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Solar panels and solar cells

Extracts from this document...

Introduction

P H Y S I C S P R O J E C T. SOLAR PANELS & SOLAR CELLS By Hammaad Khalil 25th December 2002 Set 1 CONTENTS * Introduction * How solar panels and solar cells are made and how they work. * Where they are used (examples). * Why they are used? * Solar Cells. * Conclusion SOLAR PANELS SOLAR PANELS AND SOLAR CELLS. Introduction. Solar panels and Solar cells basically come from solar energy (energy from the sun). You have probably seen calculators that have solar cells and don't even have an off button. Solar panels are used everywhere as well. For example they can be found on emergency road signs and call boxes. Although these larger solar panels aren't as common as solar powered calculators, they still do the same job and are out there and not hard to spot if you know where to look. Solar cells are even used on satellites to power the electrical systems. You have probably even heard of people saying that they will start to use solar energy to power homes and offices, as this energy is completely free. On a bright sunny day the sun shines approximately 1,000 watts of energy per square meter of the planet's surface and we could collect all that energy and use it to power our homes and offices. ...read more.

Middle

Solar panels and solar cells are mainly used as they are renewable sources of energy they do not cost a penny until they are installed. After paying the initial cost you don't have to pay anything. All the energy comes from the sun and is converted into electricity for you to use at home. An example of a solar powered house is in America, it is called the, 'North Carolina House': Solar Panels From this we can see how cost effective solar energy could actually be. Even though the initial cost is a lot you don't pay after the installation is complete. It's like it's almost free! Solar panels that are fitted facing south are very effective. There are two types of solar energy these are: Active Solar Heating - Solar water heating panels use the heat of the sun to warm water directly, usually to provide domestic hot water. Once installed, a system requires very little maintenance and should last for decades, but it cannot provide all your hot water needs year-round, so a back-up system will be needed. Solar water heating is best regarded as a fuel saving measure, and can typically save about half of your water heating bills. For more information on solar water heating please refer to our book 'Tapping the Sun'. ...read more.

Conclusion

Solar powered vehicles can be seen on the market nowadays. A Honda Solar Powered Car. Solar Water Heating Over 44,000 solar water heating panels have been installed in the UK. Solar panels contain water which is heated by the sun, and this then usually goes through a coil in a hot water cylinder, transferring the heat to the water there. (If wood comes from managed forests, it is potentially a renewable fuel and is carbon neutral as it absorbs the same amount of carbon dioxide when growing as it gives off when burnt. It is important that wood is well seasoned and burnt efficiently, or it will give off harmful toxins.) In most cases solar water heating panels will not provide space heating because there is not much sun in the winter, when you need heating the most. Conclusion. So it seems to me that Solar panels and solar cells are a marvellous way to generate electricity and power everyday things. Examples as given above are things like the solar panelled car; house and even satellites use them in space. It is an extremely generous thing to do if you install a solar panelled heating system in your home as you are contributing as a member to save the ozone layer. And another advantage is that you are not paying a penny after you have had the system installed. 1 ...read more.

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