a coordinate covalent bond through the chemical adsorption. From MDS study, the binding energy of the adsorption system (Inhibitor-Fe) is more important, showing that this adsorption system is very stable, and has high inhibitory efficiency. According to the study of quantum chemistry, the oxygen atoms of the molecules tested can give electrons to the unoccupied iron orbital “d” to form coordination bonds while the orbital π of aromatic rings can accept electrons from the iron orbital “d” to form coordination bonds. A good agreement was found between DFT and MDS methods.To solve the problem of environmental pollution during the metal cleaning process, new compounds extracted from biodiesel such as Pyropyl-Gallate (L1), Pyrogallol (L2), 4-Methyl-catecho (L3) and Protocatechuic-acid (L4) were investigated as green corrosion inhibitors by using density functional theory (DFT) and Molecular dynamic simulation (MDS) methods. The computed quantum chemical parameters obtained from DFT for instance the total energy (ET), the energy of the highest occupied molecular orbital (EHOMO), the energy of the lowest unoccupied molecular orbital (ELUMO), the dipole moment (µ) and the polarizability (α) indicate that those examined molecules were efficient corrosion inhibitor. The tested molecules present a general planar structure. This structure unit may be in favor of the important interaction zone if the molecule adsorbed on the metal surface at nearly 0° contact angle. As can be seen from Molecular electrostatic potential (MEP), it is clear that more electron rich regions are largely l...
{"title":"Investigation of some phenolic-type antioxidants compounds extracted from biodiesel as green natural corrosion inhibitors; DFT and molecular dynamic simulation, comparative study","authors":"Djamel Daouda, T. Douadi, Djillali Ghobrini, N. Lahouel, Hanane Hamani","doi":"10.1063/1.5138584","DOIUrl":"https://doi.org/10.1063/1.5138584","url":null,"abstract":"To solve the problem of environmental pollution during the metal cleaning process, new compounds extracted from biodiesel such as Pyropyl-Gallate (L1), Pyrogallol (L2), 4-Methyl-catecho (L3) and Protocatechuic-acid (L4) were investigated as green corrosion inhibitors by using density functional theory (DFT) and Molecular dynamic simulation (MDS) methods. The computed quantum chemical parameters obtained from DFT for instance the total energy (ET), the energy of the highest occupied molecular orbital (EHOMO), the energy of the lowest unoccupied molecular orbital (ELUMO), the dipole moment (µ) and the polarizability (α) indicate that those examined molecules were efficient corrosion inhibitor. The tested molecules present a general planar structure. This structure unit may be in favor of the important interaction zone if the molecule adsorbed on the metal surface at nearly 0° contact angle. As can be seen from Molecular electrostatic potential (MEP), it is clear that more electron rich regions are largely located around the heteroatoms and the conjugated double bonds, means that L1, L2, L3 and L4 can promote the formation of a complex on the metal surface by transferring electrons and forming a coordinate covalent bond through the chemical adsorption. From MDS study, the binding energy of the adsorption system (Inhibitor-Fe) is more important, showing that this adsorption system is very stable, and has high inhibitory efficiency. According to the study of quantum chemistry, the oxygen atoms of the molecules tested can give electrons to the unoccupied iron orbital “d” to form coordination bonds while the orbital π of aromatic rings can accept electrons from the iron orbital “d” to form coordination bonds. A good agreement was found between DFT and MDS methods.To solve the problem of environmental pollution during the metal cleaning process, new compounds extracted from biodiesel such as Pyropyl-Gallate (L1), Pyrogallol (L2), 4-Methyl-catecho (L3) and Protocatechuic-acid (L4) were investigated as green corrosion inhibitors by using density functional theory (DFT) and Molecular dynamic simulation (MDS) methods. The computed quantum chemical parameters obtained from DFT for instance the total energy (ET), the energy of the highest occupied molecular orbital (EHOMO), the energy of the lowest unoccupied molecular orbital (ELUMO), the dipole moment (µ) and the polarizability (α) indicate that those examined molecules were efficient corrosion inhibitor. The tested molecules present a general planar structure. This structure unit may be in favor of the important interaction zone if the molecule adsorbed on the metal surface at nearly 0° contact angle. As can be seen from Molecular electrostatic potential (MEP), it is clear that more electron rich regions are largely l...","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122397497","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}
