Solar thermal power plants can be categorized or subdivided into three types, … The panels used in the photovoltaic plant are of two types or two forms. A solar energy plant uses the power of the sun to produce electricity. Like the parabolic and linear systems, the dish-shaped, mirror clad, surface directs and concentrates sunlight onto a thermal receiver at the dish's focal point. This heated fluid is then sent to a heat exchanger to boil water in a conventional steam-turbine generator to generate electricity. Since the area-specific power density is limited, the irradiation is concentrated by an optical system onto an absorber to obtain elevated temperatures allowing an effective transformation of heat into mechanical work. On an average scale, high-salinity water can reach upto 90 degrees Celsius with low-salinity layers maintaining around 30 degrees Celsius temperature. This hot, salty water can then be pumped away for use in electricity generation, through a turbine or as a source of thermal energy. Solar PV power plants work in the same manner as small domestic-scale PV panels or the tiny one on your calculator but on steroids. Solar panels constitute the most important element of the whole plant as they convert sunlight into electricity. Solar thermal power plants use the energy of solar radiation to provide the heat needed to operate a thermal power cycle. PV panels do not concentrate energy they simply convert photons into electricity that is then transmitted somewhere else. These sorts of solar thermal power plants work by concentrating sunlight from huge parabolic mirrors onto recipient tubes that run the length of the mirror at their point of convergence. Unsubscribe at any time. Solar Thermal power plants generate heat and electricity by concentrating solar energy that in turn builds steam, which helps to feed a turbine and a generator to help produce electricity. Also solar power plants are installed as back up of electricity. Introduction Solar power plant is based on the conversion of sunlight into electricity, either directly using photovoltaic (PV), or indirectly using concentrated solar power (CSP) is thermal power plant. Generally, the AC power is used for household appliances.A solar inverter helps many devices that run on DC power to run on AC power so that the operator makes use of the AC power. Both of these power plants use discretely different kinds of techniques to extract the power of sun. This mechanical power then runs to a generator or alternator to generate electricity. Despite the fact that there are several different types of solar thermal power plants, they are all the same in that they utilize mirrors to reflect and concentrate sunlight on a point. Under the working state of the solar tower thermal power plant, all heliostats in the concentration field reflect daylight through double-axis tracking of the azimuthal angle and altitude angle to the receiver mounted on the solar tower in order to thermal the heat transfer fluid inside the receiver of receiver. In the tower, the solar energy is used to heat the air at 700 degree Celsius. And then that liquid is collected at a central collection to generate super heated, high-pressure steam. These systems use Fresnel lens effect, which allows the use of large focusing mirror with short focal length and large aperture, and this type of setup allows to focus sunlight around 30 times more than the normal intensity. linear Fresnel reflector systems, place the receiver tube above several mirrors to allow the mirrors greater mobility in tracking the sun. These tend to consist of oversized satellite dishes that are clad in a mosaic of small mirrors that focus energy onto a receiver at the focal point. Heated fluid from the dishes receiver is used to move pistons in the engine to create mechanical power. These kinds of power plant tend to have the following basic components:-. Likewise, a few towers utilize water as the heat transfer fluid. Currently in U.S, there are three solar power towers, which are operating. In a normal pond or body of water, water at the bottom of the pond is heated, becomes less dense and rises setting up a convection current. How they work depends on the technology used. Sign-up to get free updates to Solar Power Nerd. 2. Help in generating electricity easily . Salt concentrations levels increase with depth and, therefore, density also increases from the surface to bottom of the lake until the solution becomes uniform at a given depth. Easy DIY Power Plan is a new do-it-yourself program for those interested in becoming energy-independent by building their own miniature “home power plants. More advanced systems are currently being researched and tested that will use nitrate salts because of their higher heat transfer and storage properties compared to water and air. As the high-salinity water doesn’t blend effectively with low-salinity water above it, convection currents are contained inside each discrete layer and negligible blending or mixing between them occurs. Construction and working principle of Solar power plant Figure shows a solar power plant with a low temperature solar engine using heated water from flat plate solar collector and Butane as the working fluid. Because of their