Study on an energy-saving process for separation ethylene elycol mixture through heat-pump, heat-integration and ORC driven by waste-heat

Lili Wang, Jun Zhao, Junfeng Teng, Shilong Dong, Yinglong Wang, Shuguang Xiang and Xiaoyan Sun

Energy, 2022, vol. 243, issue C

Abstract: Energy-saving separation processes of Ethylene Glycol (EG) driven by waste heat were investigated. These are basic separation process (BSP) and separation process (SEP) with waste heat recovery (WHRSP). Electricity and heat from waste heat recovery (WHR) were generated for supplying separation system. The optimal operating parameters of each process were determined by the minimum total annual cost (TAC). The optimal process was studied by through multi-objective analysis-based exergy, environment and economy performance. The result of exergy analysis indicated that exergy loss of SEP was 1811.40 kW, which 26.38% lower than that of BSP. The environment analysis showed that compared with the benchmarked BSP process, the emissions and emission costs of WHRSP are significantly reduced by about 32.69%. The results of economic analysis showed that TAC of BSP and WHRSP are 2.05ⅹ106 $/y, 1.41ⅹ106 $/y. TAC of the WHRSP process was 31.54% lower than that of the benchmarked BSP. The WHRSP shows the high energy efficiency, low economy cost and low exergy loss with a great industrial application prospect when compared to the benchmarked process.

Keywords: Thermodynamic analysis; Waste heat recovery; Energy-saving process; Environment and economy performance (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221032345
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:243:y:2022:i:c:s0360544221032345

DOI: 10.1016/j.energy.2021.122985

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 ().