AI6YR Ben1d ago
66F indoors, 86.4F outdoors. Able to open the windows last night to bank some cool air before today's scorching. Will have to see how well that works through the rest of the heatwave this week. #heatwave #CAwx #VenturaCounty
Show threadpolo1d ago
@ai6yr you may find this intriguing. Wouldn’t be surprised if you’ve already seen it!
https://youtu.be/s-41UF02vrU
Turning a $150 AC Into a Super-Efficient Geothermal Unit!

YouTube
Show threadAI6YR Ben1d ago
@gobag Too long for me to find it, but what did he fill his geothermal tubing with? (water? other liquid?)
Show threadpolo
@ai6yr the working fluid is water circulating to transport heat from the AC to the ground - 30:06
Backfill around the tubing is a geothermal grout mixture
• Water (50%)
• Sand (40%)
• Bentonite (10%) - 44:15
• Graphite: he adds graphite powder and flakes at 3% (each) to enhance thermal conductivity and reduce viscosity - 47:01
Mar 16 at 8:24pmWeb
Show threadpolo1d ago

@ai6yr I just remembered this video about PCM’s. it would be fascinating to see what happened using this phase change material instead of the muddy mixture in the AC video

https://youtu.be/Nqxjfp4Gi0k
Needlessly complex? Probably. Super fun science experiment? Definitely. Great info for emergency scenarios either way

DIY Supermaterial Could Save You From Heatstroke: Salt based PCMs

YouTube