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Optimum Sizing and Economic Analysis of Standalone PV System with a Small Size Grinding Mill

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Document pages: 13 pages

Abstract: This work presents the results ofthe characterization of a standalone photovoltaic system for theelectrification of a household located in rural area in the western region ofCameroon: Nziih-Bafou in Dschang (5.35°N, 10.05°E and 1900 m). In order to copewith the maintenance charges and reduce the investment cost, a small mill wasadded to the appliances of the household for income generation. The assessmentof the energy demand was made by taking into account the reactive energy due tothe heavy consumption of energy by the mill’s motor, especially during ignition.The sizing of all the system’s components was carried out with the prospect ofdetermining an optimum design in accordance with daily electricity demand, siteirradiance profile and climatic conditions. In this context, tilt anglesapplicable to the PV structure and that allow to receive the maximum irradiance as a function of the periods of theyear were determined using the Hay model. This approach provides the system with incident irradiance greater thanor at the limit equal to that received by a horizontal surface on the same site compared to the case of a single tilt angle where the irradiance on theinclined plane is often lower than that on the horizontal. The economic analysis of the PV system showed an initial cost of $4448 and the Life Cost Cycle amounted to $24,495. This amount corresponds toa present cost per kilowatt hour of $0.44. The Net Present Value (NPV) of the project ($7793) over its lifetime (20 years) shows a payback period of less than 4 years.

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