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[W89]Water From The Air
by Erik Leipoldt, Eri
Global warming causes water shortages through droughts and disappearing glaciers. It also causes polluted water sources when there are floods, such as in the aftermath of Hurricane Katrina in New Orleans.

Indeed several reports on the impacts of global warming suggest the possibility of wars between nations over water.

So there is a great and growing need to alleviate water shortages and for clean drinking water.

There are several approaches to harvesting humidity in the air around us. Of course the first is to minimise the effects of global warming through going to the causes. Reducing greenhouse gas emissions, and to "reduce, re-use and recycle" are primary strategies.

Next, there are various technologies that can help. These include

*Desalination through distillation

*Condensation

*Water absorption by salt

Desalination is now widely used but water from air technology is the next trend.

Condensation

Dr Max Whisson has been called the Water And Wind Wizard of Oz. He has patented the "Whisson Windmill", or "Water Harvester", as he prefers to call it. It harvests water from air.

How?

Well, Dr Whisson was inspired by a little African beetle which collects the early morning's condensed water from its own body. From that observation he developed his windmill that produces water from air.

As Dr Whisson has put it: "The amount of water available in the air is for all forseeable practical purposes unlimited. The bottom 1 kilometre (in the atmosphere) alone contains about 1.000,000,000,000,000 litres of water and that is turned over every few hours. The "Whisson Windmill" or Max Water From Air device will make it possible to get adequate water anywhere at any time, drought or no drought."

The water you see collecting on the ground under your car's airconditioner is an example of the same condensation process that Whisson uses.

The Whisson windmill is essentially a wind turbine which is connected to a refrigeration compressor. A refrigerant cools the blades of the wind turbine, after which it is returned to a compressor. The "free" energy from wind drives the cooled blades of the turbine and water is then condensed from the ambient air. This water is then collected.

This remarkable invention is under development with the University of Western Australia.

Similar to Whisson's Windmill water from air principle the Air Water Pty Ltd's Air Water Machines also harvest water from air by using a condensation method. Its units are on the market now, with capacities ranging from 28 litres (7 gallons) per day to 5000 litres per day (1321 gallons).

Water absorption by salt

This approach harvests water from air by forcing air through a liquid lithium chloride salt solution. This compound attracts water from the air, after which it is extracted and filtered through table salt which acts as a natural disinfectant. The final step is to filter this water through a carbon filter, adding taste.

These units can make up to 1200 gallons of drinking water per day and have been purchased by The US FESA for emergency relief purposes.

Water from air ? The Holy Grail?

So you see there are some pretty interesting developments under way that promise clean water. But are these alone the answer to a sustainable future?

We cannot use technology to refreeze disappearing glaciers or the ice caps, refill rivers, remake their entire ecology or stop rising oceans due to global warming.

More than technology is needed for that ? useful as it is. A truly sustainable future will involve love of our home, the Earth, and for each other. Simple as that.

If you have finally made the decision to install a water filter in your home, you probably noticed right away that the water was cleaner smelling and tasting. You also know that it is healthier for you and your family. But if you have started to notice after a while that the water is not tasting as good as it did, it is probably because you have failed to change the filter. The whole idea of a water filter is to trap contaminants in the filter before they can get into the water you drink. But where do those contaminants go? They are now stuck on the filter, and the filter is no longer doing its work properly. This is why it is important to check the filter cartridge and change it if it is full of "stuff". This concept is the same as an air cooler; you have to change the filter to keep the air clean. The instructions that came with your water filter will tell you how and when you should be changing your filter cartridge.

Each type of water filter you may have will need to have the filter cartridge changed periodically. There are many types of water filters, such as counter top and under the sink for drinking water, refrigerator filters for drinking water and ice, washing machine filters for cleaner clothes and shower nozzle filters for cleaner waters for daily showers. But each and every one of them has to have the filter cartridge changed if you expect it to continue to work optimally. If the filter is dirty and stopped up, it can no longer filter out deposits, metals, minerals and other sediments in the water.

Normally, when you buy a water filter, the cartridge will already be installed. There will also be instructions that come with the filter to tell you how to install the replacement cartridges, and how often. Most of the time it depends on the amount of use the water filter will have, based on gallons of water processed through it. But it may also be based on a time frame, such as every six months. The size of the filter cartridge will have an impact on how often they have to be changed. It is really important to follow the instructions, since a dirty filter is like having no filter at all. Make sure you keep spare filters so you can change one quickly when you need to.

If you failed to keep the instructions for your water filter, you can probably find out how often the filters need to be changed by going on the Internet site of the manufacturer. While you are there, you can order replacement cartridges.

But even if you don't follow the instructions, the taste and quality of your drinking water will probably tell you when the filter cartridges need to be changed.

Visit this website for more articles tips on evaporative cooler prices and air coolers.

Article Source : Pg. 4

About Author
Both Erik Leipoldt & Mr.andrew Caxton are contributors for EditorialToday. The above articles have been edited for relevancy and timeliness. All write-ups, reviews, tips and guides published by EditorialToday.com and its partners or affiliates are for informational purposes only. They should not be used for any legal or any other type of advice. We do not endorse any author, contributor, writer or article posted by our team.

Erik Leipoldt has sinced written about articles on various topics from Global Warming, Vegetarian Diet and Global Warming. Dr Erik Leipoldt has long been concerned about the effects of global warming. He is interested in
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