Passive low temperature heat sources organic working fluid power generation method

A passive low temperature heat energy organic working fluid power generation method comprising:

• a. heating a first evaporator with low temperature heat source to evaporate an organic working fluid in the first evaporator,
• wherein temperature and pressure inside the first evaporator increase continually;
• b. triggering a first self-operated pressure regulator valve to open when a working pressure in the first evaporator reaches a set pressure value of 0.5 to 5 MPa;
• wherein the evaporated organic working fluid flows into a turbine through a second non-return valve and a connecting pipeline sequentially to push the turbine;
• c. driving a generator by the turbine to rotate through a coupling and output electric energy;
• wherein the evaporated organic working fluid flows into a condenser to condense;
• and a stable differential pressure is formed between the turbine and the condenser with the sudden decrease of volume of the evaporated organic working fluid to keep the turbine working continuously;
• d. triggering the first self-operated pressure regulator valve to close when the working pressure inside the first evaporator decreases to a set pressure value lower than 0.5 MPa;
• e. triggering a first self-operated liquid regulator valve and a third self-operated liquid regulator valve to open simultaneously when a liquid level of the first evaporator decreases to a set level value of 0 to 200 mm;
• wherein the condensed organic working fluid in the liquid-storage tank flows into the first evaporator through the third self-operated liquid regulator valve under gravity;
• f. triggering the first self-operated liquid regulator valve and the third self-operated liquid regulator valve to close simultaneously when the liquid level of the first evaporator increases to a set level value of 400 to 500 mm;
• g. heating a second evaporator to evaporate the organic working fluid in the second evaporator when the first evaporator is filled with the organic working fluid, and triggering the second self-operated pressure regulator valve to open when a working pressure in the second evaporator reaches a set pressure value of 0.5 to 5 MPa;
• wherein the condensed organic working fluid flows into the liquid-storage tank through a first non-return valve;
• h. triggering the second self-operated pressure regulator valve to close when the working pressure in the second evaporator decreases to a set pressure value lower than 0.5 MPa;
• i. triggering a second self-operated liquid regulator valve and a fourth self-operated liquid regulator valve to open simultaneously when the liquid level in the second evaporator decreases to a set level value of 0 to 200 mm;
• wherein the condensed organic working fluid in the liquid-storage tank flows into the second evaporator under gravity;
• j. triggering the second self-operated liquid regulator valve and the fourth self-operated liquid regulator valve to close simultaneously when the liquid level of the second evaporator increases to a set level value of 400 to 500 mm, wherein the organic working fluid in the second evaporator is to be heated for a next cycle;
• wherein during filling the second evaporator with the organic working fluid and heating the organic working fluid to a working point, the working pressure in the first evaporator reaches the set pressure value of 0.5 to 5 MPa by heating to evaporate the organic working fluid;
• and the first evaporator and the second evaporator in turn output the evaporated organic working fluid to continuously drive the turbine and output electric energy.