Solar Definition and 1000 Threads

Solar power is the conversion of energy from sunlight into electricity, either directly using photovoltaics (PV), indirectly using concentrated solar power, or a combination. Concentrated solar power systems use lenses or mirrors and solar tracking systems to focus a large area of sunlight into a small beam. Photovoltaic cells convert light into an electric current using the photovoltaic effect.Photovoltaics were initially solely used as a source of electricity for small and medium-sized applications, from the calculator powered by a single solar cell to remote homes powered by an off-grid rooftop PV system. Commercial concentrated solar power plants were first developed in the 1980s. As the cost of solar electricity has fallen, the number of grid-connected solar PV systems has grown into the millions and gigawatt-scale photovoltaic power stations are being built. Solar PV is rapidly becoming an inexpensive, low-carbon technology to harness renewable energy from the Sun. The current largest photovoltaic power station in the world is the Pavagada Solar Park, Karnataka, India with a generation capacity of 2050 MW.The International Energy Agency projected in 2014 that under its "high renewables" scenario, by 2050, solar photovoltaics and concentrated solar power would contribute about 16 and 11 percent, respectively, of worldwide electricity consumption, and solar would be the world's largest source of electricity. Most solar installations would be in China and India. In 2019, solar power generated 2.7% of the world's electricity, growing over 24% from the previous year. As of October 2020, the unsubsidised levelised cost of electricity for utility-scale solar power is around $36/MWh.

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  1. D

    Optimal Tilt Angle of Solar Array

    Hello! I have a difficult problem I have been working with recently. I have been trying to model the ever changing position of a solar PV array system. The system is a single axis tracker and orientates itself to have the smallest angle of incidence(AOI) to the suns beam as possible (the best...
  2. A

    Absorption and solar radiation spectra

    Hi, I'm hoping someone can advise me on the best place to find the absorption spectra for water (fresh) and ice, for the wavelength range UV to IR. Also, I'm looking for the solar radiation spectrum at the surface of the Earth (i.e. after atmospheric effects have been taken into account)...
  3. B

    Seeding a Solar System Simulation

    I've coded a physics simulator that simulates the solar system. Essentially it just calculates gravity between bodies and attracts them together, the most basic simulation. But obviously just feeding in positions for the sun and the planets will just have them all fall into directly each other...
  4. Y

    Can Graphene Be Effectively Used in Solar Sails?

    I am wondering if the properties of graphene could have implications for solar sails. I don't know much about graphene but I do know that it is only an atom thick and very very strong and theoretically can be made of infinite size. Are there any problems that graphene would face in terms of...
  5. J

    How accurate are simple models of the solar system?

    How accurate are "simple" models of the solar system? Exactly how much effect does the perturbation of other planets have on planetary orbits? That is, if we were to take a naive model of the solar system, just applying Kepler's laws to each planet individually, with no planet-planet...
  6. T

    Where Can I Find Accurate Data for Simulating Solar System Orbits in Java?

    Hi, i'm attempting to simulate the Solar System in Java. I'm particularly interested in simulating orbits of celestial bodies that might enter our solar system. Therefore I need real data for my simulation. That is: x,y,z coordinates of planets with respect to the Sun (taking the sun to...
  7. A

    What Size Solar Cell is Needed to Recharge a 12V Battery Bank in 8 Hours?

    Hi all, If I have a battery bank 12V@1000A- what size solar cell (kW) will recharge this battery bank (from flat to full) over a 8 hour period?
  8. Gliese123

    Which planet in this solar system would be most appropriate to terraform?

