eprintid: 12675
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/26/75
datestamp: 2023-11-10 03:27:14
lastmod: 2023-11-10 03:27:14
status_changed: 2023-11-10 01:49:15
type: article
metadata_visibility: show
creators_name: Haroon, M.
creators_name: Sheikh, N.A.
creators_name: Ayub, A.
creators_name: Tariq, R.
creators_name: Sher, F.
creators_name: Baheta, A.T.
creators_name: Imran, M.
title: Exergetic, economic and exergo-environmental analysis of bottoming power cycles operating with CO2-based binary mixture
ispublished: pub
keywords: Binary mixtures; Carbon dioxide; Economic analysis; Efficiency; Environmental impact; Exergy; Sustainable development; Thermoanalysis; Working fluids, Comparative analysis; Cycle pressure ratios; Environmental analysis; Levelized cost of electricities; Maximum power output; Minimum temperatures; Mixture working fluids; Thermo dynamic analysis, Bottoming cycle systems
note: cited By 8
abstract: This study focused on investigating the bottoming power cycles operating with CO2-based binary mixture, taking into account exergetic, economic and exergo-environmental impact indices. The main intent is to assess the benefits of employing a CO2-based mixture working fluid in closed Brayton bottoming power cycles in comparison with pure CO2 working fluid. Firstly, selection criteria for the choice of suitable additive compound for CO2-based binary mixture is delineated and the composition of the binary mixture is decided based on required cycle minimum temperature. The decided CO2-C7H8 binary mixture with a 0.9 mole fraction of CO2 is analyzed in two cycle configurations: Simple regenerative cycle (SRC) and Partial heating cycle (PHC). Comparative analysis among two configurations with selected working fluid are carried out. Thermodynamic analyses at varying cycle pressure ratio shows that cycle with CO2-C7H8 mixture shows maximum power output and exergy efficiency at rather higher cycle pressure ratio compared to pure CO2 power cycles. PHC with CO2-C7H8 mixture shows 28.68 increment in exergy efficiency with the levelized cost of electricity (LCOE) 21.62 higher than pure CO2 PHC. Whereas, SRC with CO2-C7H8 mixture shows 25.17 increment in exergy efficiency with LCOE 57.14 higher than pure CO2 SRC. Besides showing lower economic value, cycles with a CO2-C7H8 mixture saves larger CO2 emissions and also shows greater exergo-environmental impact improvement and plant sustainability index. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
date: 2020
publisher: MDPI AG
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092786950&doi=10.3390%2fen13195080&partnerID=40&md5=9681ba5b989d5dbde5ec681d1f69c892
id_number: 10.3390/en13195080
full_text_status: none
publication: Energies
volume: 13
number: 19
refereed: TRUE
issn: 19961073
citation:   Haroon, M. and Sheikh, N.A. and Ayub, A. and Tariq, R. and Sher, F. and Baheta, A.T. and Imran, M.  (2020) Exergetic, economic and exergo-environmental analysis of bottoming power cycles operating with CO2-based binary mixture.  Energies, 13 (19).   ISSN 19961073