Thermodynamic and economic analyses and optimization of a multi-generation system composed by a compressed air storage, solar dish collector, micro gas turbine, organic Rankine cycle, and desalination system
Thermodynamic and economic analyses and optimization of a multi-generation system composed by a compressed air storage, solar dish collector, micro gas turbine, organic Rankine cycle, and desalination system
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DOI：
10.1016/j.enconman.2018.05.019
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发表时间：
2018-07
影响因子：
10.4
通讯作者：
Mohammad Javidmehr;Fatemeh Joda;A. Mohammadi
中科院分区：
文献类型：
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作者：
Mohammad Javidmehr;Fatemeh Joda;A. Mohammadi
在这项工作中，一个由压缩空气储能、微型燃气轮机、有机朗肯循环、太阳能盘收集器和多效蒸馏组成的混合系统被呈现为一个联合的电力、热能和淡水生产系统。应用能量和火用分析来研究系统的热力学性能。结果表明：在充电模式下，系统耗电量278 kWh，产生热水约3.7 吨。此外，该系统能够在排放期间产生高达523 千瓦时的电能和2.5 吨的饮用水。充电周期为6.52 h，放电周期为4 h。火用分析表明，太阳能盘集热器和燃烧室是造成火用破坏的主要原因。采用参数分析方法研究了对系统性能有重要影响的关键参数。这些参数包括洞穴最小和最大压力，燃气轮机进口温度，碟式收集器孔径直径，汽轮机进口压力和脱盐器给水温度。优化结果表明，采用最大、最小压力上限时，往返效率可由65.2%提高到70.35%。此外，提高燃气轮机进口温度，将气室最大和最小压力限制在其下限，可使火用效率提高19.18%。最后，对系统的主要成本和收入来源进行了经济分析。正如多目标优化所表明的那样，设计能产生更多电能的条件可以大大提高系统的经济性能。
In this work, a hybrid system composed of a compressed air energy storage, a micro gas turbine, an organic Rankine cycle, a solar dish collector, and a multi effect distillation is presented as a combined power, heat, and fresh water production system. Energy and exergy analyses are applied to investigate thermodynamic performance of the system. The results show that the system consumes 278 kWh electricity and produces about 3.7 ton hot water during charging mode. Also, the system is capable of generating up to 523 kWh electrical energy and 2.5 ton potable water during the discharge period. The charge and the discharge period are 6.52 and 4 h respectively. Exergy analyses reveals that solar dish collector and combustion chamber are the major contributors for exergy destruction. Parametric analysis is employed to investigate the key parameters which have the major influence on the system performance. These parameters include cavern minimum and maximum pressures, gas turbine inlet temperature, dish collector aperture diameter, steam turbine inlet pressure, and desalinator feed water temperature. Optimization results show that round trip efficiency can rise from 65.2% to 70.35%, using upper limits of cavern minimum and maximum pressures. Besides, rising inlet temperature of gas turbine and restricting air cavern maximum and minimum pressures to their lower limits results in a 19.18% exergy efficiency improvement. Finally, economic analysis is performed to evaluate main cost and income sources of the system. As multi objective optimization shows, devising conditions that lead to produce more electrical energy improves system economic performance considerably.