Analysis of compression/expansion processes in zero-emission power carbon dioxide cycle based on non-ideal gas model

The new high performance and no releasing pollutants CO2 power MATHIANT cycle, operates within the pressure range 1 - 300 bar (4). The paper is concerned with some aspects of CO2 compression/expansion processes. The thermodynamic and flow processes in high-pressure units of CO2 compressor and turbine are strongly affected by real gas phenomena, especially in the supercritical region. For the assumed pressure ratios, polytropic efficiencies, cooling and mass flows in each stage it is possible to obtain the final state parameters, compression/expansion work and other performance characteristics based on the real gas model CO2 properties obtained from Altunin's virial EOS.