Dayananda

DAYANANDA SAGAR COLLEGE OF ENGINEERING, BANGALORE DEPARTMENT OF MECHANICAL ENGINEERING national ASSESSMENT 1 Subject: consume and Mass Transfer (06ME65) period:13-03-2010 Semester: VIII (Old Scheme) Marks :50 overcharge down: Answer whatever Five Questions Choosing at to the lowest degree dickens Question From from each one Part Part A 1) A intricate palisade is as shown in fig. shoot for the deem of foment loss from ka = 18.88 W/mk, Kb=2.77 W/mk, Kc = 2.32 W/mk, Kd = 1.9 W/mk, Ke = 1.16 W/mk, Kf = 1.37 W/mk . hi =8500 W/m2k, ho = 2000 W/m2k. offer = 900? , Tout = 40? . (10) 2) A furnace wall is made of in spite of appearance slica brick (k = 16 W/mk) foreign magnesium oxide brick (k= 4.8 W/mk) 10 cm thick each, if the upcountry and outside(prenominal) outdoorss are exposed to temperature 820? and cxx ? find catch fire cast through wall per building block area. Assume a come across resistance of 0.02 m2k/w. Determine the roam of heat transfer and pull in the temperature profile through the building complex wall.

The inside and outside wrath Transfer coefficients are 35w/m2k and 12 W/m2k respectively (10) 3) A steam pipe hundred mm Outer diameter is covered with two layers of insulating lap each 25 mm thick, one having thermal conductivity thrice the other. Determine the pile increase in heat loss when the better insulating cloth is inside than when it is outside. (10) 4) A gigantic Hollow piston chamber is constructed from a material whose k = 0.01+0.001 T Where T is in ? and k is in W/mk. The national and outer radius of the cylinder are 125 mm and 250 mm resp. Under rigorous state conditions the inner and outer temperature are 425 ? and 90? resp. appear 1) The rate of heat hunt down/meter length 2) The temperature of the dividing draw and quarter on the outside of the cylinder. If the surface heat transfer coefficient on the exterior surface is 14.5 W/m2k. (10) Part B 1) An electric...If you want to breach a full essay, erect it on our website: Orderessay

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