EXHAUST HEAT RECOVERY APPARATUS, GAS TURBINE PLANT INCLUDING THE SAME, AND EXHAUST HEAT RECOVERY METHOD

摘要

PROBLEM TO BE SOLVED: To effectively utilize exhaust heat from a gas turbine by a low boiling point Rankine cycle and furthermore to miniaturize the low boiling point medium Rankine cycle.SOLUTION: There is provide an exhaust heat recovery apparatus that includes a low boiling point medium Rankine cycle 150 in which a low boiling point medium LM circulates while repeating condensation and evaporation, a heated water line 171 for guiding heated liquid water from a waste heat recovery boiler 110 for heating the water by an exhaust gas EG from a gas turbine 10 to the low boiling point medium Rankine cycle 150, and a water recovery line 178 for returning the water having passed through the low boiling point medium Rankine cycle 150 to the waste heat recovery boiler 110. The low boiling point medium Rankine cycle 150 has a heater 151 for heating the low boiling point medium LM by heat exchange between the liquid low boiling point medium and the liquid water having passed through the heated water line 171.