About 20% of the electricity produced in the world is consumed in rotary equipment for conveying fluids such as water, gas, air, and other liquids, while the loss of energy consumption in this sector is more than 60%. The aim of this study is to evaluate different efficiencies in the pumping stations in the pressurized irrigation systems to address low energy efficiency issues in the pump stati...

Laboratory demonstrations of spontaneous photoelectrochemical (PEC) solar water splitting cells are reviewed. Reported solar-to-hydrogen (STH) conversion efficiencies range from o1% to 18%. The demonstrations are categorized by the number of photovoltaic junctions employed (2 or 3), photovoltaic junction type (solid–solid or solid–liquid) and the ability of the systems to produce separated reac...

which water is pumped from the oropharyngeal chamber, across the gills and into the parabranchial chambers. At the same time, blood is pumped through the gills, where it picks up oxygen from the water and loses carbon dioxide. The movement of water across the gills involves the action of two pumps: a pressure pump that pushes water across the gills from the oropharyngeal to the parabranchial ca...

Simple, cheap, and efficient water pumps are needed in developing countries. A reciprocating pump driven by a switched reluctance linear tubular motor with double pistons that can be supplied from photovoltaic power source seems to respond this demand. This type of new (one motion) is presented the paper. In order develop strong driving force at two extreme piston positions achieve long stroke,...

This paper deals with the design and performance analysis of centrifugal pump. In this paper, centrifugal pump is analyzed by using a single-stage end suction centrifugal pump. Two main components of a centrifugal pump are the impeller and the casing. The impeller is a rotating component and the casing is a stationary component. In centrifugal pump, water enters axially through the impeller eye...

A wave driven sea-water pump which operates by resonance is described. Oscillations in the resonant and exhaust ducts perform similar to two mass-spring systems coupled by a third spring acting for the compression chamber. Performance of the pump is optimized by means of a variable volume air compression chamber (patents pending) which tunes the system to the incoming wave frequency. Wave tank ...

1 Description of the Model This case study is related to our CAV paper [4]. We consider a model of a water level control system using wireless sensors. This model is an extension of the one described in [1]. Values submitted are thus subject to probabilistic delays, due to the unreliable transport medium. A sketch of the model is given in Figure 1. The water level y of a Figure 1: CTMDP of the ...

The constraints in the path of sustainable, cost-effective, and efficient photovoltaic power supply to irrigation system remote areas are addressed this work. intrinsic thermal losses PV due high working temperature shading that caused by dirt mitigated through water cleaning mechanisms. Moreover, protection against lightning strikes surges is assimilated ensure durability system. Lastly, cost ...