A review of integrated cryogenic energy assisted power generation systems and desalination technologies
A review of integrated cryogenic energy assisted power generation systems and desalination technologies
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DOI：
10.1016/j.applthermaleng.2022.119836
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发表时间：
2022-12
影响因子：
6.4
通讯作者：
S. Farrukh;D. Wu;R. AL-Dadah;Wenzhong Gao;Zhongcheng Wang
中科院分区：
文献类型：
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作者：
S. Farrukh;D. Wu;R. AL-Dadah;Wenzhong Gao;Zhongcheng Wang
过去二十年，由于更严格的环境政策和全球气温升高，全球液化天然气贸易快速增长。过去几十年来，液化天然气低温能源利用引起了广泛关注，其中发电系统是研究最多的应用。本综述首先探讨了可用于集成发电循环的不同优化技术。每个周期的优化技术包括基于工作流体、参数和上部结构的优化，并优先考虑不同的目标函数。联合循环比独立循环表现出更高的效率，并且应该对联合循环中的每个组件进行高级能量分析，从而实现更好的多目标优化。使用液化天然气低温能源作为冷却介质可以强化海水淡化技术。就产水量和回收率而言，利用LNG低温能的低压单次常规蒸馏是最佳选择。然而，冷冻海水淡化正在成为一种新的能源密集度较低的方法，尽管还需要更多的研究来对其优化。在低温热电循环的冷凝器出口处，LNG温度仍然相当低，并且含有合理量的低温能量。这种能源最适合用于海水淡化装置。这导致动力循环与海水淡化装置的集成，目前可用的有限研究表明这样做是可行的。
The last two decades have seen a rapid growth in LNG trade around the world, due to stricter environmental policies and increasing global temperatures. LNG cryogenic energy utilization has attracted a lot of attention over the last few decades, with power generation systems being the most studied application. This review firstly looks at the different optimization techniques available for integrated power generation cycles. The optimization techniques of each cycle include working fluid, parametric and superstructure based optimizations, with different objective functions being prioritized. Combined cycles exhibit higher efficiency than their standalone counterparts, and an advanced exergetic analysis of each component in the combined cycle should be performed, which leads to better multi-objective optimization. Desalination technologies can be intensified using LNG cryogenic energy as the cooling medium. In terms of water production and recovery rates, low pressure single conventional distillation utilizing LNG cryogenic energy is the best option. However, freeze desalination is emerging as a new less energy intensive method, albeit more research is needed for its optimization. At the condenser outlet of the low temperature thermal power cycles, the LNG temperature is still quite low and contains a reasonable amount of cryogenic energy. This energy is most suitable for use in seawater desalination units. This leads to the integration of power cycles with desalination units, and the limited research currently available suggests it is feasible to do so.