Isothermal power system

An isothermal power generating system for two-phase working fluids comprising:

• a boiler for boiling a working fluid;
• a first counter-flow heat exchanger for superheating working fluid vapor;
• an isothermal expander for expanding the superheated working fluid vapor to produce mechanical power;
• a heater for supplying a heating fluid to an isothermal expander to heat the working fluid vapor flowing through the isothermal expander;
• a means for conducting the expanded working fluid from the isothermal expander back through the first counter-flow heat exchanger to heat the working fluid flowing from the boiler;
• a condenser for condensing the working fluid vapor to a liquid;
• a pump for pumping working fluid into the boiler;
• and
• a second counter-flow heat exchanger for preheating the working fluid flowing to the boiler;
• wherein working fluid vapor from the boiler flows through the first counter-flow heat exchanger, and wherein the isothermal expander extracts mechanical energy from the working fluid vapor as the working fluid vapor expands, and wherein the working fluid flows back through the first counter-flow heat exchanger and releases heat to superheat the working fluid vapor flowing from the boiler, and wherein the working fluid flows through the second counter-flow heat exchanger to preheat the working fluid liquid, and the working fluid vapor flows into the condenser to be condensed to a liquid, and wherein the working fluid liquid is pumped through the second counter-flow heat exchanger to the boiler.