Energy, exergy, environmental, and economic analyses and multiobjective optimization of a DSORC system for waste heat utilization in low-concentration gas power generation

Shujuan Bu, Xinle Yang, Weikang Li, Wenzhi Dai, Chang Su, Xin Wang, Xunan Liu, Ning Yu and Guanyu Wang

Energy, 2024, vol. 286, issue C

Abstract: This paper proposes a dual-loop ORC system with working fluid shunting (DSORC) for waste heat recovery from low-concentration gas power generation. Thermodynamic models based on pinch points position changes, environmental models based on life cycle assessment, and economic models are established to analyze energy, exergy, environmental, and economic performances of the DSORC system. Multiobjective optimization is performed by GA to reveal the best performance. The results show that the thermodynamic performance of the DSORC system is better than that of the DORC system, and the exergy destruction is smaller in the evaporative condenser, low-temperature evaporator, and low-temperature preheater of the DSORC system. The proportions of ADP and GWP are large in the weighted environmental potential of the DSORC system. The weighted environmental potential generated by the operating process is more than 97 %, but the steel consumption per unit of power generation is the most sensitive to the environmental impact. The optimal P6 is close to the maximum P6 that can be achieved for each working fluid, the optimal P2 ranges from 9.92 MPa to 10.99 MPa, and the optimal P3 ranges from 0.22 MPa to 0.23 MPa.

Keywords: Waste heat from low-concentration gas power generation; Position of pinch points in a heat exchanger; Life cycle assessment; 4E analyses; Multiobjective optimization (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544223030414
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:286:y:2024:i:c:s0360544223030414

DOI: 10.1016/j.energy.2023.129647

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().