Electrical Power Quality Analysis and Hydraulic Performance for Photo Voltaic Surface Water Pumping Unit
Khaled Mohamed Kotb Fetyan
Issue:
Volume 3, Issue 3, June 2017
Pages:
40-62
Received:
13 August 2017
Accepted:
31 August 2017
Published:
1 November 2017
Abstract: Photovoltaic now used in new irrigation system as a source of renewable energy to run the pumps. It’s can be used in remote areas, which it’s very difficult and more expensive to establish power stations or to install transmission lines to connect these areas with the electrical grid. Surface pump can be used in modern irrigations systems and connected to PV power supply to save energy and water. In this paper a system contains 10 hp surface pump and 15 kW PV system uses to drive the pump unit are studied. The paper investigates mathematical models for surface PV pumping system component. The performance of this system is studied by using this mathematical model during a long time, and the effect of solar radiations values on the system performance is estimated. The paper introduced a simulations and experimental results of the PV pumping in daily hourly average during one year. A good agreement between the simulations results and experimental results are found. The paper investigates the overall performance foxing on the water flow rate values obtained from the unit during one year. Also the electrical power quality analysis of the AC voltage feeds for the pump unit are measured and calculated. Due to solar radiations variation during day hours, and during different months the electrical performance such as; voltage current, power and also harmonic contents is changed depends on the values of solar radiations. The electrical signals and power quality are measured on the field by using power quality devices in different days and statues of operations. The results showed that; during low radiations periods the voltage and frequency are varied in a constant relation to reduce the pump speed and hence reduce the water flow rate to be proportional to input energy come from the PV panels. In case of high solar radiations the inverter runs the pump at constant frequency values depend on pump specifications. And during clouds occurred the system is stopped.
Abstract: Photovoltaic now used in new irrigation system as a source of renewable energy to run the pumps. It’s can be used in remote areas, which it’s very difficult and more expensive to establish power stations or to install transmission lines to connect these areas with the electrical grid. Surface pump can be used in modern irrigations systems and conne...
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Thermal Vibration of Laminated Magnetostrictive Plates Without Shear Effects
Issue:
Volume 3, Issue 3, June 2017
Pages:
63-69
Received:
18 October 2016
Accepted:
27 October 2016
Published:
28 November 2017
Abstract: The study of laminated magnetostrictive plate without shear deformation under thermal vibration is calculated by using the generalized differential quadrature (GDQ) method. In the thermoelastic stress-strain relations that containing the linear temperature rise and the magnetostrictive coupling terms with velocity feedback control. The dynamic differential equations without shear deformation are normalized and discrete into the dynamic discretized equations with GDQ method. Four edges of rectangular laminated magnetostrictive plate with simply supported boundary conditions are considered. In the moderately thick plate of laminated magnetostrictive plate, the effect of shear deformation should be considered for the computational controlled values of transverse center deflection and dominated normal stress.
Abstract: The study of laminated magnetostrictive plate without shear deformation under thermal vibration is calculated by using the generalized differential quadrature (GDQ) method. In the thermoelastic stress-strain relations that containing the linear temperature rise and the magnetostrictive coupling terms with velocity feedback control. The dynamic diff...
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