A Rankine cycle system comprising: (a) a first closed loop thermal energy recovery cycle comprising a first working fluid stream; (b) a second closed loop thermal energy recovery cycle comprising a second working fluid stream; (c) a first heat exchanger configured to transfer heat from the first working fluid stream to the second working fluid stream; (d) a second heat exchanger configured to transfer heat from the second working fluid stream to the first working fluid stream; wherein the first closed loop thermal energy recovery cycle further comprises: (i) a first heater configured to transfer heat from a first waste heat-containing stream to the first working fluid stream to produce a vaporized first working fluid stream and a second waste heat-containing stream; (ii) a first expander configured to receive the vaporized first working fluid stream and to produce therefrom mechanical energy and an expanded first working fluid stream; (iii) a first condenser configured to cool a heat depleted first working fluid stream and produce therefrom a chilled first working fluid stream; and (iv) a pump configured to pressurize the chilled first working fluid stream 961a); (v) at least one working fluid stream splitter configured to divide the chilled first working fluid stream into a first portion and a second portion; (vi) a second heater configured to transfer heat from the second waste heat-containing stream to the first portion of the first working fluid stream to produce a thermally enhanced first portion of the first working fluid stream and a third waste heat-containing stream; and (vii) at least one working fluid stream combiner configured to combine two thermally enhanced streams of the first working fluid (29, 31); wherein the second closed loop thermal energy recovery cycle further comprises: (viii) a second expander configured to expand a vaporized second working fluid stream and to produce therefrom mechanical energy and an expanded second working fluid stream; (ix) a second condenser configured to cool a heat depleted second working fluid stream and to produce therefrom a chilled second working fluid stream; and (x) a pump configured to pressurize the chilled second working fluid stream; wherein the first heat exchanger is configured to produce the vaporized second working fluid stream and the heat depleted first working fluid stream; and wherein the second heat exchanger is configured to produce a thermally enhanced second portion of the first working fluid stream and a heat depleted second working fluid stream. (a) a first closed loop thermal energy recovery cycle comprising a first working fluid stream; (b) a second closed loop thermal energy recovery cycle comprising a second working fluid stream; (c) a first heat exchanger configured to transfer heat from the first working fluid stream to the second working fluid stream; (d) a second heat exchanger configured to transfer heat from the second working fluid stream to the first working fluid stream; (i) a first heater configured to transfer heat from a first waste heat-containing stream to the first working fluid stream to produce a vaporized first working fluid stream and a second waste heat-containing stream; (ii) a first expander configured to receive the vaporized first working fluid stream and to produce therefrom mechanical energy and an expanded first working fluid stream; (iii) a first condenser configured to cool a heat depleted first working fluid stream and produce therefrom a chilled first working fluid stream; and (iv) a pump configured to pressurize the chilled first working fluid stream 961a); (v) at least one working fluid stream splitter configured to divide the chilled first working fluid stream into a first portion and a second portion; (vi) a second heater configured to transfer heat from the second waste heat-containing stream to the first portion of the first working fluid stream to produce a thermally enhanced first portion of the first working fluid stream and a third waste heat-containing stream; and (vii) at least one working fluid stream combiner configured to combine two thermally enhanced streams of the first working fluid (29, 31); (viii) a second expander configured to expand a vaporized second working fluid stream and to produce therefrom mechanical energy and an expanded second working fluid stream; (ix) a second condenser configured to cool a heat depleted second working fluid stream and to produce therefrom a chilled second working fluid stream; and (x) a pump configured to pressurize the chilled second working fluid stream;