scholarly journals Modeling and Simulation of PV Panel Under Different Internal and Environmental Conditions with Non-constant Load

2019 ◽  
pp. 376-392 ◽  
Author(s):  
Masud R. Rashel ◽  
Rui Melicio ◽  
Mouhaydine Tlemcani ◽  
Teresa Goncalves
Keyword(s):  
Modeling And Simulation ◽  
Environmental Conditions ◽  
Constant Load ◽  
Pv Panel

scholarly journals Early Detection of Photovoltaic Panel Degradation through Artificial Neural Network

2021 ◽  
Vol 11 (19) ◽  
pp. 8943
Author(s):  
Rudy Alexis Guejia Burbano ◽  
Giovanni Petrone ◽  
Patrizio Manganiello
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Environmental Conditions ◽  
A Priori ◽  
The Other ◽  
Photovoltaic Panel ◽  
Pv Panel ◽  
Artificial Neural ◽  
The Difference ◽  
Artificial Neural Network Ann

In this paper, an artificial neural network (ANN) is used for isolating faults and degradation phenomena occurring in photovoltaic (PV) panels. In the literature, it is well known that the values of the single diode model (SDM) associated to the PV source are strictly related to degradation phenomena and their variation is an indicator of panel degradation. On the other hand, the values of parameters that allow to identify the degraded conditions are not known a priori because they can be different from panel to panel and are strongly dependent on environmental conditions, PV technology and the manufacturing process. For these reasons, to correctly detect the presence of degradation, the effect of environmental conditions and fabrication processes must be properly filtered out. The approach proposed in this paper exploits the intrinsic capability of ANN to map in its architecture two effects: (1) the non-linear relations existing among the SDM parameters and the environmental conditions, and (2) the effect of the degradation phenomena on the I-V curves and, consequently, on the SDM parameters. The ANN architecture is composed of two stages that are trained separately: one for predicting the SDM parameters under the hypothesis of healthy operation and the other one for degraded condition. The variation of each parameter, calculated as the difference of the output of the two ANN stages, will give a direct identification of the type of degradation that is occurring on the PV panel. The method was initially tested by using the experimental I-V curves provided by the NREL database, where the degradation was introduced artificially, later tested by using some degraded experimental I-V curves.

scholarly journals Performance Analysis of a Floating Photovoltaic System and Estimation of the Evaporation Losses Reduction

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8336
Author(s):  
Arnas Majumder ◽  
Roberto Innamorati ◽  
Andrea Frattolillo ◽  
Amit Kumar ◽  
Gianluca Gatto
Keyword(s):  
Environmental Conditions ◽  
Water Surface ◽  
Photovoltaic System ◽  
Water Evaporation ◽  
True Temperature ◽  
Efficiency Gain ◽  
Water Cooling ◽  
Positive Effects ◽  
Pv Panel ◽  
Water Surface Area

Our research aims to achieve dual-positive effects in the presented study by raising photovoltaic (PV) panels over the water surface. With this, target experiments were primarily conducted to evaluate the efficiency increments of the PV panel while reducing its operating temperature through passive convective cooling obtained by raising it over water. The following objective was to estimate the reduction in water evaporation due to the shading effect induced by the panel placed inside the same basin. The performance of two PV panels was analyzed, one used for tests, the other as a reference. The characteristic curves were determined under the local environmental conditions of Cagliari, Italy. The true temperature reduction and efficiency gain calculations of panel P1 due to water cooling was achieved via the measured temperatures and calculated efficiencies of panel P2 at environmental conditions. The water height inside the basin was constantly monitored and maintained at approximately 7.5 cm below panel P1, which covered about 17% of the total water surface area. The presence of water underneath P1 leads to its efficiency increment on average by 2.7% (absolute) and about 17.22% (relative). At the same time, temperature of panel P1 dropped by 2.7 °C on average. The comparative water evaporation study conducted with and without P1 inside the basin showed a 30% reduction in water evaporation.

scholarly journals Modeling and Simulation of MEMS based Pressure Sensor for Industrial Applications

2019 ◽  
Vol 9 (1) ◽  
pp. 1739-1743
Keyword(s):  
Modeling And Simulation ◽  
Pressure Sensor ◽  
Environmental Conditions ◽  
High Sensitivity ◽  
Industrial Applications ◽  
Comsol Multiphysics ◽  
Circular Membrane ◽  
Dimensional Changes ◽  
Simulation Results ◽  
Input Load

