Electric power generation technology of natural gas pressure reduction:Insights from black box-gray box hierarchical exergy analysis and evaluation method  

作　　者：Zhi-Dong Li Qing-Lin Cheng You-Wang Chen Jiang-Dong Wei Li-Li Lv Hao Wu Yang Liu 

机构地区：[1]Key Lab of Ministry of Education for Enhancing the Oil and Gas Recovery Ratio,Northeast Petroleum University,Daqing 163318,China [2]PetroChina Planning&Engineering Institute(CPPEI),Beijing 100000,China

出　　处：《Petroleum Science》2022年第1期329-338,共10页石油科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(52074089 and 51534004);Natural Science Foundation of Heilongjiang Province of China(LH2019E019)。

摘　　要：Based on the“three box”exergy analysis model,a black box-gray box hierarchical exergy analysis and evaluation method is put forward in this paper,which is applied to evaluate the power generation technology of differential pressure produced by natural gas expansion.By using the exergy analysis theory,the black box-gray box hierarchical exergy analysis models of three differential pressure power generation technologies are established respectively.Firstly,the“black box”analysis models of main energy consuming equipment are established,and then the“gray box”analysis model of the total system is established.Based on the calculation results of exergy analysis indexes,the weak energy consumption equipment in the whole power generation process is accurately located.Taking a gas field in southwest China as an example,the comprehensive energy consumption evaluation of the three power generation technologies is carried out,and the technology with the best energy consumption condition among the three technologies is determined.Finally,the rationalization improvement measures are put forward from improving the air tightness,replacing the deflector and reducing the flow loss.

关 键 词：Expansion differential pressure power generation Black box-gray box hierarchy Exergy analysis method Weak link of energy consumption 

分 类 号：TM619[电气工程—电力系统及自动化]