| || || Prasad, Rajneel S.|
| || || Design, construction and yield analysis of a 1.2KW standalone photovoltaic system|
Author:Prasad, Rajneel S.
Institution: University of the South Pacific.
Subject: Photovoltaic power systems -- Fiji -- Design and construction, Photovoltaic power generation -- Fiji -- Design and construction
Call No.: pac TK 1087 .P732 2013
Copyright:Under 10% of this thesis may be copied without the authors written permission
Abstract: Photovoltaic (PV) energy generation is in continuous increase round the globe due to fossil fuel depletion, fuel price hikes and the need for energy generation from cleaner sources. Moreover, sometimes PV energy generation is the only feasible alternative to supply electricity in remote areas which are separated by long distances and ocean. The main objective of the study is to design, construct and monitor two optimum stand-alone photovoltaic (SAPV) systems that can satisfy lighting and laptop charging demands of the student fales1. The study aims to verify the actual performance of the designed SAPV systems with the simulated performance results. This study also intends to provide SAPV system performance data for Fiji and develop a pathway for future SAPV systems by providing SAPV system performance data under field conditions. Furthermore, a sensitivity analysis was carried out to determine the future prospects of SAPV system under varying economical, environment and operating conditions. The SAPV system was designed using HOMERTM, Solar Design Studio 6.0TM and PV systTM, and the SAPV component performance data of inverter, charge controller, battery and PV module was obtained by using standard SAPV component testing procedures. In designing an optimum SAPV system, a complete solar resource assessment was carried out using 10 years meteorological data and the shading patterns within the vicinity of the fales. The performance of the SAPV system was monitored by a DELL computer and CR23X datalogger at the project site. The optimal orientation of the SAPV system are 15-20° tilt and 330-350° azimuth from true north with annual solar access of 90.3% to direct radiation on a clear day. For both the SAPV systems, the monthly average daily final yield (Yf) and performance ratio (PR) range from 3.5-4.2 kWh/kWp and 65.4-81.3% respectively. 1 A fale or a bure is a traditional Fijian meeting place. At USP a numbers of fales to had been built to serve as student study areas. iv The internal rate of return (IRR) of the lighting system is 1.5% and for the laptop charging system is 1.3%. Based on 2010 pricing of PV components, the levelized costs of energy (LCOE) are $0.96/kWh and $1.05/kWh for light and laptop system respectively. The payback times for the two systems are 22.4 and 22.7 years considering the relatively low cost of electricity in Fiji. The actual performance analysis of SAPV system (each 625Wp) shows that the normalized annual energy delivered to the load from light and laptop systems are 761.1 kWh/year and 779.4 kWh/year respectively. Eight dimensional sensitivity analysis of economic feasibility based on initial system cost and environmental parameters that drive the energy generation delineates that LCOE is a strong function of initial capital cost and global radiation at the project site. The sensitivity analysis shows the pathways that would make SAPV system competitive in the energy generation market in Fiji.