Human Power Energy Save the World

Nowadays, the main energy people use is from the oil and coal. These produce the huge electricity, but also produce the serious pollution, such as Acid rain, greenhouse etc. According to the present consumption rate, the coal can only be maintained 100 years, the oil can only be maintained over 80 years.

People are aware that over-reliance on fossil fuels is unwise, So people develop some clean energy, wind energy, solor energy, hydro energy etc.  Because of the technology limitations, these energy are still not perfect.

In fact, people ignore the inexhaustible energy — Human Power Energy.

Human power is kinetic energy transfere to electricity. It's is no pollution, easy to collect, most commonly used to propel bicycles, but can also be used to generate electricity and power hand-crank tools.

Some third world organizations are implementing human powered technologies to generate electricity to power computers and other appliances.

The following is the human powered application:

1. Human Powere Energy Supply Electricity to Cinema

2. Human Powered Household Appliances

3. Human Energy to Power Computers

4. Bicycle Powered LED Lamps

5. Revolving Door Supply Electricity to the Buildings  

According to estimates, an adult's power output up to 300 ~ 600 watts, that can meet electrical equipment running, except air conditioners. There are 6,000,000,000 people in the world, if everyone output 300W, the half electricity plant in the world should be closed.

It's easy to make human power system. You can DIY according to your design. But the mini generator is neccessary.

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Solar Powered Racing Car

The “World Solar Challenge, the world’s most important race for solar Mobile, across the Australian desert in the north of Darwin to Adelaide leads. On Sunday, 22 international teams continued their solar generators equipped with high-tech racer in motion. 3010 kilometers through Gluthitze were before them.

On Wednesday reached the first sun-powered vehicles crossed the finish line. The most quietest car race in the world won for the second time a Dutch student group. With 30 hours and 54 minutes was “Nuna II,” a new record and was an hour and 45 minutes faster than its predecessor in 2001, the “Nuna”. “They were really fast,” says the driver Mark Olsthoorn the AP news agency that “it is incredible just how far one can come with solar energy. I would not have believed that this is possible.” The Nuna II “reached an average speed of 97 km / h.

The twelve students from the Technical Universities of Delft and Rotterdam have their solar cars with the help of former astronaut Wubbo Ockels and the European Space Agency (Esa) assembled. The advanced solar cells, batteries and high-performance plastics were originally developed for use in space have been designed. BBC reported that the same batteries in the ESA space probe, Smart 1 “just on the way to the moon are.

As yet reached second on Wednesday, the Australian “Aurora” and the third a U.S. team from the Massachusetts Institute of Technology, the goal. Gradually, the remaining participants to Sunday in Adelaide expected – depending on how often the sun shines. The cars start with the first rays of the day and go until their batteries in the dark allow.

For the ten students of the German team Solarcar Fachhochschule Bochum is the place in the Top Five a resounding success, despite problems with the landing gear and the solar generator to be faced. “Hans Go” is the second development of a solar-powered cars, the University of Applied Sciences in cooperation with the London South Bank University has been planned and implemented. “Mad Dog II” was the last race two years ago to 16 Place. “Hans Go” reached a top speed of 125 km / h, it makes the solar-generator with a 2.4 kW motor efficiency of 96 percent.

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Geothermal Energy Produce Electricity

Conventional electric plants are fairly simple devices when all is said and done.  Most use coal, natural gas or oil to heat water, the water creates steam, and the steam turns a huge electric turbine.  The nice thing about geothermal energy is that it is easily adapted to this type of electrical generation.  The advantage is that there is no need to use fuel to heat the water to create steam, the water is already heated, sometimes to steam level, by geothermal processes.  All you need do is add the turbine and you are off on running.  For this reason, many areas of the country which have access to geothermal sources have been quick to tap those sources to create electricity.

There are three geothermal power plant technologies being used to convert hydrothermal fluids to electricity. The conversion technologies are dry steam, flash, and binary cycle. The type of conversion used depends on the state of the fluid (whether steam or water) and its temperature. Dry steam power plants systems were the first type of geothermal power generation plants built. They use the steam from the geothermal reservoir as it comes from wells, and route it directly through turbine/generator units to produce electricity. Flash steam plants are the most common type of geothermal power generation plants in operation today. They use water at temperatures greater than 360°F (182°C) that is pumped under high pressure to the generation equipment at the surface. Binary cycle geothermal power generation plants differ from Dry Steam and Flash Steam systems in that the water or steam from the geothermal reservoir never comes in contact with the turbine/generator units.

