subject
Engineering, 12.03.2021 15:00 lalisa6745

Consider a layer of insulation installed around a steam pipe. The radius of the pipe is R1 and the thickness of the insulation is R3-R1.The stream is maintained at a temperature TW and the air surrounding the insulation is at a temperature To and flows cross wise over the pipe. The air is flowed over the steam pipe at high enough velocity so a thermal boundary layer develops over the surface described by a heat transfer coefficient h. Required:
Beginning with the heat equation, calculate the total quantity of heat being conducted per unit time (heat flow) through the insulation, Q (units: energy/time).

ansver
Answers: 3

Another question on Engineering

question
Engineering, 04.07.2019 18:10
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Answers: 1
question
Engineering, 04.07.2019 18:10
An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0
Answers: 3
question
Engineering, 04.07.2019 18:20
Select any two (2) areas of applications of chain-drive. (clo4) a)-permanent lubrication necessary b)-hydraulic forklift truck operation c)-rigging and heavy moving materials d)-relatively high maintenance costs e)-costlier than belt drives
Answers: 2
question
Engineering, 04.07.2019 18:20
Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.
Answers: 1
You know the right answer?
Consider a layer of insulation installed around a steam pipe. The radius of the pipe is R1 and the t...
Questions
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Social Studies, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Biology, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
question
Mathematics, 10.09.2020 05:01
Questions on the website: 13722363