A new heat supply strategy for CO2 capture process based on the heat recovery from turbine exhaust steam in a coal-fired power plant

Liheng Guo, Yudong Ding, Qiang Liao, Xun Zhu and Hong Wang

Energy, 2022, vol. 239, issue PA

Abstract: A new heat supply strategy for the CO2 capture process based on the heat recovery from turbine exhaust steam was proposed and evaluated. A water-steam cycle, a CO2 capture unit, a CO2 compression unit, and an enhanced two-stage heat pump were simulated for a 600 MW coal-fired power plant using Aspen Plus. Effects of the working medium, the exhaust pressure of the turbine, and reboiler temperature on the heat pump efficiency were studied. The integrated configurations were simulated and the effects of reboiler duty, exhaust steam pressure, and reboiler temperature on the thermodynamic performance of the plant station were discussed. Results indicated that the utilization of internal heat exchangers improved effectively the coefficient of performance (COP) of the two-stage heat pump by 13.3–22.0%; the heat pump recovered effectively the latent heat of exhaust steam, and a lower CO2 desorption temperature would significantly contribute to a higher COP of the heat pump system and greater thermodynamic performance of the proposed integrated configuration with heat pump. A net electric efficiency penalty of 7.07% and a fuel utilization efficiency of 51.58% were obtained when the reboiler temperature was 90 °C.

Keywords: Coal-fired power plant; CO2 capture; Heat pump; Exhaust steam heat recovery; System integration (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S036054422102065X
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:239:y:2022:i:pa:s036054422102065x

DOI: 10.1016/j.energy.2021.121817

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 ().