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Auxiliary power through marine waste heat recovery using a CO_2-organic cascading cycle

机译：使用CO_2-有机级联循环通过海洋废热回收辅助电力

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An appreciable part of primary energy input to a marine diesel engine is rejected as waste heat. Thus, through marine diesel engine waste heat recovery significant amount of secondary energy can be produced to satisfy the auxiliary power requirement of the marine ship. In present study, a CO_2-organic fluid cascading cycle is considered for the utilization of the waste heat released by the marine diesel engine. R290, R600 and R1233zd (E) are considered as the working fluids of the bottoming cycle for their lower global warming potentials. The analysis revealed that power output of the cascading cycle is comparable to that of the baseline transcritical CO_2 power cycle. However, for similar power output, operating pressure in the flue gas-CO_2 heat recovery unit of the transcritical CO_2 power cycle is significantly higher compared to that of the cascading cycle. Thus, possible leakage due to very high operating pressure of a conventional CO_2 power cycle can be addressed by using the cascading system. Bare module costs per unit power output of cascading cycles are also significantly smaller. It is also apparent from the study that the marine diesel engine waste heat recovery through the CO_2-organic cascading cycle would lead to 8-9.5% annual fuel saving. Reduced fuel consumption will also result in lesser CO_2 emission from the marine ship.
机译：对船用柴油发动机的主要能量输入的可观部分被拒绝作为废热。因此，通过海洋柴油发动机废热恢复，可以生产大量的二次能量，以满足海船的辅助动力要求。在本研究中，考虑使用CO_2-有机流体级联循环循环循环循环循环循环循环循环循环循环，用于利用船用柴油发动机释放的废热。 R290，R600和R1233ZD（E）被认为是其较低的全球变暖潜力的底部循环的工作流体。分析显示，级联周期的功率输出与基线跨临界CO_2电力循环相当。然而，对于类似的功率输出，与级联循环相比，跨临界CO_2功率循环的烟气-CO_2热回收单元中的操作压力显着更高。因此，可以通过使用级联系统来解决由于传统CO_2功率循环的非常高的工作压力而导致的可能泄漏。级联周期的每单位功率输出的裸模块成本也明显更小。从研究中也显而易见的是，海洋柴油发动机废热通过CO_2-有机级联循环恢复将导致每年节省8-9.5％。降低的燃料消耗也会导致海船的少数CO_2排放。

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