Dry Steam Power Plants

Steam plants usually rely on tapped geothermal pools where the water is already under pressure and generating steam. In these types of plants a production well has been drilled which taps the steam from an underground source.  The steam goes directly to a turbine, which drives a generator that produces electricity. The steam eliminates the need to burn fossil fuels to run the turbine. (Also eliminating the need to transport and store fuels!) Once the steam has passed through the turbine it condenses and is pumped back into the earth via an injection well, thus creating a closed loop. One of the real advantages of this type of approach is that these types of systems emit very little excess steam and gasses and very little in the way of hydrocarbons into the atmosphere. 

This is the oldest type of geothermal power plant. It was first used at Lardarello in Italy in 1904, and is still very effective. Steam technology is used today at The Geysers in northern California, the world's largest single source of geothermal power. These plants emit only excess steam and very minor amounts of gases.

Flash Steam Power Plants

Many underground geothermal sources do not have sufficient heat or pressure to use steam directly.  However, where the hydrothermal fluids are above 360°F (182°C) another process can be used called flash vaporization.  In this type of process fluid is sprayed into a tank held at a much lower pressure than the fluid, causing some of the fluid to rapidly vaporize, or "flash." The vapor then drives a turbine, which drives a generator. If any liquid remains in the tank, it can be flashed again in a second tank to extract even more energy.

Binary-Cycle Power Plants

Most geothermal areas contain moderate-temperature water (below 400°F). With these types of sources the best approach to extracting the energy is to use a heat exchanger.  In this type of approach geothermal fluid and a secondary (hence, "binary") fluid with a much lower boiling point than water pass through a heat exchanger. Heat from the geothermal fluid causes the secondary fluid to flash to vapor, which then drives the turbines. Because this is a closed-loop system, virtually nothing is emitted to the atmosphere. Moderate-temperature water is by far the more common geothermal resource, and most geothermal power plants in the future will be binary-cycle plants.

The Future of Geothermal Electricity

Steam and hot water reservoirs are just a small part of the geothermal resource. The Earth's magma and hot dry rock will provide cheap, clean, and almost unlimited energy as soon as we develop the technology to use them. In the meantime, because they're so abundant, moderate-temperature sites running binary-cycle power plants will be the most common electricity producers. Before geothermal electricity can be considered a key element of the U.S. energy infrastructure, it must become cost-competitive with traditional forms of energy. Geothermal companies are currently working to achieve of 3-5 cents per kilowatt-hour which would be very competitive with natural gas and coal plants.  This will be even be more the case if these conventional coal and gas plants are taxed for the economic impact of their carbon emissions.  Bills to do this are currently being considered by Congress and are likely in the future.

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Crossing the Atlantic in a pedal-powered submarine

An attempt to cross the Atlantic ocean in a pedal-powered submarine.

Thanks to a team of French engineers, the world has the pedal-powered submarine. The mini-sub, nicknamed the Scubster is entirely human-powered and is designed so that the driver only has to pedal to propel it underwater. The craft features a pedal belt connected to a twin-propeller system that, depending on the fitness of the driver, can reach speeds of up to 8km an hour (5mph). The mini-sub can currently reach a depth of 6 meters (20 ft), making it perfect for peddling through rivers, and shallow ocean excursions.

Of course, we’re sure you all want to know how long you can spend underwater in the Scubster. Unfortunately, while the sub’s cockpit is water-sealed, the driver has to wear an oxygen tank and mask to breathe and see. As such, time under the surface is dependent on oxygen supply. However during trials in in the Mediterranean waters off the Cote d’Azur, the submarine was submerged for a full hour.

While the 3.5m-long one-man submarine may look like the type of vehicle prefered by Bond villains, designer Stephane Rousson believes it may “capture the imagination” of high-market yacht owners—those with 60ft super-yachts, a fleet of speed boats and possibly a lair in a hollowed-out volcano.

If all goes well, then after 50 days of pedaling and sleeping in a tent erected on top of the sub, Ciamillo will be able to cross 3700 kilometers of open water from Cape Verde off the west coast of Africa to the Barbados in the Caribbean.

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Mini Hydro System–Portable Turbine Generator

The Mini Hydro System is a portable generator kit that charges a power-pack from the flow of water. The turbine part of the generator is stuck into the river bed, and the flow of the river drives the turbine. A thick wire then leads back into the power pack to charge it up.

The Mini Hydro System is designed to be an eco-friendly generator pack for remote power requirements. Of course, you’ll need to be near a river to make use of it.

Interestingly, there seems to be no protection against debris or perhaps any wildlife that might be floating in the river. I'd expect some kind of protective mesh over the blade to protect both wildlife and the turbine.

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