A new multi-generation system based on liquefied natural gas(LNG) cold energy utilization is proposed

which includes high-temperature proton exchange membrane fuel cell

transcritical organic Rankine cycle and liquefied natural gas cold energy utilization subsystem. The mathematical model of the new multi-generation system is established

and the influence of parameter variation on system performance is investigated. The calculation shows that

under the design condition

the power generation efficiency of the high-temperature proton exchange membrane fuel cell system and the transcritical organic Rankine cycle system are 31.51% and 23.45%

respectively.The total energy utilization efficiency of the new multi-generation system is 40.75%

and the exergy efficiency is 31.93%. The component with the maximal exergy loss(52.8%) is the high-temperature proton exchange membrane fuel cell. The combined efficiency and the exergy efficiency of the multi-generation system increases with the working temperature of the high-temperature proton exchange membrane fuel cell

but decreases with the increase of hydrogen mass flow rate and transcritical organic Rankine cycle low pressure.