the cost of electricity is $0.070/kW/h. 1. Saturated water vapor enters a steady-state compressor at 1 bar. Estimate the annual electric cost of the power required to compress 3 kg/s of this vapor to P = 10 bar and T = 400oC. 2. Saturated liquid water enters a steady-state pump at 1 bar. Estimate the annual electric cost of the power required to pump 3 kg/s of this liquid to P = 10 bar. Estimate the temperature of the exiting liquid.
When I teach design, one of the important items the students need to be aware of is that it is the difference in cost between pumping a liquid and compressing a gas. Let's explore this by comparing adiabatic pumps and compressors. Note that, in Missouri, the cost of electricity is $0.070/kW/h.
1. Saturated water vapor enters a steady-state compressor at 1 bar. Estimate the annual electric cost of the power required to compress 3 kg/s of this vapor to P = 10 bar and T = 400oC.
2. Saturated liquid water enters a steady-state pump at 1 bar. Estimate the annual electric cost of the power required to pump 3 kg/s of this liquid to P = 10 bar. Estimate the temperature of the exiting liquid.
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