A thin film of (SnSe) and SnSe:Cu with various Cu ratio (0,3,5 and 7)% have been prepared by thermal evaporation technique with thickness 400±20 nm on glass substrate at (R.T). The effect of Cu dopants concentration on the structural, morphological, optical and electrical properties of (SnSe) Nano crystalline thin films was explored by using X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), UV–Vis absorption spectroscopy and Hall Effect measurement respectively. X-ray diffraction analysis reveal the polycrystalline nature of the all films deposited with orthorhombic structure which possess a preferred orientation along the (111) plane. The crystalline sizes of the films vary in the range of (18.167– 25.91) nm, depending on the Cu doping ratio. The SEM study show that the film exhibit growth of small grains and the morphologies of SnSe could be changed from spherical grains to platelet-like particles. The AFM investigations show that the films grain size vary in the range (60.12 to 70.59) nm with increasing Cu doping ratio. The optical measurements on un doped and Cu doped SnSe thin films indicate that the samples have direct transition with an optical band gap of (1.3 –1. 5) eV and the absorption coefficient ≥104 cm−1, which is make these films suitable for photovoltaic devices. Hall Effect measurement illustrate that all samples have p-type conductivity and the carrier concentration of the thin films was of the order of 1014/cm3A thin film of (SnSe) and SnSe:Cu with various Cu ratio (0,3,5 and 7)% have been prepared by thermal evaporation technique with thickness 400±20 nm on glass substrate at (R.T). The effect of Cu dopants concentration on the structural, morphological, optical and electrical properties of (SnSe) Nano crystalline thin films was explored by using X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), UV–Vis absorption spectroscopy and Hall Effect measurement respectively. X-ray diffraction analysis reveal the polycrystalline nature of the all films deposited with orthorhombic structure which possess a preferred orientation along the (111) plane. The crystalline sizes of the films vary in the range of (18.167– 25.91) nm, depending on the Cu doping ratio. The SEM study show that the film exhibit growth of small grains and the morphologies of SnSe could be changed from spherical grains to platelet-like particles. The AFM investigations sho...
{"title":"Cu doping effect on characterization of nano crystalline SnSe thin films","authors":"G. Ahmed, B. K. Al-Maiyaly","doi":"10.1063/1.5138505","DOIUrl":"https://doi.org/10.1063/1.5138505","url":null,"abstract":"A thin film of (SnSe) and SnSe:Cu with various Cu ratio (0,3,5 and 7)% have been prepared by thermal evaporation technique with thickness 400±20 nm on glass substrate at (R.T). The effect of Cu dopants concentration on the structural, morphological, optical and electrical properties of (SnSe) Nano crystalline thin films was explored by using X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), UV–Vis absorption spectroscopy and Hall Effect measurement respectively. X-ray diffraction analysis reveal the polycrystalline nature of the all films deposited with orthorhombic structure which possess a preferred orientation along the (111) plane. The crystalline sizes of the films vary in the range of (18.167– 25.91) nm, depending on the Cu doping ratio. The SEM study show that the film exhibit growth of small grains and the morphologies of SnSe could be changed from spherical grains to platelet-like particles. The AFM investigations show that the films grain size vary in the range (60.12 to 70.59) nm with increasing Cu doping ratio. The optical measurements on un doped and Cu doped SnSe thin films indicate that the samples have direct transition with an optical band gap of (1.3 –1. 5) eV and the absorption coefficient ≥104 cm−1, which is make these films suitable for photovoltaic devices. Hall Effect measurement illustrate that all samples have p-type conductivity and the carrier concentration of the thin films was of the order of 1014/cm3A thin film of (SnSe) and SnSe:Cu with various Cu ratio (0,3,5 and 7)% have been prepared by thermal evaporation technique with thickness 400±20 nm on glass substrate at (R.T). The effect of Cu dopants concentration on the structural, morphological, optical and electrical properties of (SnSe) Nano crystalline thin films was explored by using X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), UV–Vis absorption spectroscopy and Hall Effect measurement respectively. X-ray diffraction analysis reveal the polycrystalline nature of the all films deposited with orthorhombic structure which possess a preferred orientation along the (111) plane. The crystalline sizes of the films vary in the range of (18.167– 25.91) nm, depending on the Cu doping ratio. The SEM study show that the film exhibit growth of small grains and the morphologies of SnSe could be changed from spherical grains to platelet-like particles. The AFM investigations sho...","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123092874","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}
