文献类型：期刊文献

英文题名：Heat integration, simultaneous structure and parameter optimisation, and techno-economic evaluation of waste heat recovery systems for petrochemical industry

作者：Ding, Yuxing[1,3];Liu, Yurong[1,4];Wang, Meihong[3,4];Du, Wenli[1,2,4];Qian, Feng[2,4]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Engn Res Ctr Proc Syst Engn, Minist Educ, Shanghai 200237, Peoples R China;[3]Univ Sheffield, Dept Chem & Biol Engn, Sheffield S1 3JD, England;[4]East China Univ Sci & Technol, Key Lab Smart Mfg Energy Chem Proc, Minist Educ, Shanghai 200237, Peoples R China

年份：2024

卷号：296

外文期刊名：ENERGY

收录：;EI(收录号：20241515866549);WOS:【SCI-EXPANDED(收录号:WOS:001224707000001)】；

基金：This work was supported by National Key Research & Development Program-Intergovernmental International Science and Technology Innovation Cooperation Project (2021YFE0112800) , Shanghai Com- mittee of Science and Technology, China (Grant No.22DZ1101500) , National Natural Science Foundation of China (62273149, 62373153) and Fundamental Research Funds for the Central Universities. The au- thors would also like to acknowledge the financial support of the EU RISE project OPTIMAL (Ref 101007963) .

语种：英文

外文关键词：Process optimisation; Heat integration; Heat exchanger network; Organic Rankine cycle; Petrochemical plant; Techno-economic evaluation

摘要：Energy conservation in the petrochemical sector holds the key to its financial viability. The pervasive application of Heat Exchanger Networks (HEN) exemplifies the industry's efforts in heat recovery. Yet, despite its widespread adoption, an alarming quantum of low-grade heat remains squandered, underscoring the potential for augmenting energy savings through more effective utilization of this heat. Recognizing the pivotal role of the synergistic interaction between the process and the heat recovery system in maximizing energy retrieval, an innovative approach is proposed. This methodology initially entailed the development of a process model and an enhanced heat recovery system, the latter embodying the integration of an organic Rankine cycle (ORC) with HEN. Subsequently, a strategic diagnostic was proposed to incorporate these sub-systems into a cohesive, optimisation framework. Following this, an array of energy, exergy, and economic analyses were conducted to appraise the system's performance. The findings suggest a considerable improvement in heat recovery and an amplification in ORC efficiency from a mere 7.64%-11.38%. The enhanced heat recovery further translated into a reduced need for cold utility, thereby minimizing cooler deployment. Given the substantial exergy destruction associated with coolers, their lesser usage bolstered the system's exergy efficiency. Moreover, the optimised ORC manifested in heightened net power generation, consequently elevating electricity revenues. Despite a nominal surge in equipment costs, the aggregate profit witnessed a substantial hike from 165.19 M$/year to 178.79 M $/year. The proposed system substanitally improved thermodynamic and economic performance. This study offers valuable guidance for the design and operation of petrochemical industries, serving as a roadmap to energy conservation and enhanced profitability.