ANALYTICAL METHOD OF SIZING PHOTOVOLTAIC WATER PUMPING SYSTEM

2019 Fourteenth International Conference on Ecological Vehicles and Renewable Energies (EVER), 2019

Recently we have developed a model of photovoltaic water pumping systems (PVWPS) for domestic water access in poor rural areas. In this article, we perform a sensitivity analysis over the 14 parameters of this model. We study how the variation of the parameters value influences the model output and the optimal sizing obtained from the model, for both the dry and the wet season. Results indicate that the peak power of the photovoltaic modules, the efficiency of the motor-pump and the tank volume have the highest impact on the model output. Besides, the parameters which significantly influence the optimal sizing are the position of the water entry in the tank, the position of the stop level of the float switch, the distance between the stop and restart levels of the float switch, the height between the floor and the bottom of the tank, and the static water level in the borehole. Finally, the thermal parameters of the PV modules and the hydraulic losses have a small impact on the model output and on the optimal sizing. This study can be useful to companies, governments and non-governmental organizations which install PVWPS for domestic water access. It can help them to determine the accuracy at which a given parameter has to be known to correctly model or size these systems. It can also allow them to evaluate the robustness of PVWPS sizing to parameters variation with time. Finally, it may guide the choice of components made by PVWPS installers.

International Journal of Sustainable Energy, 2017

With the decline in price of the photovoltaics (PVs) their use as a power source for water pumping is the most attractive solution instead of using diesel generators or electric motors driven by a grid system. In this paper, a method to design a PV pumping system is presented and discussed, which is then used to calculate the required size of the PV for an existing farm. Furthermore, the amount of carbon dioxide emissions saved by the use of PV water pumping system instead of using diesel-fuelled generators or electrical motor connected to the grid network is calculated. In addition, an experimental setup is developed for the PV water pumping system using both DC and AC motors with batteries. The experimental tests are used to validate the developed MATLAB model. This research work demonstrates that using the PV water pumping system is not only improving the living conditions in rural areas but it is also protecting the environment and can be a cost-effective application in remote locations.

Sustainable Energy Technologies and Assessments, 2013

The pumping for drinking water in the desert and remote areas in developing countries must be regarded as a priority and useful application. The use of photovoltaic as the power source for pumping water is one of the most promising areas in photovoltaic applications. The design of the pumping system is based upon two important elements: the PV array and the storage tank. In fact, a poor design of the PV array and/or the storage tank could affect system reliability and create a deficit of daily water demand for the population. To characterize the system design, we use a new method based on the determination of Loss of Power Supply Probability (LPSP) during the year around a cycle of operation. It is possible that the volume of water required by the load is higher than that delivered by the pump. In these conditions, the consumption is not satisfied and there is a water deficit. We showed that the size of the storage tank has an influence on the reliability and the system sizing and must be treated with particular attention. The life cycle cost (LCC) method is used to estimate the cost of the optimal configuration.

IEEE Transactions on Industry Applications, 2020

A sensitivity analysis is carried out on the parameters of a photovoltaic water pumping system (PVWPS) for domestic water supply in rural areas. The results show that the photovoltaic modules peak power, the motor-pump efficiency and the water tank volume strongly influence the system performance. This highlights that these parameters constitute judicious optimization variables. Besides, the cost of the motor-pump, the cost of the water tank and the lifetime of the PVWPS have the largest impact on the system cost. These 6 parameters are therefore of primary importance for the techno-economic optimal sizing of the system. Finally, it is shown that the hydraulic losses play a minor role and that it is not necessary to consider the evolution of the ambient temperature when modelling PVWPS for domestic water supply. This study can be useful to non-governmental organizations, companies and governments which install PVWPS for domestic water access. It can help them to determine the accuracy at which a given parameter has to be known to correctly model or size these systems. Besides, it can allow them to evaluate the robustness of PVWPS sizing to parameters variation with time and may guide their choice of components.