A. Azouzoute, Mostafa Chouitar, M. Garoum, E. Bennouna, A. Ghennioui
Solar PV technology is now widely exploited as a source of energy production. However, the PV panels are generally affected by a variety of factors that decrease the efficiency of the system especially those related to the dust deposition. Therefore, in this study, a new methodology to quantify the drop of transmittance of the glass on the surface of a PV panel was investigated. The basic of this method is using the Brewster angle to evaluate the intensity of the reflected ray from the surface of the glass in the presence of different amount of density of dust deposition. The results showed that the intensity of the reflected ray using Brewster angle decrease with the increase of the density of deposition on the surface of the glass sample. The experiment elucidated that this new method can be a significant methodology to quantify the effect of dust deposition and to optimize the cleaning on the solar PV plant.Solar PV technology is now widely exploited as a source of energy production. However, the PV panels are generally affected by a variety of factors that decrease the efficiency of the system especially those related to the dust deposition. Therefore, in this study, a new methodology to quantify the drop of transmittance of the glass on the surface of a PV panel was investigated. The basic of this method is using the Brewster angle to evaluate the intensity of the reflected ray from the surface of the glass in the presence of different amount of density of dust deposition. The results showed that the intensity of the reflected ray using Brewster angle decrease with the increase of the density of deposition on the surface of the glass sample. The experiment elucidated that this new method can be a significant methodology to quantify the effect of dust deposition and to optimize the cleaning on the solar PV plant.
{"title":"A new PV soiling monitoring device for optimized cleaning strategy","authors":"A. Azouzoute, Mostafa Chouitar, M. Garoum, E. Bennouna, A. Ghennioui","doi":"10.1063/1.5138554","DOIUrl":"https://doi.org/10.1063/1.5138554","url":null,"abstract":"Solar PV technology is now widely exploited as a source of energy production. However, the PV panels are generally affected by a variety of factors that decrease the efficiency of the system especially those related to the dust deposition. Therefore, in this study, a new methodology to quantify the drop of transmittance of the glass on the surface of a PV panel was investigated. The basic of this method is using the Brewster angle to evaluate the intensity of the reflected ray from the surface of the glass in the presence of different amount of density of dust deposition. The results showed that the intensity of the reflected ray using Brewster angle decrease with the increase of the density of deposition on the surface of the glass sample. The experiment elucidated that this new method can be a significant methodology to quantify the effect of dust deposition and to optimize the cleaning on the solar PV plant.Solar PV technology is now widely exploited as a source of energy production. However, the PV panels are generally affected by a variety of factors that decrease the efficiency of the system especially those related to the dust deposition. Therefore, in this study, a new methodology to quantify the drop of transmittance of the glass on the surface of a PV panel was investigated. The basic of this method is using the Brewster angle to evaluate the intensity of the reflected ray from the surface of the glass in the presence of different amount of density of dust deposition. The results showed that the intensity of the reflected ray using Brewster angle decrease with the increase of the density of deposition on the surface of the glass sample. The experiment elucidated that this new method can be a significant methodology to quantify the effect of dust deposition and to optimize the cleaning on the solar PV plant.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134467864","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}
A. K. D. Ali, Ismaeel K. Jasim, K. Jasim, Maher A. Hassan
The present study includes the calculation of the electrical and magnetic properties of the C-TABCCO superconducting system in solid-state interaction by adding silver to the first system under pressure of 7 ton / cm2 and the thermodynamic temperature (800 K). The electrical properties are measured using The LCR meter shows that the dielectric constant (K) and the loss factor (D) decrease with increasing frequency and the alternating electrical conductivity (AC) increases with increasing frequency. Therefore, we deduce that the inertial properties and all the samples depend on the addition ratios. The higher the frequency, the better the connectivity and the lower the density. The Using the technique of (vibration sample Magnometer) (VSM) where the hysteric