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#Sweden #Water-from-Air Resource Charts

28/6/2012

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Drinking water scarcity is not a problem in Sweden but it was interesting to discover the water-from-air resource indices for three locations: Göteborg (0.42), Piteå (0.31), and Stockholm (0.40). During July indices as high as 0.68 were noted—atmospheric water generators would work satisfactorily during the northern latitude summer months. A month-by-month view of the water-from air resource in Sweden can be observed on the three charts which are now available.

In 1969 a landmark scientific paper in the water-from-air field appeared in the Journal of Hydrology. The paper, authored by the Swedish researcher B. Hellström was titled "Potable water extracted from the air report on laboratory experiments". It is available for purchase from Elsevier B.V. It remains a scientifically informative and inspiring read for those of us fascinated by the potential for using water-from-air technology to improve water security in water-scarce regions.

Hellström, who was Professor of Hydraulics at the Royal Institute of Technology, Stockholm, performed water-from-air experiments with a dehumidifier machine at the Institute during July and August 1957. Earlier, in 1953 he had done non-mechanical dew collection experiments at the Institute.

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#Malaysia #Water-from-Air Resource Charts

27/6/2012

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I was motivated to produce water-from-air resource charts for five locations in Malaysia after reading the article, 'Water crisis looms in Selangor'. A southwest monsoon is causing dry weather expected to remain until September. Charts are available for the Cameron Highlands, Kuala Lumpur, Kuching, Labuan, and Pinang. Atmospheric water generators will perform at their rated capacity at all these locations with the exception of Cameron Highlands which is at an altitude of 1448 m. Even there, machine performance can be characterized as "good". Suppliers of water-from-air systems are listed on the Supplier Links page.
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#Brazil #Water-from-Air Resource Charts

21/6/2012

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Does using water-from-air technology in Brazil make sense? After all, the country contains about 20% of Earth's fresh water resources. But, there are problems in distributing drinking water to the entire population of Brazil. This paragraph from the Wikipedia article, Water supply and sanitation in Brazil reveals the reality, particularly for people in rural regions:

Access to piped water supply in Brazil stood at 77% and access to improved sanitation also at 77% in 2006.[1][7] Coverage is significantly higher in urban areas, where 84% of the Brazilian population live. Urban coverage is 96% for water and 83% for improved sanitation, including 53% access to sewerage, the remainder being accounted for by on-site sanitation. Coverage in rural areas, where 16% of Brazil’s population lives, is much lower. It stands at 57% for improved water supply and only 37% for improved sanitation. Geographically coverage is lowest in the country’s poorest regions: particularly in predominantly rural North, Northeast, and Center-West.

Filling the gaps in drinking water distribution infrastructure, with atmospheric water vapour processors (atmospheric water generators) can be a useful alternative. The water-from-air resource is plentiful in much of Brazil as shown by the Water-from-Air Resource (WFAR) annual indices for nine Brazilian sites tabulated here:

Picture: Table with nine cities in Brazil and their Water-from-Air Resource Annual indices
When the water-from-air resource monthly index = 1.00, the expected drinking water production rate from a atmospheric water generator (AWG) at the site should be the same as the machine's specified water-from-air production rate. Water-from-Air Resource annual index grades:
        Excellent: Index is greater than or equal to 1.00
        Good: Index range 0.76 to 0.99
        Fair: Index range 0.51 to 0.75
        Poor: Index range is less than or equal to 0.50

Water-from-Air Resource charts are now available for nine Brazilian cities: Belem, Goias, Iguatu, Manaus, Parana, Porto Alegre, Recife, Rio de Janeiro, and Sena Madureira. The charts show the monthly variability in the water-from-air resource.
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#Philippines #Water-from-Air Resource Charts

19/6/2012

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Water-from-Air Resource charts are now available for Iloilo, Manila, Surigao, and Zamboanga in the Philippines. These cities represent a range of climates in the archipelago which consists of 7,000 islands between 4° N and 21° N latitude.

Iloilo (Panay Islands) and Manila (Luzon Island) represent the tropical monsoon climates of the central and northern islands respectively.

The near-equatorial climate of the southern islands is represented by Surigao and Zamboanga. Surigao is on the eastern side of Mindanao Island while Zamboanga is on the west side.

These four Philippines cities are all excellent sites for water-from-air machines with Water-from-Air Resource Annual Indices ranging from 1.33 to 1.43.

 
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Afghanistan Water-from-Air Resource Charts

15/6/2012

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Water-from-Air Resource Charts are now available for Kabul and Kandahar. These charts tell you which months of the year are best for atmospheric water generator operations at specific locations.
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Natural gas powered water-from-air system in Australia

14/6/2012

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World Environmental Solutions Pty Limited of Australia has developed a natural gas powered system called MultiGen which does the following:
- produces water from air
- heats and air conditions buildings
- generates electricity

A press release today said a system to be installed at an Australian Government Education Institution in the Riverina district of New South Wales has a water-from-air capacity of 450,000 L per year (1232 L per day). The water will be used for landscape irrigation.

This is an example of water-from-air technology maturing and moving into the mainstream of water supply solutions.
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Sanakvo Foundation water-from-air project

7/6/2012

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I recently discovered an interesting web site about the Sanakvo Foundation's water-from-air project. The Sanakvo process is passive, needing no mechanical or electrical energy input. It consists of two steps:
  1. Absorption of water vapour into a glycerol solution
  2. Solar distillation to recover liquid water from the glycerol solution
The Sanakvo Foundation or Stiftung Sanakvo is a Swiss, non-profit, humanitarian foundation. Their goal is to develop and supply the Sanakvo process to people in regions suffering from clean water scarcity. The website explained that, "Sanakvo" means "healthy water" in Esperanto. Please visit the Sanakvo site following their link on my Project Links page.


2 Comments

    Roland Wahlgren

    I have been researching and developing drinking-water-from-air technologies since 1984. As a physical geographer, I strive to contribute an accurate, scientific point-of-view to the field.

    Discover previous interesting and informative scientific/technical posts by clicking "<<Previous" at the bottom of each page!

    Buy the
    Drinking-Water-from-Air Technology: Investor's Guide ("WFA 101").


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