    I've been reading about terraforming and really stuck with it. Which planet /moon has the most convenient conditions, such as mass, magnetic field, gravity, intensity of sunlight for possible terraform. Venus, Moon or Mars or some else? Which one do you think? And would it be possible? Basic...
  9. C

    Solar power plant: steam quality questions

    Hey guys, I'm an engineer working on the design of a small start up solar power plant. The solar power plant will operate using "solar troughs" instead of the traditional photovoltaic cells. In these systems water is the working fluid and sunlight is focused from a solar reflector onto a pipe...
  10. A

    Solar lighting for remote yurt/cabin

    Greetings- Thanks for the opportunity for a biologist to glean some info on e. engineering. My wife and I are taking over two established yurts (16' D fabric-sided shelters) used primarily for winter recreation. Current lighting from white gas lanterns. Flammable liquids that need to be...
  11. U

    Solar sail using radioactive decay

    Could you make a solar sail that derives it's energy from the decay of a radioactive element such as plutonium, uranium, or palonium? I understand that such elements radiate in all directions but if you had a 1 kg sphere of it attached to a boon which was attached to a reflective sail (e.g...
  12. C

    Stargazing Solar Eclipse - Are we just lucky?

    Looking at the earth-moon-sun system, it just so happens that: . The sun is ~400 times the size of our moon . Our moon is ~400 times further away from the sun than from the earth The sun and moon look ~ the same size from Earth and hence during alignment, allows the almost perfect...
  13. D

    Compute temperature rise from solar irradiance

    Homework Statement (This is not a homework problem; it comes from a real-world problem I'm trying to solve.) Sunlight is falling on an absorptive object. What will be equilibrium temperature of the object given the solar irradiance (I) and the ambient temperature? I = solar irradiance =...
  14. zonde

    Magnetic bubbles at the edge of the solar system and CMB

    This article http://www.physorg.com/news/2011-06-big-edge-solar.html" tells about discovery of magnetic bubbles at the edge of solar system. As I understand they are around 100AU from Sun and around the size of 1AU. That makes them roughly 3.6° angular size. Shouldn't these bubbles cause...
  15. D

    Solar cells: How much they absorb, reflect and diffuse

    Hey folks not sure if this is the right section but I'll give it a go... I'm trying to out find out what percentage of photons a solar cell (preferably gallium arsenide solar cells) will absorb, reflect and diffuse. I have read, from a few links, that the highest absorption rate for silicon...
  16. A

    Spectacular solar eruption 7 june 2011

    AIA 304 AIA 211 AIA 171 Another Look at a Spectacular Event Now with SDO and LASCO The CMS is expected to make a glancing blow late 8 June/ early 9 June Some newspapers are predicting GPS disturbance and black-outs
  17. S

    Solar Cells that can absorb energy from bulbs/Tubelights

    Hi, I am sorry if this is in the wrong place. I had an idea of using Polymer-fullerene solar cells (http://en.wikipedia.org/wiki/Konarka_Technologies#Polymer-fullerene_solar_cells) in Mobile phones to recharge its battery using Indoor lights. But , unfortunately, these cells are of...
  18. M

    Simulation of formation of a solar system

    Are there any usable simulation in the literature on the formation of a solar system? It is possible for example that a solar system has 100 big planets?
  19. S

    Maxiumum Incident power on solar cell ?

    Hi I have simulated a dual junction(Multijunction) solar cell of thickness 10 microns and length 20 microns in silvaco atlas device simulator. In order to calculate its efficiency i need exact value of incident solar power i.e Pin for the above said structure. These are the parameters...
  20. J

    Optimizing Solar Panel and Battery Setup for a 24/7 Pump System

    Right now I am working on a small pump that is capable of running on solar power for 24 hours a day. So far, I have solar panels with specs at typical irradiance/temp of 1000Wm^-2 and 25C: Pmax = 135 W Vpmax = 17.7 V Ipmax = 7.63 A Voc = 22.1 V Isc = 8.37 A Area = 1m^2 and batter(ies) with...
  21. P

    Solar constant and the Earth surface

    [b]1. We all know that the solar constant is 1350Watt.m^-2, which is related to a unit surface perpendicular to the solar rays. The question is: which is the average solar intensity on the Earth surface? [b]2. first, the portion of the EArth surface is half the EArth sphere. second, we...
  22. S

    From Computer Science to Solar Energy Engineering

    I'm currently studying computer science, but I'm convinced solar engineering is where I'm supposed to be. I have some robotics courses coming up junior and senior year, but I would like to know what are some of the engineering courses I could take during the summer to prepare me for a graduate...
  23. mcodesmart

    Solar Panel Efficiency: Temperature Effect

    Does the temperature of a solar panel decrease its efficiency?
  24. T

    How do astronauts suits protect them from Solar Radiation?

