主题演讲
Dr. Zied Driss
Mechanical Engineering at ENIS; Chief of project at LASEM, Tunisia
Title of the presentation: Computational and experimental investigations of the aerodynamic characteristics of a NACA airfoil wind turbine
Abstract : Computational and experimental investigations are conducted in an open wind tunnel to study the aerodynamic characteristics of a NACA airfoil wind turbine. For thus, we have started by installing the necessary equipment for the global characterization. This involved the manufacture of an open wind tunnel and its instrumentation. Using this test bench, we can follow the aerodynamic characteristics of the flow around different types of wind turbines. The hot wire anemometry technique is used to justify the nature of the flow generated by the system and ensure a uniform airflow in the test vein. The experimental device is used to predict the aerodynamic behavior and investigate the conditions of the wind turbines placed in the air flow. By changing the rotation frequency of the vacuum cleaner SV0081C5-1F type, the wind tunnel exit-air velocity can be controlled. The entire tests have been conducted with a hot wire anemometry AM-4204 model to measure the air velocity. In the test vein, the maximum air velocity value is equal to 12.7 m/s. The rotational speed of the wind turbine rotor was measured with a digital tachometer CA-27 model. For the computational results, a commercial CFD code has been used to present the local characteristics in different transverse and longitudinal planes. The considered numerical model is based on the resolution of the Navier-Stokes equations. These equations are solved by a finite volume discretization method. Globally, the goal of this work is to optimize and to improve the wind turbines conditions and to explore the wind energy that consist an inexhaustible and advantageous renewable energy regarding mass production of the electric energy.
Title of the presentation: Computational and experimental investigations of the aerodynamic characteristics of a NACA airfoil wind turbine
Abstract : Computational and experimental investigations are conducted in an open wind tunnel to study the aerodynamic characteristics of a NACA airfoil wind turbine. For thus, we have started by installing the necessary equipment for the global characterization. This involved the manufacture of an open wind tunnel and its instrumentation. Using this test bench, we can follow the aerodynamic characteristics of the flow around different types of wind turbines. The hot wire anemometry technique is used to justify the nature of the flow generated by the system and ensure a uniform airflow in the test vein. The experimental device is used to predict the aerodynamic behavior and investigate the conditions of the wind turbines placed in the air flow. By changing the rotation frequency of the vacuum cleaner SV0081C5-1F type, the wind tunnel exit-air velocity can be controlled. The entire tests have been conducted with a hot wire anemometry AM-4204 model to measure the air velocity. In the test vein, the maximum air velocity value is equal to 12.7 m/s. The rotational speed of the wind turbine rotor was measured with a digital tachometer CA-27 model. For the computational results, a commercial CFD code has been used to present the local characteristics in different transverse and longitudinal planes. The considered numerical model is based on the resolution of the Navier-Stokes equations. These equations are solved by a finite volume discretization method. Globally, the goal of this work is to optimize and to improve the wind turbines conditions and to explore the wind energy that consist an inexhaustible and advantageous renewable energy regarding mass production of the electric energy.
Dr. Marwa Salem
University of Hail (UOH), Saudi Arabia; Ain Shams University, Egypt
Title of the presentation: Enhancing the Performance of Electrostatic MEMS Converter used in Energy Scavenging Systems
Abstract: Recent research studied electrostatic MEMS converter performance. One of its main problems is that its fabrication is not compatible with CMOS technology. 3D integration solves such problem. The second problem is that it is fragile. Specific considerations have to be taken concerning its fabrication. The converter performance has to be studied. Major modifications in its structure have to be carried out. These modifications permit the converter to achieve output power around 200μW. The process flow for fabricating the converter has to be considered. The structure rigidity has to be considered through it fabrication process flow.
