4 ms·
I do ice in the summer (this is mentioned in the article). Great for when you have warm feet in bed. It works longer than the hot bottles because of the phase c
by BenoitEssiambre 5y ago
I do ice in the summer (this is mentioned in the article). Great for when you have warm feet in bed. It works longer than the hot bottles because of the phase change which adds the equivalent of a 60 to 70 Celsius energy absorption.
I think you could do the same with wax for the hot version. Hot wax would last longer than hot water because of the phase change. I assume this is not commercially available because of the dangers of heating wax which should be done in a hot water bath. Some people would inevitably ignore the instructions and burn down their house.
Edit after a bit of research: Maybe the lesser heat capacity of wax offsets the benefits of the phase change.
- nickparker 5y agoWater also has an almost uniquely large enthalpy of melting. EG paraffin freezing releases 1/3 as much heat as water
- GuB-42 5y agoBesides heat capacity, the advantage of liquid hot wax is that it stays at around 50°C during the entire melting process, which is a good temperature for something that keeps you warm. Instead of staying at an ideal temperature, water will gradually cool down.
- YXNjaGVyZWdlbgo 5y agoI use a cooling pad [0] for animals and it's amazing no electricity just convection. [0] https://www.amazon.com/Chillz-Cooling-Dogs-Large-Size/dp/B007JT4P88/ https://www.amazon.com/Chillz-Cooling-Dogs-Large-Size/dp/B00...