Centrifugal pumps are superior to roller pumps for extended support durations in terms of pump-induced haemolysis. In this study, we evaluated the commonly used Biomedicus BP 50 and compared it with the Jostra Rotaflow and a standard roller pump in an in vitro test circuit. Each circuit was run for a six-day period and repeated five times. Plasma haemoglobin values showed the roller pump to bec...

Abstract—This paper presents an overall study of Feedback Control of Z-Source Converter Fed Separately excited DC motor with centrifugal Pump Set. Z-source converter can be used for both voltage buck and boost mode using LC impedance network. In this paper the dynamic modeling of Z-source with motor load and centrifugal pump set is carried out with new findings. The compensators for speed feedb...

This paper deals with the combination of system identiica-tion and robust controller design. Recent results on estimation of frequency domain model uncertainty are utilized in robust analysis and controller design using. It is shown how estimated frequency domain uncertainty ellipses may be represented within the general-framework using a mixed perturbation set. A methodology for synthesizing o...

The objective of this study was to examine the interaction of cardiopulmonary bypass venous air with assisted venous drainage, focusing on its production of gaseous microemboli in the arterial line. An in-vitro recirculating cardiopulmonary bypass circuit containing fresh whole bovine blood was monitored with a pulsed-doppler microbubble detector. Air of specific amounts was injected into the v...

The demand for higher efficiencies and performance of modern centrifugal turbomachinery requires improved knowledge of critical design factors in strength of materials, aerodynamics, and rotordynamics. While tremendous strides in finite element stress analysis and computational fluid dynamics (CFD) have addressed the first two areas, the lack of accurate prediction tools for centrifugal impelle...

Aiming at the problems of low working efficiency and high energy loss in operation centrifugal pump, an intelligent algorithm for pump design was proposed. On basis hydraulic design, a multi-objective optimization mathematical model established. A Genetic (GA) designed to optimize major structural parameters optimal combination obtained. Calculation results suggested that optimized significantl...

The article presents the results of research devoted to design and numerical calculation a low-flow high-head centrifugal pump with Barske-type impeller using computer simulation methods. main features fluid flow hydrodynamics, as well influence number geometry on energy cavitation characteristics pump, are found. focus is analysis end gap between blades casing, qualities pump. issue different ...

Purpose: Centrifugal pumps are prone to vibration problems during operation due poor dynamic characteristics of its impellers that serve as the only running parts such devices; impeller main reasons for centrifugal pump. Therefore, it is important study internal fluid flow and influence on pump explore causes transient start-up process. The understanding phenomena may lead better design impelle...

PV array is increasingly employed for water pumping system. In this paper, the developed boost converter steps up the voltage produced by the PV array to a value which is suitable to run a single-phase induction motor. The inverter converts DC to AC is controlled by using sinusoidal pulse width modulation (SPWM) technique. By using a LCfilter the harmonics are eliminated and pure sine wave is o...