Just a thought, but if the water "siting" was inside a sealed enclosure, only opened when necessary, would hydro be a better option? The size of the container to enclose a lake might be a bit sci-fi though...
What could be reasonable for bulk energy storage in fixed locations is good old lead batteries, since the lead is a common metal and fairly simple to recycle, and the technology is quite well understood. That is a bunch of reasons to consider a tecnology not right at the cutting edge.
I was thinking exactly the same issues... But wandered a little aroud the thermodynamics of it: any heating (self heating) would represent a form of looses (like heating from mechanical friction or self heating by eddy currents in transformer cores)... And heating looses would raise inefficiency. Measuring some NiMH and LiPo's batteries for my R/C model airplanes with a good intelligent charger, reveals batteries have quite different values between energy charged (In) vs. energy delivered (out), but I seldom see discussions on this inefficiency, and no thermal insulation is perfect. In some cases, even dedicating some energy to maintain cooler Battery temperatures by using extra fans (driven from the same battery) is advantageous, but costs more energy wasted to keep the battery from melting itself. [high power electrical powered model airplanes with several horsepower motors].
Exactly. Major problem there...evaporation and other water retention problems. Other issues come in the loss of power through the inefficient pumps and other electrical mechanisms. Not to mention the reconversion of the water back to electricity through turbines.
The battery cuts out a lot of the problems of other systems, cuts right to the chase, electrical power ready to go.
When you say "water displacement," Cabe, are you referring to pumped hydro? Pumped hydro -- pumping water up to a higher spot and then using it to spin a generator -- is still the most common form of grid storage by far, I believe.
I know many are making batteries for storage already, but as I said, cost is high. Especially compared to old methods like water displacement. I also read about freezing, momentum, and weight storage of energy. All of which seemed silly.
Perhaps when capacitors reach higher density of surface area, they could be used.
Yes, the known reserves of Antimony (Sb) are less than 2M tonnes. That may sound like a lot but antimony, like lead, is very heavy so those "40 foot containers" might contain as much 20 tonnes each. Worse yet, the huge percentage of antimony reserves are in China - which has recently shown a reluctance to expolit their rare-earths further than 2010 levels.
Truchard will be presented the award at the 2014 Golden Mousetrap Awards ceremony during the co-located events Pacific Design & Manufacturing, MD&M West, WestPack, PLASTEC West, Electronics West, ATX West, and AeroCon.
In a bid to boost the viability of lithium-based electric car batteries, a team at Lawrence Berkeley National Laboratory has developed a chemistry that could possibly double an EV’s driving range while cutting its battery cost in half.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.