Engineering, 16.10.2019 05:10, amberc5110
Alarge furnace in a heat treatment factory is located in close proximity to another large piece of equipment. both the furnace and equipment are large enough that the gap between them can be characterized by two infinitely-large parallel plates. it is critical that the surfacetemperatureof the equipment(ε=0.5)remains at a steady450k. the surface temperature of the furnace wall(ε=0.8)is 800k. to block radiation, you build a radiation shield that consists of 5 identical thin aluminum sheets, each with an emissivity of ε=0.1 on both sides. the aluminum sheets are positioned with thin gaps between them. calculate the net rate of radiation heattransfer, per unit area, between the furnace wall and equipment surface with 0, 1, and all 5 ofthese radiation shields in placefor these temperature conditions.
Answers: 2
Engineering, 03.07.2019 14:10, bryneosburn
Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned
Answers: 2
Engineering, 04.07.2019 18:10, danksans7011
The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false
Answers: 1
Engineering, 04.07.2019 18:10, lowkeyqueenk
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
Answers: 1
Alarge furnace in a heat treatment factory is located in close proximity to another large piece of e...
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