液化天然气CCHP系统的乙烯-丙烷级联动力循环及工艺模拟

A novel ethylene-propane cascade Rankine cycle for LNG-CCHP system and process simulations

文中提出了一种适用于LNG冷热电联产系统的两级乙烯-丙烷级联朗肯动力循环,并采用HYSYS软件对这一级联动力循环进行了工艺模拟,LNG的流量为219kg/h时,共可以产生电力14.06W,并向空调供冷50.24kW。与不采用冷量回收的装置相比,总的能量利用率从83.22%提高到了85.17%。这说明级联式动力循环通过梯级利用LNG的低温冷能,并回收烟气排放的一部分废热,使系统获得了高的发电、供冷效率。

A ethylene-propane cascade Rankine power cycle was presented and simulated using HYSYS software.The electrical power of 14.06 kW was able to generate and 50.24 kW cooling capacities were able to supply to air conditioning system.The total energy efficiency was increased from 83.22% to 85.17% in comparison with the system without cold recovery apparatus.The high energy efficiency can be attributed to the cascade utility of cold energy at different temperature and recovery the exhausted heat of fume.