rings were extracted, magnetic properties of the hysterical ring forms of magnetic affectivity (M s) and magnetic susceptibility (M s) and magnetic delay (M r) relative permeability (μ r) of magnetismThe present study includes the calculation of the electrical and magnetic properties of the C-TABCCO superconducting system in solid-state interaction by adding silver to the first system under pressure of 7 ton / cm2 and the thermodynamic temperature (800 K). The electrical properties are measured using The LCR meter shows that the dielectric constant (K) and the loss factor (D) decrease with increasing frequency and the alternating electrical conductivity (AC) increases with increasing frequency. Therefore, we deduce that the inertial properties and all the samples depend on the addition ratios. The higher the frequency, the better the connectivity and the lower the density. The Using the technique of (vibration sample Magnometer) (VSM) where the hysteric rings were extracted, magnetic properties of the hysterical ring forms of magnetic affectivity (M s) and magnetic susceptibility (M s) and magnetic delay (M r) relative permeability (μ r) of magnetism
{"title":"Manufacture of C-TABCCO superconducting system and study the electrical and magnetic properties","authors":"A. K. D. Ali, Ismaeel K. Jasim, K. Jasim, Maher A. Hassan","doi":"10.1063/1.5138506","DOIUrl":"https://doi.org/10.1063/1.5138506","url":null,"abstract":"The present study includes the calculation of the electrical and magnetic properties of the C-TABCCO superconducting system in solid-state interaction by adding silver to the first system under pressure of 7 ton / cm2 and the thermodynamic temperature (800 K). The electrical properties are measured using The LCR meter shows that the dielectric constant (K) and the loss factor (D) decrease with increasing frequency and the alternating electrical conductivity (AC) increases with increasing frequency. Therefore, we deduce that the inertial properties and all the samples depend on the addition ratios. The higher the frequency, the better the connectivity and the lower the density. The Using the technique of (vibration sample Magnometer) (VSM) where the hysteric rings were extracted, magnetic properties of the hysterical ring forms of magnetic affectivity (M s) and magnetic susceptibility (M s) and magnetic delay (M r) relative permeability (μ r) of magnetismThe present study includes the calculation of the electrical and magnetic properties of the C-TABCCO superconducting system in solid-state interaction by adding silver to the first system under pressure of 7 ton / cm2 and the thermodynamic temperature (800 K). The electrical properties are measured using The LCR meter shows that the dielectric constant (K) and the loss factor (D) decrease with increasing frequency and the alternating electrical conductivity (AC) increases with increasing frequency. Therefore, we deduce that the inertial properties and all the samples depend on the addition ratios. The higher the frequency, the better the connectivity and the lower the density. The Using the technique of (vibration sample Magnometer) (VSM) where the hysteric rings were extracted, magnetic properties of the hysterical ring forms of magnetic affectivity (M s) and magnetic susceptibility (M s) and magnetic delay (M r) relative permeability (μ r) of magnetism","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133342467","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}
In this present work, we studied the influence of nanoic (In2O3) Doping of ZnO varistors’ electrical characteristics, I-V nonlinear coefficient, the leakage current, break down voltage and grain size, have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), electrical measurements, with different sintering temperatures (1000, 1050, 1100) °C for 2h. The results exhibit the nonlinear coefficient (α) gradually increased by increasing concentrations of (In2O3), Sintered varistor leakage current reduced with increased dopant concentration of nanoic (In2O3), the breakdown voltage values reduced with increased the sintering temperature. With the increasing (In2O3), The average grain size slightly reduced, which are improving the voltage gradient.In this present work, we studied the influence of nanoic (In2O3) Doping of ZnO varistors’ electrical characteristics, I-V nonlinear coefficient, the leakage current, break down voltage and grain size, have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), electrical measurements, with different sintering temperatures (1000, 1050, 1100) °C for 2h. The results exhibit the nonlinear coefficient (α) gradually increased by increasing concentrations of (In2O3), Sintered varistor leakage current reduced with increased dopant concentration of nanoic (In2O3), the breakdown voltage values reduced with increased the sintering temperature. With the increasing (In2O3), The average grain size slightly reduced, which are improving the voltage gradient.
