Effect of valve opening on starting performance of pump as turbine.

PLoS One · 2023 · PMC10681215 · PMID 38011162

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a decreasing trendno p-value reported

For the low-speed start, the nominal acceleration time shows a decreasing trend with increasing valve opening.

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an increasing trendno p-value reported

With the increase of outlet valve opening of PAT, the head showed an increasing trend.

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a slight trendno p-value reported

With the valve openings increasing, the atypical startup process shows a slight trend of delay in the time required for inlet static pressure to rise to stable value during the medium and high-speed start.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.