Imperial College London
Alternate

ProfessorChristosMarkides

Faculty of Engineering, Department of Chemical Engineering

Professor of Clean Energy Technologies
 
 
 
//

Contact

 

+44 (0)20 7594 1601c.markides Website

 
 
//

Location

 

404ACE ExtensionSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@inbook{Lee:2023:10.1016/B978-0-12-818022-8.00008-9,
author = {Lee, JI and Song, J and Markides, CN},
booktitle = {Power Generation Technologies for Low-Temperature and Distributed Heat},
doi = {10.1016/B978-0-12-818022-8.00008-9},
pages = {163--206},
title = {CO<inf>2</inf> cycles},
url = {http://dx.doi.org/10.1016/B978-0-12-818022-8.00008-9},
year = {2023}
}
Download

RIS format (EndNote, RefMan)

TY  - CHAP
AB  - CO2-based (both transcritical and supercritical) cycle systems have emerged as a promising option for power generation thanks to their robust thermodynamic performance as well as advantages offered by CO2 as a working fluid, which is nontoxic, nonflammable, and robust to decomposition at high-temperature conditions. Good thermodynamic performance in these systems is promoted by the good thermal match that can be achieved between the cycle and heat source(s), again as a consequence of the thermodynamic properties of CO2. Heat from fossil-fuel combustion as well as solar, geothermal, biomass heat and waste-heat recovery are all potential application areas for CO2 cycle systems, covering heat-source temperatures over a wide range from 300°C to 1200°C, with a thermodynamic efficiency of 20%–65%. When the turbine inlet temperature is ~500°C the thermal efficiency of supercritical (s-CO2) cycle systems reaches ~30%, but a thermal efficiency of 60% can be achieved when the turbine inlet temperature reaches 1200°C. Moreover the high density of CO2 in the supercritical region allows compact component and system design, which is particularly advantageous in space-limited applications. Although the technology has not yet been deployed widely, economic performance projections of s-CO2 cycle systems have been performed. A variety of such assessments have predicted that (1) the specific investment cost of s-CO2 cycle systems will fall in the range 900–1650$/kW in waste-heat recovery applications, (2) the levelized cost of energy (LCOE) of coal-fired CO2 power plants can be as low as ~70–90$/MWh, (3) the unit cost of electricity of s-CO2 cycle systems in solar applications can reach 0.07–0.09$/kWh, and (4) a total cost saving of up to 30% can be achieved by CO2 cycle systems relative to steam Rankine cycle systems. Research on CO2 cycle systems is extensive and spans diverse areas from component (especially turbomachine and heat exchanger) d
AU  - Lee,JI
AU  - Song,J
AU  - Markides,CN
DO  - 10.1016/B978-0-12-818022-8.00008-9
EP  - 206
PY  - 2023///
SN  - 9780128182376
SP  - 163
TI  - CO<inf>2</inf> cycles
T1  - Power Generation Technologies for Low-Temperature and Distributed Heat
UR  - http://dx.doi.org/10.1016/B978-0-12-818022-8.00008-9
ER  -
Download