Engineering, 18.09.2019 22:00 Lilabsterdoll
Solve the problem with conditions if a wall has inner and outer surface temperatures of 16 and 6 c, respectively. the interior and exterior air temperatures are 20 and 5 c, respectively. the inner and outer convection heat transfer coefficients are 5 and 20 w/m2 k, respectively. calculate the heat flux from the interior air to the wall, from the wall to the exterior air, and from the wall to the interior air. is the wall under steady-state conditions?
Answers: 2
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The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false
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Engineering, 04.07.2019 18:10
Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.
Answers: 3
Engineering, 04.07.2019 18:10
Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.
Answers: 1
Solve the problem with conditions if a wall has inner and outer surface temperatures of 16 and 6 c,...
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