Hey folks. Hope life's good.

I needed some suggestions with regards to material suitable for pumps that circulate MOL (milk of lime). My industry currently uses a grade of CI for the purpose but the casing fails after about two months or so. So there is a constant hassle of changing these p

The snubber slows the actuator near the end of travel to prevent overshoot and bottoming of the actuator piston. The implementation is relatively simple: position commands from the flight control computer are rate limited in the ARTs, with the rate limits reducing to zero near the end of travel. Thi

Can anyone recomend me an acceptace criterion for partial discharge for a 6kV motor?

A three phase 400v, 50 Hz induction motor is to have it's speed controlled by a variable frequency drive unit to 1100rpm. The frequency required is found to be 37Hz, and the motor terminal voltage is reduced at the same ratio. For the conditions above, calculate the number of poles in the motor and

When stared direct on line a three phase squirrel cage induction motor develops a startring torque of 120Nm, When started by an auto-transformer starter, the starter draws 48 amps from the supply and the motor draws 8- amps from the starter. Calculate the value of the starting torque developed by th

A three phase, six pole induction motor when connected to a 400v, 50 Hz supply runs at full load with a speed of 960rpm and draws 22a from the supply at a power factor if 0.88. If the motor has a efficiency of 90%, determine the input/output power

I am looking for help to better understand

Calculate the line current drawn by a three-phase synchronous motor operating with a 0.84 leading power factor, if when operating at unit power factor the motor draws a supply current of 1200amperes.

tell me about power factor correction of domestic load.methods,equipments and systems for above.

One of this month's articles describes the explosion of computational requirements for achieving 22 nm geometries. By some industry estimates, fabs to produce tomorrow's parts will cost $12-15 billion (with a "b") dollars instead of the "mere" $3 billion of today's version. Considering that customer

2D electronic spectroscopy reveals how plants use quantum mechanics to turn sunlight into energy. Chemists observed quantum mechanics at work in photosynthesis in marine algae, using femtosecond laser pulses to mimic the absorption of sunlight. They watched absorption and energy movement between spe

My car has a video screen in the dashboard that provides information on gas consumption, outside temperature, battery charge, and what song is playing on the radio. It's a nice 'bell-and-whistle' for car sellers, but a potentially deadly distraction for drivers. Now imagine dealing with traffic whil

The name Michael Lee-Chin may sound familiar to you, especially if have read the Forbes Billionaire list anytime between 2001 and today, where he has been featured every year. Yes, Mr. Lee-Chin is a billionaire.

Coming from humble beginnings and starting his career with a degree in engineering, L

Magnetic resonance spectroscopy has been shown to distinguish between healthy and cancerous tissue, and researchers at Temple U. have shown that they can distinguish between different parts of plants, using electro-spray mass spectrometry. Could new spectrometry methods provide a faster, less-intrus

Tweeting, twittering, 'friending,' and other electronic social linking is soaring. Even Google's gotten into the game. But is it fun and productive enough to justify the risks? Some online businesses have sprung up to help people who aren't comfortable with their personal info reaching far-flung unk

With the financial problems in Greece, the entire Euro zone is facing a crisis that some say shows how painfully flawed the Euro project was from the very beginning. The crisis calls into question the concept of bringing together countries — some rich, some poor — with a one-currency-for

Rollout of SpaceShipTwo stirred many to buy tickets for a first ride — even though price is as high as final destination, i.e. space. Say someone lost nerve and gave you their ticket. Would you blast off with the other five passengers?

The preceding article is a "sneak peek" from Aerospace Te

In designing new semiconductor devices, modeling the hardware logic in software can dramatically reduce time-to-market. Getting the model to mimic the hardware exactly, however, represents something of a challenge. But is such exactitude necessary? According to this piece from System Level Design, t

Dear All,

I am designing a sub-station for a 4 storeyed indutrial unit where I am proposing to install 2 nos. 1000kVA, 11kV/433V Dry Type Distribution Transformers on the roof top i.e. 5th floor. I propose to distribute power using sandwich type bus-bar trunking which will run from top to

Hi,

does anybody know an analytical solution for the first two natural frequencies of a rotating beam (circular cross section) with end masses at both sides.

The rotating beam is suspended in two bearings with known stiffness, but these may be neglected at this moment and only

process cost of extrusion