摘要
为了分析预压缩式超临界CO_2(S-CO_2)布雷顿循环的性能,建立了预压缩式S-CO_2布雷顿循环的分析模型,分析了系统关键参数对再循环效率的影响并阐述了具体影响机理,对循环的最佳压比及最佳预压缩压力进行了计算,并开展了预压缩循环与再压缩循环的对比分析。结果表明:预压缩循环的效率与预压缩压力有关,且存在一个最佳预压缩压力使得循环效率达到最高;预压缩循环的效率随着循环最低温度的升高而降低,随着循环最高温度以及最高压力的升高而提高;在相同条件下,预压缩循环的效率较再压缩循环稍高,但优势不明显。
To analyze the performance of a pre-compression S-CO2 Brayton cycle, a mash model was set u based on which, the effect of key cycle parameters on the cycle efficiency was studied, the influenci mechanism was explored, the optimum pressure ratio and pre-compression pressure were calculated, wh a comparison was made between the pre-compression and re-compression S-CO2 Brayton cycle. Resu show that the cycle efficiency is related to the pre-compression pressure, and there exists an optimal precompression pressure, when highest cycle efficiency could be achieved. The cycle efficiency reduces with the rise of minimum cycle temperature, which increases with the rise of maximum temperature and pressure. Under same conditions, the efficiency of the pre-compression S-CO2 Brayton cycle is slightly higher than that of the re-compression S-CO2 Brayton cycle, but the difference is not obvious.
作者
王兵兵
乔加飞
WANG Bingbing;QIAO Jiafei(Shenhua Guohua （Beijing） Electric Power Research Institute Co. , Ltd. , Beijing 100025, China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2018年第5期412-417,共6页
Journal of Chinese Society of Power Engineering
基金
国家科技支撑计划资助项目(2015BAA05B02)
