Solar Energy » solar thermal energy

in animals, a portion of kinetic energy is usually transformed into:?

admin — Sun, 25 Dec 2011 01:37:30 +0000

a. chemical energy b. potential energy c. solar energy d. thermal energy e. more kinetic energy p.s. if you arn’t going to answer right aka robert down there, then please don’t bother. Thermal Energy. Because the temperature of the body … Continue reading →

With respect to thermal energy, in the form of radiation from the sun – why does a solar water heater?

admin — Sat, 19 Nov 2011 00:33:33 +0000

i: use copper pipes ii: have a black surface iii: has a large suface area 1/ Copper is a good heat conductor (which is a reason not to use it!). But it is:- easy to work with, relatively cheap, and … Continue reading →

Solar energy that makes it to Earth’s atmosphere is transformed to thermal energy.Thoroughly explain how.?

admin — Mon, 14 Nov 2011 06:12:21 +0000

This is an extra credit i really need please help it would be very helpful!!!!

The simple answer is through electromagnetic interaction. The photon energy of the incoming radiation is transferred in whole or in part to atoms in the atmosphere. As these atoms absorb the energy they begin to move faster, and collide with other particles. Before you know it, there is a large area of faster moving atoms and molecules, raising the temperature of the surrounding area and producing thermal energy.

How is Solar Thermal energy used?

admin — Sat, 12 Nov 2011 00:18:47 +0000

Is this energy resoure used in Australia? and if so to what extent? (Is it a large-scale energy resoure, or just used on a small scale? Where in Australia is it used – accross most of the country or only in a particluar part

Is this energy resource used across the world and if so, to what extent? Which countries are the main ones using it? Is there a reason why some countries are using it and others arnet?
Thanks

Are you speaking of Solar energy?
Where the sun shines on Solar panels and is used to generate electricity?
People put them on the roof of their house in the UK.

They don’t use it much in Norway because they dont get much sun
Norway is steep and has rivers so they use hydroelectricity there.
I believe it’s used in africa on a small scale, great sun but not much development there
Australia is very sunny and very developed, no wars no terrorists to destroy the solar panals.
Money to buy them in the frfst place.

difference between photovoltaic and solar energy?

admin — Thu, 01 Sep 2011 14:48:35 +0000

what is the difference between them both? Or are they the same? and what is solar thermal energy? its all really confusing! can someone explain what they are?

Thanks in advance!

Photovoltaic is one form of solar energy utilization. But not the sole manner of producing energy.

Passive solar energy uses simply the heat energy from sunlight to heat a space, heat water, etc. with no external power inputs. It is broadly used terminology but has one point in common- the primary energy input is from sunlight. Whether it is used to heat water, to heat air to heat a house, or to create electricity, the common factor all is just the power of sunlight.

To look at a good long list of projects, and general and specific information, check out http://www.builditsolar.com

difference between solar thermal and photovoltaic energy?

admin — Tue, 09 Aug 2011 00:36:40 +0000

You are referring to types of ways to collect the sun’s energy. All the sun’s energy is comes to the Earth as electromagnetic radiation. (no it is not radioactive) PV cells capture mostly visible light and transform it directly into electricity. Commercial efficiency is relatively low at around 10 to 15% but because the technology is scalable, can be used on house roofs, shades the roof and double uses the land area it is very popular.1

Solar thermal collectors and concentrators allow the sun’s energy to heat a target and then the heat is collected.2 Often the biggest loss of energy is when it is transformed to heat and must be dissipated. Solar thermal panels and concentrating technology transforms the sun’s light to heat. Because you are now collecting what was formerly simply waste the efficiency is much higher and solar thermal panels can be from 60 to 80% efficient. If we use this heat directly to heat hot water, buildings or convert this heat directly into air conditioning the overall efficiency remains high and ROI or payback periods continue to be high. If we convert the heat to electricity the efficiency will fall but generally continue to be higher than PV panels.

What energy conversion occurs when a solar panel uses light to provide power to a house?

admin — Fri, 24 Jun 2011 10:49:47 +0000

A) Electrical energy is converted to solar energy. B) Nuclear energy is converted to solar energy. C) Radiant energy is converted to electrical energy. D) Thermal energy is converted to electrical energy. C – Light (Radiant energy) is converted to … Continue reading →

when cheap, stored and abundant solar thermal energy?

admin — Fri, 03 Jun 2011 23:57:35 +0000

no chance for dangerous nuclearists.

storage
a thermal pile can be cheaply realized by using the passage of solid and liquid phases.
1 m3 of NaCl(very cheap) can be melted by using about 300 kwh of thermal energy.
1 m3 of silicium needs more than 1000 kwh of thermal energy for melting!
BIG VALUES !!!

cheap and abundant solar energy.
I can realize a big hole in the ground, panel it with aluminium foil so that I can reflect solar beams on a target placed in the ground !
I can close this big hole with glass…for protecting it against dust, rain etc…
Less than 5°000 kmq of Arizona’s surface can be able to produce the double of the actual Usa nuclear energy…

heat of vaporization would be used for heat transfer…: liquid(solar heat absorption) –> vapour –> liquid(heat release)

SO WHEN !?………………………………..

HI,
Can you plz be more specific about your question,i mean what you really want to know about Solar panel technology.
I go through your each step,but could not get your question.
Anyways i know one good site from where you can get details about solar panel installation.

http://homepowergenerator.co/

Hope it can help you.
Thanks

Thermal Mass/Solar Energy – Need help!! Quick 10 pts.?

admin — Wed, 11 May 2011 17:45:25 +0000

Had to do a lab that involved placing three different objects (empty can, a can filled with water, a brick) under a light and recording the temperature every 15 minutes for 45 minutes, then the light was turned off and the temperature was recorded every five minutes for 15 more minutes. Here were the results:

http://img705.imageshack.us/i/tablelab.png/

From the data, which preformed best a thermal mass? Explain in terms of the data.

How could you improve the bricks’ ability to absorb solar energy?

After turning off the light, where is most of the heat lost? What could we do to cut down on this heat loss?

Thanks alot!!

It’s AMAZINGGood luck to you.

http://goodsyard.info/54875/can-filling

Costs of solar thermal energy?

admin — Thu, 14 Apr 2011 21:56:24 +0000

Solar thermal is one of the least expensive and most effective ways to use solar energy.

There are different ways of using it to heat water or your home, some more costly than others. The overall cost will depend on where you live. The more temperate the climate the cheaper it’ll be.

Check out

http://www.solarpowerathome.com/solar-power-water-heater.html

for some suggestions and answers to your solar thermal questions.