Conceptual Development and CFD Evaluation of a High Efficiency – Variable Geometry Ejector for Use in Refrigeration Applications

摘要: Abstract Ejector based refrigeration cycles are an alternative to the sorption systems commonly associated with solar cooling since required high-pressure motive fluid can be generated heat. However, ejectors have been unable achieve commercial maturity due their low thermal efficiency and intolerance deviations from design point. In present work, ejector that implements variable geometry mechanisms is proposed evaluated using CFD simulations. order address issue, changes of current also discussed in terms its irreversibility sources; large momentum difference between primary secondary flows a well-known source. The resulting able operate more efficiently than designs while maintaining constant when subjected operating conditions.