PURPOSE: A waste-heat recovery power generation and solar power generation method are provided to produce the electricity by recycling the waste heat of steam vapor. CONSTITUTION: A waste-heat recovery power generation and solar power generation method comprises next steps. When steam vapor is collected from solution in an evaporation bath, the steam vapor of the evaporation bath is pressed not heat. The steam vapor is compressed to make the temperature of compressed vapor exceed to the temperature of the evaporation bath by 5C. The heat is sent to the heat exchanging tube and evaporation bath.
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