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The 4th International Symposium – Supercritical CO2 Power Cycles September 9-10, 2014, Pittsburg, Pennsylvania system produces 8445 kW of cooling power or about 2401 tons of refrigeration. The corresponding refrigeration power rating is 1.05 – 1.3 kWe/ton-refrig to make ice. The waste heat rejection in the refrigeration loop is performed at temperatures that vary from 300 K (26.8 C) up to 359.2 K (86 C). The high temperature of heat rejection means that most of the heat rejection can be performed with dry air, but the requirement to cool the CO2 to 300 K (26.8 C) requires a cold climate, or water obtained from an evaporative cooler. Table 3: Summary performance data for the S CO2 transcritical refrigeration cycle. CO2 REFRIGERATION EXPANSION VALVE Temperature (K) Pressure (kPa) Fluid Type Mass Flow Rate (kg/s) TURBINE EXPANDER Mass Flow Rate (kg/s) Compr Pwr (kW) Net Elect Pwr (kWe) CO2 CO2 268.2 3046 50.14 47.7 2841 na 3135.05 CO2 CO2 359.2 9138 50.138 CO2 300.0 8986 268.5 3071 CO2 50.138 50.138 Temperautre (K) Pressure (kPa) 268.2 3046 359.2 9138 300.0 8986 268.5 3071 Fluid Type CO2 CO2 47.7 47.7 a) Temperature and Pressure of CO2 Refrigeration: eff.comp=.80 , eff.turb=.85 2703.21 47.7 CO2 REFRIGERATION COP (Cycle) COP (Net) Turbine Pwr (kW) 409.95 2524.81 Heat Reject -Hot (kWth) Evap Cooling ICE Gen (kWth) Mass Flow Rate Pressure Ratio 11323 8445 50.14 3.00 10773 8445.5 47.70 3.00 b) Summary performance parameters for SCO2 transcritical refrigeration cycles. Expansion Valve 2.973 2.694 Turbo Expander 3.683 3.345 8 1r Comp Inlet 2r Comp Out 3r CO2 Hot Gas Chiller Exit 4r Expansion Valve Turbine ExitPDF Image | Bulk Energy Storage using a Supercritical CO2 Waste Heat Recovery Power Plant
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