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.

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

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