Renewable Energy

Can we renew our energy, for example, the inverter needs DC voltage in order to convert to AC voltage. The question is can we recycle our energy to produce a reliable power supply system that we can be used for domestic and Industrial applications for both DC and AC voltages.

If possible

Will work for food :)

Dear All, Please guide me to right direction. I'm an undergraduate student (4th year) of control systems department of Aviation University, Ukraine. My problem is I have not hands on experience. My school can not provide me a practical training. Therefore I have to do it myself. Aviati

Sizing Motor Pump

Anybody could help me..? What size of motor pump should we use in an elevation of 200mtrs?. The available power supply is only 230V, 60HZ, single phase. Is it advisable to use VFD so that we could use 3phase motor.? Or we could just use single phase motor.? Please consider the Cost.Thanks a lot.

interview questions

m an electrical engineer with 3 yrs experience & having interview in a reputed mnc for commissioning purpose so can u plz suggest me some interview questions regardig this ? need ur help..

Information on Aluminum Alloy 6082

Hi all,

I am using aluminum alloy 6082 for one of my project,it includes heating the aluminum plate(alloy 6082) to around 200 degree centigrade.I want to know is there any effect on the plate if i heat the plate continuosly?

awaiting for your valuable replies.

Thanks

Project Management

Dear Professionals,

Iam recently moved into project function,where i will be implementing multiple mech and civil projects this calender year.

Pls let me know where i can get useful Excel sheets for implementation and monitoring of engineering projects.

Thanks

Ramamurthy

Dough Moulding

Dear Sir,

I am working on dough moulding process,and I wish if anyone can suggest best formulation from the point of view of strength. I am using polyester resin, catalyst, calcium carbonate, and glass fibers(chopped)

Should I put anything else beside these items? also what should

New-Geothermal Heat Pump

See old thread under geothermal heat pump

I think I made a mistake in the use of the word over unity and ever one went of on a tangent to what I had in mind.

What I was trying to say was; If the combination of the electric energy driving the compressor and the heat energy from the

COSMOSwork 2006

Hello!

I have in my pc the SolidWorks 2006 sp0.0 and there is avaiable de COSMOSXpress!

But I need the COSMOSWork, its more complete!

In the solidwork file I have 2 folders, the COSMOS folder and COSMOSXpress forder. How I do to run COSMOSwork insted COSMOSXpress?

Tanks

Fault Current Gone Wrong

I am working on a design with (5) 2500kW generators and with the Reactances I get Isc 3p 140kAIC and Isc slg 150kAIC. Is there anyway to limit this fault current. I know a neutral grounding system will limit the slg but what about a 3p fault, is there anything like that out there? My client doesn

How to Be the World's Greatest ISP

We're not always aware of it here in the USA, but there are many ISPs out there in the world who do things quite differently than what we're used to. Some of these ISPs ideas are even really good. Ars surveys the global ISP landscape and paints a picture of what a dream ISP might look like.

Commissioning test for generator relays

The relay has following funtions: distance, v/hz, synch check, auto synchronism, undervotlage, reverse/forward power, loss of field, negative sequence, overcurrent, time over current, over voltage, stator ground fault, out of step, frequency relay, current/ground differntial.

Should we write in

Figuring Flow Liquid

Hello All, Newby, am I in the right spot?

I am prototyping a faucet and need some help in figuring pressure loss through a hole in a piston so that i can determine pressures for springs, piston diameters etc.

Anyone smart in that department??