No.1. This is my first activity.

The next photo was taken in front of a travel bureau office in Tokyo, Japan. It was a quite hot day in the summer of 2007.
Since Tokyo and other major cities become very often hot due to skyscrapers and large population, we need to cool down our cities by using less energy. This area was in the shadow of a building, so the fog could cool down the area very effectively. Many people stopped in the mist and enjoyed it. The area was 3 to 4 degree Celsius cooler than the surrounding area. It also seemed a good eye catcher for advertising of the travel bureau.

I will introduce my current activities. In August 2004, I set up 2 shower heads for gardening in the south side and the one in the east side of my home in downtown, Tokyo. The shower heads were sold at a do-it-yourself store for the gardening. Although the cooled temperature was only 2-3 degrees lower than the outside, I could actually feel a large area cooled. The first system had been used until in the middle of September day and night. The cost was about US$20 for hoses and nozzles, excluding controller. I had upgraded and improved it by the summer on 2007. This is my starting point.

Of course, the conventional electrical air conditioner is quite convenient to cool the entire room, but the confortable area is quite limited. The mist system can cool only 2 to 3 degree down, but it can cool down quite a large space including outside. It is more effective when it is windy.

At that time, I compared the cooling system and a conventional electrical air-conditioner, and found the following facts by operaing it.
With a small difference in the operating costs between electric and mist cooling system, I was able to get an impressive result for reducing environmental impact. (See the next table)
The mist cooling system reduced 90% of total amount of carbon dioxide (CO2). It is also to be noted that the CO2 amount to supply water was negligible. Since the electricity cost is at a high level due to depleting natural resources, the cost difference could be bigger than ones in 2004.

Comparison about environmental impact

Only 4% of the fog cooling compared with electric.
In the negative environmental impact of the fog cooling, 95% is the one with the fan.
The amount of the emission of water: only by 4%.

The next machine parts were used.
Shower head: 1 piece during 0.9, 0.75, and applied fire flow = 0.4 liter/minute for each
Controller: Panasonic Electric Works, Ltd.: EY4100
Hose: Water scattering hose with fiber reinforcement (φ16mm)