
1) Geothermal energy
Found on
https://www.crosswordclues.com/clue/binary-cycle

The combination of two power plant turbine cycles utilizing two different working fluids for power production. The waste heat from the first turbine cycle provides the heat energy for the operation of the second turbine, thus providing higher overall system efficiencies. See also binary cycle geothe...
Found on
http://www.daviddarling.info/encyclopedia/B/AE_binary_cycle.html

Combination of two power plant turbine cycles utilizing two different working fluids for power production. The waste heat from the first turbine cycle provides the heat energy for the operation of the second turbine, thus providing higher overall system efficiencies.
Found on
https://www.encyclo.co.uk/local/22819

Binary geothermal systems that use extracted hot water or steam to heat a secondary fluid, which then drives a power turbine.
Found on
https://www.encyclo.co.uk/local/22831
No exact match found.