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An open feedwater heater operates steadily with 30 kg/hr of liquid water entering one inlet at 40 °C and 700 kPa. Water vapor enters a second inlet at 200 °C and 700 kPa. Saturated liquid exits with a pressure of 700 kPa. The dead state temperature and pressure is 20 °C and 100 kPa, respectively. (a) Draw and label a schematic of the system. (b) Determine the mass flow rate (kg/s) of water vapor needed and (c) the rate of exergy destruction (kW)
An air conditioner in the airport of Timbuktu runs a cooling system using R-410a with a high pressure of 1500 kPa and a low pressure of 200 kPa. It should cool the desert air at 45 degrees C down to 15 degrees C. Find the cycle COP. Will the syste..
what is the effect of quenching on the transition temperature and toughness for the mild steel ?
What is the inner tube surface temperature at the outlet, where fully developed conditions may be assumed?
Show that the total true strain is the sum of the true strains in each step, that is the true strains are additive. Show that using engineering strains, the strain for each step cannot be added to obtain the total strain.
the snowmobile is traveling at 10m/s when it leaves the embankment at A.determine the speed at which it strikes the ground at B and its maximum acceleration along the trajectory AB.
Calculate the maximum bending stress at mid-span, and, for the same section, locate the neutral axis. Neglect the weight of the beam
How the lubricants reduce the friction and wear characteristics of the parts in contact?
An ideal vapor-compression refrigeration system operates at steady state with Refrigerant 134a as the working fluid. Superheated vapor enters the compressor at 30 lbf/in2, 20F, and saturated liquid leaves the condenser at 140 lbf/in2. The refriger..
Air at 90 kpa and -7 C enters an adiabatic diffuser steadily with a velocity of 180 m/s and leaves with a low velocity at a pressure of 100 kpa. The exit area of the diffuser is 5 times the inlet area. Determine (a) the exit temperature and (b) th..
What is the temperature 7 cm from the base if the rod is made of a) pure zinc b) lead c) pure gold. Which will be the hottest at this point?
The compression ratio of an air-standard Otto cycle is 9.5. Prior to the isentropic compression process, the air is at 100 kPa, 17 C, and 600 cm2
what is the flow rate required to cool and maintain 0.5 x 0.5 x 0.5 m3 volume of air at 297 K to 199 K, using nitrogen at 199 K
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