Archive

Archive for the ‘Extreme Engineering’ Category

MARS

October 15, 2011 Leave a comment

Necessity… the mother of invention.
Plato

Almost all the inventions (so far), happened due to some necessity. The crucial challenge, humans face at present is to find an alternative source of energy rather than rely on fossil fuels, due to the limited availability and ill effects it impinges upon planet earth.Innovative ideas struck human brains and end up in new inventions.One such marvel is

MARS – Magenn Air Rotor System.

MARS 1

MARS Megann Air Rotor System

Magenn Power’s MARS is a Wind Power Anywhere solution with distinct advantages over existing Conventional Wind Turbines and Diesel Generating Systems.

MARS is a lighter-than-air tethered wind turbine that rotates about a horizontal axis in response to wind, generating electrical energy.

This electrical energy is transferred down the 1000-foot tether for immediate use, or to a set of batteries for later use, or to the power grid. Helium sustains MARS and allows it to ascend to a higher altitude than traditional wind turbines. MARS captures the energy available in the 600 to 1000-foot low level and nocturnal jet streams that exist almost everywhere. MARS rotation also generates the “Magnus effect” which provides additional lift, keeps the MARS stabilized, and positions it within a very controlled and restricted location.

Mars Technology

All conventional wind generators use bladed two-dimensional disk-like structures and rigid towers. The Magenn Power Air Rotor system is a closed three-dimensional structure (cylinder). It offers high torque, low starting speeds, and superior overall efficiency thanks to its ability to deploy higher. The closed structure allows Magenn Power to produce wind rotors from very small to very large sizes at a fraction of the cost of current wind generators.

The distinct advantages of the Magenn Air Rotor System design are as follows:

  • Magenn Air Rotor System is less expensive per unit of actual electrical energy output than competing wind power systems.
  • Magenn Power Air Rotor System will deliver time-averaged output much closer to its rated capacity than the capacity factor typical with conventional designs. Magenn efficiency will be 40 to 50 percent. This is hugely important, since doubling capacity factor cuts the cost of each delivered watt by half.
  • Wind farms can be placed closer to demand centers, reducing transmission line costs and transmission line loses.
  • Conventional wind generators are only operable in wind speeds between 3 meters/sec and 28 meters/sec. Magenn Air Rotors are operable between 1 meter/sec and in excess of 28 meters/sec.
  • Magenn Air Rotors can be raised to higher altitudes, thus capitalizing on higher winds aloft. Altitudes from 400-ft to 1,000-ft above ground level are possible, without having to build an expensive tower, or use a crane to perform maintenance.
  • Magenn Air Rotors are mobile and can be easily moved to different locations to correspond to changing wind patterns. Mobility is also useful in emergency deployment and disaster relief situations.
The performance specs of a 100 KW MARS ia as tabulated.


Inch By Inch

January 14, 2011 Leave a comment

These are the photos taken during construction of the Hoover Dam Bridge Bypass.

Creeping closer inch by inch, 900 feet above the mighty Colorado River , the two sides of a $160 million bridge at the Hoover Dam slowly takes shape. The bridge carries a new section of US Route 93 past the bottleneck of the old road which can be seen twisting and winding around and across the dam itself.
This bridge is providing a new link between the states of Nevada and Arizona . In an incredible feat of engineering, the road is supported on the two massive concrete arches which jut out of the rock face.


The arches are made up of 53 individual sections each 24 feet long which have been cast on-site and are lifted into place using an improvised high-wire crane strung between temporary steel pylons.

The arches are measuring more than 1,000 feet across. The structure looks like a traditional suspension bridge. After the arches are complete, the suspending cables on each side are removed. Extra vertical columns are then  installed on the arches to carry the load.


The bridge has become known as the Hoover Dam bypass, although it is officially called the Mike O’Callaghan- Pat Tillman Memorial Bridge, after a former governor of Nevada and an American Football player from Arizona who joined the US Army and was killed in Afghanistan.

Work on the bridge started in 2005 . Around 17,000 cars and trucks are crossing it every day.

The dam was started in 1931 and used enough concrete to build a road from New York to San Francisco . The stretch of water it created, Lake Mead , is 110 miles long and took six years to fill. The original road was opened at the same time as the famous dam in 1936.

The completed Bridge looks like this

Follow

Get every new post delivered to your Inbox.