Mujgan Huseynli

Hydrogen energy storage has garnered significant attention as a crucial component of sustainable energy systems, particularly for integrating renewable energy sources and addressing grid stability challenges. This paper provides a comprehensive overview of hydrogen energy storage, covering key aspects from production to utilization. Beginning with an introduction to the importance of energy storage in the context of renewable energy integration, the paper discusses various methods of hydrogen storage such as compressed gas storage, cryogenic storage, and material-based storage, highlighting their respective advantages and limitations. Furthermore, the concept of power-to-power storage, which involves converting electrical energy into hydrogen through electrolysis and reconverting it back to electricity using fuel cells or combustion engines, is explored in detail. The paper also addresses current challenges facing hydrogen energy storage, including technological constraints, infrastructure limitations, and cost considerations, and proposes potential solutions to overcome these challenges. Finally, future directions and research opportunities in hydrogen energy storage are discussed, emphasizing the role of innovation and collaboration in advancing this critical technology for a sustainable energy future.

Level control loops are widespread and necessary in the industry to monitor and control the process properly, and to ensure the safety and efficiency of the plant. If the level of the substance is not properly measured or maintained correctly, it can result in production loss, the damage to the equipment and process. Therefore, control loops will always carry out the following three actions in order to avoid undesirable situations: measurement, comparison, and modification. In order to maintain the stability of the system and perform the mentioned tasks, level control loop technologies of BHOS test rig are selected according to the system requirements. This system comprises the needed components for automated control: the sensing device, the disturbance source, the controller, and the final control element (FCE). Firstly, the level transmitter measures tank level and sends a signal to the related level controller. Guided-Wave-Radar level/interface transmitter is selected as it has a long measuring range and less sensitivity to the disturbances. Then, the controller compares measured value with the desired value and transmits a control action to FCE. The best-suited algorithm for controlling the system is Proportional-Integral - PI control. If required, the controller can be tuned using Trial-and-Error approach. Lastly, the valve receives a control action and opens to allow some liquid to exit the tank. The globe valve is selected as it is most suitable for full-range flow control situations. In addition, the inlet pump speed can be altered and disturbance to the system can be created by altering the frequency of the Variable-Frequency-Drive. As a result of technology review and design of the loop for the test rig, technical documentation used at various phases of the project will be created for the system. As a contribution to the future curriculum, lab work instructions will also be prepared based on the project.

Recognizing the synergy between GaN devices and FPGA technology is crucial as it addresses fundamental issues in power electronics, such as enhancing energy efficiency, minimizing system size, and improving reliability. This study aims using of the continuous advancement in power electronics and contributing valuable insights to the ongoing development of sustainable energy systems, electric mobility, and industrial automation. The outcomes and insights derived from this review are essential for creating next-generation power conversion systems that fulfill the growing need for efficient and reliable power solutions.

Visually impaired people face a lot of challenges in their daily life. Now, using the enhanced technological tools, a lot of devices have been designed for helping them to accomplish basic tasks as examining surrounding environment. Building an assistive system is more robust and effective than separate devices in order to make user feel more secure and safer.