Energy Harvested From Evaporation Could Power 70% Of The U.S.

That depends on the area as well as the lux. I assume you aren't understanding that this spec isn't saying what you want to know. The area dependency I get. I suppose the dependency on the lux means it depends on how long you've let it sit in the sun. Lux is the light being given off by the material. That is what I think you want to know. The mcd tells you how bright it will appear given some lux value.

The question is not so much what does this spec mean, but why is it being used?

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Oh, it's the doping that gives the light and not every atom/molecule/unit cell. Never mind.

George H.

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Thanks I guess I was reading the units wrong. I get 190 mcd out (of some unknown size.) if I blast it with 1 lux/m^2 for 10 minutes.

No! sorry, I get 190 mcd/m^2 if I blast it with 1 lux for 10 minutes.

That at least makes sense.

George H.

I think it's kyrpton (noble gas), not Krypton (bane of Superman).

No, the super-killer is "Kryptonite". But yes it's not the filament, rather the envelope filler (aka "Halogen" light).

No, they are both krypton. One is the element, the other the planet.

If you can't work out that thermal efficiency is a limiting issue with solarthermal and electrical efficiency is a limiting issue with solar PV then you're an unconstructive trolling time waster. As you ever are.

NT

Quarter inch jack.

I don't know the dates for the Edison plug, ES, BC & filament striplight lampholders.

NT

Solar technologies where it's relevant, such as solarthermal towers using molten salt with ground based mirrors.

NT

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he grid can use 'technology' to overcome these physical realities?

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d it with technology.

cells. Sunlight is free (though there isn't enough of it) and "thermal effi ciency" simply isn't a useful measure of anything remotely interesting.

least useful response ever.

lar thermal and electrical efficiency is a limiting issue with solar PV the n you're an unconstructive trolling time waster. As you ever are.

Another moronic response, from a dimbo who thinks that labelling a critical response as a "troll" is worth the effort.

"Thermal efficiency" may be a useful measure of performance on a thermal so lar plant, but I was explicitly talking about solar photovoltaic (PV) cells , and even with thermal solar it isn't by any means the whole story. You wo uldn't be going for thermal solar if you weren't planning using stored sola r energy as a dispatchable source, which means that you plan on wasting som e of that stored energy by letting the thermal mass cool off a bit before y ou exploited it.

Efficiency isn't the problem with solar (or wind) energy, rather storage.

Just tell Slowman to put it where the sun don't shine. Ignore the moron.

There are multiple problems. Diffuseness of the energy is one, efficiency is another, storage is another, and ultimately it comes down to cost per output.

he sure is.

NT

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the grid can use 'technology' to overcome these physical realities?

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und it with technology.

r cells. Sunlight is free (though there isn't enough of it) and "thermal ef ficiency" simply isn't a useful measure of anything remotely interesting.

e least useful response ever.

solar thermal and electrical efficiency is a limiting issue with solar PV t hen you're an unconstructive trolling time waster. As you ever are.

al response as a "troll" is worth the effort.

solar plant, but I was explicitly talking about solar photovoltaic (PV) cel ls, and even with thermal solar it isn't by any means the whole story. You wouldn't be going for thermal solar if you weren't planning using stored so lar energy as a dispatchable source, which means that you plan on wasting s ome of that stored energy by letting the thermal mass cool off a bit before you exploited it.

You might have been talking about solar pv, but when I made my thermal comm ent I very obviously was not. Only you were unable to grasp the totally obv ious. You really are a time wasting idiot. Plonk.

The diffuse aspect is solvable. But yes, The final problem, cost, is the killer.

the world would love to hear how

NT

So why are you starting another conversation rather than sticking to the issue we started with? The thermal efficiency of a device is important, but the thermal efficiency of the original devices we were talking about is not the limiting aspect. They are large for the energy they produce compared to other types of motors. That is not the same thing as thermal efficiency.

Photo voltaic Solar is not "thermally" inefficient by any useful measure. What would you be comparing it to? Thermal solar power is not thermally inefficient by any useful measure. What are you comparing it to?

Cells covering every house. It doesn't do drek for the storage problem, though. That one will break the bank.

so not actually doable. The world is so disappointed.

In the far future that might happen, if solar pv becomes cheap in the extreme.

NT