An organic Rankine cycle comprising: a dry organic working fluid flowing in a high pressure stream, a low pressure stream and a third stream; a high pressure stage through which the high pressure stream flows, wherein the high pressure stage comprises a high pressure pump, a high pressure preheater, a high pressure evaporator and a high pressure expander; a low pressure stage fluidly coupled to the high pressure stage, wherein the low pressure stream flows through the low pressure stage, wherein the low pressure stage comprises a low pressure pump, a low pressure preheater, a low pressure evaporator and a low pressure expander; a third pressure stage through which the third stream flows, wherein the third pressure stage comprises a third pressure pump, a third pressure preheater, a third pressure evaporator and a third pressure expander, wherein the third pressure stage is fluidly coupled to the low pressure stage; a first mixer configured to combine the high pressure stream and the low pressure stream, wherein a first mixed enthalpy stream exits the first mixer, wherein the first mixer is configured to combine the high pressure stream exiting the high pressure expander and the low pressure stream exiting the low pressure evaporator such that the high pressure expander and the low pressure expander are arranged in series; a second mixer configured to combine the first mixed enthalpy stream and the third stream, wherein a second mixed enthalpy stream exits the second mixer; a condenser configured to condense the second mixed enthalpy stream; a first tee configured to split the first mixed enthalpy stream into the high pressure stream and the low pressure stream; and a second tee configured to split the second mixed enthalpy stream exiting the condenser into the first mixed enthalpy stream and the third stream; wherein a heat source stream configured to supply thermal energy to the high pressure evaporator, after exiting the high pressure evaporator is split in a heat source stream tee such that a high pressure preheating stream enters the high pressure preheater and a low pressure evaporating stream enters the low pressure evaporator, and wherein the high pressure preheating stream and the low pressure evaporating stream combine in a heat source mixer before entering the third pressure preheater. a dry organic working fluid flowing in a high pressure stream, a low pressure stream and a third stream; a high pressure stage through which the high pressure stream flows, wherein the high pressure stage comprises a high pressure pump, a high pressure preheater, a high pressure evaporator and a high pressure expander; a low pressure stage fluidly coupled to the high pressure stage, wherein the low pressure stream flows through the low pressure stage, wherein the low pressure stage comprises a low pressure pump, a low pressure preheater, a low pressure evaporator and a low pressure expander; a third pressure stage through which the third stream flows, wherein the third pressure stage comprises a third pressure pump, a third pressure preheater, a third pressure evaporator and a third pressure expander, wherein the third pressure stage is fluidly coupled to the low pressure stage; a first mixer configured to combine the high pressure stream and the low pressure stream, wherein a first mixed enthalpy stream exits the first mixer, wherein the first mixer is configured to combine the high pressure stream exiting the high pressure expander and the low pressure stream exiting the low pressure evaporator such that the high pressure expander and the low pressure expander are arranged in series; a second mixer configured to combine the first mixed enthalpy stream and the third stream, wherein a second mixed enthalpy stream exits the second mixer; a condenser configured to condense the second mixed enthalpy stream; a first tee configured to split the first mixed enthalpy stream into the high pressure stream and the low pressure stream; and a second tee configured to split the second mixed enthalpy stream exiting the condenser into the first mixed enthalpy stream and the third stream; wherein a heat source stream configured to supply thermal energy to the high pressure evaporator, after exiting the high pressure evaporator is split in a heat source stream tee such that a high pressure preheating stream enters the high pressure preheater and a low pressure evaporating stream enters the low pressure evaporator, and wherein the high pressure preheating stream and the low pressure evaporating stream combine in a heat source mixer before entering the third pressure preheater.