parabolic shape, these kinds of reflectors are able to focus between 30 and 100 times the normal sunlight intensity on the collector. Solar rays penetrate the pond and eventually reach the bottom of the pool. That in turn builds steam that helps to feed a turbine and generator to produce electricity. The course taught new recruits, students, and experienced employees, as well as Test and Data Services HR and management, how to effectively look for clients and employees, how to research companies to prepare for contact and interviews, how to conduct themselves during the interview using what they had learned through their research and a through a clear understanding of their own body language and that of the interviewer, and how to follow up on the interview. Many industrialized nations have installed significant solar power capacity into their grids to supplement or provide an alternative to conventional energy sources while an increasing number of less developed nations have turned to solar to reduce dependence on expensive imported fuels (see solar power by country). This power plant setup over there amasses a total of 18000 km squared in area and houses more than 2000 heliostats, which concentrate sunlight on the central tower, which is 60 meter high. Much like their parabolic mirror cousins, linear concentrating systems collect solar energy using long, rectangular, U-shaped mirrors. The silicon atom has four valence electrons. Your email address will not be published. Solar panels or modules are designed to supply electric power at a certain voltage (say 12v), but the current they produce is directly dependent on the incident light. The U.S. Army is developing a 1.5 MW system at the Tooele Army Depot in Utah with 429 Stirling engine solar dishes. Saltwater normally frames a vertical saltiness inclination, known as a halocline, with low-saltiness water on the top and high-saltiness water at the base. Solar panels that convert solar power into electricity usually generate DC current with voltages up to 1500v. These types of plant generate electricity that is then, usually, directly fed into the national grid. In most types of systems, a heat-transfer fluid is heated and circulated in the receiver and used to produce steam. In the solar photovoltaic system, solar energy is directly converted to electric power. They tend to be made from amorphous silicon (aSi), cadmium telluride (CdTe), cadmium sulfide (CdS),  and copper indium (gallium) diselenide. Concentrating solar power plants produce electric power by converting the sun’s energy into high-temperature heat using various mirror configurations. They tend to generate DC current with voltages up to 1500 v; - These plants need investors to transform the DC into AC. This concentrated solar energy heats up a fluid that continuously flows through the tubes. They're used in the Mojave Desert in California and have withstood hailstorms and sandstorms. These types of systems use the Fresnel lens effect that allows for the use of a large concentrating mirror with a large aperture and short focal length. A solar dish's concentration ratio is much higher than linear concentrating systems, and it has a working fluid temperature higher than 749 degrees Celsius. The panels themselves come in various forms: - Crystalline solar panels - As the name suggests these types of panels are made from crystalline silicon. In spite of certain drawbacks, the solar power plants make the right use of the sun’s energy and have till date been successful in supplying electricity all over the world. These types of facility tend to consist of a large 'field' of parallel rows of solar collectors. The most common type of heat engine used in dish/engine systems is the Stirling engine. Each forms are going under a lot of advancements over time and due to these advancements, the gap between them is becoming very close over time. Floating solar power plants installed on water surfaces, so these panels are naturally cooled, due to that the temperature rise of panels is less compared to roof top solar power panels. In order to maximize the sunlight capture, these mirrors are setup in a north south orientation. Solar power plants produce negligible pollution as compared to thermal power plant. Photovoltaic power plants utilize photovoltaic cells also known as solar cells to convert solar energy directly into electricity. Solar dish/engine systems always point straight at the sun and concentrate the solar energy at the focal point of the dish. Generated steam runs the turbine coupled to a generator which produces electrical energy in Thermal Power Plants. 