There's a lot of water constantly moving through the municipal pipelines of most major cities. While the water itself is already destined for various uses, why not harness its flow to produce hydroelectric power? Well, that's exactly what Lucid Energy's LucidPipe Power System does, and Portland, Oregon has just become the latest city to adopt it.
LucidPipe simply replaces a stretch of existing gravity-fed conventional pipeline, that's used for transporting potable water. As the water flows through, it spins four 42-inch (107-cm) turbines, each one of which is hooked up to a generator on the outside of the pipe. The presence of the turbines reportedly doesn't slow the water's flow rate significantly, so there's virtually no impact on pipeline efficiency.
The 200-kW Portland system was privately financed by Harbourton Alternative Energy, and its installation was completed late last December. It's now undergoing reliability and efficiency testing, which includes checking that its sensors and smart control system are working properly. It's scheduled to begin full capacity power generation by March.
Once up and running, it's expected to generate an average of 1,100 megawatt hours of energy per year, which is enough to power approximately 150 homes. Over the next 20 years, it should also generate about US$2 million in energy sales to Portland General Electric, which Harbourton plans on sharing with the City of Portland and the Portland Water Bureau in order to offset operational costs. At the end of that period, the Portland Water Bureau will have the right to purchase the system outright, along with all the energy it produces.
For now, the new LucidPipe Power System is the only one in Portland. If it proves successful, however, others may follow. A previously-installed system has been providing power in Riverside, California since 2012.
If you like the basic idea behind the technology, there are smaller similar systems that can be installed within your own home. The Pluvia generates electricity from the flow of rainwater off of rooftops, while the H2O Power radio runs on electricity generated by the flow of shower water.
Source: Lucid Energy
Exactly. That's the only way these projects work. Just use the correct "green" buzzword and it's all good. It's like they know the general public isn't going to think critically or consider basic physics. You cannot, ever, get more energy out of a system than is put into it.
If you lower the water pressure along the chain, it will require MORE energy to bring it back to a usable level by the end user.
As with anything, follow the money.
"The 200-kW Portland system was privately financed by Harbourton Alternative Energy."
Second. Our water already has plenty of pressure. I take it you don't live in Portland, or you'd not be writing such comments?
I do somewhat agree that this could be a bad idea for taking energy out of the system. Apparently there is an excess there that has been built into the system that can be drawn off without harming the overall effectiveness. Until recently the leaks between the mountains and the city were fairly epic and the subject of quite a few photo shoots. Fixing those alone over the last few years would likely keep more pressure in the system then these use.
There are no buzzwords or pumps required here. Hydro-power is absolutely the cleanest form of energy. Essentially it uses only gravity power, nothing else.
Sure, you can't create more energy, but you CAN harness more energy out of system. Before, this energy was wasted in household taps blasting out water at high pressures. (not to mention the extra water per second).
Obviously someone studied basic physics, and thought critically.
Foiled...once the energy is removed, there is a pressure drop that does not come back. Apparently they can afford some drop. It would seem more efficient at intervals along the falling pipe, rather than at one point but the proximity to electric wires might have determined that.
It would never work on a non-gravity feed system to have a net gain.