Estimation of Most Frequent Conditions and Performance Evaluation of Three Photovoltaic Technology Modules

2016 ◽  
Vol 138 (5) ◽  
Author(s):  
Birinchi Bora ◽  
O. S. Sastry ◽  
Arun Kumar ◽  
Renu ◽  
Manander Bangar ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Standard Test ◽  
Performance Ratio ◽  
Energy Yield ◽  
Cell Temperature ◽  
Site Specific ◽  
Accurate Design ◽  
Data Points ◽  
And Performance ◽  
Operating Cell

In this paper, a performance evaluation technique using most frequent conditions (MFC) for accurate design of photovoltaic systems, based on energy rating and site-specific standards is reported. Most frequent conditions are estimated for the three different technologies: multicrystalline silicon (mc-Si), amorphous silicon (a-Si), and hetero-junction with intrinsic thin layer (HIT) for the site based on air-mass, module temperatures, incident in-plane irradiance, and power output. The performances are analyzed over a period of 3 years by evaluating changes in the performance ratio, the energy yields, and the percentages of occurrence of data points corresponding to standard test condition (STC), nominal operating cell temperature (NOCT), and MFC. For MFC, performance ratio (PR) values are ranging from 0.70 to 0.83, 0.70 to 0.86, and 0.70 to 0.90 for mc-Si, a-Si, and HIT, respectively. The total energy yield of HIT is the highest followed by a-Si and mc-Si modules for this climatic zone.

scholarly journals A study on the reliability and performance of solar powered street lighting systems

2017 ◽  
Vol 5 (2) ◽  
pp. 110 ◽  
Author(s):  
Adebayo Fashina ◽  
Salifu Azeko ◽  
Joseph Asare ◽  
Chukwuemeka Ani ◽  
Vitalis Anye ◽  
...  
Keyword(s):  
Performance Indicators ◽  
Performance Ratio ◽  
Energy Yield ◽  
Street Lighting ◽  
Technical Performance ◽  
Humid Environment ◽  
Total Failure ◽  
Lighting Systems ◽  
And Performance ◽  
Solar Powered

This paper presents the results of a study on the reliability and performance of the solar-powered street lighting systems installed at the African University of Science and Technology (AUST) in Nigeria, a hot and humid environment. The technical performance of the systems was studied using the following performance indicators: system energy yield, capture loss, as well as the system performance ratio while the reliability of the systems was examined using a model developed from the findings from the maintenance and fault diagnosis of the systems. The model was used to predict the total failure and survival probability of the systems using the Weibull distribution. The performance evaluation during the monitored period (February 2012 to January 2015) indicated that the performance ratios of the systems vary from 70% to 89% and the energy yields of the systems ranging from 2.87 h/day to 5.57 h/day. The results from the reliability analysis also showed that when the stress concentration factor around the notch between the cable terminals in the charge controller increases, the charge controller will become overheated, which in turn affected other components of the systems. The implications of this study are also discussed for the design and development of future solar-powered street lighting systems.

PV Model with Energy Balance Equation for Commercial PV Modules

2013 ◽  
Vol 284-287 ◽  
pp. 1163-1167 ◽  
Author(s):  
Huan Liang Tsai ◽  
Chao Jia Yang
Keyword(s):  
Energy Balance ◽  
Balance Equation ◽  
Energy Balance Equation ◽  
Standard Test ◽  
Electrical Characteristics ◽  
Cell Temperature ◽  
Pv Module ◽  
Proposed Model ◽  
Output Characteristics ◽  
Operating Cell

This paper presents a novel photovoltaic (PV) model for a commercial PV module, which is augmented with an energy balance equation to simultaneously describe cell temperature and PV electricity output characteristics. Having the thermal and electrical characteristics of commercial PV module available from the manufacturer datasheet, the proposed PV model is implemented on the Simulink environment and verified under the standard test condition (STC) and nominal operating cell temperature (NOCT) condition. The NOCT verification with a commercial PV module datasheet is first addressed. Through experimental measurement of a commercial PV module in real operation from June 1 to August 31, 2011, the proposed model demonstrates the good estimation performance of both cell temperatures and output electricity characteristics. Comparing with ones of the other methods, the predicted output characteristics of the proposed model have a better agreement with the measured ones of an operating PV module.

