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Green Transportation
The Challenge:
1) We need to wean ourselves off of fossil fuels, including to replace essentially every existing car and truck with ecological alternatives such as compressed air cars, gas-electric hybrids, hydrogen cars, and biodiesel.
2) The average meal travels 1,500+ miles from farm fields to the dinner table. Organic food often travels even farther, and both organic and factory farmed foods are increasingly being shipped from the other side of the world. We need to shorten product distribution networks to make more efficient use of fuels.
Green University® LLC Solutions: High efficiency and alternative energy vehicles such as plug-in hybrids and compressed air cars are rapidly being developed for mainstream markets. the meantime we can utilize what we do have: hybrid-electric vehicles that use less gas, along with biodiesel as a low-cost fossil fuel substitute, plus we can develop circular distribution networks to reducing shipping costs:
- Gas-Electric Hybrids: In the 1980's Rocky Mountain Institute envisioned 150+ mpg gas-electric hybrid cars made from ultralight, safe and durable fiber composite materials. They gave their ideas freely to interested automotive, aircraft, computing, and start-up companies. Then they started playing all these companies off of each other, suggesting that to keep up with the competition, they should be investing research dollars into these new technologies. The result is that at least some of their ideas have come to market in the form of gas-electric hybrid vehicles, with regenerative braking and fiber composite car bodies yet to come.
Plug-in hybrids will make it possible to charge up of the grid, or from alternative energy sources like solar. In a power outage, it is even possible to reverse the flow of energy to power lights and essential appliances in a house with the gas generator and batteries of the car.
- Hydrogen Cars: The first hydrogen powered cars on the market will likely include on-board reformers for stripping hydrogen from natural gas. Homeowners will be able to fuel up right at home, and the fuel cell may be used to generate electricity to run the utility meter backwards whenever the car is plugged in at home. The fuel supply will shift over to solar as continued price drops lead to a world where solar cells cover every available roof surface, and where even the paint on a house has solar electric capacity. We will be following these developments closely and doing whatever we can to help bring about the hydrogen revolution.
- Hydrogen Boosters: Existing gas and diesel vehicles can be retrofitted with hydrogen boosters to hopefully increase fuel economy. Hydrogen boosters use electricity from the alternator to split water into oxygen and hydrogen gas, which are routed through the air intake back to the engine. Thermodynamics dictates that it is impossible to create more energy than you start with, and the hydrogen booster would logically seem to lose energy since the original gas or diesel fuel is first burned to generate electricity, then converted to hydrogen, and then fed back to the engine. However, the benefit of the hydrogen and oxygen gas is that it improves combustion to burn the fuel more thoroughly, especially helpful for older engines. At Green University® we are currently testing a hydrogen booster on a 1982 diesel Toyota pickup.
- Air Cars: Reinforced tanks hidden underneath the Air Car can be filled with highly compressed air, which is slowly released through the engine to power the vehicle. Air cars can be filled up at home with a special air compressor unit, or filled at any outlet with the aid of an onboard compressor. A supplementary gas tank is used as fuel to heat the compressed air, expanding it to maintain pressure as the quantity of air in the tanks decreases. We hope to purchase an Air Car when they become available.
- Biodiesel and Straight Vegetable Oil (SVO): There is enough waste vegetable oil (french fry grease) from restaurants to fuel about 3% of our nation's diesel cars and trucks, but the grease is often thrown away. Many innovative individuals are already collecting this french fry grease to use as their own low-cost fuel as biodiesel, or in diesel vehicles modified to run on straight vegetable oil:
- Biodiesel: Waste vegetable oil can be converted to biodiesel in a chemical reaction with lye and methanol for about 70¢ per gallon. The chemical reaction changes the vegetable oil into a fluid diesel fuel that won't gum up the fuel lines, plus a waste product, which can be converted into soap. The resulting biodiesel can be used interchangeably with ordinary diesel fuel, without the need to modify the vehicle.
Most people are too busy to deal with the precise chemistry involved in making quality biodiesel on a small scale, but Tom's brother Alan successfully built a biodiesel processor and is now making his own fuel from waste vegetable oil. Tom and Renee also own a diesel car and truck. Interested Green University® interns may be able to participate in the fuel-making process by request.
In our opinion, the technology seems ideal for fleet operations (rather than for individuals), such as for our proposed circular distribution networks (see below), in which trucks could pick up waste vegetable oil while delivering and picking up other goods along a circular route. The fuel could be brought back to a centralized biodiesel facility for controlled processing.
- Straight Vegetable Oil: Diesel vehicles can be modified with an extra fuel tank and special heating systems to run on straight vegetable oil, without the need to process the oil with lye and methanol to make biodiesel. Instead, the fuel is filtered and dumped into the extra fuel tank. The car or truck is started on ordinary diesel (or biodiesel) fuel. As the engine is warmed up, the hot radiator fluid is piped around the secondary fuel tank and fuel lines to warm and thin the waste vegetable oil. When the oil is properly thinned, then it will flow and burn properly in the diesel engine. A switch is used to change over to the secondary fuel tank. Flipping the switch back prior to your destination causes diesel fuel to run through the vegetable oil lines, purging them before oil cools and congeals in the lines. Kits to convert a vehicle over to straight vegetable oil cost about $1,000, but once installed, the fuel itself is free.
- Circular Distribution Networks: For a farmer/producer to get their product to a store a hundred miles away, they need to either mail it, drive it there themselves, or get enough orders in enough stores so that they can ship the product to a major distributor (who may be hundreds of miles away) who will then distribute the product back to local stores. Small town grocery stores are faced with a similar problem. The wholesale price for goods delivered to a small town grocery store is often as high or higher than the retail price for the same goods at a big store in the city. Thus customers often make the drive to the city themselves, rather than buy local and pay the extra mark-up.
We propose a circular distribution network, where for example, any grocery store in Montana could order goods via computer from any producer in Montana. The producers would download all their orders, package them for delivery to different stores, and drop them off at their own local grocery store, transforming every drop-off point into a pick-up point as well. Shipping charges would be deducted from a flat rate transaction fee through the centralized processing program on the internet. A circular distribution network would be much more fuel and labor efficient, making it economically competitive to get local products to market, and economically viable for small town stores to compete with the discounts offered by bigger retailers in the city. It would also offer an efficient means for related projects, such as for collecting French fry grease from small towns statewide to run the entire fleet of trucks on biodiesel (see above).
Green University® students have the opportunity to help us transform this idea from theory into practice, owning a piece of the company upon graduation. Once successfully demonstrated, it can be mimicked by other distribution networks elsewhere.
Related Links:
International Bicycle Fund Sustainable transportation, urban planning, international bicycle tours.
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