scholarly journals Concept Designing of a Solar Photovoltaic UPS System with Sunlight Tracker

2021 ◽  
Vol 9 (VII) ◽  
pp. 1391-1394
Author(s):  
Dr. Gaurav Srivastava
Keyword(s):  
Peak Power ◽  
Open Circuit Voltage ◽  
Tracking System ◽  
Photovoltaic Cell ◽  
Electrical Equipment ◽  
Open Circuit ◽  
Solar Photovoltaic ◽  
Pv Panel ◽  
Secondary Load ◽  
Power Point

This paper defines the design of UPS system with the help of sun tracking system, as a source for chargingthe battery to provide the backup power when the regular power source fails. This authentication is provided by obtaining the theoretical calculation of output power, output current and output voltage which are developed due to solar radiations. In this system, if the primary load is not in use, then the power is automatically switching over to secondary load. Basically, an UPS is electrical equipment that is used at the time of emergency. The battery bank is charged with the help of solar photovoltaic cell. This paper proposed an approach to understand the peak power point of the sun based on analysis of the open-circuit voltage of the PV panel. This project provides the power supply to a load which is uninterruptible, by automatically selecting the supply from the main source or inverter.

scholarly journals Improved Fractional Open Circuit Voltage MPPT Methods for PV Systems

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 321 ◽  
Author(s):  
Dmitry Baimel ◽  
Saad Tapuchi ◽  
Yoash Levron ◽  
Juri Belikov
Keyword(s):  
Open Circuit Voltage ◽  
Open Circuit ◽  
Maximum Power ◽  
Pv System ◽  
Maximum Power Point ◽  
Pv Systems ◽  
Point Tracking ◽  
Pv Panel ◽  
Power Point Tracking ◽  
Power Point

This paper proposes two new Maximum Power Point Tracking (MPPT) methods which improve the conventional Fractional Open Circuit Voltage (FOCV) method. The main novelty is a switched semi-pilot cell that is used for measuring the open-circuit voltage. In the first method this voltage is measured on the semi-pilot cell located at the edge of PV panel. During the measurement the semi-pilot cell is disconnected from the panel by a pair of transistors, and bypassed by a diode. In the second Semi-Pilot Panel method the open circuit voltage is measured on a pilot panel in a large PV system. The proposed methods are validated using simulations and experiments. It is shown that both methods can accurately estimate the maximum power point voltage, and hence improve the system efficiency.

Application of nano-PCMs in solar Photovoltaic

2020 ◽  
pp. 47-58
Author(s):  
Shubham Srivastava ◽  
Deepak ◽  
CS Malvi
Keyword(s):  
Transfer Rate ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Storage Medium ◽  
Pv System ◽  
Cooling Systems ◽  
Pv Panel ◽  
Solar Pv System

Although the good intensity of solar radiation is desirable for a solar PV system, but the power output drops with a rise in its temperature. The open-circuit voltage of PV panel decreases with increase in its temperature, thus lowering the PV effect. Many studies have been carried out by the researcher to tackle this problem, proposing modification in conventional PV system design and utilizing water, air, PCM, and oil as a cooling medium in various cooling systems. Although PCM has fascinating characteristics as a thermal energy storage medium in the solar system, but low thermal conductivity became a barrier in energy conversion. Few studies suggested the use of nanoparticles in PCM to increase its heat transfer rate but very few studies were focused on nano PCM incorporated solar PV system. This paper summarized the researches done so far on nano PCM solar PV system by delineating the methods, and materials involved.

A Novel Computational Approach towards Maximum Power Point Tracking for Solar Photovoltaic and Wind Energy Systems

2014 ◽  
Vol 592-594 ◽  
pp. 2331-2335
Author(s):  
Singh Ajal Puneet ◽  
Dahiya Ratna
Keyword(s):  
Open Circuit Voltage ◽  
Energy Systems ◽  
Open Circuit ◽  
Maximum Power ◽  
Solar Photovoltaic ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point ◽  
Wind Energy Systems

In this paper a new approach for maximum power point tracking (MPPT) is proposed. The fractional open circuit voltage based MPPT states that the photovoltaic (PV) array voltage corresponding to the maximum power gives a linear dependence with respect to array open circuit voltage for different irradiation and temperature levels. This method is the easiest and simplest of all the MPPT methods but the disconnection of the PV array from the load on regular intervals for the sampling of the array voltage causes significant power loss. A new and simple approach is proposed by the simple linear equation of line for calculating the duty cycle of the boost converter which will extract the maximum power for the particular radiations. This topology can also be used for Wind energy systems but here the simulation is done with solar photovoltaic only. The proposed work is verified using MATLAB/SIMULNK and simulation results shows a clear improvement in achieving the desired results.

scholarly journals A Simple and Efficient MPPT Method for Low-Power PV Cells

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Maria Teresa Penella ◽  
Manel Gasulla
Keyword(s):  
Open Circuit Voltage ◽  
Cell Model ◽  
Experimental Tests ◽  
Low Complexity ◽  
Open Circuit ◽  
Maximum Power ◽  
Sensor Nodes ◽  
Pv Panel ◽  
Pv Cell ◽  
Power Point