    I assume, that when in orbit, astronauts are still somewhat protected by the Earths magnetic field? However, what about when they're on the moon? Does the Earths magnetic field extend that far? If not, how do they protect their bodies from harmful radiation?
  25. D

    Calculating Solar Array Orientation for Scientists

    Hello! I was hoping someone on this board might be able to point me in the right direction to solve my problem. I am trying to determine how the tilt angle (from the horizontal) and azimuth of a solar array changes as the array rotates around a fixed axis running from north to south. The...
  26. G

    Solar panels and radar in Earth's orbit

    Hello, I am planning to design, and maybe build, a CubeSat, or a satellite that is 10cm x 10cm x 10cm, and weighs less than about 1.5 kg. I am looking to have 6 solar panels on the cube, one on each face, and also have a full 360º in all directions radar, along with a GPS and some radio...
  27. L

    Question about the concept of electricity in solar cells.

    Ok so I understand how a voltage source works, with electrons flowing from a high potential to a low potential. But I'm a little confused about solar cells. So the way they work is that an incoming photon strikes an electron and gives it enough energy to break free and create a current. But...
  28. A

    Calculating Output of Solar Cells in KWH

    hi, I am working on a small solar cell project for which i bought two small solar cells panels of 6volt each producing current of 5.263milli ampere in combination. I want to know that how can i calculate the values of solar cells output in kwh, on the output i have placed two bulbs of 3 volts...
  29. ddelaiarro

    Correlating Temperature to Solar Load

    BLUF: Is it possible to mimic a solar loading environment solely in a temperature chamber and, if so, how? We have an 6061 Aluminum box with a known heat load inside. It needs to be subjected to a solar load IAW MIL-STD-810G, Method 505.4, Proc I. Essentially, it is a 24-hour exposure cycle...
  30. L

    How Does a Thin Haze Layer Affect Sunlight Scattering?

    Homework Statement A thin haze layer overlies the ground and is composed of hydrated aerosols of 0.2 micron (µm) diameter. It scatters 50% of sunlight incident upon it when the sun is directly overhead. a) What is the visible scattering optical depth of the layer? Homework...
  31. D

    Solar Energy Without Solar Cells?

    http://www.physorg.com/news/2011-04-solar-power-cells-hidden-magnetic.html
  32. marcus

    April is the time to see where the solar system is going (at 370 km/second)

    The Hubble law v=Hd is basic to Cosmology. Among other good things, it teaches us an absolute criterion for motion and idea of time ("universe time") that are useful in Cosmology. The Law refers to distances d between stationary observers---observers at rest relative to the Background of...
  33. nukeman

    These Homemade Solar Panels .Do they even work?

    These "Homemade" Solar Panels...Do they even work? http://solarpanelhandyman.com/uncategorized/how-to-make-a-diy-solar-panel-simple-steps/" I am trying to figure out a project to make for a class of mine, where we have to build a "Green" type system, bla bla... Has anyone ever tried? Do...
  34. M

    Phosphor Powder for solar cells

    someone just asked this as a comment on an article i was reading http://home.howstuffworks.com/fluorescent-lamp6.htm 'Does a phosphor powder give off a photon or electron when struck by light?' I was just thinking maybe a solar cell made of phosphor powder to emit electrons. I...
  35. R

    Fraction solar power due to UV

    Hello, I was wondering what fraction of the energy delivered by the sun is due to UV-radiation. For example, when I have a solar panel which "catches" 1kJ of solar energy. What will happen if there would be no UV frequencies in the solar spectrum? How many percent less energy will I capture...
  36. R

    Help with Modeling Solar Wobble for Pre-Calc Project

    I'm a junior in high school and was recently assigned an open ended project in my pre-calculus class to research how precalc (or the basic calculus we have started) can relate to the real world. I have a strong interest in astronomy and physics and therefore desire to look at modeling the wobble...
  37. B

    Solar Reactor using water tubes & dish collector.

