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Derive 3-D non-steady state conduction equation in spherical co-ordinates. Explain the assumption involved.
The hot combustion gases of a furnance are divided from the ambient air and its surroundings, which are at 25 oC, by a brick wall 0.15m thick. The brick has a thermal conductivity of 1.2W/mk and a surface emissivity of 0.8 . Under steady state conditions an outer surface temperature of 100 oC is calculated. Free convention heat transfer to the air adjoining the surface is divided by a convection coefficient of 20W/m2k. what is the brick inner surface temperature?
why constant volume line has more slop tha constant pressure line in T-S diagram
Advantages of resistance welding 1. Resistance welding is very fast compared to arc welding. 2. Almost any combination of metals can be resistance welded provided necessa
advantages of proell governor
(a) Show that all reversible engines operating between the same source and sink will have same efficiency. (b) A reversible heat engine operates between two reservoirs at temper
how to find out hte optimal sequence and determine the minimun total elapsed time associated with a given problem
Draw neat diagram of aWankel engine and explain its working. Derive expressions for work done and efficiency for an Otto cycle. Illustrate with diagrams the several types of
Convert the flow-rate from Am3/h to Sm3/h Consider a compressor (model ABC-Z4). The compressor has a suction pressure of 3 barg, and a discharge pressure of 6 barg. The inlet
Solve the following three questions of the beam ABCD. Note that A is a fixed end; B is apin connection; C is a roller support; and D is a free end. 1) Sketch the quantita
for a circle,is the net work necessarily zero? for what kind of system will this be the case?
Spray Transfer In a gas shield of argon or argon rich mixture [i.e., Ar+CO 2 gas mixture containing more than 80 % argon] the metal transfer changes from globular to spray typ
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