You want to compress air from 1 atm, 70☏, to 2000 psig, using a staged compressor with interstage cooling to 70☏. Note: cp = 7Btu/(lb mol☏) assume ideal gas.ģ8. (d) Calculate the gas exit temperature for cases (b) and (c). (c) adiabatic three stage compression with interstage cooling to 70☏ and optimum interstage pressures. Calculate the total horsepower required if the compressor efficiency is 80% for It is desired to compress 1000 scfm of air from 1 atm and 70☏ to 10 atm. (e) Calculate the final temperature of the gas for cases (b), (c), and (d).ģ7. Determine the expression relating the pressure ratio and inlet temperature for each stage for this case by induction from the corresponding expression for optimum operation of the corresponding two stage case. (d) A three stage 80% efficient adiabatic compressor with interstage cooling to 120☏. (c) A five stage 80% efficient adiabatic compressor with interstage cooling to 70☏. (b) A single stage 80% efficient adiabatic compressor. (a) A single stage 80% efficient isothermal compressor. Calculate the work required to do this per pound of air using the following methods: Air is to be compressed from 1 atm and 70☏ to 2000 psia. (c) Adiabatic two stage compressor with interstage cooling to 100☏.ģ6. (b) Adiabatic three stage compressor with interstage cooling to 70☏. Calculate the work required to do this per pound of gas in a 100% efficient compressor under the following conditions: You have a requirement to compress natural gas (k = 1.3, MW = 18) from 1 atm and 70☏ to 5000 psig. (c) A four stage adiabatic compressor with no intercooling, assuming the same interstage pressures as in (b) and 100% efficiency.ģ5. (b) A four stage adiabatic compressor with interstage cooling to 80☏ and optimum interstage pressures. (a) A single stage isothermal compressor. Assuming ideal gas behavior, calculate the compression work required per pound of ethylene under the following conditions: It is desired to compress ethylene gas from 1 atm and 80☏ to 10,000 psia. Calculate the outlet temperature of the air for cases (b), (c), and (d), above. (d) Three stage adiabatic compression with interstage cooling to 120☏ and optimum interstage pressures. (c) Five stage adiabatic compression with intercooling to 70☏ and optimum interstage pressures. Calculate the work per pound of gas required to compress air from 70☏ and 1 atm to 2000 psi with an 80% efficient compressor under the following conditions:
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