Discussion on:

Startup Rentricity recovers energy from water systems

Another good idea for the use of waste energy. Assuming minimal maintenance costs and an equipment lifetime of not less than 10 years, the device will pay for itself.

I'm sure there are many other sources of waste energy that can be recovered. Too bad only electric cars and trucks can take advantage of regenerative braking.

I agree with b....

With the dollar amounts given we are looking at 8 years for the project to pay for its self if there are zero maintence costs.

How long is the hardware expected to last?

With even modest annual maintenance costs you could be looking at a break even in 20 years.

Will it last that long?

Is it worth doing?

DAVID - paragraph #3 -
"Flow-to-Wire recovers energy by mimicking the pressure reduction valves (PRVs) that are used to relief excess pressure in water supply systems. Excess energy is recovered rather than being dissipated as heat."
should be "relieve" .
Unfortunately, I agree with Hates Idiots - I don't believe the cost of the infrastructure will be recoverable by the electricity produced.

@JTF243 thanks