Develop of a system for the mensuration of the energy efficiency of solar cells (original) (raw)
Related papers
EFFICIENCY MEASUREMENT OF A PHOTOVOLTAIC SYSTEM
Nigeria due to the continued depletion of fossil fuel reserves and the environmental pollution associated with its use. As a result, the use of solar photovoltaic technology is no longer uncommon. Photovoltaic systems of various technologies are found to be imported from different countries and are being used locally with little or no information of their appraisal and field performance. This research determines the in situ practical efficiency of a photovoltaic system. The illuminance of the sun on the solar panels, output current and voltage of the panels are measured at regular time intervals of the day over a month period. The ultimate goal of the research is to develop standards by which the quality of photovoltaic systems can be measured.
Solar Energy Laboratory: Summary of Ten Years Continuous Experiences
Renewable Energy and Power Quality Journal, 2012
As a result of nearly 30 years of research activities in the field, and a need for experimental work, in 2002 at the Faculty of Electrical Engineering and IT at "Sts Cyril and Methodius" University in Skopje, a Solar Energy Laboratory had been established. It mainly deals with stand-alone (incl. hybrid) photovoltaic systems, but the results of many experiments can be found useful in grid-connected system applications. In the paper several research and educational possibilities of the installed equipment are presented. For that purpose, the results of some experiments and equipment testing have been shown. Ideas for further improvements are also presented. There are elaborated continuous (since 2002) onsite measurement values of the solar radiation and the ambient temperature. There is also presented a method for measuring the I-V characteristic of a photovoltaic generator, together with the approach for obtaining the values of its working parameters.
Automation, Control and Intelligent Systems, 2019
At present, much attention is paid to the use of solar energy. Solar energy, in addition to traditional energy, is ecologically clean while changing. The rarity and the rising cost of fuel is one of the main problems of the scientific technique, which is the acquisition of infinite resources of solar energy. Further research and experiments on the use of solar energy, as well as the use of solar power plants in a number of countries, shows that solar energy can be widely used today based on modern technical capacities. In order to determine the need to use a charger, it is necessary to know a number of parameters: short circuit current, no-load voltage, efficiency, etc. In this work, these parameters are estimated from the results of studies of the current-voltage characteristic of a solar panel obtained in automatic mode using a computer and digital measuring device "EPH 2 Advanced photovoltaics trainer".
Monitoring of the Solar Photovoltaic Energy
This paper presents the adopted solutions of registration the basic solar energy parameters for the Resita, 'Eftimie Murgu' University location, respectively around the parallel 45 0 north latitudinal. This information is necessary to realize photovoltaic installation in Romania. The monitoring system ensures a real time (on-line) registration of the incident solar radiation, the module temperature, ambient temperature as well as electrical parameters: voltage, current, obtained power for a longer period (couple of years). This information allows then a correct estimation of the energy that can be obtained with this kind of installation.
Photovoltaic effect or phenomenon is the creation of a voltage and corresponding current in a material upon exposure to light energy following the principle that for every excitation there must be a response. The exposition of a solar cell to incident optical radiation excites the dislodgement of electrons hence the creation of holes and subsequent migration of opposite charges. The amount of voltage that can be generated is a function of the intensity of incident optical radiation and the position of the solar cell to such radiation. Measurements of illumination intensity from halogen and tungsten lamps by a digital lux meter and open circuit voltage, short circuit current as output parameters by volt-amp meter LCD display embedded in the solar power device was carried out. The evaluation of fill factor, maximum power and conversion efficiency as other output parameters in relation to illumination from the sources of light at varying angle and distance were carried out in this study also. The variation of the internal resistance of the cell with light intensity was also investigated. The maximum output voltage and current were realized at angle zero degree when the light ray falls at normal to the cell surface. The two 10Watts halogen lamp gave the highest illumination intensity of 116lx while the 40Watt and 60Watt tungsten lamp placed at 10cm from the solar cell indicated an intensity of 70lx and 25lx each. The results showed the strongly direct dependency of these parameters on illumination intensity and their inverse dependence on the tilt angle and distance of the illumination source. The internal resistance decreases with increasing intensity while the evaluated fill factor, maximum power and efficiency remain fairly constant but at an average value 0.53, 122mW and 55% respectively.
