Presently water (treated) is extensively used worldwide in thermal power generation .The three factors mainly in favor of water being 1) abundantly available in nature 2) can be converted in all three forms viz.liquid,gaseous, & solid. 3)heat can be stored & released as per Universal gas equation.i.e. P V = m R T. However in continuing development on fronts of Heat Transfer; there might be other fluids which may have better heat transfer properties which when used instead of water may benefit in achieving higher electrical generation for the same quantity of fluid. Also it may reduce cost of water treatment plant,auxiliary consumption, blow downs etc etc. Request to enlighten on this subject😲