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Calcium Silicate has replaced asbestos as the preferred insulation for steam lines in power plants. Consider a 40 cm O.D., 4 cm wall thickness steel steam line insulated with a 12 cm thickness of calcium silicate. The insulation is protected from damage by an aluminium sheet lagging that is 2.5 mm thick. The steam temperature is 565 C and ambient air temperature in the power plant is 26 C. The inside convective resistance is negligible, the outside convective heat transfer coefficient can be taken as 11 W/m2K, and the remittance of the aluminium is 0.1. Calculate the rate of heat loss per meter. Thermal conductivity of the pipe wall and Calsilite calcium silicate insulation blocks are 40 W/(m K) and 0.092 W/(m K) respectively.
The catapult is used to launch a ball such that it strikes the wall of the building at the maximum height of its trajectory. If it takes 1.5 s to travel from A to B, determine the velocity vA at which it was launched, the angle of release q, and t..
a heat exchanger is to be designed to condense 1100 kghr of steam ay 150 kpa. for this purpose cooling water at 50
A v-belt drive system consists of a 12.4" diameter driving sheave and a 21.1" diameter driven sheave connected by a 5V belt. if the center distance is to be no more than 38" specify the longest possible standard belt that can be used and what the res..
a stunt driver proposes to drive a small automobile at the speed of 45 mihr on the vertical wall of a circular pit of
an 8-kg iron casting at 550 degc is quenched in a tank containing 0.03 m3 of liquid water initially at a temperature of
a power cycle operates between 100 degrees c and 25 degrees c. if the heat transfer rate from high temperature
give the schematic representation of the equilibrium microstructures for a lead-tin alloy of composition 45 wt of tin
if the 50-kg kg crate starts from rest and achieves a velocity of v v 4ms ms ms 0when it travels a distance of 5 mm m
Consider two ideal gases, A and B that are initially separated. For each of the following processes, the gases are allowed to mix. Determine if the entropy change of the system is positive, negative, or zero. Explain. (a) The process occurs isotherma..
the pressure of a gas inside a piston-cylinder device is initially balanced by an atmospheric pressure of 100kpa and an
A 0.453-Kg mass attached to a light spring elongates it by 7.87mm. Determine the natural frequency of the system.
a cam rotating at a constant speed of 100 rpm drives a roller follower such taht it has a displacement given byy 10
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