Comparative Analysis of Crystalline and Double-Junction Amorphous Silicon Modules Performance in Outdoor Conditions

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Cristina Cornaro ◽  
Davide Musella
Keyword(s):  
Amorphous Silicon ◽  
Weather Conditions ◽  
Outdoor Exposure ◽  
Complete Characterization ◽  
Performance Comparison ◽  
Performance Ratio ◽  
Energy Yield ◽  
Pv Modules ◽  
Double Junction ◽  
And Performance

The paper deals with an extensive photovoltaic (PV) modules monitoring activity carried out at the outdoor station ESTER (Solar Energy TEst and Research) of the University of Rome Tor Vergata, Italy. The purpose of the work was to evaluate and compare the performance of PV silicon modules of polycrystalline (poli-Si) and amorphous (a-Si) technologies during a medium-term outdoor exposure at optimized tilt angle, facing south. Two PV modules, one polycrystalline silicon and one double-junction amorphous silicon, have been exposed since May 2009 until Oct. 2010. A complete characterization of the weather conditions at the site during the test has been performed, and the most relevant parameters for the performance comparison of the two technologies have been derived. In order to compare different technologies and power productions, the energy yield (Y) and performance ratio (PR) for the two modules have been evaluated on a monthly and yearly basis. The typical seasonal trend of PR has been observed for the polycrystalline module, essentially due to the temperature influence on the module performance. For the a-Si module, instead, a degradation trend has been observed for the first months of operation. Subsequently, a significant recovery in the PR and energy production has been registered.

scholarly journals Efficacy Evaluation of Skin Care ProductsUsing PhabrOmeter

2019 ◽  
Author(s):  
Ning Pan ◽  
Melissa Lum ◽  
Brian Tran
Keyword(s):  
Performance Evaluation ◽  
American Association ◽  
Standard Test ◽  
Skin Care ◽  
Test Method ◽  
Efficacy Evaluation ◽  
Standard Testing ◽  
Performance Specifications ◽  
And Performance ◽  
Skin Samples

Current instrumental technology in evaluating performance of skin care creams is still rather limited and there are no industrial standard testing equipment, method and performance specifications for it.  In this paper, we report our attempt in using an instrument called PhabrOmeter for this purpose. PhabrOmeter is a commercialized instrument for sensory performance evaluation of textiles, leather, paper and nonwoven and has been designated by American Association of Textile Chemists and Colorists (AATCC) as a standard test method for textiles, AATCC TM 202 in 2013.    By adopting artificial skin samples treated with skin care creams, we have developed a procedure to apply this instrument for evaluation of skin care creams from sample preparation, measurement to data analysis and interpretation. The results using commercial skin care creams to demonstrate the feasibility and advantages of this instrument are provided.

scholarly journals Performance evaluation of roof top solar photovoltaic systems in Tamilnadu

2019 ◽  
Vol 8 (3) ◽  
pp. 265
Author(s):  
M. Aravindan ◽  
V. Balaji ◽  
V. Saravanan ◽  
M. Arumugam
Keyword(s):  
Power Plants ◽  
Performance Ratio ◽  
Electricity Production ◽  
Energy Yield ◽  
Solar Photovoltaic ◽  
Pv System ◽  
System Output ◽  
And Performance ◽  
Bad Weather ◽  
Performance Results

This manuscript reports the monitored performance results of roof top solar photovoltaic (PV) power plants in different parts of Tamilnadu, India. In this work, PV plants of capacities 84 kWp and 18 kWp located at Tirunelveli and Ranipet respectively in Tamilnadu are considered. During an eight month period, of September 2014 to April 2015, these plants had generated 43.99 MWh and 15.55 MWh units of electricity respectively. The average electricity production per day for the considered period of these plants is 181.74 kWh and 62.81 kWh respectively. The performance ratio (PR) of these plants PV1 and PV2 is found to be 0.52 and 0.86 respectively. The characteristics of poly crystalline PV modules and the performance of employed photovoltaic inverters are also analyzed.It is observed that external conditions like climate and bad weather significantly reduces the PV system output, whereas it reduces marginally due to inverter failure as observed from the values of energy yield and performance ratio of these plants. Online monitoring of PV plant with DC/AC line and phase voltages and current waveforms observed for the given day are also presented.

