Aplant’s demand and power factor are 800 kw and 0.80 respectively for six months per year, and 700 kw and 0.85 respectively for the other six months per year. if demand costs $18 /kva-month, determine the quantity of capacitance to maximize savings without over-correcting for power factor, and the annual savings from adding this quantity of capacitance.

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater