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A tube bank uses an aligned arrangement of 30-mmdiameter tubes with ST = SL = 60 mm and a tube length of 1 m. There are 10 tube rows in the flow direction (NL = 10) and 7 tubes per row (NT = 7). Air with upstream conditions of T∞ = 27°C and V = 15 m/s is in cross flow over the tubes, while a tube wall temperature of 100°C is maintained by steam condensation inside the tubes. Determine the temperature of air leaving the tube bank, the pressure drop across the bank, and the fan power requirement.
an evacuated 150 l tank is connected to a line flowing air at room temperature 25 degrees c and 8 mpa pressure. the
The diameter of a concrete pole varies from 240mm at base to 120mm at top pole being 10m high.Find the maximum stress induced in pole if a load of 600N acts at top
Using the hydrostatic law dp/dz = -(rho)g and the ideal gas law p = (rho)RT, show that if the temperature of the atmosphere varies with height as T(z) = T_o - Bz, then the atmospheric pressure varies with height as p(z) = p_o(1-(Bz/T_o))^(g/(BR))
25 of the cables have failed after 12 years and 55 failed after 16 years. if the distribution if normal what is the
geothermal energy systems extract heat that is stored below the earths crust. for every 300 ft below ground the
A journal bearing is proposed for a steam engine. the load on the journal is 3 kN, diameter 50 mm length 75 mm speed 1600 r.p.m , diametral clearance 0.001 mm ambient temperature 15.5 C oil SAE 10 is used and the film temperature is 60 C. Determine t..
Determine the time it will take for the ?ow to reach 99% of the ?nal steady-state velocity if the valve is initially closed and then suddenly opened at t ¼ 0. Assume incompressible water and inelastic piping. Let f ¼ 0.030 and K ¼ 0.2 once the valv..
Describe the theory used for the IZOD test and what units are used to report toughness? Explain the change in magnetic properties when steel is heated. Is this due to allotropic properties?
The uniform bar of length 0.75 m rests in a frictionless circular trough of radius 0.5 m. If the bar is displaced slightly from the equilibrium position and released, calculate the natural frequency of the ensuing oscillation
air at 5 bar 500 k and a volumetric flow rate of 8 m3s enters an insulated turbine operating at steady and exits with a
mr. jones plans to purchase a new 18000 automobile. he wants to borrow all the money for the car and repay it in equal
water flows from a storage tank through a horizontal 6-inch pipe cast iron and discharges water 20 degrees celsius into
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