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Showing 1 to 7 of 7 for “"positive displacement pump"”.
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One-dimensional positive displacement pump description in cavitating conditions
… a new mathematicalalgorithm to model complex pump systems, capturing cavitationand pump behaviour. The approach consists of the solution of the hyperbolicwave equation, including compressibility and multiphase conditions.The second phase contains non-condensable gas and vapour formation, …
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A device for the treatment of adult Sleep Apnea Syndrome
An electronically-controlled positive-displacement bellows-type air pump has been developed in the Bio-medical Engineering Laboratory for the treatment of adult Sleep Apnea Syndrome (SAS). An electronically-controlled positive-displacement pump has been employed in order to eliminate the pressure …
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Parametrization of Triple Screw Pumps for Aerospace Applications
<p>Triple Screw Pumps, a form of positive displacement pump, offer steady, high-pressure flow. In very small launch vehicles or upper stages turbopumps are not practical. This paper examines the performance of triple screw pumps to determine if they may serve as an alternative to turbopumps for use …
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The effect of wind fluctuations on the membrane of a stand-alone wind powered seawater Reverse Osmosis (RO) desalination unit
… from GUNT Hamburg company. A variable speed positive displacement pump and two actuated step motor valves were applied in the rig to facilitate the required wind fluctuations. At the first stage of this research, some initial experiments were accomplished to find the basic requirements of the …
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Why do mosquitoes use two modes of drinking? An analytical test of a blockage clearing hypothesis
Mosquitoes drink using a pair of in-line muscular pumps in the head that draw liquid food through a long drinking channel termed as proboscis. Experimental investigations of mosquito drinking using synchrotron x-ray indicate two modes of drinking, a predominantly occurring continuous mode in which …
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The design and optimization of a system using an induction motor driven pump, powered by solar panels
… evaluation of an induction motor driven water pumping system which is powered by solar panels. The system consists of a positive displacement pump, solar panels and an induction motor with a microprocessor controlled inverter. The reason that an induction motor has been chosen for the project …
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Photovoltaic water pumping : a case study in Kwazulu
… and appropriateness of photovoltaic (PV) water pumping in South Africa. It is a case study of the operation of a PV water pumping system installed in a rural community vegetable garden in KwaZulu. The system comprised a 574 WP array, DC power maximizer, DC motor and a Mono (positive …