Advanced exergy analysis of the Kalina cycle applied for low temperature enhanced geothermal system
Advanced exergy analysis of the Kalina cycle applied for low temperature enhanced geothermal system
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DOI：
10.1016/j.enconman.2015.11.017
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发表时间：
2016-01
影响因子：
10.4
通讯作者：
M. Fallah;S. Mahmoudi;M. Yari;Reza Akbarpour Ghiasi
中科院分区：
文献类型：
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作者：
M. Fallah;S. Mahmoudi;M. Yari;Reza Akbarpour Ghiasi
近年来，使用低温热源的可能性一直是不同研究和学术中心的热门话题。在这方面，卡林纳循环因其有前途的特点而受到广泛关注。利用工程方程求解器（EES）软件，对低温强化地热源驱动的Kalina循环进行了常规火用分析。在验证了传统火用分析模型的正确性后，将火用破坏率分解为内源性、外源性、可避免和不可避免的部分，以提供关于系统部件的改进潜力的详细信息。先进的分析结果表明，该循环有很大的潜力，效率提高。先进的火用分析方法对冷凝器的改进优先，对涡轮机和蒸发器的改进优先。然而，从传统的火用分析，计算的蒸发器的火用损失高于涡轮机。
In recent years, the possibility of using low temperature heat sources has been followed as a hot topic in different research and academic centers. In this regard, the Kalina cycle has been paid a lot of attention because of its promising features. Using the engineering equation solver (EES) software, conventional exergy analysis is carried out in this study for the Kalina cycle driven by a low temperature enhanced geothermal source. After validating the developed model for conventional exergy analysis, the advanced exergy analysis, i.e., splitting exergy destruction rate into endogenous, exogenous, avoidable and unavoidable parts, is performed to provide detailed information about improvement potential of the system components. The results of advanced exergy analysis show that the cycle has high potential for efficiency improvement. It is also revealed that the advanced exergy analysis gives the improvement priority first for the condenser, then for the turbine and the evaporator. From the conventional exergy analysis however, the exergy destruction calculated for the evaporator is higher than that for the turbine.