I'm dropping a whole wiki tonight with the design of my offgrid zero-battery solar powered fridge.
Thought about peanut oil? M.p. 3C, density 0.91 g/ml (Sure, it's less than water, but not terrible.)
Oil melt point is variable
Oils are made up of different fatty acids that have different melt points
Plant variety & growing conditions effect the proportions of different FAs
Methods used to extract the oil also effects the amount of different FAs
Oils are sometimes further processed to give desired properties
Eg. rape seed cooking oil is winterized (cold filtered) to take out any FAs that would solidify in a fridge as cloudy oil in a fridge is apparently disturbing
social.coop is a cooperatively-run corner of the Fediverse. The instance is democratically governed by its members, who generally share an interest in the co-op model, but topics of discussion range widely.
Our instance is supported by sliding scale contributions of $1-10/mo made via Open Collective. You must have an active Open Collective account to apply for membership; you may set one up here