scholarly journals Comparação entre sistemas fotovoltaicos em modo fixo e com seguidor em uma instituição pública de ensino no Nordeste do Brasil

2019 ◽  
Vol 1 (46) ◽  
pp. 182
Author(s):  
Baldoino Sonildo Nóbrega ◽  
Waleria Guerreiro Lima ◽  
Raphael Henrique Falcão de Melo ◽  
Edvan Cruz Aguiar ◽  
Rute Cavalcante Pereira ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Energy Production ◽  
Model Simulation ◽  
Tracking System ◽  
Electric Energy ◽  
Simulation Software ◽  
Financial Viability ◽  
Photovoltaic Systems ◽  
Financial Indicators ◽  
Fixed System

<p>The present work has the objective of presenting a fixed and solar tracker photovoltaic systems comparative study, through the technical and financial viability evaluation in a public education institution located in the backlands of the state of Paraíba (Brazil). Through a System Advisor Model simulation software, we estimated the electrical energy production of the systems. Then, we performed a statistical analysis to evaluate the differences between the energy production of the proposed systems. Finally, financial indicators were used to assess which system had better financial viability. The results on performance have shown that the annual production of electric energy for photovoltaic systems with tracking is 32% higher than the fixed system. Statistical analysis proved by hypothesis testing that there is evidence that the tracking system produces more electric energy in relation to the fixed system. As for financial evaluation, the fixed system was more advantageous, since its financial indicators were better in all aspects. The research contributed to a better understanding of the differences between photovoltaic systems in terms of technical, financial and statistical aspects, which may help the decision making when choosing the installation of these systems in the region which is being studied.</p>

scholarly journals Analysis of possibilities to improve quality of spatial wind speed forecasts for efficient forecasting of electric energy production in onshore wind farms in Poland

2019 ◽  
Vol 84 ◽  
pp. 01001
Author(s):  
Paweł Piotrowski ◽  
Dariusz Baczyński ◽  
Marcin Kopyt ◽  
Karolina Szafranek
Keyword(s):  
Statistical Analysis ◽  
Wind Speed ◽  
Energy Production ◽  
Meteorological Data ◽  
Electric Energy ◽  
Wind Farms ◽  
Bilinear Method ◽  
Explanatory Variables ◽  
Forecasting Methods

The most important factor responsible for the quality of energy production forecasts in wind farms is the accurate wind speed forecast. An extensive statistical analysis of meteorological data (NWP) from 16 base nodes of the "300" grid in the "Łódź" area was made. The intention of the statistical analysis was to select potential explanatory variables for models predicting wind speed in the remaining 206 nodes of the grid’s mesh. Next, tests of selected prognostic methods were performed in order to compare their effectiveness with bilinear method which is not computationally complex. It should be emphasized that the main problem in spatial wind speed forecasting is the very large number of nodes for which the forecasts are calculated. As a consequence, more advanced and computationally complex forecasting methods cannot be applied in practice due to too long calculations time and difficulties in huge amounts of data processing. Conclusions with proposals of preferred forecasting methods that could be used in practice were developed.

Techno-Economic Study of Installing 10 MW PV Power Plant in Sudan

2016 ◽  
Author(s):  
Ahmed Abuelyamen ◽  
Mohand H. Mohamed
Keyword(s):  
Power Plant ◽  
Solar Radiation ◽  
Financial Analysis ◽  
Tracking System ◽  
Electric Energy ◽  
High Ratio ◽  
Climatic Data ◽  
Solar Pv ◽  
Ghg Reduction ◽  
Fixed System

This work investigates the installation of a 10 MW solar PV power plant in a sustainable city in Sudan. Initially, the climatic data such as relative humidity, temperature and horizontal solar radiation over 30 cities in Sudan were collected from NASA web page, then the behavior of all climatic data was analyzed. Annual daily solar radiation on a tilted surface was also calculated over the 30 locations around the country. It was found that the maximum value of tilted average solar radiation is 6.61 KWh/day at Dungola from fixed mode and 8.93 kWh/m2/day from tracking mode. Consequently, the location was selected as an optimum spot for building the solar PV power plant. Additionally, the available solar PV panels on the market were judged according to the maximum module efficiency and high ratio value of module capacity to frame area. The project lifetime is considered as 25 years. RETScreen v.4 software was used to simulate the feasibility analysis of the project based on electric power generated from fixed and tracking modes of operation, financial analysis and greenhouse gas emissions. The study showed that, technically, the proposed plant can generate up to 16.209 GWh of electric energy annually from the fixed system and 21.828 GWh from the tracking system. Environmentally, the annual net GHG reduction is 16,000 and 21,600 tons of CO2 from fixed and tracking systems respectively. From a financial standpoint, the cost-effective indicators were calculated and it was found that the IRR and payback period for the fixed system plant were 0.6% and 23.6 years, respectively. While for tracking system plant, figures were 2.66% and 19.4 years, respectively.

scholarly journals Empirical Evaluation of Fixed and Single-Axis Tracking Photovoltaic System: Case of ASHRAE Solar Radiation Modelling for Medina, Saudi Arabia