The rating of photovoltaic performance
IEEE Transactions on Electron Devices, 1999
The electrical performance of photovoltaic (PV) cells, modules, and systems are rated in terms of their maximum electrical power with respect to a total irradiance, temperature, and spectral irradiance. The impact of the reference conditions, measurement procedures, and equipment on the performance rating is discussed.
Contemporary Materials, 2013
This paper presents basic information on a 2 kW solar power plant at the Faculty of Sciences and Mathematics in Niš and the equipment for its energy efficiency determination depending on the real meteorological conditions (inverter, communication system, sensor, etc.). Additionally, the results are shown of experimental determination of energy efficiency of the solar power plant at (energy of the Sun radiation, ambient temperature, wind velocity, generated electrical energy, etc.).
Laboratory exercises of photovoltaic systems–Review of the equpment, methodology, trials and results
Renewable and Sustainable Energy Reviews, 2017
The laboratory for renewable energy sources of the Higher Education Technical School of Professional Studies in Novi Sad (Serbia) contains the equipment regarding solar and thermal techniques, based on the implementation of solar panels, heat pumps and a pellet stove. Photovoltaic systems include the implementation of static photovoltaic panels, trackers and inverters for power supply of autonomous consumers. In addition, the laboratory is equipped with modern systems of internal and external lighting, a wind generator with accompanying inverter, elements of smart installations and fuel cell systems for laboratory measurements. This paper presents experiences in the implementation of the photovoltaic systems in the educational process through laboratory exercises. The specification of the laboratory equipment, the methodology of work, as well as the electrical schemes of experiments of open circuits and short circuit, recording of electricity-voltage characteristics, tracking the maximum power point, serial and parallel connection and shading of photovoltaic cell are presented. The second group of the trial is performed on the "off grid" photovoltaic system set in the schoolyard and connected to the appropriate inverter with the autonomous group of consumers. The paper presents the results of laboratory measurements, issues for discussion, evaluation of the performance and conclusions.
A laboratory system development for measuring characteristics of photovoltaic-thermal panel
IMK-14 - Istrazivanje i razvoj
Smanjenje emisije štetnih gasova u atmosferu i time zagađivanje životne sredine se u velikoj meri može podstaknuti povećanjem upotrebe obnovljivih izvora energije kao što je solarna energija, kako u cilju zagrevanja tople vode i grejanja prostora, tako i u generisanju električne energije. U ovom radu je data analiza hibridnog (kombinovanog)sistema sa PV/T panelom koji omogućuje istovremeno generisanje toplotne i električne energije, kao i komponenata prototipa laboratorijskog sistema za merenje toplotnih i električnih parametara ovih sistema. U radu su prikazani rezultati ispitivanja realizovanih merenja temperature, protoka, dobijene električne i toplotne snage u realnim vremenskim uslovima. Na osnovu analize komponenata sistema i rezultata ispitivanja predložene su izmene laboratorijskog sistema i opreme sa ciljem dobijanja preciznijih rezultata merenja.
STUDY AND PERFORMANCE OF PHOTOVOLTAIC CELLS WITH VARIOUS TYPE OF PARAMETER
Photovoltaic cells are converts about 15% of the solar energy falling into the useful electricity. The increase in the temperature increases the resistance of these cell and in turns decreases the cell efficiency. So, cooling these panels is the effective way of increasing the cell efficiency. The performance of the solar panel increases by reducing the temperature. This cooling is done by air cooling or water cooling on the self-designed modified panel. The solar panels are cooled by passing air with the help of blower.