Power generation system and electricity generation system using the power generation system

A power generation system for generating power by circulating operating fluid within a system of pressure-resistant closed circuit while changing state of the operating fluid and converting foreign heat energy given to the operating fluid into kinetic energy,

• wherein the pressure-resistant closed circuit comprising:
• an evaporation chamber in which gas phase and liquid phase of the operating fluid are stored at a temperature near a boiling point and which is constituted so as to be capable of heat exchange between heating fluid supplied from outside a system of the pressure-resistant closed circuit and gas phase of the operating fluid;
• a heat-insulating expansion chamber liquefying the operating fluid supplied from the evaporation chamber by temperature decrease according to adiabatic expansion;
• a turbine rotating by contacting with the operating fluid flowing based on pressure difference between pressure of the evaporation chamber side and pressure of the heat-insulating expansion chamber side within a turbine room arranged on halfway of an operating fluid channel communicating the evaporation chamber and the heat-insulating expansion chamber;
• an energy transmission mechanism having a rod extended from the turbine and outputting power;
• a liquefied operating fluid reflux means for refluxing the operating fluid liquefied in the heat-insulating expansion chamber to the evaporation chamber;
• and
• an auxiliary heat exchanger assisting liquefaction of the operating fluid, the auxiliary heat exchanger being arranged at a position contactable with the operating fluid introduced from the turbine room;
• wherein the operating fluid diverted from halfway of the operating fluid channel communicating the evaporation chamber and the turbine room is introduced in the auxiliary heat exchanger through a pressure reducing valve and the operating fluid introduced in the heat-insulating expansion chamber from the turbine room is cooled and liquefaction is assisted, and
• wherein the operating fluid discharged from the auxiliary heat exchanger is compressed and condensed by the compression liquefaction reflux means and the operating fluid is refluxed to the evaporation chamber.