THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Shouguang Yao

,

Likang Xu

,

Liang Tang

NEW COLD-LEVEL UTILIZATION SCHEME FOR CASCADE THREE-LEVEL RANKINE CYCLE USING THE COLD ENERGY OF LIQUEFIED NATURAL GAS

ABSTRACT
The topic of this study is the intermediate fluid vaporizer gasification system for a liquefied natural gas floating storage regasification unit. To reduce the loss of heat exchange, the primary distributary cascade three-level Rankine cycle is optimised based on the cascade three-level Rankine cycle that uses the cold energy of liquefied natural gas to generate power. The optimized primary distributary cascade three-level Rankine cycle is then compared with the original cascade three-Rankine cycle established under the same conditions. Then, a secondary distributary cascade three-level Rankine cycle is proposed. Results show that under a LNG flow of 175t/h, the primary distributary cascade three-level Rankine cycle system exhibits a maximum net output power of 4130.72 kW and an exergy efficiency of 23.78%, which is higher than that of the typical cascade three-level Rankine cycle. Moreover, the net output power and exergy efficiency of the primary distributary cascade three-level Rankine cycle system increased by 3.71% and by 3.84%, respectively. The secondary distributary cascade three-level Rankine cycle system exhibits a maximum net output power of 4143.75 kW and an exergy efficiency of 23.85%.
KEYWORDS
LNG, Three-level Rankine Cycle, power generation, Distributary
PAPER SUBMITTED: 2017-10-12
PAPER REVISED: 2018-07-24
PAPER ACCEPTED: 2018-08-09
PUBLISHED ONLINE: 2018-09-22
DOI REFERENCE: https://doi.org/10.2298/TSCI171012239Y
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 6, PAGES [3865 - 3875]
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New cold-level utilization scheme for cascade three-level rankine cycle using the cold energy of liquefied natural gas

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence