In order to simulate the energy efficiency fluctuation behavior of an industrial centrifugal pump with a six-blade impeller, a full-scale three-dimensional (3D) an unsteady state computational fluid dynamics (CFD) model was used. Five operational points with different flow fluxes were numerically investigated by using the Navier–Stokes code with shear-stress transport (SST) k-ω turbulence model...

In this study, optimization of the impeller and design of volute were carried out in order to improve the performance of a centrifugal pump. Design parameters from vane plane development for impeller design were selected and effect of the design parameters on the performance of the pump was analyzed using CFD and Response Surface Method to optimized impeller. This study also proposed the optimi...

Abstract High‐temperature heat pumps (HTHPs) that can supply at temperatures and above 200°C have the potential to increase energy efficiency decrease carbon dioxide (CO 2 ) emissions in industrial processes. In this study, three reversed Rankine cycles using water vapor (R‐718) as working medium, with different intercooling strategies, were proposed their performance has been investigated. The...

Abstract The mechanical characteristics of the impeller are important indicators that determine working pump. pump is subjected to periodic hydraulic loads during process. This load will cause dynamic deformation and shaft, thereby further affecting distribution fluid. Liquid-solid coupling used. Method, rated operating point centrifugal analyzed, it proved stress shaft meets requirements, whic...

In order to promote the stability of centrifugal pump units and maximize role pumps, this paper analyzes composition basic working principle presents main concerns maintenance, finally investigates common faults maintenance methods pumps for reference.

Objective: Minimally invasive open heart surgery involves limited intrathoracic cannulation sites necessitating cardiopulmonary bypass to be initiated via peripheral access using percutaneous cannulae with the tip placed into the right atrial cavity. However, surgery involving the opening of the right heart obliges the surgeon to maintain the end of the cannulae into the vena cavae. The impeded...