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近年来Kalina循环引起了国际动力界的注意。美国一些公司正筹划燃气机轮组和Kalina底部循环组成的复合循环的试验研究。该循环选用非共沸的氨水混合物作工质。其特出的优点是采用了非共沸的二元工质,从而在气化过程中,不同于单元工质的等温汽化,而是一升温的过程。这样,与作为有限热源的烟气的放热过程中的温度变化的匹配情况较为合理,使因换热不匹配而引起的作功能力损失有所减少。但水蒸汽中混入易挥发的氨蒸汽后,在常温下冷凝压力过高,例如,氨的质量浓度为0.7的混合蒸汽用18℃的水使之冷凝时,
The Kalina cycle has drawn the attention of the international power community in recent years. A few companies in the United States are planning a pilot study of a compound cycle consisting of a gas turbine wheel train and a Kalina bottom cycle. The cycle of non-azeotropic ammonia mixture used as working fluid. Its special advantage is the use of non-azeotropic binary refrigerant, which in the gasification process, different from the unit of the refrigerant isothermal vaporization, but a warming process. In this way, it is more reasonable to match the temperature change in the exothermic process of the flue gas as the limited heat source, so as to reduce the loss of working ability caused by the mismatch in heat transfer. However, after the steam is mixed with the volatile ammonia vapor, the condensing pressure is too high at normal temperature. For example, when the mixed steam with a mass concentration of ammonia of 0.7 is condensed with water at 18 ° C,