CRAFT Tech’s Dr. Ashvin Hosangadi will be presenting at The 6th International Supercritical CO2 Power Cycles Symposium: March 27-29, 2018. The topic of his talk is: “Numerical Simulations of CO2 Compressors: Subcritical Inlet Conditions.” A generalized numerical framework to model phase change at subcritical conditions in CO2 over a wide range of conditions has been developed at CRAFT Tech. This framework is used to model compressor performance for conditions that span near critical to sub-critical conditions within the saturation dome
A generalized numerical framework to model phase change at subcritical conditions in CO2 over a wide range of conditions is presented in this paper. This model is implemented with an advanced numerical framework that features independent mass transport equations for liquid and vapor CO2, and can also be extended to include contaminants. A table look-up procedure based on the NIST database was implemented for both supercritical and subcritical conditions. A key contribution here is the extension of the look-up procedure to subcritical conditions using saturation curves as bounding lines to distinguish between liquid and vapor properties. Phase change is triggered by the difference between the local values of pressure and saturation pressure and do not require the phase change physics (i.e. condensation or vaporization) to be specified apriori.
The 6th International Supercritical CO2 Power Cycles Symposium
March 27 – 29, 2018, Pittsburgh, Pennsylvania