Saudi Cultural Missions Theses & Dissertations
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Item Restricted Hybrid Architecture Satellite Solar Collector: Power System - Space Segment(Saudi Digital Library, 2023-12-05) Alkathiri, Nawaf Mohammed; Ceriotti, MatteoThe proposed space-based solar power (SBSP) system leverages state-of-the-art techniques in power management, photovoltaic (PV) efficiency, and antenna design. The principal objective of the mission is to exploit solar intensity in space at 1361 W/m² to generate and transmit 2 GW of power to Earth non-stop, employing a 37% PV efficiency and a concentrator with a concentration factor of 7.5 suns to effectuate a sustainable energy source. Given the escalating global energy demands and the imperative to transition away from fossil fuels, this goal is significant. The design approach is characterized by detailed calculations and optimizations across various sections, such as solar photovoltaics, microwave antennas, and DC-to-DC system efficiency. Antenna designs are carefully specified with relay and collector frequencies at 2.45 and 30 GHz respectively, incorporating substantial areas of 17.671 x105 m² and 1.7349 x105 m². A total system mass of 155,809 tonnes is methodically distributed among collectors, relays, and other integral parts, maintaining an equilibrium that ensures functionality and integrity. Alongside the novelty consideration of inflatable antennas that will see a mass reduction of the system to 57643 tonnes, which is a 62% drop in antenna mass. The system integrates 10 collectors that can generate 10 GW of power and a relay that will transmit the power to a ground station on Earth. The project also employs concentrated solar intensity measures and innovative frequency adaptations for microwave efficiency. Integrating these components into a coherent system represents a forward-thinking application of engineering principles. By synergizing rigorous scientific methodology and practical considerations, the project lays a foundation for future advancements in space energy systems. It epitomizes an intersection of theoretical robustness and real-world applicability that serves as blueprint for subsequent endeavors in renewable energy.24 0Item Restricted Design and Implementation of a RISC Microprocessor(Saudi Digital Library, 2023-11-21) Aljishi, Hadi Fadel A; Khursheed, SaqibThe demand for compact, high-speed, and energy-efficient computing systems has made the innovation and advancement of microprocessor designs increasingly vital. This project concerns the evelopment of a fully-featured Reduced Instruction Set Computer microprocessor on an FPGA. A practical instruction set was chosen and used as the basis for a datapath design. Implementation was done on the Cyclone II featured on the Altera DE2 board. Two basic implementations were created based on internal and external memory. The maximum achievable clock frequency was determined to be 63.32 MHz for the internal memory implantation and 44.32 MHz for the external memory implementation. A third implementation featuring a multiplier and a floating-point unit was then developed which achieves a maximum clock frequency of 26.16 MHz and a total power consumption of 41.06 mW. Several programs were written using the new instruction set to test the three implementations, and all produced the expected outputs. However, some areas of the design and testing methodology could be improved.37 0