Engineering

Engineering, 11.07.2019 03:30, thulani2

Atmospheric air is in parallel flow (u=10 m/s, to= 15°c) over a flat heater surface that is to be maintained at a temperature of 90°c. the heater surface area is 0.25 m^2, and the airflow is known to induce a drag forde of 0.15 n on the heater. what is the electrical power needed to maintain the prescribed surface temperature?

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Engineering, 24.09.2019 00:30, aebacchieri

Acartridge electrical heater is shaped as a cylinder of length l=200mm and outer diameter d=20 mm. under normal operating conditions the heater dissipates 2kw while submerged in a water flow that is 20℃ and provides a convection heat transfer coefficient of ℎ = 5000 w/m2k. neglecting heat transfer from the ends of the heater, determine its surface temperature . if the water flow is in advertently terminated while the heater continues to operate, the heater surface is exposed to air that is also at 20℃ but for which ℎ = 50 w/m2k. what is the corresponding surface temperature?

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Engineering, 10.10.2019 20:30, kellersweeney

Acartridge electrical heater is shaped as a cylinder of length l=200 mm and outer diameter d=20 mm. under normal operating conditions the heater dissipates 2 kw while submerged in a water flow that is at 20c and provides a convection heat transfer coefficient of h=5000 w/mk. neglecting heat transfer from the ends of the heater, determine its surface temperature ts. if the water flow is inadvertently terminated while the heater continues to operate, the heater surface is ex posed to air that is also at 20c but for which h=50 w/m k. what is the corresponding surface temperature? what are the consequences of such an event?

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Engineering, 15.10.2019 05:00, darkdestroyer0888

Acartridge electrical heater is shaped as a cylinder of length l=200mm and outer diameter d=20 mm. under normal operating conditions the heater dissipates 2kw while submerged in a water flow that is 20℃ and provides a convection heat transfer coefficient of ℎ = 5000 w/m2k. neglecting heat transfer from the ends of the heater, determine its surface temperature . if the water flow is in advertently terminated while the heater continues to operate, the heater surface is exposed to air that is also at 20℃ but for which ℎ = 50 w/m2k. what is the corresponding surface temperature?

Answers: 2

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Engineering, 29.10.2019 05:31, yasarhan2

Acartridge electrical heater is shaped as a cylinder of length l=200 mm and outer diameter d=20 mm. under normal operating conditions the heater dissipates 2 kw while submerged in a water flow that is at 20c and provides a convection heat transfer coefficient of h=5000 w/mk. neglecting heat transfer from the ends of the heater, determine its surface temperature ts. if the water flow is inadvertently terminated while the heater continues to operate, the heater surface is ex posed to air that is also at 20c but for which h=50 w/m k. what is the corresponding surface temperature? what are the consequences of such an event?

Answers: 3

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Atmospheric air is in parallel flow (u=10 m/s, to= 15°c) over a flat heater surface that is to be ma...

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