{"title":"Study the effect of nanoic indium oxide (In2O3) on electrical properties of ZnO- based varistor","authors":"M. Abbas, A. Ibraheem","doi":"10.1063/1.5138501","DOIUrl":"https://doi.org/10.1063/1.5138501","url":null,"abstract":"In this present work, we studied the influence of nanoic (In2O3) Doping of ZnO varistors’ electrical characteristics, I-V nonlinear coefficient, the leakage current, break down voltage and grain size, have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), electrical measurements, with different sintering temperatures (1000, 1050, 1100) °C for 2h. The results exhibit the nonlinear coefficient (α) gradually increased by increasing concentrations of (In2O3), Sintered varistor leakage current reduced with increased dopant concentration of nanoic (In2O3), the breakdown voltage values reduced with increased the sintering temperature. With the increasing (In2O3), The average grain size slightly reduced, which are improving the voltage gradient.In this present work, we studied the influence of nanoic (In2O3) Doping of ZnO varistors’ electrical characteristics, I-V nonlinear coefficient, the leakage current, break down voltage and grain size, have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), electrical measurements, with different sintering temperatures (1000, 1050, 1100) °C for 2h. The results exhibit the nonlinear coefficient (α) gradually increased by increasing concentrations of (In2O3), Sintered varistor leakage current reduced with increased dopant concentration of nanoic (In2O3), the breakdown voltage values reduced with increased the sintering temperature. With the increasing (In2O3), The average grain size slightly reduced, which are improving the voltage gradient.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114246845","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}
In this study, the biomedical applications of the cold Plasma physics technique were investigated. Dielectric Barrier Discharges (DBD) plasma at atmospheric pressure is used for studying the cold plasma effect on human sperm motility. Patients how had sperms with low spermatozoal motility (Asthenozoospermia) were included in this study. Focusing on the results of motility and DNA integrity before and after exposing to plasma system, it is concluded that the sperms motility of the semen samples shows a good response to the cold plasma by increasing the sperm motility.In this study, the biomedical applications of the cold Plasma physics technique were investigated. Dielectric Barrier Discharges (DBD) plasma at atmospheric pressure is used for studying the cold plasma effect on human sperm motility. Patients how had sperms with low spermatozoal motility (Asthenozoospermia) were included in this study. Focusing on the results of motility and DNA integrity before and after exposing to plasma system, it is concluded that the sperms motility of the semen samples shows a good response to the cold plasma by increasing the sperm motility.
{"title":"Effect of dielectric barrier discharge on sperm motility and influence on oxidative stress in patient with asthenospermia","authors":"Marwa S. Hanon, S. N. Mazhir, E. Hussein","doi":"10.1063/1.5138577","DOIUrl":"https://doi.org/10.1063/1.5138577","url":null,"abstract":"In this study, the biomedical applications of the cold Plasma physics technique were investigated. Dielectric Barrier Discharges (DBD) plasma at atmospheric pressure is used for studying the cold plasma effect on human sperm motility. Patients how had sperms with low spermatozoal motility (Asthenozoospermia) were included in this study. Focusing on the results of motility and DNA integrity before and after exposing to plasma system, it is concluded that the sperms motility of the semen samples shows a good response to the cold plasma by increasing the sperm motility.In this study, the biomedical applications of the cold Plasma physics technique were investigated. Dielectric Barrier Discharges (DBD) plasma at atmospheric pressure is used for studying the cold plasma effect on human sperm motility. Patients how had sperms with low spermatozoal motility (Asthenozoospermia) were included in this study. Focusing on the results of motility and DNA integrity before and after exposing to plasma system, it is concluded that the sperms motility of the semen samples shows a good response to the cold plasma by increasing the sperm motility.","PeriodicalId":186251,"journal":{"name":"TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129374922","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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