2.1 Linear, Parabolic Trough Solar Thermal and Solar Dish Power plants, These systems tilt to keep track of the sun throughout the day. Solar Power Nerd was created to give you the latest updates on solar powered, panels, lights, decorations and more. These power plants have following components: The materials used in most of the photovoltaic cells are made of semiconductors; these materials are usually some form of silicon. Thermal power station’s working principle is “Heat released by burning fuel which produces (working fluid) (steam) from water. This kind of power plant has been in use in Israel at the Beit HaArava Power Plant since 1984. All solar power systems work on the same basic principles. Though the initial installation for the solar power plant is expensive due to the advancement in technology the price of these plants are dipping down . Just like Parabolic systems, solar dishes also use mirrors to focus the solar energy on to the collector. Since these towers have thermal energy storage capabilities so that allows the system to generate electricity during nigh time or during cloudy weather, when there is no sun. Solar power plants come in a variety of shapes and sizes. - Solar panels that convert sunlight into useful electricity. Typically, you will find that attached to each solar array is a solar inverter (a power inverter designed explicitly for use with photovoltaic cells) – with static solar inverters being the most common in this day and age due to the lack of moving parts, which as we explained before, means less maintenance. Some towers also make use of water as the heat-transfer fluid. These solar panels are made from materials namely copper indium (gallium) diselenide, morphous silicon (aSi), cadmium sulfide (CdS), and cadmium telluride (CdTe). The first plant, SEGS 1, was built in 1984 and operated to 2015 with the second, SEG 2, operating between 1984 and 2015. Solar panels first convert solar energy or sunlight into DC power using what is known as the photovoltaic (PV) effect. The most common type of solar thermal power plants, including those plants in California's Mojave Desert, use a parabolic trough design to collect the sun's radiation. I authored a training course called Professional Profiling which was successfully rolled out through Test and Data Services training center. I found that almost all of the students the company was training had no idea of how to compose and present themselves, both physically and on paper, in the professional environment as these learners all came from disadvantaged communities. This technique acts as a thermal trap inside the lake which can either be utilized at that point of time or can be stored for later use. In similarity to parabolic mirrors, linear concentrating systems collect solar power using rectangular, U-shaped long mirrors. The facility is spread over an area of 18,000 km squared that houses more than 2,000 heliostats that focus sunlight onto a central 60-meter high tower. The heat is captured in the boiler region and then with the help of steam turbine, the heat is used to produce electricity. I created professional CVs, professional profiles, and professional cover letters which accompanied CVs to leading companies all over the world. Efficient monitoring systems are placed in the whole are to control and manage the power plant. They work on a very simple principle which is to absorb the light and then convert it to power. All solar thermal power systems have solar energy collectors with two main components: reflectors (mirrors) that capture and focus sunlight onto a receiver. In the following article, we'll take a quick look at the different types of solar power plants that harness the sun's life-giving sunlight to produce electricity. If we talk about in terms of efficiency then mono-crystalline versions are more efficient than others are. Source: One interesting example of this kind of power plant can be found in Juelich, North-Rhine Westphalia, Germany. Solar energy consists of particles called photons, which strike the surface of photovoltaic cells present in between the two semiconductors. This setup allows these kinds of systems to focus sunlight approximately 30 times the normal intensity. They come in a variety of 'flavors' with each using discretely different techniques to harness the power of the sun. The power plant management will employ step up transformers, if the power plant generates power in excess of 500KW. Long distance transmission allows remote renewable energy resources to displace fossil fuel consumption. This kind of power plant can be found in Juelich, North-Rhine Westphalia, Germany. Required fields are marked *. To deliver a cost-effective and energy-efficient solution, solar power plant design & engineering work plays a vital role. Photovoltaic power plants generate electricity and then that electricity is fed directly into the national grid. As compared to linear concentrating systems, the concentration ratio of solar dish systems is much higher. This is the principle photoelectric effect which we mentioned earlier as well. As sunlight falls over a solar cells, a large number of photons strike the p-type region of silicon. These solar panels consists of a series of films that extract light in different parts of EM spectrum. Unlike parabolic systems, however, linear Fresnel reflector systems, place the receiver tube above several mirrors to allow the mirrors greater mobility in tracking the sun. There have been reports which have proved that they have withstood sandstorms and hailstorms. The first plant, SEGS 1, was built in 1984 and it operated until 2015. One of our pharmaceutical industry owners from Vadodara wanted to go solar. To keep track of the sun all day, these parabolic systems tilt and thanks to their parabolic shape they can focus more intensively on the collector with a good range. By subscribing, you agree to our Terms of Use and Privacy Policy. A grid-connected photovoltaic system, or grid-connected PV system is an electricity generating solar PV power system that is connected to the utility grid. So the life time of panels increases due to less stress on panels. 