An uninsulated air compressor is to compress 0.10 kg/s of at from 100 kPa and 20°C to 900 kPa and 330°C. Using your compressor model, determine the power requirement for this pr°Cess for heat transfer rates ranging from -2.0 kW to -10.0 kW.
Given: P1 = 100 kPa; T1 = 20°C; T2 = 330°C; P2 = 900 kPa; m?=0.1 kg/s
Air (Take State 1 as the inlet, State 2 as the outlet.)
Assume: For a compressor, assume steady-state, steady-flow, single-inlet, single-outlet flow, with ?KE = ?PE = 0
What will be an ideal response?
With these assumptions, the First Law for open systems reduces to W?=m?(h1?h2)+Q?
As the temperature change can get large, we will consider the specific heats of the air to be variable.
h1 = 293.17 kJ/kg
h2 = 610.17 kJ/kg
The power is a function of heat transfer rate.
The resulting power requirement plot is
Note, more heat loss results in more power consumption.
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What will be an ideal response?
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