Stirling engines have been around since the nineteenth century. They are an elegantly simple way of generating power using temperature differentials, but nobody ever found a way to make them efficient enough for wide scale use. Now a UK company has developed a heat pump system based on the principles of the Stirling Engine, but with some ingenious adaptations, using no HFC refrigeration gases and with a 30% saving in energy costs compared to existing systems.
Fluid Mechanics Website
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