Solar energy Definition and 87 Threads

i have to come up with expression that governs the rate of solar energy incident upon the Earth with radius of Earth, Re, power output of Sun 4*10^26 and distance from Earth to Sun as 1.5*10^11. But i have no idea how to get the expression HELP

I have been trying to find some values for how much watts per square meter there is of energy on the ground due to the sun, but everywhere there are different values ranging from 100-1000 Watts so I have no clue of what to believe... And also are these values per second/minute/day? So however...

Forgive my noobness and possibly the wrong forum selection. As we live within collecting distance of an energy abundant star, would it not be possible to harness that energy, through delicately polished mirrors mounted on satellites and then direct those satellites at a few key points around...

[SIZE="5"] what % of solar energy is converted to solar neutrinos, assuming energy released in all forms per unit time , say 1 second as 100%?

Can we calculate the daily energy generation of 20KW power pack if have the following information: Date Time GHI DNI DHI 01-01-2008 08:00 0 0 0 01-01-2008 09:00 149 398 75 01-01-2008 10:00 348 686 98 01-01-2008 11:00 512 792 112 01-01-2008 12:00 626 845 119...

What do you think? http://www.amnh.org/nationalcenter/youngnaturalistawards/2011/images/aidan_large_08.jpg http://ca.news.yahoo.com/blogs/good-news/teen-aidan-dwyer-uses-fibonacci-sequence-solar-energy-182220725.html

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...

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

i am about to do a project on harnessing solar energy using fresnel lens. However, i do not understand how a fresnel lens works. Could someone please clarify how it works (how can it converge light despite having a flat face) and why does it have more converging ability than other lenses?

I was wondering how long it takes to heat up materials. And how long will they hold their energy? Say for like thermal energy storage, how long does it take to heat up molten salts or other substances with sunlight? I guess I could just use Q=mcT and divide by time and then solve for time...

Hello. I want to work with Photovoltaics and with the renewable industry. Electric motors, boats, cars. Is EE a good choice? I was thinking first in ME but looks like you see more of solar energy in EE. Please i need urgent advice i only left like 2 moths to make a choice.

Homework Statement At Earth’s location, the intensity of sunlight is 1.5 kW/m^2. If no energy escapes Earth, by how much would Earth’s mass increase in a day? (Radius of Earth is 6.37 × 10^6 m.) The Attempt at a Solution ok so, at anyone time, half of the Earth is lit. so surface area lit =...

our proposed thesis will be about solar panel..we want to design a circuit that will maximize the usage of the energy of the sun, whenever it is available in greater amount using microcontroller. we would like to ask some ideas to realize this project in order for us to complete our requirements...

I am currently working on a project that requires me to design and analyse a solar powered. My motor has features such; 36v (Max), 300A (Max), 93% efficiency, 2.5mΩ, 12kW (Max). I used the maximum power and the efficiency to calculate the power input (from the battery). How do i calculate the...

Homework Statement Current solar-panel technology has the efficiency of converting 12% of the solar energy to electricity. Given that on a sunny day in Arizona the average solar radiation energy flux is 1.0 kW/m^2 , and that the area of Arizona is 3.0 × 10^5 km^2 , 1. What percentage of...

anyone can help me about solar energy, discussion only.,tnx

I have just purchased 20 2w solar panels, i am brand new at this kinda stuff but i am very very interested in how it all works. can anyone help me, or explain how its done basically i would like to be able to charge a battery with solar panels.. thanks ..

Hi everyone, Can anyone tell me how to build simple solar energy generator for kid of age 5 – 7 year? Please tell and send me with some drawing. Thank you very much in advance Huygen

hi... i have a thought in advance, that i can charge my cell phone through solar energy itself . actually I am doing my activities regarding that... giva me some suggestions which is helpful for me.. and i want to know why this is still not in market..my project is reasonable or not ?...

I've been involved for a long time going over astronomical influences on climate. My job is to be an astronomer and I don't know about climate. Maybe you think this is impossible, but I think it would be too complex to say whether a record of some sort within the ice was the driving force of all...

I will be do a project soon on a topic that I pick. I am interested in solar energy but one of the requirements for the project is to show calculations related to your topic. Are any calculations that wouldn't be to hard that might be relevant or should I find another topic?

Homework Statement Negelcting internal heat sources, the surface Temperature of the Earth is calculated to be 255 K. Its actual mean surface Temperature is 288 K. The additional heating results from the greenhouse effect. Regarding this as an internalk heat source, calculate that heat source...

I am an amateur science/engineering enthusiast (AA electrical engineering), I would like to design/build a solar energy system consisting of a small tracking parabolic mirror heating a steam boiler to drive a small turbine-generator. The mirror I am thinking 3 foot diameter and I have some idea...

I am to design a laboratory experiment to compare the energy conversion rates of two standard methods for solar energy to be 'trapped' for domestic use. See below*. I need to compare the two systems and find out which is more efficient. The energy source should be a standard 150W light bulb...

Homework Statement Given Information: At midday, solar energy strikes the Earth with an intensity of about xxxW/m^2 Question: What is the area of a solar collector that could collect xxxMJ of energy in xxxHours ? Homework Equations The Attempt at a Solution I'm having...

The average American uses electrical energy at the rate of about 1.5 kilowatts . Solar energy reaches Earth's surface at an average rate of about 300 watts on every square meter.What fraction of the United States' land area would have to be covered with solar cells to provide all of our...

Homework Statement In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. Assume...

Hi, I am new to this forum and wondering if anybody would be kind enough to help me. A solar panel of area 2 m2 absorbs solar energy at the rate of 950 W/m2. Assuming that all the energy is used to heat water in a 110 litre tank how long would it take for the water temperature to...

solar energy heat energy light energy... i am a student in high school. and i want to ask someone about the basics of solar energy. i want to create a solar system that can heat up water. anyof you can give some advices/ equation/model/ for my idea. is ther possible if a solar cells can run...

I'm stuck on a formula I'm using to design a solar water heater at uni (and no, I'm not a physics student, otherwise I'd probably be kicking myself its such a stupid question) and I understand the theory behind it, I just can't work out what the Qs stands for. ^T=Qs / mC where ^T= change...

hey frenz , Plz let me know about an Airconditioner working on solar energy.How does it work.Wheather any reaserch is going on this project? Is any breakthrough has happened?Any help is welcome.

In this question, "Solar energy reached the Earth at the rate of about 1.4 kW per square meter of surface perpendictular to the direction of the sun. By how much odes the mass of the sun decrease per second owing to this energy law?" What is your first reaction to this question? How would...

Solar energy flux, Earth's population... Hi everyone :smile: I have this one question from my optics course that has me totally stumped. It reads "Solar energy flux at Earth's position is about 1.7kW/m^2. Estimate the maximum possible population of the Earth." I've looked through my...

Is it possible to have solar panels one over the other with little space between them to get 10 panel stacked structures to increase the amount of solar energy absorbed? There are four solar panels. Another 4 on top of them leaving some space between this four and the bottom four. In the...

my teacher said that all greenhouse gases is good at absorbing heat energy,but not solar energy. I think it was wrong because i think that solar energy should consist of heat energy and light energy. And also, for an example ,carbon dioxide is absorb infrared rays and then give out infrared...

Does anyone have any ideas on how to use a solar panel and its energy to create cool air.. or to cool say a copper coil.. Thanks in advance.. :approve: -John By the way AIM is strim302

i need help on a physics project that is due tuesday. the objective is to use a small solar collector to collect energy, and turn that energy into other forms of energy, ultimately to heat a beaker of water. my goal is to change it from solar to posibly chemical or something else, then heat...