Low-Cost Thermal Management System for High Power X-Ray Optics
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42 ENGINEERING↗
Engineering topics
Van Velson, Nathan
Publications and source records attributed to Van Velson, Nathan.
Thermally Enhanced Obstructed Flow Board for Hot Spot Mitigation
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Concentrating solar power, CSP, falling particle r↗
Loop Thermosyphon Enhanced Solar Collector
A two-phase loop thermosyphon solar collector was developed to transfer thermal energy efficiently and passively from a concentrated solar collector to a thermal desalination process. The two-phase flow in the loop thermosyphon is driven by a difference in gravitational pressure head between the liquid return line and the two-phase riser located between the evaporator and condenser. A numerical model incorporating mass, energy, and pressure drop balances was developed to predict system performance and use as a design tool. Three iterations of loop thermosyphon solar collectors were designed, fabricated, and tested to validate the numerical analysis and demonstrate system integration. Additionally, a novel solar receiver design was evaluated based on volumetric absorption of the concentrated sunlight by an optically absorptive two-phase working fluid. Life tests were performed to evaluate the working fluid thermal stability and resistance to ultraviolet degradation. A glass receiver tube and associated glass-to-metal junctions were developed. Finally, a full-scale loop thermosyphon was integrated with a parabolic trough solar collector and tested on-sun.
14 SOLAR ENERGY↗