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If you are thinking of solar refrigeration, it is more likely that you would stumble upon the idea of storing vaccines. Most of the third world countries use the solar refrigerator to store the medication at a proper temperature. The vaccines are easy to spoil. These refrigerators, now, are also used for preserving the vegetables, dairy products and meat. There are various types of solar refrigerator: portable and battery supplemented ones. The solar refrigerator used in vaccine cooling is generally coupled with the batteries anyway. There are many advantages to the batteries. One of them is that they enable you to store the power for the variable weather conditions. They can last weeks in the cloudy days. This is why most people prefer them, but there is a dark side to them as well. Batteries are of course very costly and burden one with extra maintenance charges. It may be quite tiresome schedule to replace them every three years. They contain hazardous chemical elements which when disposed leads to water pollution. In the hotter parts of the world, these acid lead batteries are not usable. One the other hand, the portable solar powered refrigerators have surged in their popularity in the developing countries. Part of the reason is of course its affordability. In the third world countries, the rates of electricity are already so high that they can worry any house owner. The rates of the rental properties are shooting up day by day. Portable Solar Freezer, to some extent, eases this tension. So much so, these portable fridges are made from the household material which is in abundance. This abundance makes the whole thing more cost-effective. Meanwhile, one can store the perishable goods at a temperature as low as six degree Celsius. That too without any power consumption at all. These fridges seem to have two cylinders with the, they are called inner and outer cylinders. The one fits into another leaving some room between the two. Now the space between these two cylinders is filled with some organic material like wood, or plastic that is saturated with the water. After having it fixed, the homeowners expose it to the sunlight. Consequently, the sun starts to evaporate the water from the surface in turn cooling the inner chamber of the refrigerator. Although these solar power refrigerators work without the solar panels, they do require a constant supply of the water to function. No unit of electricity is used in the power production, this way. Unlike any other solar powered refrigerator, they can be transported to various places easily. They draw their portability from the limited sizes of theirs. Other types of solar refrigerators are of very big sizes, and if installed once seem difficult to relocate. Now their popularity has taken route to the advanced countries because of their absolutely, eco-friendly nature.
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