A Semiclosed Cycle Gas Turbine With Carbon Dioxide-Argon as Working Fluid

Abstract

This paper describes the performance analysis of a semi closed cycle gas turbine. The working fluid is carbon dioxide and the fuel is low heating value gas synthesised from coal. The objective of the machine is to produce clean electricity with the smallest efficiency penalty. Firstly the thermodynamic properties of the gases in the cycle were obtained as a function of temperature and pressure. Then two performance simulation codes were developed. These have the ability of simulating different configurations of open, closed and semi-closed cycles. The first code was used for cycle optimisation and the second for off-design studies. The design and off-design performance of the machine are predicted. The production of clean electricity will be at the expense of a lower efficiency compared with current equipment. Finally, some critical issues for the development of such a gas turbine are identified.

Oxyfuel combustion for CO2 capture in power plants

“…Further purification of the CO 2 is not investigated in detail by most of the studies and they only consider the energy necessary for compression from atmospheric pressure to pipeline conditions. Ulizar and Pilidis (1997) describe an SCOC-CC with a pressure ratio of 60 in which all of the recycle is compressed and the flue gas is split at high pressure reducing the need for compression to storage. Shao et al (1995) show a highly integrated system of ASU and CPU for an SCOC-CC.…”

Performance analysis of hybrid systems incorporating high temperature fuel cells and closed cycle heat engines at part-load operation

“…So far, different authors have approached the simulation of this turbomachinery based on the well founded thermodynamic and aerodynamic principles that are commonly used to design air compressors and gas or steam turbines [11,12]. Nevertheless, this is not correct when applied to supercritical CO 2 systems as noted by some works in the subject [13,14]. The markedly non-ideal behaviour of carbon dioxide near the critical point brings about the need to develop a specific database on which an efficient design of the compressor (and to a lesser extent the turbine) can rely.…”

CO2 Emission Abatement in IGCC Power Plants by Semiclosed Cycles: Part A — With Oxygen-Blown Combustion

“…-Coal gasification followed by catalytic shift, producing CO 2 and H2 from CO and 1120: CO2 can be therefore separated by relatively low-cost physical absorption systems before being ducted to the gas turbine, which essentially uses hydrogen as fuel (Schatz et al, 1992, Chiesa andConsonni, 1998). -Cycles using enriched CO 2 mixtures as working fluid, usually employing pure oxygen as oxidizer: in this case, after condensation of water produced by combustion, the remaining working fluid is essentially carbon dioxide which can be easily removed and disposed (De Ruyck, 1992, Mathieu and DeRuyck, 1993, Ulizar and Pilidis, 1996, Chiesa and Lozza, 1997b. Oxygen combustion can be also applied to conventional boilers (Nakayama et al, 1992).…”