 | Announcement | |
| Transfer Gas Requirement |
| By bhalchandra in Chemical & Material Science |
Dear sir, We would like to transfer liquid by nitrogen pressure. The liquid transfer rate is 20 m3/hr so nitrogen required is 20 Nm3/hr. If the pressure required for transferring is 2.5 barg (3.5 bara). Then by using gas law P1V1 / T1 = P2V2 / T2 the nitrogen required is coming 6.45 m3/hr. Ple ... more |
| Correct Valve Selection |
| By josej in Instrumentation |
Dear All, For a Flare Gas Recovery Unit Application, we have One Valve Termed as Fast Opening Valve with 48." Line size /150# and Opening Time is less than 02 sec, We consider this as Emergency Depressurization with Trip from Compressor Fast Opening Valve should open and Release it to Flare . We h ... more |
| A Quick Phase AC Question |
| By StephenD420 in Electrical Engineering |
Hello everyone I am trying to make a small three phase ac stator so a rotating magnetic field will be produced. I can use a ring with an outer diameter of 3 inches and an inner diameter of 1.5 inches with each of the six poles being 1 inch with about 100 turns of 24 magnet wire or ... more |
| Winding Coils Question |
| By StephenD420 in Electrical Engineering |
Hello everyone I have a quick coil winding question. How do you layer coil turns for a coil? Do you just start at the top of the coil form and then coil over the top of the previous coil in the same direction and then just twist the two endings together for the leads at the top and bottom of ... more |
| Generator Trip in Reverse Power |
| By shahadat0303 in Electrical Engineering |
Rolls-Royce Bergen 2nos. KVGS 18G4 Leory Somer alternator 4500 KVA ( engine no. 1 & 3) and 2 nos. B35:40V 20AG Engine, AVK alternator 10600 KVA ( engine no. 4 & 5) runs in parallel operation in droop mode giving power in local grid and load feeder, Reverse power setting Engine 1 to 5 -3.0% ... more |
| Generator Droop |
| By visaseller in Electrical Engineering |
hi guys, I have problem with my generators.. whenever I parallel them the load KW start hunying and became unstable. I planning to increase the droop setting in woodward 3201D from 3% to 5%. I already contact woodward and they told me to stay with 3% but caterpillar technician advices me to increase ... more |
| Solenoid Driven By The PWM Output Of Solenoid Driver Card |
| By prvn619 in Instrumentation |
There is a 24V solenoid valve which controls the hydraulic pressure of oil which in turn controls the speed of a pump. This solenoid is driven by a solenoid driver card with 24VDC power supply and 2 potentiometers ( 1 local and 1 remote) to vary the input signal which in turn produce the output as a ... more |
| Max From A Squirrel Cage Blower |
| By NSS in General Discussion |
I have an old wood stove heater that i got from someone. i installed it and it's working great. It has a large squirrel cage blower on it. it was missing all the pullies and motor when i got it. So i looked at the set up on my LP gas Furnace. (the blower is similar in shape and size.) And mimic'ed ... more |
| Synchronous Generator In Isolated Mode Basics |
| By I_am_learning in Electrical Engineering |
Suppose, A generator is running at isolated mode and is at steady state with 100% excitation, 100% rated terminal voltage and 100% input and output power. (Internal losses asides for now and assume fixed resistive load).Keeping every other things constant,What happens when we over-excite slightly, s ... more |
| Fork Lift Traction on Pavement |
| By -A- in General Discussion |
I have a warehouse here in the Southern US that has a traction problem out on the truck docks. When there is high humidity the moisture and dust/grime on the truck dock conspire to form an incredibly efficient lubricant that makes loading and unloading hazardous. A proposed solution is to coat the ... more |
| Whelping Boxes: Features and Design |
| posted in Animal Science |
A whelping box is a place where a dog can have her puppies. The puppies can begin to grow up in the box because it's a safe place. This blog entry will describe how a whelping box was created for an English setter and her six puppies. A whelping box has several features that are important for ...more |
| Do You Need Downtime When You Are Off-duty? |
| posted in Semiconductor & MEMS Fabrication |
Do you carry a company cellphone? BlackBerry? e-mail? Does your company maintain contact with you outside of work hours or otherwise intrude on what is supposed to be your "personal" time? Do you have difficulty really relaxing as a result? Some companies have promised to stop trying to contact empl ... more |
| Unlocking Gridlock |
| posted in Automotive Technology |
