Design of centrifugal compressors for heat pump systems

Abstract

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Heat pump working fluid selection—economic and thermodynamic comparison of criteria and boundary conditions

“…The exact thermodynamic and economic performance is however dependent on the final design of components, as e.g. the different fluids show different reachable isentropic efficiencies, as described by Meroni et al (2018), or might differently compensate pressure drops induced by the heat exchanger equipment, as described by Mancini et al (2018). Appropriate analyses for addressing these aspects are numerically demanding and would exceed both the acceptable effort as well as the required accuracy of a preliminary screening analysis.…”

Metodología de diseño y dinámica computacional de fluido del impulsor y voluta de un compresor centrífugo

“…En este artículo se muestra la combinación de las metodologías de Aungier [2], [3] y Lüdtke [4] para el diseño de impulsores centrífugos, con el fin de disminuir el uso de suposiciones e interpolaciones gráficas. Un trabajo de combinación de metodologías disponibles fue realizado por Meroni, et al [5] demostrando la viabilidad del proceso al mantenerse una compatibilidad de las metodologías; sin embargo, su trabajo se enfocó en el diseño de un compresor centrífugo y no en la creación de una nueva metodología. Algunas metodologías modernas para el diseño de los impulsores centrífugos usan algoritmos de diseño genético por ejemplo Casey et al [6], por su parte, Chu et al [7] presenta el uso de un algoritmo genético que predice el comportamiento de un compresor centrífugo.…”

“…Algunos investigadores como Mojaddam, Et al [1],. Aungier[2], Lüdtke[4], Meroni Et al [5],. confían en definir 3 ángulos de entrada para obtener por completo el perfil del aspa.…”

Performance improvement of a high-speed aero-fuel centrifugal pump through active inlet injector

“…Some of the investigations are successfully applied in engineering practice. 15,16 However, with the fast growth of computer technology, 17,18 numerical simulations with computational fluid dynamics (CFD) approaches have been gradually used in the design method to reduce the cost of the trial-and-error process, which can serve for engineers to capture quite accurate information and obtain a thorough performance evaluation. 19 For the high-speed aero-fuel centrifugal pump, the unsteady flow structure is the main source causing unstable operation, and it produces the hydraulic loss and affects the pump performance.…”