Performance analysis of a CCHP system based on SOFC/GT/CO2 cycle and ORC with LNG cold energy utilization
Performance analysis of a CCHP system based on SOFC/GT/CO2 cycle and ORC with LNG cold energy utilization
复制标题
DOI：
10.1016/j.ijhydene.2019.02.201
复制
发表时间：
2019-11
影响因子：
7.2
通讯作者：
Yang Liu;Jitian Han;Huailiang You
中科院分区：
文献类型：
--
作者：
Yang Liu;Jitian Han;Huailiang You
提出了一种基于SOFC/GT/ co2循环和有机朗肯循环（ORC）结合LNG冷能利用的新型热电联产系统，实现了能量的梯级利用和二氧化碳的捕集。建立了数学模型，并用能量法和火用法对系统性能进行了分析。结果表明，在给定条件下，系统的综合能源利用率、净发电量和总用能效率分别可达79.48%、79.81%和62.29%左右，SOFC的发电效率为50.96%，系统的co2捕集率为79.2 kg/h。结果表明，该热电联产系统可以达到接近零排放的高能源利用效率。研究了燃料利用系数、空燃比、阴极进料氧浓度、涡轮压缩比等关键参数对整个系统性能的影响。
An innovative CCHP system based on SOFC/GT/CO2cycle and the organic Rankine cycle (ORC) with LNG cold energy utilization is proposed to achieve cascade energy utilization and carbon dioxide capture. The mathematical models are developed and the system performance is analyzed using the energy and exergy methods. The results illustrate that the comprehensive energy utilization, the net power generation and the overall exergy efficiencies of the system can reach about 79.48%, 79.81% and 62.29%, respectively, while the power generation efficiency of the SOFC is 50.96% and the CO2capture rate of the proposed CCHP system is 79.2 kg/h under the given conditions. It shows that the proposed CCHP system can reach a high energy utilization efficiency with near zero emissions. The influence of some key parameters, such as the fuel utilization factor, the air-fuel ratio, the oxygen concentration in the cathode feed and the compression ratio of the SCO2turbine on the performance of the entire system is studied.