Molecular design of refrigerants and their applications for utilizing LNG cold energy

摘要

Refrigeration system is regarded as the significant factor to influencethe utilization efficiency of liquefied natural gas (LNG) cold energy,and proper selection of refrigerant can decrease exergy loss andincrease the cold energy utilization. As refrigerant played a key role forthermal transport procedure, various refrigerant design methods werereviewed, and the refrigerant selection principle was determined.Furthermore, a new molecular design method for newly developedrefrigerants and existing refrigerants modified was proposed. Based onthis method, refrigerants with optimal thermodynamic properties weregenerated, which could work efficiently for LNG cold energy powergeneration system. For the molecular design method verification, aLNG cold energy power generation system with two circulation loopswas designed, seawater worked as high temperature heat source,combined with the low temperature LNG cold energy.