2019 IEEE 46th Photovoltaic Specialists Conference (PVSC), 2019

Photovoltaic water pumping systems (PVWPS) are an interesting solution to improve water access in off-grid areas. Irradiance being the main input of PVWPS models, the source (local sensor or satellite database) and temporal resolution of irradiance data strongly influence the accuracy of PVWPS models and the optimal sizing obtained from these models. We show that we can use satellite data instead of data from a local sensor and a temporal resolution of 1 hour without significantly changing the model accuracy and optimization results. These results can allow to intensify the implementation of PVWPS in off-grid areas.

Climate change has had perhaps the most adverse effect on African rural communities where we witness persistent droughts and erratic rain patterns. Peasants often have to walk many kilometres to fetch water of a suspect quality. In these circumstances underground water supplies provide the best hope for them. Often, however, water tables may have receded to such an extent that wells are not a practical proposition. Besides, water is needed not just for domestic use such as food preparation and cleaning, but also for livestock and watering of small gardens. In this paper we present methodology for sizing and designing a photovoltaic pumping system based on components available in Southern Africa. We also show that solar pumping technology has gone past the experimental and prototype stage. Further we strongly put forward the proposition that the technology has clearly matured and in terms of cost, is fast approaching that of choice over other technologies relying on the grid. Currently the region faces an energy shortage and we see not only electricity cuts but those customers that actually are supplied with electricity face increasing and unacceptable tariffs. To make it more convenient we have consolidated the design process in a Visual Basic tool which is easy to use and apply.

This paper recommends an optimal sizing model, to optimize the capacity sizes of different components of photovoltaic water pumping system (PWPS) using water tank storage. The recommended model takes into account the submodels of the pumping system and uses two optimization criteria, the loss of power supply probability (LPSP) concept for the reliability and the life cycle cost (LCC) for the economic evaluation.

2020

The research suggests a mathematical model which represents the performance of photovoltaic water pumping system. The suggested system is considered one of the best used systems for producing clean electric power that is necessary for operating water pumps. The proposed system has been extrapolated by using main mathematical equations which expressing the performance of pumping system's components which are represented the photovoltaic cells and the group of the water motor-pump. A Mat Lab/Simulink used to construct a same numerical model. The extracted results are the same from both model and these results approved their validity. The photovoltaic water pumping system includes permanent magnet DC motor (PMDM) that is fed directly by the photovoltaic cells. And the water pump used in this purposed system is (centrifugal) type. The mathematical models can be used generally for any place which their solar characteristic is known to determine the amount of water that can be pumped ...

PV water pumping technology is recognized as a sustainable and environmentally friendly solution to provide water for domestic use. The appropriate design and smooth operation mostly rely on available solar irradiation, domestic water demand and appropriate configuration of the proposed system. Therefore, the aim of this work is to examine an optimum PV system configuration that is capable of supplying a solar submersible pump system to fulfill domestic water needs of five isolated houses located in a Moroccan remote area. A detailed approach for the design of an optimized PV water pumping system based on real water usage data is proposed. Besides, system design work and performance assessment were carried out based on hourly climatic conditions. Overall, two approaches were investigated for an optimum design of the proposed system. Annual simulations indicated that the direct coupling, as a first option, appears to be unfitting configuration for water pumping in this case. In turn, results proved that second system including a MPPT DC converter with less PV arrays could pump more water and its performance remarkably surpassed the direct coupling configuration. In addition, economic analysis has shown that proposed systems are cost competitive against the conventional water supply methods.

The progress met in the world market of photovoltaics underlines the maturity of investments realized, guarantees the reliability of the technology utilized and designates the variety of applications in covering the energy demands of both stand-alone and grid connected consumers. Concerning stand-alone systems, the incorporation of photovoltaic systems in water pumping applications is thought to be one of the most popular and ideal uses of solar energy exploitation, especially under the common allegation of coincidence between insolation and water demand. In this study, an attempt to investigate the opportunities of a PV powered water pumping system able to meet additional -apart from the water pumpelectricity loads, results in the development of an optimum sizing methodology which is accordingly validated by experimental measurements. From the results obtained, it becomes clear that a properly designed PV-pumping configuration of 610 W p is capable of covering both the electricity (max 2 kWh/ day) and the water (max 400 L/h) management demands of a large variety of remote consumers.