1. A wastewater treatment plant discharges 100 gal/min of treated water through a 0.25 m diameter steel pipe. Estimate the fold change in pumping cost if this steel pipe is replaced with a 0.2 m diameter smooth plastic pipe

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.