Water surrounds hot horizontal tubes 3 cm in diameter in a nuclear steam generator having surface temperature of 800ºC. The water is at a pressure of 800 kPa. If film boiling is assumed, estimate the total convection heat transfer coefficient between the water and the tube surfaces.
What will be an ideal response?
Using Mathcad for the analysis here and obtaining properties of water from the saturation Appendix Table B-6 and then using Equation 10-11, Bromley’s equation, the convective heat transfer coefficient can be predicted.
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to determine the Nusselt number and heat transfer coefficient for the conditions given in.
GIVEN
• A long cylinder immersed in a fluid
• Diameter (D) = 0.1 m
• Surface temperature (Ts) = 400 K
• Fluid temperature (T?) = 350 K
FIND
The Nusselt number (Nu) and heat transfer coefficient (hc) for each fluid
SKETCH
PROPERTIES AND CONSTANTS
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Explain how a photon is generated in the core of the Sun and how it is transported out from the Sun
What will be an ideal response?