高温太阳能热化学与甲烷互补的SOFC-GT-KC复合动力系统研究  

STUDY ON SOFC-GT-KC HYBRID POWER SYSTEM WITH HIGH TEMPERATURE SOLAR THERMOCHEMISTRY AND METHANE COMPLEMENTARY

作　　者：王秋实 蒋潇甫 段立强[1] 郑红旭 卢紫艺 Wang Qiushi;Jiang Xiaofu;Duan Liqiang;Zheng Hongxu;Lu Ziyi(School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;State Grid Fujian Electric Power Research Institute,Fuzhou 350007,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]国网福建省电力有限公司电力科学研究院,福州350007

出　　处：《太阳能学报》2023年第10期218-228,共11页Acta Energiae Solaris Sinica

基　　金：国家电网有限公司总部科技项目(5100-202199531A-0-5-ZN)。

摘　　要：提出一种新型高温太阳能热化学与甲烷互补固体氧化物燃料电池-燃气轮机-卡琳娜循环(SOFC-GT-KC)复合动力系统,利用高温太阳能热驱动甲烷重整制氢,将太阳能转化为富氢燃料合成气中的化学能,实现了太阳能的转化与储存。以产生的氢气驱动SOFC-GT-KC复合系统发电,实现能量的梯级利用。分析各关键参数对新系统热力性能影响并研究在不同季节典型日系统运行特性,给出不同的运行策略。研究结果表明:在设计工况下,系统发电效率为62.28%,[火用]效率为64.92%,与相同条件下的无太阳能热化学过程互补的SOFC-GT-KC系统相比,新系统输出功率提升31.90%,且[火用]效率提升2.77个百分点。额定工况下,输出同样的电功率,新系统要比参考系统节省化石燃料29.6%。A new high temperature solar thermochemistry and methane complementary solid oxide fuel cell-gas turbine-Kalina cycle(SOFC-GT-KC)hybrid power system is proposed in this paper,which uses high temperature solar energy to drive methane reforming to produce hydrogen,converts solar energy into chemical energy of hydrogen-rich fuel syngas,and realizes the conversion and storage of solar energy.The SOFC-GT-KC system generates electricity using the produced hydrogen,achieving the energy cascade utilization.This study explores the operating characteristics of the new system on typical days in various seasons,evaluates the influences of key factors on the new system performance,and proposes different operation strategies.The results show that under the design conditions,the electricity efficiency and exergy efficiency of the new system are 62.28%and 64.92%,respectively.Compared with the reference SOFC-GT-KC system without integrating with solar thermochemical process under the same conditions,the output power of the new system is increased by 31.90%and the exergy efficiency is increased by 2.77 percentage points.Under design conditions,with the same electric power output,the new system saves 29.6%fossil fuel than that of the reference system.

关 键 词：太阳能 制氢 热化学储能 燃料电池 梯级利用 

分 类 号：TK91[动力工程及工程热物理]