Current Issue : October-December Volume : 2024 Issue Number : 4 Articles : 5 Articles
This paper primarily studies the application of power electronics technology in renewable energy systems. Firstly, it introduces the current development status and challenges of renewable energy, then focuses on the application of power electronics technology in wind power generation systems, solar power generation systems, and other renewable energy systems. Through the analysis of related literature and case studies, the important role of power electronics technology in improving the efficiency, stability, and reliability of renewable energy systems is summarized. In wind power generation systems, power electronics technology improves generation efficiency through variable speed control and power regulation and plays a crucial role in grid connection and fault protection. In solar power generation systems, power electronics technology is mainly reflected in photovoltaic inverters and Maximum Power Point Tracking (MPPT) technology, effectively improving solar energy utilization and system stability. Additionally, power electronics technology has also achieved significant results in other renewable energy systems such as geothermal and ocean energy generation. Finally, the paper forecasts the future development trends of power electronics technology in renewable energy systems, pointing out that intelligence, integration, and high efficiency will be the future directions....
Power Electronics Converters (PEC) play a crucial role in the operation of many modern electrical systems and devices. Despite their widespread use, the lack of an efficient and cost-effective disassembly process can limit their repairability, refurbishability, remanufacturability and, ultimately, recyclability, thus hindering the circularity of products. In order to improve their circularity, it is important to assess their ease of disassembly. Therefore, this paper investigates the applicability of the “ease of Disassembly Metric” (eDiM), which is referenced in the material efficiency standards, Benelux repairability assessment method, and Repair Scoring System (RSS), to analyze the ease of disassembly of energy-related products. After identifying the limitations of the eDiM method, we refined and adapted it to make it more suitable for Printed Circuit Board (PCB)-based PEC, and thus propose a PCB-based disassemblability assessment method allowing the implementation of quantifiable requirements supporting their circularity. This standardized approach, at the PCB level, can improve the circularity of such products by facilitating design enhancements. With this approach, policymakers and designers can contribute more effectively to the transition to a circular economy in PCB electronics, particularly in the field of power electronics....
This article delves into the transformative role of electric power electronics in shaping modern infrastructure across diverse domains. It comprehensively explores the applications of these technologies in energy distribution, transportation infrastructure, and communication networks. The discussion begins with how power electronics enable the integration of renewable energy sources into smart grids, enhance the efficiency of high-voltage direct current (HVDC) systems, and facilitate advanced energy storage solutions. In transportation, the focus shifts to electric vehicles, railway systems, and intelligent transportation systems, highlighting how power electronics contribute to sustainability and efficiency. The article further explores the role of power electronics in communication networks, including broadband power line communication, power supply in data centers, and wireless power transfer. Each section underscores the significance of power electronics in driving efficiency, sustainability, and technological advancement in infrastructure development. The article emphasizes the need for ongoing innovation in power electronics to meet the challenges of a rapidly evolving global landscape and ensure resilient, adaptive, and environmentally responsible infrastructure....
This article presents a detailed analysis of a previously introduced boost converter based on cascaded capacitor connections. The analyzed converter maintains the same voltage gain as its conventional double-boost converter counterpart. The main advantage of the redesigned converter is that it requires smaller capacitors, rated to a lower voltage, due to the cascaded connection. This makes it suitable for various applications, including distributed generation and microgrids. This paper conducts the mathematical modeling of the converter with large signal models and the equilibrium operation in continuous conduction mode, employed to implement a control scheme. Even though the individual capacitor voltage ripple reaches high values, for voltage gains above five, the output voltage ripple is lower compared with that of other converters. The analysis also includes a comparative study with the conventional double dual boost converter. Simulations assess the proposed topology’s ability to effectively minimize the switching ripple in the output voltage, even with smaller capacitors. Finally, experimental results are also provided to confirm the functionality of the proposed converters under various operational conditions, which confirm its suitability for low-voltage generator applications....
The novel method of combining geothermal energy with an all-air heating, ventilation, and air conditioning (HVAC) system is presented in this work. A building in Lebanon serves as the case study, which aims to determine the necessary mass flow rate for the conditioned space. Rather than permitting ambient air to enter the Air Handling Unit (AHU) directly, the plan calls for a 2-meter-deep geothermal duct to be buried. By adjusting the air temperature prior to it entering the AHU, this geothermal duct helps to improve the efficiency of the HVAC system and lowers the AHU's yearly energy usage. Furthermore, the idea guarantees that there will always be 100% fresh air available, which means that the all-air HVAC system won't need to recycle treated air from the conditioned space—also known as return air. According to the findings, the heat rate of the geothermal duct may reach 210 kW, which would result in a large decrease in CO2 emissions and cost savings for the HVAC system....
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