I make human powered machines for offgrid living and have been getting ready to start on a human powered fridge. The idea is to use a deep freezer and replace the compressor with an automotive one, and connect the shaft to pedals (might require two riders). 1) Are the freon types compatible? 2) Are the pressures compatible, or the compressor modify-able? 3) Due to the surplus power, would like to charge up a large pressure tank of coolant to circulate and cool the system after riding for say 5 minutes. Any thoughts smart guys/gals? thanks for any insights into this!