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Solar Heat Water with PET Bottles
Transcript of Solar Heat Water with PET Bottles
As time goes by we can see that population is growing, and with it, the urge of searching for better ways to satisfy their needs like feed, clothing, and the production of electricity, which makes our daily activities easier.
Explain the importance of the use of sustainable products as part of our daily basis by promoting the use of a homemade solar collector that it is fabricated with recycled plastic bottles, and can be used in most of the houses in Yucatan emphasizing rural communities, helping the environment and saving money.
But by solving all of these issues we face a bigger problem: pollution and that happens mainly because of the way we produce and dispose. Nowadays we see that many countries have been aware of this situation, and they try to change the way things have been made by doing it in a sustainable way.
An example of this, is the use of renewable energies sources like solar energy.
Its use has been increasing their use not only in the industry but in homes too, yet in rural areas where sometimes it hard the access to electricity or gas, the use of solar energy can be helpful to make an effort for them to have the same facilities that are provided in urban areas.
It is important to implement renewable energies such as solar energy to start replacing the fossil fuels but without forgetting the sustainability. It is therefore that we want to propose the idea of a solar collector made with recycled PET that can be use to heat water that can be used for cooking, cleaning and showering.
Solar Heat Water with PET Bottles
SUSTAINABILITY IN DEVELOPMENT COUNTRIES
Developed countries had to face the consequences of the way they produce electricity with their polluting measures, and because of that, it is important for developing countries to learn from their mistakes by implementing a cleaner way to produce their energy.
Solar energy could supply all the present and future energy needs of the world on a continuing basis. This makes it one of the most promising of the unconventional energy sources.
It is an environmentally clean source of energy and it is free and available in adequate quantities in almost all parts of the world where people live.
Even in the hottest regions on earth, the solar radiation flux available rarely exceeds 1kW/m2. Consequently, large collecting areas are required in many applications and this result in excessive costs. A second problem associated with the use of solar energy is that its availability varies widely with time.
METHODS FOR SOLAR ENERGY
The basic principle of solar thermal collection is that when solar radiation strikes a surface, part of it is absorbed, thereby increasing the temperature of the surface. A part of the absorbed radiation is then transferred to a fluid like air or water.
The evacuated tube collector consists of cylindrical modules mounted side-by-side on a common frame. These modules are formed of two concentric glass tubes, with the annular space between them being evacuated. The outer surface of the inner glass tube is selectively coated. The incoming solar radiation is absorbed on this surface and partly conducted inwards through the tube wall. The inner tube is filled with water, and the heat is transferred to the water by thermosyphon circulation.
A flat-plate collector consists of an absorber plate on which the solar radiation falls after coming through a transparent cover. The absorbed radiation is partly transferred to a liquid flowing through tubes which are fixed to the absorber plate or are integral with it. This energy is the useful gain.
$4000 + shipping
$5000 + $1400 for instalation and labor
$7,300 + $1400 for installation and labor
THE MAKING OF A SOLAR HEAT WATER
28 PET Bottles
1/2L Black Paint
4 bends of PVC
12 "TEE" of PVC
8 cuts of 1.5m of PVC (1/2')
Glue for PVC
2 Containers (45L and 60L)
1 Sheet of
2 Small Hinges
With de drill we proceed to make a ½’ hole at the bottom of the 28 bottles because the tubes of PVC have to go through them. After that, we used the black paint in the bottles because it is known that color black absorbs the heat.
We had to use two containers, one of 45 liters and other of 60 liters. The first step was, using the drill to make three holes of ½’ in the small container, one at the bottom which is the one for the feedback. On the other side from where the first hole was made we drill the other two holes, one at the top (for the entry of the water coming from the net) and the third one in the middle for the output of the hot water.
We then, covered the 45L container with the polyester to isolate and have more efficiency to keep the water hot; next, we put the container in the 60L container and mark the holes. We used the two lids to isolate more.
* Sukhatme S. P., Nayak J. K. SOLAR ENERGY Principles of Thermal Collection and Storage. Third Edition. New Delhi. Mc Grawhill. 2008.
* Goswami Yogi D., Kreith Frank, Kreider Jan F. Principles of Solar Engineering. Second Edition. Philadelphia. TAYLOR&FRANCIS. 2000
* Solar heat collector price from The Home Depot taken from http://www.ecovita.mx/Web/Calentadores-Solares.aspx (May 6th 2014)
* Solar heat collector price from Mercado Libre taken from http://articulo.mercadolibre.com.mx/MLM-448180797-calentador-solar-acero-inoxidable-130-l-_JM (May 6th 2014)
* Solar heat collector price from EcoVITA taken from http://www.ecovita.mx/Web/Calentadores-Solares.aspx (May 6th 2014)
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