Chilled power generation system, energy system including a chilled power generation system, method of using a chilled power generation system, and method of using an energy system

摘要

The present invention is a supercritical pressure power generation (LSG) of a cryogenic fluid, and a cold utilization system capable of enhancing the utilization efficiency of cold exergy of liquefied gas while freely controlling the gas delivery pressure on the outlet side of the secondary expansion turbine. I will provide a. The LSG includes a booster pump that pressurizes a low-temperature liquefied gas in a liquid state up to a predetermined pressure equal to or higher than its critical pressure, a Rankine cycle primary power generator, and a direct expansion secondary power generator. In order to make effective use of the liquefied gas cold energy, it is more efficient to use the cold energy as pressure exergy rather than temperature. LSG converts cold heat exergy into pressure exergy more preferentially, and can determine the optimum operating conditions for maximum conversion efficiency by the liquefied gas composition, the heating source temperature, and the gas delivery pressure. As an example, in the maximum power generation case where the gas delivery pressure is low, the power generation basic unit is about 486 [kJ / kg] (135 [kWh / ton]) as an actual machine correction value, and about 54% of the cold energy can be recovered as electric power.