This paper seeks to predict the performance of side channel pump by considering influences different wrapping angles. Firstly, three cases 1, 2 and 3 are modeled with angles 15°, 30° 45°, respectively. Secondly, physical parameters comprising exchanged mass flow, pressure velocity distributions plotted at best efficiency point (QBEP) analyze internal flow characteristics. Since exchange times depend on size angle, angle has significant effects head performance. Case 1 smallest recorded...

Abstract Hydropower has been the leading renewable source and cheapest ways to generate electrical energy in world. In recent years, there a major upsurge hydropower development because of use pump as turbine (PAT). However, operational reliability PAT is greatly affected by unsteady flow fields; therefore, it important examine behavior which can be used reference reduce noise, vibration, cavitation performance for centrifugal pumps working turbines. Thus, objective this study was evaluate...

This paper presents a multi-objective optimization strategy for pump-as-turbines (PAT), which relies on one-dimensional theory and analysis of geometrical parameters. In this strategy, theoretical model, considers all possible losses incurred (mainly by the components pipe inlet, impeller volute), has been put forward performance prediction centrifugal pumps operating as turbines (PAT). With established mathematical relationship between efficiency PAT (both at pump turbine mode) controlling...

Pump-as-turbine (PAT) technology permits two operating states—as a pump or turbine, depending on the demand. Nevertheless, designing geometrical components to suit these states has been an unending design issue, because of multi-conditions for PAT that must be attained enhance hydraulic performance. Also, known have narrow range and operates poorly at off-design conditions, due lack flow control device poor designs. Therefore, wider operate effectively geometric parameters need optimized....

Rotor-stator interaction (RSI) in the centrifugal pump-as-turbine (PAT) is a significant source of high amplitude pressure pulsation and flow-induced vibration, which detrimental to stable operation PAT. It therefore imperative analyze rotor-stator interaction, can subsequently be used as guideline for reducing output PAT noise, vibration cavitation. In addition, it important have wide operating range preferably at maximum efficiency. order broaden range, this work proposes multi-condition...

Energy plays a very important role more or less in every aspect of human life as well economic activities. It is one the sectors that play pivotal development county it helps easing reducing poverty through job creation and manufacturing supports infrastructural development. Renewable energy resources particularly hydropower remain main sources recent times to overcome demand globally reduce CO2 emissions other Greenhouse gases from generation. The produced such coal, geothermal, burning...

Operation of pump in reverse mode as turbines (PAT) can be useful producing inexpensive energy for rural settlements developing counties. Nonetheless, the optimal connection between Pump geometry and flow cannot held reserve when operating PAT a result, high instabilities are likely to occur. The under investigation is made up four blades with splitters operates at nominal head rate 12 m 12.5 m3/h respectively rotational speed n = 29,000 rpm. This study investigates transient characteristics...

Side channel pumps are important machines for handling toxic, explosive or other dangerous liquids in various engineering processes. However, the operational reliability of these is directly affected by intensity pressure and velocity fluctuations, thus flow fluctuations existing within pump cannot be neglected because their direct influence on noise, vibration harshness performance. Therefore, describing precisely zones highly unsteady turbulent fields a key research topic. Moreover, size...

In the field of hydroelectric power, Pump as Turbine (PaT) is an important tool to achieve recycling redundant kinetic energy in small stream/rivers. However, due contradiction between reverse fluid flow working at turbine mode and designed passage pump geometry, internal hydraulic loss PaT excessive. As a result, it renders performance extremely low affecting its wide applications with demand high efficiency operation. Therefore, this paper aims optimize geometric parameters impeller under...

Abstract The effect of the blade inlet angle on pump‐as‐turbine (PAT) has not been adequately investigated. hydraulic performance PAT was analyzed using an available test rig. accuracy numerical data established by comparative analysis experimental data. study demonstrated that as increases, so does performance, but only to a certain degree. required pressure head and shaft power increased with increase in angle. As compared volute outlet pipe, loss within impeller accounts for large portion...

With the rise in fuel prices as well energy cost, hydroelectric power is best alternative for generation rural industries and villages.Small hydropower (SHP) largest oldest source of renewable which converts flowing water into electricity.Small entering this field improving saving several developing countries through use pump reverse mode hydraulic turbine; turbine (PAT).It one alternatives that could meet needs by providing electricity villages settlements Southern Africa endowed with a...