8.6 wp water is the working fluid in an ideal rankine cycle. steam enters the turbine at 1400 lbf/in.2 and 1000°f. the condenser pressure is 2 lbf/in.2 the net power output of the cycle is 1 × 109 btu/h. cooling water experiences a temperature increase from 60°f to 76°f, with negligible pressure drop, as it passes through the condenser.

determine for the cycle

a. the mass flow rate of steam, in lb/h.
b. the rate of heat transfer, in btu/h, to the working fluid passing through the steam generator.
c. the thermal efficiency.
d. the mass flow rate of cooling water, in lb/h.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed. gi) ifn 1, what will happen to the material when transformed material when

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?