63 results found displaying 40-42
    
Nancy Susan Mills
 USA
Electricity from Concentrated Wind Printer Friendly Version
How can wind be concentrated, by collecting that which it blows? Wherever the wind blows there is energy. Wind mills are successful but have requirements which limit their effectiveness. This idea has limits, but may be effective in places where windmills are not.
This process begins with a pile of fine sand placed at the bottom of a chute which will funnel the blowing sand up into a container. The container is supported on a spring which begins to compress as the container fills with sand. As the spring compresses, attached gears turn a generator. When the spring is fully compressed, at a point above the initial position of the sand pile, the container dumps the sand into a chute which funnels the sand back to its initial position. The spring then continues to generate electricity as it lifts the container back to its initial position. The process then begins again.
Reward: Satisfaction and joy 

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Martin Wallace
 USA
Urban Waste Abatement Kit Printer Friendly Version
This would be a good project for an Environmental Science/ Education Student. The physical object is quite simple, but the institution of the system would require much research and involvement.
The actuall object: A backpack that holds a 32oz thermal mug, a set of flatware, and a lenin napkin.
The hard part: One would need to do a cost analysis comparison between cost of waste removal and landfill use to the cost of distributing such a kit to all citizens of any given urban area. My assumption is that it would be very expensive to issue the kits initially, but over time the city/ community would save money from waste removal and landfill usage. The idea is to cut back on paper and styro waste from restaraunts and convenieance stores by issueing every citizen his/her own set of wares. This not only would cut back on the amount of waste, but also on the amount of litter, so there would certainly be an aesthetic value to it also. Businesses may even chose to get involved by offering discounts to patrons who bring in their own cups/ forks/ napkins etc.
I live in a somewhat progressive community, and I've seen many of the indie kids in town allready doing this on their own. I think it is a lovely idea which large urban areas could really put to good use.
Reward: No reward expected. The reward would be inherent in the execution of the idea. If a reward is necessary, perhaps to bail me out of jail the next time I get arrested for peacefull, non-violent demonstration. 

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36°

    
Colin Gross
 United Kingdom
Green Energy from the rise and fall of tides Printer Friendly Version
Background: Every object that floats in tidal areas (harbours, the sea, etc.) moves up and down with the tides. The energy that is required to lift the object and the energy disipated as the object descends is all wasted. (Imagine the energy required to lift a relatively small 2000 tonne barge.)
Practical Application 1: This energy can be harvested by connecting the object to a harbour wall or seabed. The relative movement between the fixed harbour wall etc. and moving object can be made to pressurise hydraulic fluid, this can operate an hydraulic 'wobble pump' which turns a generator.
Practical Application 2: In its simplest form this electrical energy would be cyclical, in line with 'still' high and low tides. In this simple form the energy could be sold to a national grid.
Practical Application 3: There are approx. 1500 harbours around UK. Most of them have underutilised harbour walls (built prior to the shrinking of our fishing industry). The oil industry alone discards many barges as 'unseaworthy' and sells them for scrap. A 'nodding donkey(s)' based on a harbour wall, one arm attached to a rising and falling barge and the other to a hydraulic piston(s) would produce the pressurised fluid necessary.
Practical Notes:
- Most forms of 'green' energy are complex and expensive. This one is DIY in its basic form and should provide money from selling power to the grid (in UK).
- The floating body should be relatively wide and long (not deep draught). Hence the 'barge' suggestion.
- To stabalise the electrical output - generator output could be passed to the windings of a bank of alternator/flywheels. Ideally, these would be rotating in a vacuum and suspended by magnetism (giving zero mechanical friction).
Reward: That if this idea is put to use and developed, that process in no way limits other users from using and developing this idea. 

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