Modern Developments in the Use of Large Single-entry Centrifugal Pumps

Anderson, Harold

doi:10.1243/pime_proc_1955_169_025_02

Cited by 25 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is one passage with two opposite flows and rotating directions. Using area ratio method [5,13] correlation passage between direct and reverse modes of a centrifugal pump may be found. To calculate head, discharge and efficiency of PAT at BEP, hydraulic losses in volute and impeller, mechanical losses related to power losses due to gland packing and bearing cases, disc friction losses in gaps between rotor and stator, volumetric losses related to leakage from clearances between rotor and stator shall be detected.…”

Section: Theoretical Analysismentioning

confidence: 99%

See 1 more Smart Citation

Theoretical, numerical and experimental investigation of centrifugal pumps in reverse operation

Derakhshan

Nourbakhsh

2008

Experimental Thermal and Fluid Science

168

View full text Add to dashboard Cite

Section: Theoretical Analysismentioning

confidence: 99%

“…In this paper, the best efficiency point of an industrial centrifugal pump running as turbine was achieved using theoretical analysis based on ''area ratio" method developed by Williams [5] and Anderson [13]. This method estimates turbine mode hydraulic components based on pump characteristics.…”

Section: Introductionmentioning

confidence: 99%

Theoretical, numerical and experimental investigation of centrifugal pumps in reverse operation

Derakhshan

Nourbakhsh

2008

Experimental Thermal and Fluid Science

168

View full text Add to dashboard Cite

“…Derakhshan and Nourbakhsh 30 developed a mathematical relationship (in equation (11)) to predict the BEP of PAT by applying the “area ratio” technique developed by Anderson, 76 and the BEP of the centrifugal pump was acquired through theoretical study, while the discharge, head, power, and efficiency of PAT at BEP were calculated through pump geometry and hydraulic characteristics. It was established that the values predicted by this method were slightly lesser than the experimental data…”

Section: Theoretical Investigations On Patmentioning

confidence: 99%

“…Burton and Mulugeta 77 also applied the area ratio theory developed by Anderson, 76 which stated that the ratio ( Y ) of area between the impeller blades at exit to the throat area of volute is the single most important factor in explaining the characteristics of the pump area ratio where ( Y ) is defined as…”

Section: Theoretical Investigations On Patmentioning

confidence: 99%

Geometrical effects on performance and inner flow characteristics of a pump-as-turbine: A review

Asomani

Yuan

Wang

et al. 2020

Advances in Mechanical Engineering

View full text Add to dashboard Cite

A pump-as-turbine is a hydraulic machine that can operate as a pump and turbine at the same time. Pump-as-turbine happens to be the most appropriate method for meeting the world’s energy demands, particularly in rural and isolated areas of a country. Furthermore, the operating cost of microhydropower systems is lower compared to conventional hydrodynamic turbines, but it requires high initial investment. Pump-as-turbine has been applied in many engineering fields such as irrigation, sewage, reverse osmosis, water distribution systems, farms, small pump storage power house, and pressure dropping valves. However, pump-as-turbine operates inefficiently at part-load due to lack of flow control device. In addition, the pump generates high flow instabilities in pump-as-turbine mode due to the shift of the best efficiency point toward higher head and discharge. This study extensively discusses the flow mechanism, modifications, and flow instabilities in the pump-as-turbine mode operation. First, the mechanism of the pump-as-turbine can be described as drawing out mechanical energy from the flow in the reverse mode. Since the energy drawn mainly depends on the major hydraulic components of the pump (impeller and volute), many studies have been conducted on the impeller and volute. It can be concluded that high amount of hydraulic losses is generated in pump-as-turbine mode operation. This can partly be attributed to the fixed geometrical parameters such as the stationary volute. To increase the usage of pump-as-turbine, it is very crucial to predict their performance in advance before manufacturing, which requires the understanding of the flow behavior as a result of geometrical parameters. In order to improve the energy conversion and understand the flow behavior in the centrifugal pump functioning as pump-as-turbine, the key geometrical parameters should be carefully designed. The designs of the main geometrical parameters do affect not only the hydraulic performance of pump-as-turbine but also the operational instability. The operational instability of hydraulic machines mainly depends on the pressure and the velocity fluctuation intensity generated within the flow passage as a result of the impeller–volute interaction. The magnitudes of the instabilities have the tendency to cause noise, vibration, harshness, and cavitation which reduces the life span of the hydraulic machine. Moreover, appropriate selection of the pump and unavailability of pump data contribute to the challenges faced. Finally, this review proposes specific solutions in terms of geometrical modifications and improvement of the computational design methods to handle the hydraulic losses faced during the pump operation; thus, this study can serve as a point of reference for a pump-as-turbine performance optimization.

show abstract

Hydrodynamics and Cavitation of Pumps

Brennen

2007

Fluid Dynamics of Cavitation and Cavitating Turbopumps

View full text Add to dashboard Cite

Modern Developments in the Use of Large Single-entry Centrifugal Pumps

Cited by 25 publications

References 0 publications

Theoretical, numerical and experimental investigation of centrifugal pumps in reverse operation

Theoretical, numerical and experimental investigation of centrifugal pumps in reverse operation

Geometrical effects on performance and inner flow characteristics of a pump-as-turbine: A review

Hydrodynamics and Cavitation of Pumps

Contact Info

Product

Resources

About