Inter-seasonal solar thermal energy storage

[Christophe]

I put here this old CSTB doc from 2005:

Use of Phase Change Materials (PCM) in passive air conditioning and between-season heating

Storage_MCP_interseason.pdf

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2005, it's been 17 years... studies and calculations are good, but concretely, where are we with the use of phase change materials for inter-seasonal storage? Given the energy context, it's time to get started... right?

See also:
https://cordis.europa.eu/project/id/622883/reporting/fr

[Christophe]

And one from...1988!!

thermal storage.pdf

(242.32 KB) Downloaded times 189

[Remundo]

the phase change material has 2 advantages
1) require less volume for the same stored heat
2) stabilize the temperature throughout the time it changes phase.

I don't have any personal experience on this subject to share.

but that must be thought out from the construction of a house, in general it is a pit under the house which will contain the materials with thermal inertia, and then piles of pipes to circulate the coolant. Not to mention the sensors on the roof!

So "get started", for those who already have a house, it's dead. Even worse in buildings.

For those who build, well, it's a bit of an adventure to get involved in this. What to wear, how to size it...?

From what I see around me, we build on one level with a cement slab that overlooks a stupid crawl space on the ground floor and a thin plank frame... And then we put a heat pump at the Q of the wall. And There you go.

[Christophe]

Not necessarily impossible, it depends on what type of storage you want...in the walls this could be done during a thermal renovation with large encapsulated paraffin panels...like 2 m * 1 m * 0.2 m...

Volume: 0.4 m3 for 2m²... If there is 200 m² to treat, 40 m3 of PCM is needed.

So the concern is the price of the volumes because even with the cheapest paraffin, these 40 m3 that's thousands of euros... and I'm talking about raw paraffin without encapsulation...

Otherwise there is palm oil: solar-thermal / store-of-the-thermal-energy-with-from-oil-palm-of-t7421.html

ps: look at the 2 documents, they are quite synthetic...

[A.D. 44]

Hello,

There is no need to embark on the use of phase change materials...

The basement of buildings is a good way to store the summer surplus. Via air exchangers or a crown of buried multilayer.

[Christophe]

There is a similar topic here: solar-thermal / inter-seasonal-storage-of-solar-thermal-t14320.html