The document discusses photovoltaic or solar cells. It defines solar cells as semiconductor devices that convert light into electrical energy. The construction of a basic silicon solar cell is described, involving a p-type and n-type semiconductor material forming a PN junction. When light photons are absorbed by the semiconductor, electrons are energized and emitted, generating an electric current. Multiple solar cells can be connected in series, parallel or series-parallel combinations to increase output voltage and current. Applications of solar cells include solar power generation, heating, lighting, and powering small electronics. Advantages are environmental sustainability and low maintenance costs, while disadvantages include low efficiency and intermittency of solar energy.
Q: What is photovoltaics (solar electricity) or "PV"?
A: What do we mean by photovoltaics? The word itself helps to explain how photovoltaic (PV) or solar
electric technologies work. First used in about 1890, the word has two parts: photo, a stem derived from
the Greek phos, which means light, and volt, a measurement unit named for Alessandro Volta
(1745-1827), a pioneer in the study of electricity. So, photovoltaics could literally be translated as
light-electricity. And that's just what photovoltaic materials and devices do; they convert light energy to
electricity, as Edmond Becquerel and others discovered in the 18th Century.
Q: How can we get electricity from the sun?
A: When certain semiconducting materials, such as certain kinds of silicon, are exposed to sunlight, they
release small amounts of electricity. This process is known as the photoelectric effect. The photoelectric
effect refers to the emission, or ejection, of electrons from the surface of a metal in response to light. It
is the basic physical process in which a solar electric or photovoltaic (PV) cell converts sunlight to
electricity.
Sunlight is made up of photons, or particles of solar energy. Photons contain various amounts of energy,
corresponding to the different wavelengths of the solar spectrum. When photons strike a PV cell, they
may be reflected or absorbed, or they may pass right through. Only the absorbed photons generate
electricity. When this happens, the energy of the photon is transferred to an electron in an atom of the
PV cell (which is actually a semiconductor).
With its newfound energy, the electron escapes from its normal position in an atom of the
semiconductor material and becomes part of the current in an electrical circuit. By leaving its position,
the electron causes a hole to form. Special electrical properties of the PV cell—a built-in electric
field—provide the voltage needed to drive the current through an external load (such as a light bulb).
Q: What are the components of a photovoltaic (PV) system?
A: A PV system is made up of different components. These include PV modules (groups of PV cells),
which are commonly called PV panels; one or more batteries; a charge regulator or controller for a
stand-alone system; an inverter for a utility-grid-connected system and when alternating current (ac)
rather than direct current (dc) is required; wiring; and mounting hardware or a framework.
Q: How long do photovoltaic (PV) systems last?
A: A PV system that is designed, installed, and maintained well will operate for more than 20 years. The
basic PV module (interconnected, enclosed panel of PV cells) has no moving parts and can last more than
30 years. The best way to ensure and extend the life and effectiveness of your PV system is by having it
installed and maintained properly. Experience has shown that most problems occur because of poor or
sloppy system installation.
Q: What is photovoltaics (solar electricity) or "PV"?
A: What do we mean by photovoltaics? The word itself helps to explain how photovoltaic (PV) or solar
electric technologies work. First used in about 1890, the word has two parts: photo, a stem derived from
the Greek phos, which means light, and volt, a measurement unit named for Alessandro Volta
(1745-1827), a pioneer in the study of electricity. So, photovoltaics could literally be translated as
light-electricity. And that's just what photovoltaic materials and devices do; they convert light energy to
electricity, as Edmond Becquerel and others discovered in the 18th Century.
Q: How can we get electricity from the sun?
A: When certain semiconducting materials, such as certain kinds of silicon, are exposed to sunlight, they
release small amounts of electricity. This process is known as the photoelectric effect. The photoelectric
effect refers to the emission, or ejection, of electrons from the surface of a metal in response to light. It
is the basic physical process in which a solar electric or photovoltaic (PV) cell converts sunlight to
electricity.
Sunlight is made up of photons, or particles of solar energy. Photons contain various amounts of energy,
corresponding to the different wavelengths of the solar spectrum. When photons strike a PV cell, they
may be reflected or absorbed, or they may pass right through. Only the absorbed photons generate
electricity. When this happens, the energy of the photon is transferred to an electron in an atom of the
PV cell (which is actually a semiconductor).
With its newfound energy, the electron escapes from its normal position in an atom of the
semiconductor material and becomes part of the current in an electrical circuit. By leaving its position,
the electron causes a hole to form. Special electrical properties of the PV cell—a built-in electric
field—provide the voltage needed to drive the current through an external load (such as a light bulb).
Q: What are the components of a photovoltaic (PV) system?
A: A PV system is made up of different components. These include PV modules (groups of PV cells),
which are commonly called PV panels; one or more batteries; a charge regulator or controller for a
stand-alone system; an inverter for a utility-grid-connected system and when alternating current (ac)
rather than direct current (dc) is required; wiring; and mounting hardware or a framework.
