Question

In: Mechanical Engineering

12.2 Compression of Carbon Dioxide Carbon dioxide (CO2) at 1 bar and 300 K enters a...

12.2 Compression of Carbon Dioxide

Carbon dioxide (CO2) at 1 bar and 300 K enters a compressor operating at steady state and is compressed adiabatically to an exit state of 10 bar and 520 K. The CO2 is modelled as an ideal gas, and the KE and PE effects are negligible. For the compressor, determine

a) Work input [kJ/kg]

b) Rate of entropy production [kJ/kg?K]

c) The isentropic compressor efficiency

d) T-s diagram of isentropic and real process

Solutions

Expert Solution


Related Solutions

Carbon dioxide (CO2) at 1 bar, 300 K enters a compressor operating at steady state and...
Carbon dioxide (CO2) at 1 bar, 300 K enters a compressor operating at steady state and is compressed adiabatically to an exit state of 10 bar, 540 K. The CO2 is modeled as an ideal gas, and kinetic and potential energy effects are negligible. For the compressor, determine: (a) the work input, in kJ per kg of CO2 flowing, (b) the rate of entropy production, in kJ/K per kg of CO2 flowing, and (c) the percent isentropic compressor efficiency.
Nitrogen (N2) at 1 bar, 300 K enters a compressor operating at steady state and is...
Nitrogen (N2) at 1 bar, 300 K enters a compressor operating at steady state and is compressed adiabatically to an exit state of 16 bar, 750 K. The N2 is modeled as an ideal gas and kinetic and potential energy effects are negligible. Determine the work input, in kJ per kg of N2 flowing, the rate of entropy production, in kJ/K per kg of N2 flowing, and the isentropic compressor efficiency.
Nitrogen (N2), at 300 K, 1 bar with a mass flow rate of 1 kg/s enters...
Nitrogen (N2), at 300 K, 1 bar with a mass flow rate of 1 kg/s enters an insulated mixing chamber and mixes with carbon dioxide (CO2) entering as a separate stream at 500 K, 1 bar with a mass flow rate of 0.5 kg/s. The mixture exits at 1 bar. Assuming ideal gas behavior, for steady-state operation, determine (a) the molar analysis (i.e., the molar flow rate for each gas) of the exiting mixture, (b) the exit mixture temperature, and...
Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric...
Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric flow rate of 48 m3/min and exits at 12 bar, 400 K. Heat transfer occurs at a rate of 8 kW from the compressor to its surroundings. Assuming the ideal gas model for air and neglecting kinetic and potential energy effects, determine the power input, in kW.
How many GRAMS of carbon are present in 4.00 moles of carbon dioxide, CO2? How many...
How many GRAMS of carbon are present in 4.00 moles of carbon dioxide, CO2? How many MOLES of oxygen are present in 3.11 grams of carbon dioxide? How many GRAMS of oxygen are present in 9.82×10^22 molecules of tetraphosphorus decaoxide?
The amount of carbon dioxide in a gaseous mixture of CO2 and CO can be determined...
The amount of carbon dioxide in a gaseous mixture of CO2 and CO can be determined by passing the gas into an aqueous solution that contains an excess of Ba(OH)2, The CO2 reacts, yielding a precipitate of BaCO3, but eh CO does not react. This method was used to analyze the equilibrium compostion of the gas obtained when 1.77 g of CO2 reacted with 2.0 g of graphite in a 1.000 L container at 1100 K. The analysis yielded 3.41...
1. Butane, C4H10, reacts with oxygen, O2, to form water, H2O, and carbon dioxide, CO2, as...
1. Butane, C4H10, reacts with oxygen, O2, to form water, H2O, and carbon dioxide, CO2, as shown in the following chemical equation: 2C4H10(g)+13O2(g)→10H2O(g)+8CO2(g) Calculate the mass of butane needed to produce 71.5 g of carbon dioxide. 2. For the reaction, calculate how many grams of the product form when 22.4 g of Ca completely reacts. Assume that there is more than enough of the other reactant. Ca(s)+Cl2(g)→CaCl2(s) 3. For the reaction, calculate how many grams of the product form when...
Air is compressed adiabatically in a piston–cylinder assembly from 1 bar, 300 K to 8 bar,...
Air is compressed adiabatically in a piston–cylinder assembly from 1 bar, 300 K to 8 bar, 600 K. The air can be modeled as an ideal gas and kinetic and potential energy effects are negligible. Determine the amount of entropy produced, in kJ/K per kg of air, for the compression. What is the minimum theoretical work input, in kJ per kg of air, for an adiabatic compression from the given initial state to a final pressure of 8 bar? Note...
Air is compressed adiabatically in a piston–cylinder assembly from 1 bar, 300 K to 4 bar,...
Air is compressed adiabatically in a piston–cylinder assembly from 1 bar, 300 K to 4 bar, 600 K. The air can be modeled as an ideal gas and kinetic and potential energy effects are negligible. Determine the amount of entropy produced, in kJ/K per kg of air, for the compression. What is the minimum theoretical work input, in kJ per kg of air, for an adiabatic compression from the given initial state to a final pressure of 4 bar? Note...
Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2...
Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the equilibrium equation.The acid dissociation constants listed in most standard reference texts for carbonic acid actually apply to dissolved CO2. For a CO2 partial pressure of 3.2×10–4 bar in the atmosphere, what is the pH of water in equilibrium with the atmosphere? (For carbonic acid Ka1 = 4.46× 10–7 and Ka2 = 4.69× 10–11).
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT