Ammonia is being absorbed in a tower using pure water at 25 °c and 1.0 atm abs pressure. the feed rate is 1440 ibm/h and contains 3.0 mol% ammonia in air. liquid to gas mass flow rate gl/gg= 2/1 and use of 1-in metal pall rings.

a) calculate the pressure drop in the packing and gas mass veplocity at flooding. using 50% of the flooding velocity, calculate the pressure drop, gas and liquid flows, and tower diameter.

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

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux

Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.