Analysis of the Spatiotemporal Characteristics of High Concentrator Photovoltaics Energy Yield and Performance Ratio

2017 ◽  
Vol 7 (1) ◽  
pp. 359-366 ◽  
Author(s):  
Jose A. Ruiz-Arias ◽  
Eduardo F. Fernandez ◽  
Alvaro Linares-Rodriguez ◽  
Florencia Almonacid
Keyword(s):  
Performance Ratio ◽  
Energy Yield ◽  
Spatiotemporal Characteristics ◽  
And Performance

scholarly journals Stationary Energy Storage System for Fast EV Charging Stations: Optimality Analysis and Results Validation

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 230 ◽  
Author(s):  
Akhtar Hussain ◽  
Van-Hai Bui ◽  
Ju-Won Baek ◽  
Hak-Man Kim
Keyword(s):  
Performance Evaluation ◽  
Energy Storage ◽  
Storage System ◽  
Energy Storage System ◽  
Performance Ratio ◽  
Cost Index ◽  
Stationary Energy ◽  
And Performance ◽  
Charging Stations ◽  
Ev Charging

In order to minimize the peak load of electric vehicles (EVs) and enhance the resilience of fast EV charging stations, several sizing methods for deployment of the stationary energy storage system (ESS) have been proposed. However, methods for assessing the optimality of the obtained results and performance of the determined sizes under different conditions are missing. In order to address these issues, a two-step approach is proposed in this study, which comprises of optimality analysis and performance evaluation steps. In the case of optimality analysis, random sizes of battery and converter (scenarios) are generated using Monte Carlo simulations and their results are compared with the results of sizes obtained from sizing methods. In order to carry out this analysis, two performance analysis indices are proposed in this study, which are named the cost index and the power index. These indices respectively determine the performance of the determined sizes in terms of total network cost and performance ratio of power bought during peak intervals and investment cost of the ESS. During performance evaluation, the performance of the determined sizes (battery and converter) are analyzed for different seasons of the year and typical public holidays. Typical working days and holidays have been analyzed for each season of the year and suitability of the determined sizes is analyzed. Simulation results have proved that the proposed method is suitable for determining the optimality of results obtained by different sizing methods.

scholarly journals The impact of high temperature and irradiance source on the efficiency of polycrystalline photovoltaic panel in a controlled environment

2020 ◽  
Vol 10 (4) ◽  
pp. 3942
Author(s):  
Julie C. Ogbulezie ◽  
Armstrong O. Njok ◽  
Manoj Kumar Panjwani ◽  
Suresh K. Panjwani
Keyword(s):  
Performance Ratio ◽  
Photovoltaic Module ◽  
The Sun ◽  
Solar Panels ◽  
Cell Temperature ◽  
Photovoltaic Panel ◽  
Irradiance Level ◽  
Increasing Temperature ◽  
The Impact ◽  
Operating Cell

Solar cells are highly sensitive to temperature, which affects its operating parameters. The study has its aim in accessing the impact of temperature (in excess above the maximum operating cell temperature) and irradiance source on the efficiency of polycrystalline photovoltaic (PV) solar panels in an environment where the temperature and irradiance level can be fully controlled. For the study to achieve its aim, a solar box and tungsten light bulbs were used to create an environment where the irradiance level and the temperature can be controlled. The solar panel was placed inside the solar box facing the light source while the irradiance level and temperature were measured and held constant. Results show a steady decrease in voltage with increasing temperature while the performance ratio and efficiency of the photovoltaic module followed a similar trend as that of voltage once the temperature exceeds the maximum operating cell temperature. Results also show the output voltage of the photovoltaic to be higher under the tungsten light than the sun, but the efficiency achieved by the photovoltaic under the sun far exceeds that obtained under the tungsten light.

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