The Performance of the Kalina Cycle System 11(KCS-11) With Low-Temperature Heat Sources
The Performance of the Kalina Cycle System 11(KCS-11) With Low-Temperature Heat Sources
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DOI：
10.1115/1.2748815
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发表时间：
2007-09
影响因子：
3
通讯作者：
H. Hettiarachchi;Mihajlo N. Golubovic;W. Worek;Y. Ikegami
中科院分区：
文献类型：
--
作者：
H. Hettiarachchi;Mihajlo N. Golubovic;W. Worek;Y. Ikegami
随着能源需求的不断增加，开发低温热源的可能性具有重要意义。功率循环的最佳且经济有效的设计提供了一种利用低温热源的方法，否则这些低温热源可能会被丢弃。在此分析中，检查了卡林纳循环系统 11 (KCS11) 的低温地热热源性能，并与有机朗肯循环进行了比较。详细研究了氨分数和涡轮机入口压力对循环性能的影响。结果表明，对于给定的涡轮机入口压力，可以找到产生最大循环效率的最佳氨分数。此外，最大循环效率不一定会产生系统的最佳操作条件。此外，还必须考虑各种循环介质（即工作流体、冷却水和热源）的利用率以及每单位发电量的换热器面积。对于给定的条件，可以确定操作压力和氨分数的最佳范围，从而实现最佳的循环性能。总体而言，KCS11在中等压力下的综合性能优于有机朗肯循环。
The possibility of exploiting low-temperature heat sources has been of great significance with ever increasing energy demand. Optimum and cost-effective design of the power cycles provide a means of utilization of low-temperature heat sources which might otherwise be discarded. In this analysis, the performance of the Kalina cycle system 11 (KCS11) is examined for low-temperature geothermal heat sources and is compared with an organic Rankine cycle. The effect of the ammonia fraction and turbine inlet pressure on the cycle performance is investigated in detail. Results show that for a given turbine inlet pressure, an optimum ammonia fraction can be found that yields the maximum cycle efficiency. Further, the maximum cycle efficiency does not necessarily yield the optimum operating conditions for the system. In addition, it is important to consider the utilization of the various circulating media (i.e., working fluid, cooling water, and heat resource) and heat exchanger area per unit power produced. For given conditions, an optimum range of operating pressure and ammonia fraction can be identified that result in optimum cycle performance. In general, the KCS11 has better overall performance at moderate pressures than that of the organic Rankine cycle.