TY - JOUR
TI - New cold-level utilization scheme for cascade three-level rankine cycle using the cold energy of liquefied natural gas
AU - Yao Shouguang
AU - Xu Likang
AU - Tang Liang
JN - Thermal Science
PY - 2019
VL - 23
IS - 6
SP - 3865
EP - 3875
PT - Article
AB - 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%.