    Hi, The dish is roof mounted and fixed. I want to heat water tubes coming from the base up to the focal point and I'm needing to know if this is sound or a tube coming from the base will never get enough focal point to heat it because it's fixed and not on a heliostat. Or, does the water...
  38. R

    Idea for optimising solar collection

    Hello, looking for help designing building/testing and implementing an idea, I have been thinking about using cheap flat panel magnifying lenses on a hinge and pivot, that track the sun, and then having a fiber optic at the focal point, and then having multiple fiber optics terminate at the...
  39. M

    New 3D model of solar system and night sky

    Hi, for all of you we´ve made new user-friendly interactive 3D model of solar system and night sky with real-time planet´s positions. http://www.solarsystemscope.com/ (requires flash) Application in a simple way helps students and laymen to understand the movements of the planets and...
  40. S

    Solar vs Conventional Inverters: Exploring Protection Devices

    How does solar inverter differ from conventional inverters? And what are the various protection devices inside the solar inverter?
  41. Q

    Are solar cells more efficient for specific frequencies of light?

    my understanding is that energy is wasted in a solar cells when light with more frequency than necessary to make an electron cross the band gap comes along and the excess energy is converted to heat. does this mean if you only shined blue light at a solar cell which had a perfect electron gap...
  42. I

    Solar flares triggering seismic events

    Well I'm sure a lot of us have seen websites predicting the end of the world from solar flares causing earthquakes. I'm a physics grad student and with my limited knowledge I have the impression that all such theories are pseudo scientific. But still I want to ask the question. It is...
  43. S

    What are the differences between a solar cooker and a solar oven?

    What is the different between solar cooker and solar oven ? Are they same ?
  44. F

    Boost Your Energy Efficiency: Discover the Benefits of Floating Solar Panels

    http://www.scientiaweb.com/2011/03/04/floating-solar-panels/ Sea is the place where they should be but too far from power grids :|
  45. Eagle9

    Energy from solar panels and electro motor

    As known, the Earth receives that solar radiation and its value approximately is equal to 1.4 W/m² (data taken from here: http://en.wikipedia.org/wiki/Solar_radiation ). Now imagine that there is some electric motor placed in the Earth’s orbit and it rotates the rod with some certain mass (let’s...
  46. S

    Are Solar Storms More Impactful at the South Atlantic Anomaly?

    Does the Van Allen Belt dipping closer to the Earth at the South Atlantic Anomaly mean the Earth's surface underneath (like South-Eastern Brazil) is more exposed to solar storms..? My terminology might be slightly-off here: do Singular proton events (SPEs) affect the SAA area more as the...
  47. H

    Solar panel powered fountain HELP

    Hi I am senior in Electronics Engineering Technology and for my senior project my professor suggested a solar panel/water fountain but I am not sure on where to start exactly or how it operates. Please HELP .. :'(
  48. S

    Java Program in JAVA which simulates the solar system

    Hi I need to write a program in JAVA which simulates the solar system. I'll be using the Beeman's algorithm seen here: http://en.wikipedia.org/wiki/Beeman%27s_algorithm" My question is that if I have the vectors for : velocity, acceleration and position how do I decompose them into there x...
  49. N

    Exploring the Impact of Dark Matter on Galaxies and Solar Systems

    Okay, so I understand that galaxies spin more like a frisbee than the solar system, and that there is evidence for a lot of non-light-emitting mass (such as gravitational lensing) but how would dark matter account for the difference in the spin of galaxies? Gravity still decreases inverse to the...
  50. T

    The Frost Line of the Solar System

    The Frost Line is the distance from the Sun where the radiation from the Sun becomes too dim to make ice sublimate into vapour. See e.g. http://en.wikipedia.org/wiki/Frost_line_%28astrophysics%29" . It is important because it explains why only terrestrial planets exist inside this boundary. I'm...
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