1. This setup allows the banks of mirrors to track the sun from east to west throughout the day. Because of their parabolic shape, these kinds of reflectors are able to focus between. 4. The DC power can then be stored in a battery or converted by a solar inverter into AC power which can be used to run home appliances. Then with the help of a turbine, this hot salty water can be used for the production of electricity or as a source of thermal energy. I edited and improved on these documents and then returned them via email to the individuals who requested them. These panels are ideal for applications as flexible films or for integration purposes within structural development like roofing tiles. For example, no liquid heat-carrying agent, like water, is needed as in solar thermal plants. When photons from sunlight hit the semiconductor material free electrons are generated which can then flow through the material to produce a direct electrical current. As of now it is clear that photovoltaic modules produce DC electricity. Solar thermal power/electric generation systems collect and concentrate sunlight to produce the high temperature heat needed to generate electricity. This makes these towers really appealing and these are very well suited for operating in adverse weather conditions. Solar ponds are designed to impede this process by adding salt to the water until the lower levels become completely saturated. Working of sunlight based power plant Sun based power plant have an extensive number of sun oriented boards associated with one another to get a huge voltage yield. Some are currently in development in Chile too. The U.S. Department of Energy and other electric utility companies built and operated the first demonstration solar power tower near Barstow, California, during the 1980s and 1990s. All the types have been elaborate below. What is thermal generation? Hi friends, in this article I am going to discuss about solar panel working principle and hope you will like my effort. Solar Panel generates DC (Direct Current) electricity from sunlight, solar inverter convert this power to AC (Alternative Current) and run your electrical home appliances and machines. The heat is captured in a boiler and is used to produce electricity with the help of a steam turbine. This method is able to concentrate sunlight as much as 1,500 times than would normally be possible from direct sunlight alone. At this point the solar energy is collected and converted to heat energy, which creates steam and runs a generator. The last plant built, SEGS IX, with an electricity generation capacity of 92 megawatts (MW), began operation in 1990. Solar energy is available at free of cost. The facility is spread over an area of, Today, in the U.S., there are three solar power tower plants in operation. Solar-Thermal plants work like this: Solar collectors capture and concentrate sunlight to heat a synthetic oil called therminol, which then heats water to create steam. In this video I will show you Photovoltaic Solar Power plant Working and battery is used in Solar Power Plant or not? The system, which was created by a 45 year-old geography teacher named Ryan Taylor, claims to provide all of the details and instructions necessary to build a simple home generator thats capable of saving as much as $2,650 a year on … The Direct current(DC) then needs to be converted to Alternating current(AC) using an inverter, before  it can be used or fed into the electrical grid. This year my youngest will graduate. Solar dish systems always point straight to the sun and concentrate the power at the focal point of the dish. Photovoltaic power plants are quite different from other solar power plants as they utilize the photoelectric effect directly without there being a need to use other devices or processes. On average the high-salinity water can reach 90 degrees Celsius with low-salinity layers maintaining around 30 degrees Celsius. A solar power plant is any type of facility that converts sunlight either directly, like Photovoltaics, or indirectly, like Solar Thermal plants, into electricity. Solar power plants work on solar energy which is available in abundant on the earth surface at most of the places. I assessed the entire reason for the shortfall and came up with a training solution to correct this problem, which was successfully implemented. This was developed to lift water for irrigation purposes. Saltwater naturally forms a vertical salinity gradient, known as a halocline, with low-salinity water on the top and high-salinity water at the bottom. It’s a really good thing, when it comes to powering the lives and homes of people in a safe, clean and renewable way. While I was very happy in my job at Outsourcing Innovations, I was unable to continue to work due to a serious injury from a car accident in December 2004 in which my back, neck, and nervous system were severely injured. 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