A liquid-dominated geothermal plant with a single flash separator receives water at 400 oF. The separator pressure is 150 psia. The direct connect condenser operates at 5 psia. The turbine has a polytropic efficiency of 0.75. For a cycle output of 10 MW, find (a) the steam mass flow rate, in pounds mass per hour, (b) the well water mass flow rate, in pounds mass per hour, (c ) the reinjected brine mass flow rate in pounds mass per hour, (d) the cycle efficiency, and € the cooling water mass flow rate if such water is available at 80 oF. You can ignore the pump work.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?

A)-in the process of engineering design, explain the contribution of material selection. b)- explain the procedure of synthesis as is employed in engineering design. c)- is there any relationship between ergonomics and engineering design? explain. d)- safety consideration in engineering design includes human, product and the enviroment . explain how safety will be incorporated into the design?