Q: How long do photovoltaic (PV) systems last?
A: A PV system that is designed, installed, and maintained well will operate for more than 20 years. The
basic PV module (interconnected, enclosed panel of PV cells) has no moving parts and can last more than
30 years. The best way to ensure and extend the life and effectiveness of your PV system is by having it
installed and maintained properly. Experience has shown that most problems occur because of poor or
sloppy system installation.
solar water heating system - types and mechanismlee shin
solar is one of the trending technology getting into use which reduces the utility bills and bring more beneficial factor through its eco friendly method
Photovoltaic Power Conversion systems
Solar constant:
Pyranometer:
Solar Photovoltaic(SPV) systems
Construction of Solar Cell
I-V curve and PV curve of solar cell
Efficiency of Solar Panel
Effect of Dust On Performance Of Solar PV Panel
Effect of temperature on solar power panel efficiency
Solar Photovoltaic(SPV) systems
solar water heating system - types and mechanismlee shin
solar is one of the trending technology getting into use which reduces the utility bills and bring more beneficial factor through its eco friendly method
Photovoltaic Power Conversion systems
Solar constant:
Pyranometer:
Solar Photovoltaic(SPV) systems
Construction of Solar Cell
I-V curve and PV curve of solar cell
Efficiency of Solar Panel
Effect of Dust On Performance Of Solar PV Panel
Effect of temperature on solar power panel efficiency
Solar Photovoltaic(SPV) systems
In presentation photovoltaic effect, solar cell material, types of solar cell, working principle, solar pv module, PV systems, Sizing of solar PV system etc are included.
Session 02 - Part 3 Solar Energy (PV Array Efficiency and Output).pptxLoveroopSingh1
microgrid solar,A microgrid is a local electrical grid with defined electrical boundaries, acting as a single and controllable entity. It is able to operate in grid-connected and in island mode. A 'Stand-alone microgrid' or 'isolated microgrid' only operates off-the-grid and cannot be connected to a wider electric power system
All about the solar cell for the purpose of usage of solar cells and solar battery bank.if we want to take knowledge for a solar then we should need to know about the conversation of solar energy into electrical energy .
This is not an efficient conversation of energy because the conversation of solar energy in to electrical energy gives the output only 18% output
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A photodiode is a semiconductor device that converts light into an electrical current. The current is generated when photons are absorbed in the photodiode. Photodiodes may contain optical filters, built-in lenses, and may have large or small surface areas.
These slides present the maximum power point tracking (MPPT ) algorithms for solar (PV) systems. Later of the class we will discuss on MPPT control of wind generators.
A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light. Individual solar cell devices are often the electrical building blocks of photovoltaic modules, known colloquially as solar panels. The common single junction silicon solar cell can produce a maximum open-circuit voltage of approximately 0.5 to 0.6 volts. Solar cells are described as being photovoltaic, irrespective of whether the source is sunlight or an artificial light. In addition to producing energy, they can be used as a photodetector (for example infrared detectors), detecting light or other electromagnetic radiation near the visible range, or measuring light intensity. The operation of a photovoltaic (PV) cell requires three basic attributes: The absorption of light, generating either electron-hole pairs or excitons.The separation of charge carriers of opposite types.The separate extraction of those carriers to an external circuit. In contrast, a solar thermal collector supplies heat by absorbing sunlight, for the purpose of either direct heating or indirect electrical power generation from heat. A "photoelectrolytic cell" (photoelectrochemical cell), on the other hand, refers either to a type of photovoltaic cell (like that developed by Edmond Becquerel and modern dye-sensitized solar cells), or to a device that splits water directly into hydrogen and oxygen using only solar illumination.
Trackers direct solar panels or modules towards sun. These devices change their orientation throughout the day to follow the sun's path to maximize energy capture.In photovoltaic systems, trackers help minimize the angle of incidence (the angle that a ray of light makes with a line perpendicular to the surface) between the incoming light and the panel, which increases the amount of energy the installation produces. Concentrated solar photovoltaics and concentrated solar thermal have optics that directly accepts sunlight, so solar trackers must be angled correctly to collect energy
How to Make a Field invisible in Odoo 17Celine George
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Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
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Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
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The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
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• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
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June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
Photovoltaic cell
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Photovoltaic or Solar Cell
Contents:
•Definition
•Construction of Photovoltaic Cell
•Working of Photovoltaic Cell
•Combination of PV Cells
Series Combination
Parallel Combination
Series-Parallel Combination
•Advantages
•Disadvantages
•Applications
Dr. M V Raghavendra,
Dept of Electronics & Communication
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Definition:
•The Photovoltaic cell is the semiconductor device that converts the light into
electrical energy.
•The voltage induced by the PV cell depends on the intensity of light incident
on it.
