May 31st, 2010 | Author: admin
Magnifier Fresnel
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LED Lighted Desk Magnifying Lamp $58.00 This heavy duty LED desk magnifying lamp is great for doing precision work and as a low vision aid. The 12" arm allows you to easily position the ultra light-weight fresnel plastic lens to different heights. (55) super bright, long-lasting LEDs provide plenty of light to illuminte the lamp. Ideal for work on jewelry, as a low vision aid, reading "fine print", photography touch up, hobby work, elec... |
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US $4.63
With the concept of solar heating, home heating bills can be kept quite low, even nonexistent. There are quite a few ways to go about this, but they are all generally categorized under two main groups; those that utilize active solar power generation, and then there's passive solar power. Of course, most people who are designing their homes to truly benefit from this source of free energy, saving themselves utility costs, opt to attack this from both angles. So then, what are some of the ways in which this can be implemented in our homes? Let's take a look at a couple...
With passive types of solar heating, home habits are the simplest to implement - it's all a matter of having window curtains open to let the light in, and with insulated windows the way they're made today, they're practically heat lenses and act as magnifiers of heat for a passive solar house. Something a little more complicated involves the use of clear plastic cylinders filled with water, with half of the inner side colored black, perhaps also utilizing plastic Fresnel lens arrays. The dark color absorbs the sun's rays more efficiently and heats the water which is then circulated throughout the house to provide a form of passive solar heating. As a stand alone unit for the sole use of heating hot water, this can replace the conventional hot water heater in a passive solar house.
With active solar heating, home heat can be provided even through electrical means, as photovoltaic solar cells would be actively producing electricity for the whole home. This is a lot more efficient today than it was decades ago when solar panels first started becoming quite popular. Like other energy conservation systems, solar panel production has gone through quite a lot of developmental stages over the years, and with more efficient means of production and using higher quality materials, the cost of these has become phenomenally low in comparison. What's more is that the energy output of photovoltaic cells is vastly superior to what it was decades ago. Now a single one today can do the work that quite a few could do back in the early to mid seventies.
Using solar heating, home energy costs can be greatly reduced - but more importantly, fossil fuels need not be consumed, nor do the by-products of burning them need to be blasted into the sky. Solar power is probably the cleanest alternative energy source there is, when you really think about it. With this resource of free energy, saving our wallets is just one side of the coin... saving our environment is the necessary other. This type of energy use is perhaps the simplest there is, as far as systems utilizing energy reaped from the environment goes. Take what the sun gives you freely.
If you're interested in learning more about solar heating home and other things related to alternative energy, then you've got to check out the EcoPlusHome project. Bryan Kenny and his family are an average North American family with one exception...they're living in the EcoPlusHome.
The EcoPlusHome is a prefabricated home powered by alternative energies like solar thermal, geothermal and photovoltaic. Bryan and his family will show the world that it is possible to live self sustained for a 12 month period by showcasing their journey living in the EcoPlusHome on their blog.
Bryan and his family welcome you to join their journey to self sufficiency on their blog http://ecoplushome.com/blog.
Posted in Designer Eye Glasses | 
Tags: fresnel, fresnel_lens, lens, low-vision, magnifier, magnifying fresnel lens, optics, solar