A practical example of solving environmental problems utilizing nanotechnology

Posted on by

Carbon nanotubes are 'strange' nanostructures in a sense that they have both high mechanical strength and extreme flexibility. Deforming a carbon nanotube into any shape would not easily break the structure, and it recovers to original morphology in perfect manner. Researchers in China are exploiting this phenomenon by making CNT sponges consisting of a large amount of interconnected nanotubes, thus showing a combination of useful properties such as high porosity, super elasticity, robustness, and little weight. The nanotube sponges not only show exciting properties as a porous material but they also are very promising to be used practically in a short time. The production method is simple and scalable, the cost is low, and the sponges can find immediate use in many fields related to water purification.

Erosion of Pump Casing and Impeller

Posted on by

Dear All,

i have facing problem of damage of impleller and casing of PFA lined pump.calcium chloride solution having concentration 20 to 50% contains acidity as 1%. during circulation of above solution at 120 to 130 degc pumps were damqaging.

how i can prevent the above

Programming Siemens MP377

Posted on by

Hello

I got siemens MP377 with loader Version 1.0.2.0_1.83 and WinCC flexible 2008.

WinCC flex project shows only MP377 devices with version 1.0.0 and 1.0.1.

If I select version 1.0.0 it disables compile command.

If I select version 1.0.1 it compiles the project and work

Permanent Star connection

Posted on by

Dear Sir,

Greetings

My question to you all is " How to connect the terminals of a motor in permanent Star mode"??

I have heard that if a motor is loaded less than 40%, connecting the motor terminals and running the motor in permanent star mode will save energy.

By what amount??

3 phase

Posted on by

(1)WHY WE CAN GENERATE POWER IN 3PHASE MODE ONLY NOT IN 4 OR 5 PHASE

(2)what are the safety measures in UPS ? explain all?

(3) why odd hormonics only will effect the power system.why not even hormonics

(4)When a square wave is applied to primary of a transformer the

Branson’s Underwater Explorer

Posted on by

alg_necker_nymph_virginEntrepreneur, adventurer and island owner Richard Branson is seemingly always pushing the limits of innovation and technology. One of Bransons new projects is aimed making is already exclusive private island in the BVI even more luxurious. 

Branson’s Virgin Group will be offering rides in the winged submarine called the Necker Nymph at his exclusive private island Necker Island. For now rides are limited to relatively shallow depths with the vehicle offers open views as you ‘fly’ through the ocean.

Wings on the carbon fiber submarine operate in much the same way as wings on an airplane allowing it to dive, turn and rise again to the surface. The 15 foot submarine is built by Hawkes Ocean Technologies and cost $660,000 to build.

A week of crusising in Bransons submarine costs $113,000 which inlcudes a week long stay at Necker Island. Ever pushing the envelope a deep sea sub is in the works capable of diving down to 35,000 feet beneath the surface.

For more information visit Wired.com

What's Going on with MediaCom?

Posted on by

I'm in Iowa, and MediaCom has been on and off the air more times than Paris Hilton. I heard last week that it was out in most of Iowa, and parts of illinois and indiana. It was off just now for two hours, and is back up--long enough, I hope, for me to get this question off.

Anybody know what's

Radiation by Reflection

Posted on by

Hi All

I want to design an Infrared Oven in which about 10 IR bulbs having 150W power each will be used .The problem is that the objects are hand formers made of porcelain. The hand formers are considered as complicated dimensionally .

How can I distribute IR energy uniformly on many forme