Initial investigations to see if we are barking up the wrong tree.

Assumptions

• SAT density: 1.46g/CM3
• SAT latent heat of fusion: 0.073Kwh/Kg (264kJ/KG low end 289KJ/KG high end)
• 60% SAT to water solution (volume?)
• ABS thermal conductivity: 0.1 W/m/K (SAT thermal conductivity not modeled ABS wall only)
• SAT temp 58C

First test pipe ( to be built)

• 43mm OD 1.5mm wall ABS 1m long
• 4.16Kg sodium acetate 1.91Kg water 6.07Kg total
• 0.30Kwh
• heat output @18C room: 257w
• heat output @20C room: 244w
• estimated 1h runtime

Full size pipe

• 75mm OD 65mm ID 5mm wall ABS 1m long
• 11.55Kg SAT, 5.31Kg water, 16.86 total
• 0.84Kwh
• heat output @20 room: 166w
• heat output @ 18 room: 175w
• estimated 4h runtime