Optimisation of the distribution of power from a photovoltaic generator between two pumps working in parallel

Gasque, Marı́a; González-Altozano, Pablo; Gutiérrez-Colomer, Rosa Penélope; García-Marí, Eugenio

doi:10.1016/j.solener.2020.01.013

Cited by 10 publications

(3 citation statements)

References 25 publications

(22 reference statements)

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“…GI thre_ * depends on the minimum power required to pump at a given head and increases with the pump head. The minimum power practically triples from pumping at a head of 24 m (0.26 kW) to a head of 54 m (0.73 kW) for the pump of 0.75 kW used in [52]. A greater value of TDH will increase GI thre_ * which will increase the amount of energy stored in the LIB while GI < GI thre_ * .…”

Section: Discussion Of the Experimental Results: Dpvwps Vs Pvwps + Libmentioning

confidence: 99%

Photovoltaic Water Pumping: Comparison Between Direct and Lithium Battery Solutions

et al. 2021

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This work presents the conversion of a photovoltaic water pumping system (PVWPS) to its corresponding battery-based solution, while maintaining the components of the PVWPS facility and adding the power converter needed to manage the operation of a lithium-ion battery. A complete analysis of the direct PVWPS is performed based on the values obtained by the monitoring system developed for the installation. The efficiencies and performance ratios of the various elements of the facility are calculated, as well as other relevant factors (such as irradiance thresholds). The dependence of some variables on the solar resource is analyzed to model the system. A similar study is carried out in the battery-based solution and a comparative analysis of the two modes of operation is then performed to find which aspects could be improved in the battery-based solution to increase the pumping time and total daily pumped volume. The results presented demonstrate the benefits of including a battery (reduction in start/stop cycles and improved performance on cloudy days). Aspects that can be improved to make the battery-based solution more efficient and achieve better results are suggested.INDEX TERMS Photovoltaic water pumping systems, lithium batteries, battery-based pumping, water pumping, stand-alone photovoltaic system, sustainable development goals.

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Section: Discussion Of the Experimental Results: Dpvwps Vs Pvwps + Libmentioning

confidence: 99%

Photovoltaic Water Pumping: Comparison Between Direct and Lithium Battery Solutions

et al. 2021

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“…The abundant availability of sunlight in many countries of the Mediterranean basin facilitates the use of photovoltaic (PV) energy to supply electricity to pumping facilities needed to irrigate many of the crops grown in these areas (Carrêlo 2014;López-Luque et al 2015;García-Tejero and Durán Zuazo 2018;Todde et al 2019;Hajjali et al 2022). For its part, the increase in photovoltaic generation capacity in Spain (Zafrilla et al 2019) and the reduction in the cost of solar panels have made their replacement of non-renewable energies increasingly attractive (Branker et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Optimization of an isolated photovoltaic water pumping system with technical–economic criteria in a water users association

et al. 2023

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With proper management, the modernization of irrigation systems makes it possible to improve the efficiency of application and use of water at the cost of an increase in pumping needs and, therefore, an increment of the energy consumed. The recent drastic price increase for energy put the viability of many farms at risk. In this context, using photovoltaic solar energy to power pumping stations has become an increasingly attractive alternative and a cheap and reliable option. The dimensioning of pumping systems powered by photovoltaic solar energy must be done considering the variability of solar radiation to take advantage of the available photovoltaic energy, especially during periods of less irradiation. By investigating a particular case, this paper studies the effect of increasing the number of pumps in parallel while maintaining the total power, as well as the relationship between the installed photovoltaic capacity and the power of the pumping system, to meet pumping requirements throughout the year. The pumped volume increased as the number of pumps installed in parallel increased for the same photovoltaic power generator. Although this increment has a limit, beyond which no greater significant rise in volume is achieved, installation costs increase. In addition, for the same pumping power installed, the required photovoltaic generator power decreases as the number of pumps in parallel increases. In the case studied, a 27% increase in the annual pumped volume was achieved by incrementing the number of pumps in parallel from one to five, thus leading to a 44.1% reduction in the size of the photovoltaic generator and a 13.3% reduction in the cost of installation compared with a system with only one pump. The procedure used to determine the most appropriate number of pumps to install in parallel when pumping water between two tanks, which minimizes the photovoltaic generator's size while guaranteeing pumping requirements, is easily generalizable for sizing isolated photovoltaic water pumping systems.

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“…Some contributions to this need can already be found in the literature. It is worth mentioning the work of [38] in which a method for distributing the available PV power between two equal pumps working in parallel was proposed. The authors concluded that the power distribution ratio between the two pumps to maximize the water flow rate is 0% or 50% (i.e., just one operating pump or two with half available PV power each).…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of Multipumping Photovoltaic Irrigation Systems

2022

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The growing market of large-power photovoltaic irrigation systems (PVISs)—made of systems with different and several motor pumps working in parallel—needs simulation tools capable to estimate their energy and water productivity. The objective of this paper is to present the simulation models developed for parallel multipump PVISs fed by a single PV generator. These models seek to maximize the instantaneous water flow rate according to the available PV power and were developed for the typical configurations of large-power irrigation facilities. The models present some advantages when compared with the current state of the art (in which a single motor pump connected to a 1/N fraction of the PV generator is simulated and the result is multiplied by N): in the case of negligible hydraulic friction losses, the use of the multipump model shows gains with respect to the state of the art; in the case of appreciable friction losses, the current state of the art overestimates the productivity of the systems. Then, the ability of these models to compare different multipump designs is shown: two groups of pumps working at variable frequencies show better performance than a group working at a variable frequency and a group at a nominal frequency—an 8% increase in the water pumped is seen.

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Optimisation of the distribution of power from a photovoltaic generator between two pumps working in parallel

Cited by 10 publications

References 25 publications

Photovoltaic Water Pumping: Comparison Between Direct and Lithium Battery Solutions

Photovoltaic Water Pumping: Comparison Between Direct and Lithium Battery Solutions

Optimization of an isolated photovoltaic water pumping system with technical–economic criteria in a water users association

Modeling and Simulation of Multipumping Photovoltaic Irrigation Systems

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