Abstract
The world community is worried about the effects of global warming. A few agreements on the reduction of CO2 emissions have been signed recently. A large part of these emissions is produced by the power production industry. Soon, the requirements for thermal power plant ecology and efficiency performance may become significantly higher. Thus, the contemporary problem is the development of highly efficient power production facilities with low toxic and greenhouse gas emission. An efficient way to reduce CO2 emissions into the atmosphere, which implies maintaining economic growth, is the creation of closed thermodynamic cycles with oxy-fuel combustion. The Allam cycle is one of the most promising among oxy-fuel power plants. A 50 MW pilot Allam cycle plant was built in Texas. The design for a commercial system with an electrical output of 300 MW is under development. This work is devoted to the improvement of the efficiency and environmental safety of oxy-fuel combustion power cycles via the utilization of compressed working fluid heat. The results of computer simulation obtained using AspenONE software demonstrated that an additional circuit in the multi-flow regenerator might increase net efficiency by 3.5%. Besides this, the incorporation of a supercritical carbon dioxide (S–CO2) Brayton cycle with recompression increased the efficiency by 0.2%. Therefore, the maximum net efficiency of the prospective power unit was 51.4%.
Highlights
Available power and the growth rate of electricity production are important factors in economic development
In oxy-fuel combustion power cycles operating on super-critical carbon dioxide, cer
In oxy-fuel combustion power cycles operating on super-critical carbon dioxide, certain sources of low-potential heat are available
Summary
Available power and the growth rate of electricity production are important factors in economic development. Renewable power sources have grown rapidly, but the majority of heat and electricity are still produced by the combustion of organic fuels. This tendency will probably remain, for technical and financial reasons [1,2]. The key elements of the prospective power generation technology are an oxy-fuel combustion chamber and carbon dioxide capture and storage (CCS) systems. Reviews of the different oxy-fuel combustion power cycles have shown that the most effective is the Allam cycle [6,7,8]. Its net efficiency could be above 50% [9,10]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
