PEX: Difference between revisions
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*Large bed of sand to store heat, or even pulverized, dry soil - is sufficient to store large amounts of heat. Even for seasonal storage. | *Large bed of sand to store heat, or even pulverized, dry soil - is sufficient to store large amounts of heat. Even for seasonal storage. | ||
*It is easier than having to maintain a large pool of water. | *It is easier than having to maintain a large pool of water. | ||
*Specific heat of water - 1 cal/gram/C vs rock at 0.2 cal/gram/C. Need 5x rock to water. But [[Void Ratio]] may be 50%. | *Specific heat of water - 1 cal/gram/C vs rock at 0.2 cal/gram/C. Need 5x rock to water. But [[Void Ratio]] may be 50%, so one would need 10x the sand compared to water. | ||
*Insulated basement with sand would be ideal. | |||
Revision as of 21:36, 31 July 2021
Sourcing
- 1/2", 600' for $120. [1]
Calculations
- Internal volume - 6 gal [2]. 1 gal per 100 feet.
Lessons Learned
- Large bed of sand to store heat, or even pulverized, dry soil - is sufficient to store large amounts of heat. Even for seasonal storage.
- It is easier than having to maintain a large pool of water.
- Specific heat of water - 1 cal/gram/C vs rock at 0.2 cal/gram/C. Need 5x rock to water. But Void Ratio may be 50%, so one would need 10x the sand compared to water.
- Insulated basement with sand would be ideal.