•The name Photovoltaic is because of their voltage producing capability from
light (Photons).
•The electrons of the semiconductor material are joined together by the
covalent bond.
•The Light energy is made of small energy particles called photons.
• When the photons incident on the semiconductor material, then the
electrons are energized and starts emitting.
•The energized electron are known as the Photoelectrons.
•And the phenomenon of emission of electrons is known as the
photoelectric effect.
•The working of the Photovoltaic cell depends on the photoelectric effect.
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•The semiconductor materials like arsenide, indium, cadmium, silicon, selenium
and gallium are used for making the PV cells.
•Mostly silicon and selenium are used for making the cell.
•Consider the figure below shows the constructions of the silicon photovoltaic
cell.
•The upper surface of the cell is made of the thin layer of the n-type material so
that the light can easily enter into the material.
•Two metal contacts at p-type and n-type material which acts as their positive
and negative output terminals respectively.
•The multi-crystalline or mono-crystalline semiconductor material make the
single unit of the PV cell.
•The output voltage and current obtained from the single unit of the cell is very
less.
•The magnitude of the output voltage is 0.6v for a single cell.
Construction of Photovoltaic Cell
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Working of PV cell
•The PV cell is made of the semiconductor material which is neither a
complete conductor nor an insulator.
•The light incident on the semiconductor material may pass through it.
•This property of semiconductor material makes it more efficient for
converting the light energy into electric energy.
•When the semiconductor material absorbs light, the electrons of the
material starts emitting.
•This happens because the light consists small energized particles called
photons. When the electrons absorb the photons, they become energized
and starts moving into the material.
•Because of the effect of an electric field, the particles move only in the one
direction and develops current.
•The semiconductor materials have the metallic electrodes through which the
current goes out of it.
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•Consider the figure below shows the PV cell made of silicon and the resistive load is
connected across it.
•The PV cell consists the P and N-type layer of semiconductor material.
•These layers are joined together to form the PN junction.
•The junction is the interface between the p-type and n-type material.
•When the light fall on the junction the electrons starts moving from one region to
another.
Working of PV cell
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The different combinations of cells are used for increasing the
output efficiency.
There are three possible ways of combining the PV cells.
• Series Combination
• Parallel Combination
• Series-Parallel Combination
Combination of PV Cells
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Series Combination of PV Cells
•If more than two cells are connected in series with each other, then the output
current of the cell remains same, and their input voltage becomes doubles.
•The graph below shows the output characteristic of the PV cells when connected in
series.
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Parallel Combination of PV cells
In the parallel combination of the cells, the voltage remains same, and the
magnitude of current becomes double.
The characteristic curve of the parallel combination of cells is represented below.
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Series-Parallel Combination of PV cells
In the series-parallel combination of cells the magnitude of both the voltage and
current increases.
Thereby, the solar panels are made by using the series-parallel combination of the
cells.
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Solar Module & Solar Panel
The solar module is constructed by connecting the single solar cells.
And the combination of the solar modules together is known as the solar panel.
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Advantages of Photovoltaic Cells:
Environmental Sustainability: Photovoltaic cells generate clean and green energy as
no harmful gases such as Co2, NO2 etc are emitted. Also, they produce no noise
pollution which makes them ideal for application in residential areas.
Economically Viable: Operation and maintenance cost of cells are very low. The cost
of solar panel incurred is only the initial cost i.e., purchase and installation.
Accessible: Solar panels are easy to set up and can be made accessible in remote
locations or sparsely inhabited areas at a lesser cost as compared to conventional
transmission lines. They are easy to install without any interference to the residential
lifestyle.
Renewable: Energy is free and abundant in nature.
Cost: Solar panels have no mechanically moving parts except in some highly advanced
sunlight tracking mechanical bases.
Consequently, the solar panel price for maintenance and repair is negligible.
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Disadvantages of Photovoltaic Cells:
•The efficiency of solar panels is low compared to other renewable sources of
energy.
•Energy from the sun is intermittent and unpredictable and can only be
harnessed in the presence of sunlight. Also, the power generated gets reduced
during cloudy weather.
•Long range transmission of solar energy is inefficient and difficult to carry.
•The current produced is DC in nature and the conversion of DC current to AC
current involves the use of additional equipments such as inverters.
•Photovoltaic panels are fragile and can be damaged relatively easily.
•Additional insurance costs are required to ensure a safeguard to the
investments.
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Applications of Photovoltaic Cells:
•Solar Water Heating
•Solar-distillation
•Solar-pumping
•Solar Drying of Agricultural and Animal Products
•Solar Cooking
•Solar Electric Power Generation
•Solar Thermal Power Production
•Solar cars,
•solar trams,
•solar buses and
•Street lights also seen to operate with the help of solar energy.
•Small gadgets that involve little energy, such as calculators, watches.
• Nano-technology
•Satellite Communication
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