Derek 2.0

Indeed.......and how many former (Bill) Clinton and Obama aides will work on Hillary's campaign?

It appears Singapore will be the next nation to select the F-35....

Exactly, and is why in ones home, if every fixture is on, pressure will noticeably decrease.......

Well clearly a gravity system (be it potable or drainage) is pressurized so much as atmospheric+, but yes, a cost-benefit analysis would be a must........For example, such a system used for storm water runoff in the North shore, Westwood or Heritage Mountain could be viable in the fall/winter/spring months, but how muchy to install and maintain???

Yet, from the article within the OP: Furthermore: So the system can't be used in pressurized pipelines, but gravity fed systems, as clearly outlined already by myself and several others, fore decreasing pressure to generate energy, in a system that requires an energy source (to power pumps and compressors) is self defeating........ Now, with a large storm sewer, or gravity fed aqueducts (like what supplies Southern California) as mentioned by Mighty AC, the design might have merit, only though if you could determine if the cost of retrofitting old systems would result in viable returns in energy production.

A prank from engineering students from the University? UBC engineering students are always good for one every year....

If you're looking down the barrel, a bolt or break action is just as lethal........

Again, you need to reread the OP or Google fluid mechanics......

In the United States, not so, one just needs to live in a class three state and have a tax stamp......In Canada, a 12.3 license.

Ahh, so you'd just install further electrical controls in the system, and I assume a monitoring station that requires power 24/7, regardless as to if the turbine is functioning or not......and you'd just "shut down" the turbine during peak usage times, the times said turbine would generate the most potential power? But of course, even if you "shut down" the turbine, water still must pass through it, still creating a pressure loss throughout the system, due to a disruption in flow from a turbine that isn't generating power...........makes perfect sense in an bass aackwards type of way.......

How do we know that? A ~ 5 psi drop in water pressure within an already stressed waterworks, and further compounded at higher elevations, can be the difference between the fire department needing additional pumper trucks to pump water from hydrants, to other pumper trucks fighting a fire.......

Yeah, they do.......reread the article in the OP and Bonam's post

Yeah, and the pressure drops even further as it goes through your freewheeling generators turbines.......like I said above

And when thousands of other showers are in use, system wide, the pressure will either drop or require additional energy (in the form of pumps and compressors) to make up for the drop in pressure.......and you want to generate energy, by using more energy (pumps/compressors) or accept a further drop in system pressure, which further strains the entire system.........So in effect, you'll create some energy by restricting water flow throughout your system at peak times.......

I thought you said you understood the concept When I'm not using my shower, both pressure and flow become static.......hence your wheel won't spin to make power.

You're describing a turbine, I'm asking you to describe this post: Explain how said "pressure differential" provides for demand changes........

By all means explain how your magical "pressure differential" works in a domestic plumbing system...

Define "common".......how would such system work in a (near) flat elevation? In cases such as those you highlighted, or a gravity storm sewer, such system may have merit, but why not just build a hydro dam as mentioned?

Now you're babbling nonsense.......if you use every fixture within your home there is a significant drop in your domestic system......likewise if there is high demand on an entire city water system, pressure also is reduced citywide.

So you do understand the concept, it didn't seem like that when you stated: Now do you understand that as more water is used, system wide pressure is also reduced, and would be reduced even further (or require additional energy to maintain pressure) when the electrical turbine is in use?

You're missing the concept.......when less water is used, less power is generated, at such a time pressure increases system wide.

It doesn't work like that, during peak usage of the water system, as usage is increased, pressure is either reduced throughout the system (decreasing volume/flow rates) or requires additional pumps/compressors within the system to keep up with demand.....Once you start reducing any built in excess pressure, you not only limit future growth, but the ability to respond to one-off stresses to the system, like burst water lines or the need to fight fires....As Tim says, there is no free lunch.

This is true, but the pressure loss associated with the turbine could be mitigated by installing said turbine on a bypass off the mainline, followed by an additional booster pump on said bypass prior to returning to the mainline. Of course, to prevent this from becoming a self-licking ice cream cone, the booster pump would need less of an electrical requirement then what is generated by the turbine……..

Indeed, hence biting the hand that feeds........

So does that mean said nations will no longer require annual US military aide? And could challenge Israel? You mean like a united Arab force did in 1948, 1967 and 1973?