Compressor

Compressor - ME 416 Computer Assisted Design of Thermal...

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ME 416 Computer Assisted Design of Thermal Systems Actual Compressor Calculations 1. Use guidelines for ideal gas turbomachinery to calculate ideal specific work and power. 2. Calculate volume flow rate in cubic feet per minute at the compressor inlet 3. Use the Brake Horsepower for a Generic Centrifugal Compressor graph to determine the basic brake horsepower. 4. Calculate the actual power by multiplying the basic brake horsepower by the ratio of the inlet pressure (in psig) to 14.5. This will give actual power in units of horsepower. You may wish to convert it to watts. 5. Calculate the actual specific work by dividing the actual power (in W) by the mass flow rate (in kg). 6. Calculate the actual adiabatic efficiency from η s ideal act ideal act = w w or W W ± ² ³ ´ µ 7. Determine the actual exit conditions by first calculating the actual exit enthalpy from h = h + w out,act in act and then using property evaluation to determine the actual exit entropy and temperature. 8. Calculate any second law parameters (such as irreversibility or reversible work)

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Compressor - ME 416 Computer Assisted Design of Thermal...

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