Electronics > Power/Renewable Energy/EV's

Lightsail Energy Storage Fail

<< < (3/3)

roffvald:

--- Quote from: LabSpokane on June 19, 2016, 02:23:26 pm ---
--- Quote from: roffvald on June 19, 2016, 01:51:56 pm ---How would this type of storage be better than what some nations are currently doing? Pumping up water reservoirs when electricity is cheap, then running it out when there is a shortage.

--- End quote ---

The issue is location. The geography has to work for pumped water storage. If you have a place to do it, pumped storage is the best game in town with something on the order of 80-85% round trip efficiency. This excludes evaporation losses in the reservoir.

--- End quote ---

Oh definately I can see that, but it should be possible to build a system on flat land, there's some serious knowledge out there on massive concrete structures(Look up CONDEEP oil platforms).

edavid:

--- Quote from: roffvald on June 19, 2016, 03:26:14 pm ---Oh definately I can see that, but it should be possible to build a system on flat land, there's some serious knowledge out there on massive concrete structures(Look up CONDEEP oil platforms).

--- End quote ---

No, it's not really practical.  Here's some analysis:

http://physics.ucsd.edu/do-the-math/2011/11/pump-up-the-storage/

roffvald:

--- Quote from: edavid on June 19, 2016, 03:42:55 pm ---
--- Quote from: roffvald on June 19, 2016, 03:26:14 pm ---Oh definately I can see that, but it should be possible to build a system on flat land, there's some serious knowledge out there on massive concrete structures(Look up CONDEEP oil platforms).

--- End quote ---

No, it's not really practical.  Here's some analysis:

http://physics.ucsd.edu/do-the-math/2011/11/pump-up-the-storage/

--- End quote ---

That's the needs for the US, not everyone lives there. But I see your point, only really feasible as a "addon" solution in most cases.  However it's working beautifully here in Norway, and in return we get some of the cheapest and cleanest energy ;)

mtdoc:

--- Quote from: EEVblog on May 27, 2016, 09:42:12 am ---Sinking deeper into self-parody, the company also offered kombucha on tap (it tasted "terrible," according to one engineer) and also apparently had an employee whose role included putting together the Ikea furniture (news flash: used furniture) and shopping for the choicest blueberries and vine-ripened tomatoes at the Berkeley Bowl.

--- End quote ---

Ha Ha!  Classic. Kombucha, Ikea and the Berkeley Bowl.  In their defense the Berkeley Bowl does have a really big produce section... ::)

LabSpokane:

--- Quote from: roffvald on June 19, 2016, 04:15:34 pm ---
--- Quote from: edavid on June 19, 2016, 03:42:55 pm ---
--- Quote from: roffvald on June 19, 2016, 03:26:14 pm ---Oh definately I can see that, but it should be possible to build a system on flat land, there's some serious knowledge out there on massive concrete structures(Look up CONDEEP oil platforms).

--- End quote ---

No, it's not really practical.  Here's some analysis:

http://physics.ucsd.edu/do-the-math/2011/11/pump-up-the-storage/

--- End quote ---

That's the needs for the US, not everyone lives there. But I see your point, only really feasible as a "addon" solution in most cases.  However it's working beautifully here in Norway, and in return we get some of the cheapest and cleanest energy ;)

--- End quote ---

The potential energy in a unit volume of water is defined by it's height above the pump/turbine that it will spin.  This is why very efficient dams are tall.  It's not an American thing, it's a physics thing. 

E = mgh

This isn't to say pumped storage can't be done at lower height differentials, it just involves pumping much larger volumes of water into much larger areas.  This begets higher losses to pumping losses, evaporation, etc.

Navigation

[0] Message Index

[*] Previous page

There was an error while thanking
Thanking...
Go to full version