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.

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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.

Physics & Space Science

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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

Physics & Space Science

The best way to find the exact distance to the Moon is to:

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Physics & Space Science

Which approach is currently proving to be the most promising way of determining how life on Earth originated?

A) studies of Martian meteorites B) studies of organisms living around deep-sea ocean vents C) studies of the fossil record D) laboratory simulations of conditions present on the early Earth

Physics & Space Science

Explain how a photon is generated in the core of the Sun and how it is transported out from the Sun

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Physics & Space Science