Operation Theory of Wind Pumps

Siddig, Mohammed Hashim

doi:10.1260/0309-524x.34.4.361

Cited by 2 publications

(10 citation statements)

References 2 publications

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“…The expression for the torque coefficient, C T in terms of the system constants and the wind-pump's Froude number, was formulated in [1] as…”

Section: Discussionmentioning

confidence: 99%

“…In Ref. [1], a detailed analysis of the performance of conventional wind pumps based on the mathematical model proposed, was reported. This performance shall be compared here to the results predicted for the optimized design based on the variable stroke technique.…”

Section: Comparison Of Variable-stroke and Fixed-stroke Performancementioning

confidence: 99%

“…The study of the wind-pump's theory presented in the earlier paper, [1], opens the door for the development of a wind-pump system design based on sound theoretical bases rather than mere empirical formulations.…”

Section: Introductionmentioning

confidence: 99%

“…The design options to be presented shall be shown to address the long acknowledged mismatch between the driving and driven components of the wind-pump. These mismatches were discussed by numerous researchers [1,2,3]. The most viable of the mitigation techniques suggested concentrated on the variation of the stroke length as the parameter experimentally known to influence output [2].…”

Section: Introductionmentioning

confidence: 99%

“…This work develops a criterion that forms the quantitative link between the system's variables, namely the wind speed and the water head on one side and the system's characteristics on the other. This could not have been realized without the recognition of Froude number as the independent variable controlling the wind pump [1].…”

Section: Introductionmentioning

confidence: 99%

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Operation Theory of Wind Pumps (2)

Siddig

2010

Wind Engineering

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Following on a preceding paper of the same title [1], and the establishment of the dependence of the wind-pump performance on the wind-pump's Froude number, υ/√ gh, an analytical analysis of the wind-pump's design parameters is further developed in this work. The result was the formulation of the system criteria that continuously match the load with the varying wind speed and water head. This led to a design procedure that entails variation of the pump stroke, the rotational speed-ratio or the turbine's pitch angle to sustain a continuous peak performance. The stroke and speed-ratio variations are such that any of them is continuously proportional to the square of the wind-pump's Froude number. The pitch-angle variation technique requires an inverse relation between the design torque-coefficient and the square of Froude number. The suggested power maximization techniques lead to the continuous operation of the turbine at its maximum power-coefficient point, as long as the operational Froude number is above its stop limit. The arrangements have the implicit advantage of minimizing the start and stop wind speeds of the wind pump.

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“…The expression for the torque coefficient, C T in terms of the system constants and the wind-pump's Froude number, was formulated in [1] as…”

Section: Discussionmentioning

confidence: 99%

Section: Comparison Of Variable-stroke and Fixed-stroke Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Operation Theory of Wind Pumps (2)

Siddig

2010

Wind Engineering

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Optimization of large-scale wind-powered centrifugal pumps

Siddig

2018

Wind Engineering

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A study on the optimal matching of centrifugal pumps and large-scale wind turbines is reported. The study includes mathematical modelling of the performance of high-capacity centrifugal pumps when matched with efficient high-speed low-solidity wind turbines. The dependence of the performance of wind pumps on the dimensionless parameter v/√( gh), termed the wind pump’s Froude number, was fully analysed. Similar to earlier reported results on wind-powered piston pumps, analysis is showing that the wind pump’s Froude number is the dominant independent dimensionless parameter that fully defines the system’s performance. Operation with continuous variable transmission was analysed and shown to optimize the wind pump’s performance, particularly at medium and low wind speeds. The optimum relation between the required gearbox transmission ratio and Froude number of a wind-powered centrifugal pump was analytically established for three different pumps. In addition to continuous variable transmission operation, the analysis helps in optimally sizing constant transmission ratio systems.

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Operation Theory of Wind Pumps

Cited by 2 publications

References 2 publications

Operation Theory of Wind Pumps (2)

Operation Theory of Wind Pumps (2)

Optimization of large-scale wind-powered centrifugal pumps

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