Title of the presentation: Enhancing the Performance of Electrostatic MEMS Converter used in Energy Scavenging Systems
Abstract: Recent research studied electrostatic MEMS converter performance. One of its main problems is that its fabrication is not compatible with CMOS technology. 3D integration solves such problem. The second problem is that it is fragile. Specific considerations have to be taken concerning its fabrication. The converter performance has to be studied. Major modifications in its structure have to be carried out. These modifications permit the converter to achieve output power around 200μW. The process flow for fabricating the converter has to be considered. The structure rigidity has to be considered through it fabrication process flow.
Dr. Wen-Cheng Lai
Electrical Engineering, National Taiwan University of Science and Technology, Taiwan
Title of the presentation: Wireless Charging Design for IoT Energy Saving Application
Abstract: In 2020, several organizations estimate there will be 50 billion internet connected devices. Many of these devices will report to central servers and databases, while other devices may communicate directly with each other and develop their own intelligence. Most of these Internet of Things devices will be extraordinarily small and in many cased unseen. While connected smart homes and self-driving cars are very close to becoming a reality, IoT development still faces several challenges in order to reach its full potential. With the growing number of smart and small devices, energy saving has become a definite IoT barrier. That’s where wireless charging comes in! The future of the Internet of Things will be powered by wireless charging technology to get more performance. But for this growth to happen, new power solutions will be required: ambient energy harvesting combined with wireless charging for powering wearable technologies and the many types of IoE devices.
Title of the presentation: Hybrid systems - photovoltaic panel/thermoelectric generator/solar collector. Past, present and future
Abstract: The temperature is an important parameter which influences not only the efficiency of the photovoltaic cells and panels, but also their lifetime. Reducing the temperature of the photovoltaic cells is a necessity for increasing their efficiency and lifetime. There are some solutions for cooling the photovoltaic cells, one of the best being the implementation of the PVT (photovoltaic cells and solar thermal collector) hybrid system. Nowadays new types of the hybrid systems were developed by the researchers, such as: PV/TEG (photovoltaic cells and thermoelectric generators) or PV/TEG/STC (photovoltaic cells, thermoelectric generators and solar thermal collector). These hybrid systems are characterized and analyzed from parameters, efficiency and cost perspective, but also from the implementation perspective. Some aspects about the hybrid systems trends are also analyzed and presented.
Title of the presentation: Wireless Charging Design for IoT Energy Saving Application
Abstract: In 2020, several organizations estimate there will be 50 billion internet connected devices. Many of these devices will report to central servers and databases, while other devices may communicate directly with each other and develop their own intelligence. Most of these Internet of Things devices will be extraordinarily small and in many cased unseen. While connected smart homes and self-driving cars are very close to becoming a reality, IoT development still faces several challenges in order to reach its full potential. With the growing number of smart and small devices, energy saving has become a definite IoT barrier. That’s where wireless charging comes in! The future of the Internet of Things will be powered by wireless charging technology to get more performance. But for this growth to happen, new power solutions will be required: ambient energy harvesting combined with wireless charging for powering wearable technologies and the many types of IoE devices.
Dr. Cotfas Daniel Tudor
Transilvania University of Brasov, RomaniaTitle of the presentation: Hybrid systems - photovoltaic panel/thermoelectric generator/solar collector. Past, present and future
Abstract: The temperature is an important parameter which influences not only the efficiency of the photovoltaic cells and panels, but also their lifetime. Reducing the temperature of the photovoltaic cells is a necessity for increasing their efficiency and lifetime. There are some solutions for cooling the photovoltaic cells, one of the best being the implementation of the PVT (photovoltaic cells and solar thermal collector) hybrid system. Nowadays new types of the hybrid systems were developed by the researchers, such as: PV/TEG (photovoltaic cells and thermoelectric generators) or PV/TEG/STC (photovoltaic cells, thermoelectric generators and solar thermal collector). These hybrid systems are characterized and analyzed from parameters, efficiency and cost perspective, but also from the implementation perspective. Some aspects about the hybrid systems trends are also analyzed and presented.
