Effect of Chemical Impurities on Centrifugal Machine Performance: Implications for Compressor Sizing In A CO 2 Transport Pipeline

Health monitoring system for the 10 MW Supercritical Carbon Dioxide S-CO2 Gas Turbine Power Plant

“…a few percent for efficiency). After taking pressure quality, temperature and mass flow measurements, the next step is to determine the actual and ideal enthalpy changes [94,95]. The effect of these impurities on the main compressor power requirements is critically important, as they affect the working fluid concentration and can cause severe changes in the power requirements of the compressor Equation 4.6.…”

“…To achieve and maintain market competitiveness, availability, higher cycle efficiency and lower cycle costs are required. Decline in fluid angular momentum will lead to drop in compressor outlet pressure Equation 4.35 [95,100]. The type and concentration of the impurity in the CO 2 stream have great impact on the compressor performance and in turns overall cycle efficiency.…”

“…It is obvious that for a given rotor speed, the N 2 impurity in the CO 2 causes the greatest reduction in the main compressor discharge pressure. This can be attributed to the severe reduction in the overall fluid density [95] because sharp contrast between molar mass of N 2 to CO 2 . As main compressor work is inversely proportional to the working fluid density, it is clear that diverse types of impurities have different effects on additional cycle efficiency reduction.…”

“…As with all type of turbines, S −CO 2 gas turbine efficiency is directly influenced by the condition of the working fluid at the turbine inlet, as well as pressure and temperature which are related to enthalpy differences. Impurities can cause the two phase region which can lead to cavitation that may potentially damage the main compressor [95].…”

“…Due to the high inlet temperature of fluid going to the cooler, fluid property differences in the cooler can either increase or decrease the rate of heat transfer and alter the pinch point of the cooler, which affects main compressor per-formance as it is always running in the off design condition. This is an important consideration, as it can prevent potentially damaging to the main compressor [16,95]. [96].…”