CO2与R41跨临界朗肯循环低温发电系统比较分析

本文以R41为工质的跨临界朗肯循环低温发电系统进行了热力性能分析,并与CO_2跨临界发电系统进行比较,结果表明:R41和CO_2系统均存在一个最优进口压力使得热效率在相同的膨胀机进口温度下达到最大值,且膨胀机进口温度越高,对应的最优压力也越大。同热效率一样,系统均存在一个最优进口压力使得净功在相同的膨胀机进口温度下达到最大值,且R41系统比CO_2系统所作的最大净功平均提高52.6%,最优进口压力平均降低41.6%,系统火用效率平均提高24.8%。

The Compare ion analysis of Low-temperature Power Generation Transcritical Rankine Cycle with R41 and CO2

R41 is flammable, but because of the low critical temperature, could be used in transcritical cycle. So the performance of the transcritical Rankine cycles for power generation using R41 was analyzed, and compared with CO2 system .The results show that for CO2 and R41 there is an optimum inlet pressure that the thermal efficiency will reach the maximum value for each inlet temperature. When turbine inlet temperature is higher, its corresponding optimum inlet pressure is also greater. Namely there is an optimum inlet pressure that the net power output can reach the maximum value for the same inlet temperature, and the average value of the maximal net power output compared R41 with CO2 increased by more than 52.6%,and the optimal inlet pressure decreased by over 41.6%,and the second law efficiency increased by 24.8%