The Solar Generating Sunflower That Desalinates Water Too

ibm solar airlight energy

A new piece of solar technology from IBM not only provides electricity – it can desalinate water for sanitation and drinking

Computer giant IBM last week revealed the prototype of its advanced solar electricity generators: a 30ft-high concrete “sunflower” fitted with wafer-thin aluminium mirrors and a maze of tiny tubes for carrying coolant through the heart of each device. The machines, which will be built in conjunction with the Swiss company Airlight Energy, can convert 80% of the sun’s radiation into electricity and hot water, it is claimed, with each generating 12 kilowatts of electricity and 20kW of heat on a sunny day, enough to supply several homes.

At the device’s official unveiling in Zurich, executives for both companies said they hoped that by 2017, when their sunflower generators should be ready for the market, they could be manufactured for half to one-third of the cost of comparable solar converters today. According to IBM, the machine’s secret lies with the microscopic tubes that carry water through the cluster of photovoltaic chips at the heart of each device. This system has already been adopted by IBM to cool its high-performance supercomputers. “We were inspired by the branched blood supply of the human body,” said Bruno Michel, from the IBM Research laboratories in Zurich.

The sunflower operates by tracking the sun so that it always points in the best direction for collecting its rays; these are then focused on to a cluster of photovoltaic cells that are mounted on a raised platform. The cells convert solar radiation into electricity. However, without the microchannel cooling system, which carries distilled water through the chips, temperatures would reach more than 1,000C. With the microcooling system, which carries water to within a few millimetres of the back of each chip, temperatures are kept down to 90C – a far safer, and far more efficient, operating level. Electricity is generated while the system also produces large amounts of hot water from the cooling system. “That hot water is a game changer,” added Michel. “Electricity is obviously vitally useful but so is the heat – for we can use it for desalinating water.”

Continue reading “The Solar Generating Sunflower That Desalinates Water Too”

Lets Stop Desertification By Planting Forests

The above is a clip from “Greening the Desert” with Geoff Lawton, located in Jordan.

Documentary about turning around and regaining land lost to desertification. Geoff helps turn a baron desert into a thriving forest. He talks us through the process of transforming the desert ground via processes that included things like desalination (desalting soil), water retention via swales, heavy mulching, planting legumes and many other things and they basically end up building top soil and in turn fertility.
This is the full documentary on the subject by Geoff: http://www.youtube.com/watch?v=xzTHjlueqFI

Also check out this Dutch Documentary “Green Gold” about a guy called John Liu who documented the Chinese rehabilitating large scale damaged eco systems (the size of the Netherlands), effectively stopping desertification:

John Liu’s full documentary that the above discusses, “Hope in a Changing Climate”: