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A combined power cycle utilizing low-temperature waste heat and LNG cold energy

Shi, Xiaojun ; Che, Defu

Energy Conversion and Management, 2009, Vol.50(3), pp.567-575 [Periódico revisado por pares]

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  • Título:
    A combined power cycle utilizing low-temperature waste heat and LNG cold energy
  • Autor: Shi, Xiaojun ; Che, Defu
  • Assuntos: Power Generation ; Low-Grade Waste Heat ; Ammonia–Water Mixture ; LNG ; Thermodynamic Analysis ; Power Generation ; Low-Grade Waste Heat ; Ammonia–Water Mixture ; LNG ; Thermodynamic Analysis ; Engineering
  • É parte de: Energy Conversion and Management, 2009, Vol.50(3), pp.567-575
  • Descrição: This paper has proposed a combined power system, in which low-temperature waste heat can be efficiently recovered and cold energy of liquefied natural gas (LNG) can be fully utilized as well. This system consists of an ammonia–water mixture Rankine cycle and an LNG power generation cycle, and it is modelled by considering mass, energy and species balances for every component and thermodynamic analyses are conducted. The results show that the proposed combined cycle has good performance, with net electrical efficiency and exergy efficiency of 33% and 48%, respectively, for a typical operating condition. The power output is equal to 1.25 MWh per kg of ammonia–water mixture. About 0.2 MW of electrical power for operating sea water pumps can be saved. Parametric analyses are performed for the proposed combined cycle to evaluate the effects of key factors on the performance of the proposed combined cycle through simulation calculations. Results show that a maximum net electrical...
  • Idioma: Inglês

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