Small-size PV cells have been used to power sensor nodes. These devices present limited computing resources and so low complexity methods have been used in order to extract the maximum power from the PV cells. Among them, the fractional open circuit voltage (FOCV) method has been widely proposed, where the maximum power point of the PV cell is estimated from a fraction of its open circuit voltage. Here, we show a generalization of the FOCV method that keeps its inherent simplicity and improves the tracking efficiency. First, a single-diode model for PV cells was used to compute the tracking efficiency versus irradiance. Computations were carried out for different values of the parameters involved in the PV cell model. The proposed approach clearly outperformed the FOCV method, specially at low irradiance, which is significant for powering sensor nodes. Experimental tests performed with a 500 mW PV panel agreed with these results.

scholarly journals Development of an Automated Biaxial Solar Photovoltaic Tracking System

2006 ◽  
Vol 3 (2) ◽  
pp. 1
Author(s):  
Ahmad Maliki Omar ◽  
Muhamad Rizuan Yahir ◽  
Sulaiman Shaari ◽  
Abdul Rahman Omar
Keyword(s):  
Power Output ◽  
Solar Irradiance ◽  
Open Circuit Voltage ◽  
Tracking System ◽  
Electrical Power ◽  
Open Circuit ◽  
Maximum Output ◽  
Solar Photovoltaic ◽  
Pv System ◽  
Solar Altitude

This paper presents and describes a prototype product code-named SolT2A which is a system that tracks the position of the sun automatically across the celestial vault in two axes. This kind of system is typically used in a solar photovoltaic (PV) system in terrestrial applications to provide electrical power. It is designed and fabricated due to Malaysia’s location near the equator, thus the solar altitude crosses the zenith and the azimuth reverses direction during the year. Thus the use of a static PV system is not maximised during half of the year. This situation can be addressed by using a two-axes solar tracking system. So far, Malaysia has not implemented such power-tracking systems. Thus SolT2A has been designed and fabricated to address the problem by using a combination of electro-mechanical devices with an element of programming ingenuity and intelligence. Basically SolT2A measures solar irradiance at four points and makes comparisons in terms of the intensity received. These data are then analysed and processed by a controller before being sent to a DC motor that ensures the maximum amount of solar irradiance received on the PV panels all the time. Thus SolT2A is a system that maximises the power output of the PV panels to obtain the highest power output continuously. Based on field data, the maximum output open circuit voltage produced by the SolT2A tracking system and that with a static PV system is as much as 82 %. The overall increase in open circuit voltage production is between 15 to 20 % daily. With the technical know-how and proven prototype, Malaysia can look into joining the small and limited but niche pool of expertise in this area. This will not only give immediate socio-economic impact to the population, but will give an upgrade to Malaysia as a country with expertise in the area. This concept could also be applied to defence systems. With further testing and improvement, SolT2A system can be further upgraded to reach a commercial stage. This will definitely be of commercial interest to the country.

scholarly journals New Design of Solar Photovoltaic and Thermal Hybrid System for Performance Improvement of Solar Photovoltaic

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Ridwone Hossain ◽  
Al Jumlat Ahmed ◽  
Sheik Md Kazi Nazrul Islam ◽  
Nirupam Saha ◽  
Preetom Debnath ◽  
...  
Keyword(s):  
Hybrid Systems ◽  
Energy Conversion Efficiency ◽  
Open Circuit ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Thermal Systems ◽  
Energy Technologies ◽  
Pv Panel ◽  
Average Improvement ◽  
New Type

Solar photovoltaic (PV) and solar thermal systems are most widely used renewable energy technologies. Theoretical study indicates that the energy conversion efficiency of solar photovoltaic gets reduced about 0.3% when its temperature increases by 1°C. In this regard, solar PV and thermal (PVT) hybrid systems could be a solution to draw extra heat from the solar PV panel to improve its performance by reducing its temperature. Here, we have designed a new type of heat exchanger for solar PV and thermal (PVT) hybrid systems and have studied the performance of the system. The PVT system has been investigated in comparison with an identical solar PV panel at outdoor condition at Dhaka, Bangladesh. The experiments show that the average improvement of open circuit voltage (Voc) is 0.97 V and the highest improvement of Voc is 1.3 V. In addition, the overall improvement of output power of solar PV panel is 2.5 W.

Glucose Oxidation by Nano-Fibrous Anodes in a Fuel Cell

2008 ◽  
Author(s):  
Pinchas Schechner ◽  
Eugenia Bubis ◽  
Hana Faiger ◽  
Eyal Zussman ◽  
Ehud Kroll
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Power Density ◽  
Peak Power ◽  
Open Circuit Voltage ◽  
Volume Ratio ◽  
Open Circuit ◽  
High Area ◽  
Micrometer Size ◽  
Oxidation Of Glucose

This work adds more experimental evidence regarding the feasibility of using glucose to fuel fuel-cells with anodes that have a high area-to-volume ratio. Electrospinning was used to fabricate sub-micrometer size fibrous electrocatalytic anode membranes for the oxidation of glucose in an alkaline fuel cell (AFC). The fibers of the membranes were made of polyacrylonitrile (PAN) and coated with silver by electroless plating. The anodes were tested while installed in a membranless fuel cell. The results presented include the open circuit voltage, OCV, the polarization curve, the power density as a function of the current density, and the peak power density, PPD. The measurements were performed with constant concentrations of glucose, 0.8 M, and KOH electrolyte solution, 1M. The performance of the anodes was found to improve as the diameter of the silver-plated fibers decreased. The highest PPD of 0.28 mW/cm2 was obtained with an anode made of plated fibers having a mean fiber diameter of 130 nanometers. We conclude from the results that saccharides in general, and glucose in particular, can serve as fuels for fuel cells, and that silver-plated polymeric electrospun electrodes have advantages due to their large surface area.

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