The conversion of heat into current can be obtained by a process with two stages. In the first one, the heat is used for distilling a solution and obtaining two flows with different concentrations. In the second stage, the two flows are sent to an electrochemical cell that produces current by...

A small steam expander reciprocating engine is proposed for the conversion and utilization of low-grade heat resources of different nature, such as geothermal, solar, and recovery of waste heat. The engine, still to be developed for production, should be able to work with small flow rates and...

With the aim of improving the performance of Stirling engines for applications with relatively low maximum temperatures (150 °C–300 °C), working fluids that have noticeable real gas effects have been considered.