关键词:

液化天然气, 冷能, 回收, 动力循环, 参数分析

Abstract:

A combined power cycle with LNG cold energy recovery consisting of Rankine cycle using ammonia-water as working fluid, power cycle of combustion gas, and LNG cycle, was presented.The energy balance equations and exergy balance equations of heat exchanger and power equipment in the combined power cycle were established.Taking condensation temperature of Rankine cycle, inlet and outlet pressure of turbine of Rankine cycle, inlet and outlet pressures of turbine of LNG cycle as key parameters, the influences of these parameters on the thermal efficiency and exergy efficiency of the combined power cycle were analyzed.Analytical results showed that the thermal efficiency and exergy efficiency increased with increasing condensation temperature of Rankine cycle, inlet pressure of turbines of Rankine cycle and LNG cycle, and decreased with increasing outlet pressure of turbines of Rankine cycle and LNG cycle.

Key words:

液化天然气, 冷能, 回收, 动力循环, 参数分析