Heat storage in sand

[GuyGadeboisTheBack]

Well then, isn’t there little Jesus in your crib?

[ojal]

How difficult would it be to recover the heat stored in a mass of sand? Wouldn't a relatively simple exchanger make it possible to carry out this operation?

It all depends on the intended use of heat? But you were talking about 500° storage temperature, that starts to complicate things a little.

I may be going a little too hard with 500°C, this remains to be defined, what particular constraint do you see for temperatures like those I am talking about of the order of 500°C?
Thank you

[phil59]

Recover heat, but from where?

At one time, I told myself that next to the boiler wood stove, I would make a box, filled with sand, with a coil branching off the stove....
Just to have a heat reserve.... but I have a 500L buffer tank, better suited to distributing heat throughout the house, to the radiators.

To be seen according to the volumes, and what we want to do in recovery.

[sicetaitsimple]

How difficult would it be to recover the heat stored in a mass of sand? Wouldn't a relatively simple exchanger make it possible to carry out this operation?

It all depends on the intended use of heat? But you were talking about 500° storage temperature, that starts to complicate things a little.

I may be going a little too hard with 500°C, this remains to be defined, what particular constraint do you see for temperatures like those I am talking about of the order of 500°C?
Thank you

Materials, constraints, deformations, difficulty regulating an outlet temperature.... But what would the final use be?

[ojal]

Recover heat, but from where?

As I said, the heat supply can be done with electrical resistances powered for example by solar panels, but we could imagine other energy inputs depending on the projects.

[Macro]

Well then, isn’t there little Jesus in your crib?

This gives photos prohibited for under 18s, the stories of Jesus in the nursery at home...

[ojal]

It all depends on the intended use of heat? But you were talking about 500° storage temperature, that starts to complicate things a little.

I may be going a little too hard with 500°C, this remains to be defined, what particular constraint do you see for temperatures like those I am talking about of the order of 500°C?
Thank you

Materials, constraints, deformations, difficulty regulating an outlet temperature.... But what would the final use be?

I may be underestimating the difficulties of working with such high temperatures of around 500°C...? At a very basic first approach, I don't see any particular difficulty?
The final use can be multiple depending on the projects, but there is always a use in being able to recover stored heat.
A priori it would not be wise to convert back to electricity because the yields would then be very poor...

[sicetaitsimple]

[but there is always a use in being able to recover stored heat.

Yes, but if you don't have a precise objective it is impossible to define what will come close to an "optimum".
500° is certainly stupid if the objective is to provide heating, for example

[ojal]

[but there is always a use in being able to recover stored heat.

Yes, but if you don't have a precise objective it is impossible to define what will come close to an "optimum".
500° is certainly stupid if the objective is to provide heating, for example

A simple application would be to use this type of storage for individual homes.
Solar panels would provide electricity to heat the mass of sand.
Then the heat could be recovered for the house's domestic hot water and heating needs in winter.
More generally, the discussion can focus on the interest of using sand to store energy whatever the applications.
One of the advantages of sand is that we have to work on things that seem quite low-tech to me and therefore "relatively easy" to implement and inexpensive...

[sicetaitsimple]

500° is certainly stupid if the objective is to provide heating, for example

A simple application would be to use this type of storage for individual homes.
Solar panels would provide electricity to heat the mass of sand.
Then the heat could be recovered for the house's domestic hot water and heating needs in winter.
More generally, the discussion can focus on the interest of using sand to store energy whatever the applications.
One of the advantages of sand is that we have to work on things that seem quite low-tech to me and therefore "relatively easy" to implement and inexpensive...

Certainly, the sand itself is "low tech". But it is the complete system that must be appreciated (or not) as such.