You know those thing called blood banks, well they have some for specifically cells, which are called cell banks. Essentially they preserve the cells and stop their growth for later use. Now all this is done with electricity, but in my stories setting electricity cannot be used to accomplish this. But there is one power source that is available: steam.
How could steam power be used instead of electricity to operate a stem cell bank (any room size, any insulation)?
- needs to freeze the cells at a rate of -1 to -3 degrees Celsius per minute
- sustain temperatures of -196 degrees Celsius
- thaw out the cells at a temperature of 37 °C