It's in da' sand ...

[ToughButterCup]

Was the little boy right, but correct about the wrong thing?

 

 

Those Finns, frightfully clever lot eh?

https://www.bbc.com/news/science-environment-61996520

 

Got any spare builders sand lads? (OK - and lasses - @canalsiderenovation )

 

[ProDave]

Is it just me, or should the term "battery" be restricted just to something that stores or produces electricity?

 

This thing described is a THERMAL STORE.  Yes, a big night storage heater.  It may be heated by electric resistance heating, but the stored energy is taken out as hot water not as electricity, so I believe the term "battery" is wrong for this.

[JohnMo]

At 500 degC you can make high quality steam and drive a steam turbine generator - electricity.

[SteamyTea]

27 minutes ago, ProDave said:

Is it just me, or should the term "battery" be restricted just to something that stores or produces electricity?

Artillery battery?

 

It is not the medium that the energy is stored in (I used granite chips for my dissertation), it is the insulation methods that is the interesting bit (I used polystyrene).

 

Sand has a conductivity of 0.25 W/m.K and a SHC of 830 kJ/kg.K

Granite has a conductivity of 3.2 W/m.K and a SHC of 790 kJ/kg.K

Polystyrene has a conductivity of 0.12 W/m.K and a SHC of 1100 kJ/kg.K

 

 

To quote from the BBC article.

 

"One of the big challenges now is whether the technology can be scaled up to really make a difference - and will the developers be able to use it to get electricity out as well as heat?"

 

Too right.

Edited July 5, 2022 by SteamyTea

[jack]

39 minutes ago, ProDave said:

Is it just me, or should the term "battery" be restricted just to something that stores or produces electricity?

 

I doubt you're the only one who thinks this, but I disagree. "Battery" has a long history of use in relation to thermal storage.

 

Chemical storage devices of the type you're referring to are only called batteries because they're formed from a battery of cells.

[Pocster]

Definitely a project for @Onoff 🙄🙄🙄🙄🙄🙄🙄🙄

[SteamyTea]

https://polarnightenergy.fi/

 

A website full of puff.

 

99% efficiency. Maybe during the first °C of storage.

 

I am surprised this kind of nonsense is reported. 

If it was possible to store any material at 500°C+ for any reasonable amount of time, then the "energy crisis" would be over.

[Onoff]

21 minutes ago, pocster said:

Definitely a project for @Onoff 🙄🙄🙄🙄🙄🙄🙄🙄

 

Old news, I proposed something similar using the "stays hot forever" McDonald's apple pie filling, some time ago. Again the multinationals made me an offer to keep the thing quite...or it might have been someone just suggested I keep quiet...

 

 

[Radian]

Oven baked tomatoes. You can get a scalded mouth eating those half an hour after they're served 🙄

[Onoff]

Microwaved croissants. They hold scalding steam for ages. Scars to prove it.

[SteamyTea]

Just now, Onoff said:

scalding steam

Latent heat of fusion.  It gives up many times the normal amount of stored energy.

 

Now, if only there was a cheap, easily available, material that could phase change at relatively low temperatures, say 100°C, and then could take extra energy up to say, 10 bar.  Could pipe that though an engine easily enough I would have thought.

[Pocster]

My pants . They hold (m/h)eat like you wouldn’t believe!

[ToughButterCup]

Made any jam recently?

ChristOnAbike, heated sugar holds onto heat longer than @pocster to walk-on-glass. 

Edited July 5, 2022 by ToughButterCup

[Pocster]

28 minutes ago, ToughButterCup said:

Made any jam recently?

Was that aimed at me ? . Jam in my pants …. Plenty of 👍😛

[canalsiderenovation]

On 05/07/2022 at 08:20, ToughButterCup said:

Got any spare builders sand lads? (OK - and lasses - @canalsiderenovation )

 

Nope but I have about 25+ tonnes of crushed concrete we did at the weekend . . .  and I fractured my finger!

 

 

 

 

[Simplysimon]

On 05/07/2022 at 08:55, ProDave said:

"battery" be restricted just to something that stores or produces electricity?

Voltaic pile, now battery pile. i can see who's going to 'pile' into this one......

[SteamyTea]

7 minutes ago, Simplysimon said:

Voltaic pile, now battery pile

Chalfont St Giles.

[Onoff]

47 minutes ago, canalsiderenovation said:

 

 

Stoned?

[ToughButterCup]

On 05/07/2022 at 17:18, pocster said:

Was that aimed at me ? 

 

I'm too polite to consider your withers ..... 

 

9 hours ago, Onoff said:

Stoned?

 

Naaaah, thats the Delivery Man. Poor lad.