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The absorber plate and the adjoining cover plate of a flat-plate solar collector are at 70 and 35°C, respectively, and are separated by an air space of 0.05 m. What is the rate of free convection heat transfer per unit surface area between the two plates if they are inclined at an angle of 60° from the horizontal?
the following figure shows the schematic diagram of a vapor compression refrigeration system using r-134a as the
Air enters a gas turbine of an air-standard Brayton cycle at 1000 kPa, 1000 K, and expands to 100 kPa in two stages. The air is reheated between the stages at a constant pressure of 400 kPa to 1000 K. The compressor work input is given as 250 kJ/kg.
12 lbm of carbon c reacts with 24 lbm of oxygen o2 to form 22 lbm of carbon dioxide co2 plus an unknown amount of
The rigid tank in the figure has a volume of 60 liters and initially contains a two-phase liquid vapor mixture of H2O at a pressure of 15 bars and a quality of 20%. As the tank contents are heated, a pressure-regulating valve keeps the pressure const..
Molybdenum forms a substitutional solid solution with tungsten. Compute the number of molybdenum atoms per cubic centimeter for a molybdenum-tungsten alloy that contains 16.4 wt% Mo and 83.6 wt% W. The densities of pure molybdenum and tungsten are..
H2O at 350oF, 60 psi enters an insulated nozzle at 10 ft/s. It leaves at 1440 ft/s and 35 psi. What is the isentropic efficiency?
The sprinklers are represented hydraulically as orifices with relatively high K values. Determine the flow distribution using the Hardy Cross method.
A converging-only nozzle has an efficiency of 96%. Air enters with negligible velocity at a pressure of 150 psia and a temperature of 750°R. The receiver pressure is 100 psia. What are the actual outlet temperature, Mach number, and velocity?
the rigid tank illustrated in the figure has a volume of 0.06 m3 and initially contains a two-phase liquid-vapor
consider a spark ignition combustion engine with two possible configurartion for turbocharging. configuration a is
the roller-coaster track shown is contained in a vertical plane. the portion of track between a and b is straight and
a tube of diameter 50 mm having a surface temperature of 85degc is embedded in the center plane of a concrete slab
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