Home Photovoltaic System Payback

I saw this exchange between a couple of members

CaptMoosie:

3). Going Green in other ways is a huge hobby of mine! Installation of a 7.56 Kw Solar PV system on our house roof to help us get nearly off the electric grid.....it'll be installed sometime this next month by the S

Wind fences

Looking for a rough estimate of what wind fences cost? Thinking about the fabric style wind fences; like around ball diamond and industrial areas. 20-40ft high, 100-200ft long.

Cool Cars: The 1929 Model A Snowbird

Model A and Model T snowmobiles are a perennial favorite around these parts, so we naturally investigated this particular 1929 Model A Snowbird that recently appeared on Hemmings.com, being offered out of St. Louis for $69,500. From the seller's description:

"This 1929 Ford Model A Tudor

fire figting

i want to have some information about how to supervise aproject of fire fighting in big hanger for air crafts and is it allowed to have the foam blader tank in out side with no room to cover it and how can i test the whole system and eccepting the final project from contractor stating of water tank

Wassup with lead solder anyhow?

I had the chore yesterday of prepping some equipment for use in an electronics lab. There were about two dozen breadboard like arrangments of resistors and capacitors, most of which had been put aside and marked "problems" or similar. When I flipped the first one open, I saw the problem right away.

How to Detect Oil Contamination in Water

We have a lube oil cooler where the hot lube oil is flowing at a pressure of about 28 barg on the shell side.The tube side contains water at around 4 barg.

We are interested in detecting oil leakage in water when the tube has a small leak or it ruptures.

The water is a closed loop

Are Engines the Future of Solar Power?

From Scientific American:

Nearly 200 years after their invention, and decades after first being proposed as a method of harnessing solar energy, 60 sun-powered Stirling engines are about to begin generating electricity outside Phoenix, Ariz., for the first time. Such engines, which

NASA Plans Backup Astronaut Escape System

From Discovery News - Top Stories:

Determined never to repeat the tragic Challenger launch accident, NASA not only is developing a crew escape system for the space shuttles' replacements; the space agency also has a backup system that could fly astronauts to safety in case of an em