a) the local film condensation heat-transfer coefficient at the bottom of the tubeb) the average condensation heat-transfer coefficient over the entire length of the tubec) the total condensation rate at the tube surface. This question requires the use of the steam property tables (Rogers and Mayhew) uploadedon QM+ exam section. All properties should be evaluated at the temperature of the steam.Saturated, pure steam at a temperature of 170 °C condenses on the outer surface of avertical tube of outer diameter 2 cm and length 1.5 m. The tube surface is maintained at auniform temperature of 150 °C.Calculate:

Write the properties of steam at the given temperature.

) the local film condensation heat-transfer coefficient at the bottom of the tube b) the average condensation heat-transfer coefficient over the entire length of the tube c) the total condensation rate at the tube surfac

) the local film condensation heat-transfer coefficient at the bottom of the tube b) the average condensation heat-transfer coefficient over the entire length of the tube c) the total condensation rate at the tube surfac

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter9: Heat Transfer With Phase Change

Section: Chapter Questions

Problem 9.30P

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Concept explainers

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.

Question

a) the local film condensation heat-transfer coefficient at the bottom of the tube

b) the average condensation heat-transfer coefficient over the entire length of the tube

c) the total condensation rate at the tube surface.

This question requires the use of the steam property tables (Rogers and Mayhew) uploaded
on QM+ exam section. All properties should be evaluated at the temperature of the steam.
Saturated, pure steam at a temperature of 170 °C condenses on the outer surface of a
vertical tube of outer diameter 2 cm and length 1.5 m. The tube surface is maintained at a
uniform temperature of 150 °C.
Calculate:

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