Novel cogeneration power system with liquefied natural gas (LNG) cryogenic exergy utilization

We propose a new cogeneration power system with two energy sources of fuel chemical energy and liquefied natural gas (LNG) cryogenic energy, and two outputs of electrical power and cooling power. Due to the advanced integration of system and cascade utilization of LNG cryogenic energy, the system ha...

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Bibliographic Details
Published in:Energy (Oxford) 2004-03, Vol.29 (4), p.497-512
Main Authors: Deng, Shimin, Jin, Hongguang, Cai, Ruixian, Lin, Rumou
Format: Article
Language:English
Subjects:
Applied sciences
Combined power plants
Crude oil, natural gas and petroleum products
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fuels
Installations for energy generation and conversion: thermal and electrical energy
Petroleum products, gas and fuels. Motor fuels, lubricants and asphalts
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Summary:We propose a new cogeneration power system with two energy sources of fuel chemical energy and liquefied natural gas (LNG) cryogenic energy, and two outputs of electrical power and cooling power. Due to the advanced integration of system and cascade utilization of LNG cryogenic energy, the system has excellent energy saving: chemical energy of fuel and LNG cryogenic energy are saved by 7.5–12.2% and 13.2–14.3%, respectively. As CO 2 is selected as working fluid and oxygen as fuel oxidizer, CO 2 is easily recovered as a liquid with LNG vaporization. In this paper, the typical recuperative Rankine cycle and the corresponding cogeneration system are described and a detailed thermodynamic analysis is carried out to reveal the principle of the cycle and system. Furthermore, the influence of key parameters on performance is discussed. Considering the engineering application, the technical advantages and concerns are pointed out.
ISSN:0360-5442
DOI:10.1016/j.energy.2003.11.001