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A paper mill has two steam generators, one at 4.5 MPa, 300?C and one at 8 MPa, 500?C. Each generator feeds a turbine, both of which have an exhaust pressure of 1.2 MPa and isentropic efficiency of 87%, such that their combined power output is 20 MW. The two exhaust flows are mixed adiabatically to produce saturated vapor at 1.2 MPa. Find the two mass flow rates and the entropy produced in each turbine and in the mixing chamber.
Compute the mass fractions of a ferrite and cementite in pearlite. What is the distinction between hypoeutectoid and hypereutectoid steels?
A liquid jet of velocity Vj and diameter Dj strikes a fixed hollow cone, as in Fig. P3.47, and deflects back as a conical sheet at the same velocity. Find the cone angle for which the restraining force
A 500-N concrete block is to be lifted by the pair of tongs shown. Determine the smallest allowable value of the coefficient of static friction between the block and the tongs at F and G.
Calculate the time required to effect a 90 percent purge of the sampler with a flow rate of 125 cm3/min.
5 kgmin of 25 degree celsius water mixes with 7 kgmin of 72 degree celsius water in a mixing chamber. calculate the
calculate the cost per piece of a milling operation that is used to machine a pocket of 2x3x0.5 lxwxd. the material
to conserve water and energy a flow reducer is installed in the shower head shown here. if the pressure at point 1
refrigerant 22 is used in the evaporator pipe of a commercial refrigeration unit. at steady state it flows at a rate of
a power unit has a power rating of 30 kw and supplies flow at a rate of 60 lpm, what is the maximum pressure this unit can withstand?
an orthotropic material has the follow properties ex 7500 ksi ey 2500 ksi gxy 1250ksi and vxy .25. determine the
Briefly describe the phenomenon of passivity. Name two common types of alloy that passivate. Why does chromium in stainless steels make them more corrosion resistant in many en- vironments than plain carbon steels?
A speaker driver can be modeled as a one degree of freedom forced system with damping. The mass of the moving cone is m=0.1 kg and the spring k=50000N/m.
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