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Proposal of high-efficient recovery schemes of liquefied natural gas cryogenic energy.

Author(s) : TAN H. B., LI Y. Z., YAN N., et al.

Summary

LNG is a kind of high-quality and cryogenic clean fuel. Due to its characteristics at low temperature, plenty of cryogenic energy can be utilized during the LNG gasification process. The cold energy recovery and utilization might be performed in two ways: i.e. cold exergy utilization and cooling capacity recovery. A simple thermal engine with a Stirling cycle between the atmosphere and the LNG is proposed as an efficient example of cold exergy utilization. Moreover, a novel air separation system using LNG as the cold sink is put forward to recover the LNG cryogenic capacity. The thermal performances of both novel systems are analyzed and calculated respectively. According to the analysis and calculation, the exergy efficiency of the Stirling engine system is higher than that of the combined cycle used in power plants. The air separation system with LNG as the cooling source can save a considerable amount of power energy. The power consumption of per-kilogram liquid product may decrease by 54%.

Details

  • Original title: Proposal of high-efficient recovery schemes of liquefied natural gas cryogenic energy.
  • Record ID : 2008-1962
  • Languages: English
  • Source: Cryogenics and refrigeration. Proceedings of ICCR'2008.
  • Publication date: 2008/04/05

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