The potential of exhaust waste heat recovery (WHR) from marine diesel engines via organic rankine cycle
The potential of exhaust waste heat recovery (WHR) from marine diesel engines via organic rankine cycle
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DOI：
10.1016/j.energy.2018.10.064
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发表时间：
2019
期刊：
影响因子：
9
通讯作者：
Z. M. Nawi;S. Kamarudin;S. Abdullah;S. Lam
中科院分区：
文献类型：
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作者：
Z. M. Nawi;S. Kamarudin;S. Abdullah;S. Lam
由于化石燃料能源的枯竭和二氧化碳的无限排放而导致的燃料价格上涨，引起了人们对提高船用柴油发动机热效率的技术的新兴趣。提高系统热效率的一种有前途的机制是将发动机废热转化为更有用的能量形式，无论是机械能还是电能。因此，本研究利用选定的微藻作为工作流体通过有机朗肯循环（ORC）生产生物乙醇，研究了船用柴油发动机废气废热回收的潜力。它还检查系统热效率并确定工厂的夹点温度。基于高产量，微藻Dunaliella tertiolecta、Chlamydomonas fasciata Ettl 437和Synechococcus PCC 7002被选为生物乙醇生产者。以最大净功率输出和高系统热效率作为评价标准，选择性能最佳的微藻。结果表明，在所选的三种微藻中，聚球藻 PCC 7002 在废气质量流量为 4189kgh−1 时表现出最高效率，约为 2.28%，而净功率输出约为 5.10kW。
The rise of fuel prices due to the depletion of fossil fuel energy and unlimited carbon dioxide let-off are creating a renewed interest in techniques to increase the thermal efficiency of marine diesel engines. One promising mechanism to achieve improvement in system thermal efficiency is the conversion of engine waste heat to a more useful form of energy, either mechanical energy or electrical energy. Thus, this study investigates the potential of exhaust waste heat recovery from marine diesel engines using bioethanol production from selected microalgae as the working fluid via organic Rankine cycle (ORC). It also examines the system thermal efficiency and determines the pinch temperature of the plant. The microalgaeDunaliella tertiolecta,Chlamydomonas fasciata Ettl 437andSynechococcus PCC 7002are chosen as bioethanol producers based on the high yield of production. The maximum net power output and high system thermal efficiency are chosen as the evaluation criteria to select the microalgae with the best performance. The results demonstrate that among the three selected microalgae,Synechococcus PCC 7002shows the highest efficiency of approximately 2.28% for the mass flowrate of exhaust gas of 4189 kgh−1, while the net power output was approximately 5.10 kW.