2021 ◽  
Vol 9 (3) ◽  
pp. 33-38
Author(s):  
Raed Alahmdi ◽  
◽  
Abdulrahman Alansari ◽  
Mohanad Abualkhair ◽  
Abdulrahman Almoghamisi ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Energy Production ◽  
Tracking System ◽  
Empirical Evaluation ◽  
Photovoltaic System ◽  
Energy Output ◽  
Pv Panel ◽  
Two Systems ◽  
Radiation Modelling ◽  
Fixed System

The main problem in studying the feasibility of solar systems is the enormous gap between theory and experimental radiation intensity, so to get accurate results there is a need for studying energy production in the site of the system empirically. In this study, the energy production of both fixed PV panel system and the system with single-axis tracking were empirically evaluated in Medina, Saudi Arabia. The two systems had the same 270 Wp PV panel. The fixed system was tilted by 23.5 degrees, and the single-axis tracker was tilted by 26 degrees. Both systems had an azimuth angle of zero degrees. A closedloop three-points controller was used to control the tracker with 120 degrees rotation range. The two systems operated simultaneously in July, and the data were collected for 14 days. The empirical results showed that the tracker increased the generated energy by 48.5% during the testing period. As a comparing method, a modified ASHRAE model was used to estimate the increase in the panel's energy output with and without the single-axis tracker, and RMSE and MBE were calculated. It's been found that the experimental energy generation is 10%, 5% less than the estimation of the modified model for the fixed system and the tracking system, respectively. Finally, based on the analysis, it's been estimated that the singleaxis tracker will increase the generated energy by 22.5% yearly in Medina.

Energy Production of Different Types and Orientations of Photovoltaic Systems Under Outdoor Conditions

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
Sebastijan Seme ◽  
Jože Požun ◽  
Bojan Štumberger ◽  
Miralem Hadžiselimović
Keyword(s):  
Energy Production ◽  
Meteorological Parameters ◽  
Tracking System ◽  
Photovoltaic System ◽  
Solar Irradiation ◽  
Photovoltaic Systems ◽  
The South ◽  
Optimal Orientation ◽  
Different Types ◽  
The Impact

This work compares the energy production of different types and orientations of photovoltaic systems under the equal outdoor conditions over the 4-yr period in Slovenia. The following photovoltaic systems were analyzed: the fixed photovoltaic system oriented to the south tilted at 30 deg, the fixed photovoltaic system oriented to the east tilted at 30 deg, the single axis photovoltaic tracking system tilted at 30 deg, and the fixed photovoltaic system oriented to the south tilted at 15 deg. The same monocrystalline silicon (mc-Si) solar modules are used in the compared systems. The systems are installed in a radius of 20 m. This provides the same meteorological parameters during the measured period. The impact of orientation and inclination on energy production are evaluated. The analysis of the data obtained shows that the energy production of the photovoltaic systems depends on the solar irradiation, temperature of solar modules, efficiency of solar modules, and efficiency of dc-ac inverters. Based on the analysis and measurements for different photovoltaic systems, the optimal orientation and inclination are presented. The results for Slovenia show that the optimal orientation and inclination facing south tilted at 45 deg.

Statistical Analysis of the Smoothing Effect for Photovoltaic Systems in a Large Area

2010 ◽  
Vol 130 (5) ◽  
pp. 491-500 ◽  
Author(s):  
Takashi Oozeki ◽  
Takumi Takashima ◽  
Kenji Otani ◽  
Yoshihiro Hishikawa ◽  
Gentaro Koshimizu ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Photovoltaic Systems ◽  
Smoothing Effect ◽  
Large Area

scholarly journals Techno-economic feasibility analysis of a 3-kW PV system installation in Nepal

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Ramhari Poudyal ◽  
Pavel Loskot ◽  
Ranjan Parajuli
Keyword(s):  
Net Present Value ◽  
Meteorological Data ◽  
Electric Energy ◽  
Simulation Software ◽  
Economic Feasibility ◽  
Performance Ratio ◽  
Energy Output ◽  
Solar Pv ◽  
Economic Returns ◽  
Pv System

AbstractThis study investigates the techno-economic feasibility of installing a 3-kilowatt-peak (kWp) photovoltaic (PV) system in Kathmandu, Nepal. The study also analyses the importance of scaling up the share of solar energy to contribute to the country's overall energy generation mix. The technical viability of the designed PV system is assessed using PVsyst and Meteonorm simulation software. The performance indicators adopted in our study are the electric energy output, performance ratio, and the economic returns including the levelised cost and the net present value of energy production. The key parameters used in simulations are site-specific meteorological data, solar irradiance, PV capacity factor, and the price of electricity. The achieved PV system efficiency and the performance ratio are 17% and 84%, respectively. The demand–supply gap has been estimated assuming the load profile of a typical household in Kathmandu under the enhanced use of electric appliances. Our results show that the 3-kWp PV system can generate 100% of electricity consumed by a typical residential household in Kathmandu. The calculated levelised cost of energy for the PV system considered is 0.06 $/kWh, and the corresponding rate of investment is 87%. The payback period is estimated to be 8.6 years. The installation of the designed solar PV system could save 10.33 tons of CO2 emission over its lifetime. Overall, the PV systems with 3 kWp capacity appear to be a viable solution to secure a sufficient amount of electricity for most households in Kathmandu city.

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