This paper presents an overview of design, modeling and simulation of MEMS pressure sensor is using COMSOL Multiphysics V4.3b. An attempt has been made to achieve high sensitivity by providing different structures for membrane (Circular, square, rectangle & triangle) with uniform surface area and thickness. Further, simulations have been carried out with various loads ranging from 0.1 to 1MPa assigning three materials viz., InP, GaAs and Silicon. From the analyses of simulation results, it has been observed that the pressure sensor with circular membrane provided InP material found to exhibit more deformation and high sensitivity of 17.3×10-12 for 10 µm thickness and 50.8×10-12 for 7 µm thickness. The reasons for enhancement in the sensitivity are discussed in detail as function of input load, dimensional changes of diaphragm and materials addition. These studies are highly useful to check and compute pressure in various industrial and environmental conditions.

Computer Simulation for Thermal Analysis of an Electric Box

2014 ◽  
Vol 971-973 ◽  
pp. 1092-1094
Author(s):  
Bo Chen ◽  
Ning Li
Keyword(s):  
Thermal Analysis ◽  
Computer Simulation ◽  
Finite Element ◽  
Finite Element Model ◽  
Contact Resistance ◽  
Modeling And Simulation ◽  
Environmental Conditions ◽  
Thermal Contact Resistance ◽  
Thermal Contact ◽  
Element Model

Computer modeling and simulation of thermal analysis of a satellite borne electric box is introduced in this paper. Simplified geometry was built and meshed to get a finite element model. Then the environmental conditions were defined, the work case was analyzed, and the influence of the parameter of a thermal contact resistance was discussed.

Modeling and Simulation of Buck Converter for Charging Battery by Solar Photovoltaic System

2014 ◽  
Vol 592-594 ◽  
pp. 2379-2385 ◽  
Author(s):  
Lakshmanan Maheswari ◽  
R. Sornavadivu ◽  
S. Vijayalakshmi
Keyword(s):  
Modeling And Simulation ◽  
Pid Controller ◽  
Energy Demand ◽  
Fossil Fuels ◽  
Clean Energy ◽  
Buck Converter ◽  
Photovoltaic System ◽  
Pv System ◽  
Point Tracking ◽  
Pv Panel

Fossil fuels reserves are decreasing in a rapid pace due to more power consumption. Advancement of technology, usage of electrical equipments and increase in population are the main reasons for energy consumption. In order to meet the energy demand and to sustain the environment depending on non-conventional sources of energy is inevitable. Solar energy is the clean energy source which is naturally available in abundant and does not contribute to green house gases. The energy from the sun is directly converted into the electricity by using photovoltaic (PV) cells without using any intermediate steps. Solar charge controller is connected to the PV system for regulating the voltage and current coming from PV panel and to prevent overcharging of battery thereby increasing the life of battery. PID controller is used to obtain the desired voltage and for constant recharging of lead-acid battery. This paper addresses the modeling and simulation of Photovoltaic system under Maximum power Point Tracking (MPPT) condition and design of Buck converter with PID controller for constant charging of battery.

scholarly journals Enhancing the Performance of PV Panel Undergoing Shading Effects

2018 ◽  
Vol 9 (4) ◽  
pp. 1937
Author(s):  
Monadhel Al-Chaderchi ◽  
K. Sopian ◽  
T. Salameh ◽  
D. Zhang ◽  
M. A. Alghoul
Keyword(s):  
United Arab Emirates ◽  
Environmental Conditions ◽  
Energy Production ◽  
Electrical Characteristics ◽  
Solar Pv ◽  
Climate Conditions ◽  
Pv Panel ◽  
Cost Of Energy ◽  
Shading Effects ◽  
The Cost

<p>Experimental and simulation work were performed to study the effects of shading for different strings inside photovoltaic (PV) panels under real outdoor environmental climate conditions for Sharjah, United Arab Emirates. The electrical characteristics of PV panel were measured by using the PV analyzer, while the simulations were performed by MATLAB. The effect of full cell shading were studied experimentally for each configuration of two or four bypass diodes and verified by theoretical modeling. The I-V and P-V curves for all cases were recorded to investigate the effect of bypass diodes in reducing shading losses under similar environmental conditions. Compared to design with fewer bypass diodes, inserting more bypass diodes (four diodes in our work) contributed to higher yield in performance of solar PV panels undergoing shading while taking in to account the cost of energy production. Compared to the case of two bypass diodes, applying four diodes can recover up to ~31% of non-shaded maximum power under different cell shading conditions. </p>

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