Wireless Fridge: Refridgeration without Electricity


For hundreds of years a similar type of cooling has been employed by desert dwellers around the world. The concept is explained by a simple law of thermodynamics. When moisture comes in contact with dry air it evaporates. You see, water has this amazing characteristic of having a very high retention of heat (it is used in cooling nuclear reactors after all).

This ancient technology has been used for cooling water for hundreds of years. Mohammed Bah Abba took this idea one step further. By placing one pot inside another and filling the gap in between the two pots with moist sand he was able to create a refrigeration system that requires nothing more than a little bit of moisture.

The moist sand filling the gap between the two pots draws heat away from the inner pot and dissipates the heat through the evaporation of the moisture. The inner pot is filled with perishable foods that would normally last for mere days, but with this system can last for weeks.

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Snow in Saudi Arabia, Global Warming or Global Cooling? PART 2

For PART 1 and other articles click here!

Now that we’ve established the way the Earth works, and a bit about what climate is, we can now talk about the occurrence of snow in Saudi Arabia as one point of data that can contribute to the hypothesis of climate change.

As we’ve established that global climate is an average measure of temperature and precipitation, we can also interpret these abnormal conditions that we are seeing in Saudi Arabia.

The simplest explanation would be that the increased temperatures of the globe overall have increased the rates of evaporation of the Earth’s water bodies. This increase in evaporation would cause increased moisture in the air. The added moisture coupled with the cold air, which is not unusual for Saudi Arabia this time of the year would produce SNOW! See how snow works.

In general there is another way of looking at the phenomenon of global warming, and that is as climate change. As mentioned in the previous article about snow in Saudi Arabia, the Earth is one system of climatic changes that over the bigger picture can be viewed as having a long time line of climate changes. What is happening in the world right now is that certain places are undergoing local climatic changes that are affecting the overall climate trend of the Earth. Places that are usually very cold are now not as cold, while places that used to be very hot are also less hot. But when trying to balance the changes in temperature in the colder regions of the world with the changes in the temperatures in the warmer parts of the world we find that there is still a positive gain. That is that even though some places are getting cooler the change in their temperature is smaller than the places that are getting warmer. For example:

Lets say that Saudi Arabia’s average temperature in the winter is around 4 degrees. With the recent drop in temperature lets say that the average will now be 3.9 degrees (This is a serious exaggeration, not to mention the use of a single data point).

Here in Canada (Ontario) lets say the average January temperature is -14 degrees With the recent increase in temperature over the last couple of years it is now -13.5 (These are not real figures, and are used for explanation only)

If you do the math you find that the change in temperature in Saudi Arabia is -0.1 While the change in Ontario is +0.5. The net change being +0.4 degrees.

Now this is not really the case. The example I’ve used, if true, would cause a lot of problems in the world as we know it. I’m sure you’ve all heard of the worries of sea level rising, and polar bears becoming extinct. But be certain that if we don’t heed these signs, we will be heading for something very serious.

Take a look at some of NASA’s videos on these factors.

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