A coal-fired 700 MW Power Plant has an efficiency of 35%, burns coal with an energy content of 10,000 BTU/lb, with 60% carbon content, 1.5% sulfur content. The coal burned produces 10% ash, and of the ash, 70% is fly ash. What are the particulate emissions released if a 99% efficient scrubber is used (in lb Fly Ash/hr)

Forced air at T = 25°C and V = 10 m/s is used to cool electronic elements on a circuit board. One such ele- ment is a chip, 4 mm X 4 mm, located 120 mm from the leading edge of the board. Experiments have revealed that flow over the board is disturbed by the elements and that convection heat transfer is correlated by an expression of the form Nu,= 0.04 Re0.85 P.1/3 V. T uz bog fr dW ninin tol 1 = 4 mm Chip Board 0:00 Wira L= 120 mm Estimate the surface temperature of the chip if it is dis- sipating 30 mW.

P3

A continuous single-effect evaporator is to be fed with 5000 kg/hr of solution containing 1 wt% solute, the feed is at a temperature of 303 K. it is to be concentrated to a solution of 2 wt% solute. The evaporation is at atmospheric pressure (101.3 kPa) and the area of the evaporator is 69.7 m2 Saturated steam is supplied at 143.3 kPa for heating. It is assumed that the Cp of feed is the same with that of water which is 4.1 kj/kg-K. Assume no BPR. Calculate: overall heat transfer coefficient