The MODUM project — short for Models for Optimising Dynamic Urban Mobility — is about to commence in the European Union. In an effort to reduce automobile pollution and avoid hefty construction projects, MODUM will enable cars to communicate via wireless network about road conditions, he ... more |
| Alternative Energy at Work |
| posted in Chemical Manufacturing |
Alternative energy is consistently stressed as a means to move toward energy security and reduce reliance on foreign energy resources. Even though alternative energy is important, understanding what can be done to achieve this goal is also important. The preceding article is a "sneak peek" from Che ... more |
| Is Morbid Curiosity a Good Thing? |
| posted in Plastics & Resins Blog |
For a fee, organizers are taking tourists along to study the ocean debris caused by the Japanese tsunami. While the science of tracking the Japanese tsunami debris and how long it will take to break down is critical, is it right to let tourists tag along, even for a price? The preceding article is ... more |
| GMC Preparing to Celebrate Its Centennial |
| posted in Hemmings Motor News Blog |
A lot of people scratched their heads over GM's decision to keep the GMC division alive as it snuffed other brands over the last decade: Oldsmobile, Hummer, Saturn, Pontiac and now, it seems, Saab. But GMC consistently hauls in the money and it also gives dealers with other franchises (GM and non-GM ... more |
| Scotty and Spock's CR4 Session |
| posted in Relativity and Cosmology |
Recall the prior Blog's dialogue on the Starship Enterprise bridge, where Captain Kirk asked Spock and Scotty to go and resolve their differences in interpreting the test results (which according to Scotty implied that the two Vulcan clocks run faster than the ship's clock). Spock disagreed. So off ...more |
| NextGen Nuclear Plant Approved |
| posted in E&E Exchange |
While it has been in development for years, the NRC has now officially approved the AP1000 for construction in the U.S. The AP1000, designed and developed by Westinghouse Electric Company, is a 1117-1154 MW pressurized water reactor (PWR) which boasts a safer, simpler, and more cost-effective me ... more |
| Go Green or Bust |
| posted in Rockaholic Adventures |
The conscious mind of modern humans may be quelled by the luxuries we afford ourselves, but is it concerning that our efforts to preserve nature don't measure up to tip the scales of anthropogenic induced climate change? In the past century environmentalists have vocalized the need to minimize o ... more |
| Turbulent: A Golf Game |
| posted in Sports, Fitness, and Nutrition |
Golf is a game of grown men (and women!) hitting little balls big distances. A lot of people drink, curse and throw their clubs and this is called golf, too. Perhaps you're like your humble author and try as you might you can never get that perfect golf drive down every time. (Full disclosure: I ... more |
| Waterless Toilets- For Droughted Areas |
| By ds in Sustainable Engineering |
Has anyone heard of the Contest that involves engineering a different type of toilet that uses no water yet is sanitary and easy to use.? Its only been going on for a couple of months. I was thinking making a" prototype" miniature garbage truck that grinds like a garbage disposal only without using ... more |
| 2.4 kV 450 kW Motor Current Fluctuation Problem. |
| By zaheer khan in Electrical Engineering |
We are experiencing problem of current fluctuation for one of Medium Voltage Motor 450 kW ,2.4 kV,142 A.Normal running amperes of motor are 90-100 A.Presently the motor current fluctuate between 46-157 A.Motor No Load Current is 45 A.Note that the motor is driving a large DAP product dryer having hy ... more |
| "Star Destroyer" Neutrino Beam Weapons ? |
| By Widdekind in General Discussion |
------- An anti-neutrino can "rip a positive charge" from a proton, becoming an anti-electron, and leaving behind a neutron: !v + p ---> !e + n Therefore, an intense beam of anti-neutrinos could convert immense amounts of protons, to neutrons, inside stars. Those neutrons would then readil ...more |
| The Stars Are Out Tonite |
| By Doorman in CR4 Feedback |
Thread rating. Easy and quick to do. I seldom have done so, and most of the CR4 community seldom does so. At this writing 16 of the latest 100 threads in General are rated, 13 of the last 100 in Electrical Engineering, and only 6 of the latest 100 in Automotive. Do you bother to rate the threads? ... more |
| Design for Convenience: A Car Battery That Does Not Drain |
| By iyerkumar in General Discussion |
So I left the inside lights on last night in my van and now the darn battery is drained out. This is not the first time I have done it.. Why cant they have a battery power sensor that turns off the battery when it reaches a power level to save enough for a car start? This way if you left your ligh ... more |
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