subject
Engineering, 05.10.2019 11:30 notashley1703

Awall 2 cm thick is to be constructed from material that has an average thermal conductivity of 1,3 w/m.°c. the wall is to be insulated with material having an average thermal conductivity of 0.35 w/m.ºc, so that the heat loss per square meter will not exceed 1830 w. assuming that the inner and outer surface temperatures of the insulated wall are 130°c and 30°c, calculate the thickness of insulation required.

ansver
Answers: 3

Another question on Engineering

question
Engineering, 04.07.2019 18:10
Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.
Answers: 3
question
Engineering, 04.07.2019 18:20
Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.
Answers: 3
question
Engineering, 04.07.2019 18:20
Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero
Answers: 2
question
Engineering, 04.07.2019 18:20
Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]
Answers: 1
You know the right answer?
Awall 2 cm thick is to be constructed from material that has an average thermal conductivity of 1,3...
Questions
question
Mathematics, 10.07.2019 06:10
Questions on the website: 13722363