HydroFan - Pico Water Power (part 1)
Jeff Davis,December 2, 2006
This is a concept model of a water powered stove fan called the HydroFan. The goal of this design is to provide a powered fan for cook stoves which is powered by a few gallons of water placed above, in a container, and to the side of the stove. The water would flow through a tube setting a water wheel in motion. This water wheel would be coaxial with a fan which ultimately provides the stove with forced draft via duct work leading to the stove. The water would be collected by a shroud and drain into a container resting on the floor. Later this water would be emptied into the top container for later use. Possibly a valve like device could be used to vary the RPMs of the fan.
In other words, this is a gravitational battery and motor pico prime move. Frankly, I'm skeptical in regards to battery powered fanned stoves. What about people that can not afford this type of technology or what if something happens in the world that prevents all people from having batteries, motors and solar cells for recharging.
In the future, I plan to investigate the possibilities of applying HydroFan technology to generating a small amount of electric for LED lighting.
My first prototype was a paper water wheel and the water from a sink faucet (Picture 1). This seemed encouraging! Next I measured the water flow at 300 ml/minute. Twenty minute cook time would consume 6 liters of water, 300 ml x 20 = 6000 ml or 6 liters. This seemed hopeful. BUT, THIS IS JUST WILD SPECULATION CONCERNING THE VOLUME OF WATER NEEDED!
Picture 2 is of the fan. It was made from an aluminum pop can. A tin can would work also if not better.
Picture 3 shows the water wheel which was also made from the same pop can. Of course a tin can would be a better choice but aluminum is easier to prototype.
Picture 4 shows the coaxial assembly.
You will find the HydroFan in action in picture 5.
In picture 6 you can see the bucket of water and the HydroFan.
At this point in time I do not know if this is a practical replacement for the battery powered fan. If not, maybe it will help someone create a workable solution. However, if the HydroFan proves workable it would be best manufactured at the cottage industry level.
The book "Behemoth: The Story of Power" (www.knowledgepublications.com) was the source of my inspiration for the HydroFan.