Aprocess fluid having a specific heat of 3500 j/kg · k and flowing at 2 kg/s is to be cooled from 80°c to 50°c with chilled water, which is supplied at a temperature of 15°c and a flow rate of 2.5 kg/s. assuming an overall heat transfer coefficient of 2000 w/m2 · k, calculate the required heat transfer areas using the ntu method for the following exchanger configurations: (a) parallel flow, (b) counterflow, and (c) shell-and-tube, one shell pass and two tube passes.

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.

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa