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Tom [10]
3 years ago
8

Consider a very long rectangular fin attached to a flat surface such that the temperature at the end of the fin is essentially t

hat of the surrounding air, i.e. 20°C. Its width is 5.0 cm; thickness is 1.0 mm; thermal conductivity is 200 W/m·K; and base temperature is 40°C. The heat transfer coefficient is 20 W/m2 ·K. Estimate the fin temperature at a distance of 5.0 cm from the base and the rate of heat loss from the entire fin.

Engineering
1 answer:
zepelin [54]3 years ago
4 0

Answer:

attached below

Explanation:

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Wet steam at 15 bar is throttled adiabatically in a steady-flow process to 2 bar. The resulting stream has a temperature of 130°
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Answer:

\Delta s = 0.8708\,\frac{kJ}{kg\cdot K}

Explanation:

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m\cdot (h_{in} - h_{out}) = 0

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State 1 - Inlet (Liquid-Vapor Mixture)

P = 1500\,kPa

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h = 2726.9\,\frac{kJ}{kg}

s = 6.3068\,\frac{kJ}{kg\cdot K}

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State 2 - Outlet (Superheated Vapor)

P = 200\,kPa

T = 130\,^{\textdegree}C

h = 2726.9\,\frac{kJ}{kg}

s = 7.1776\,\frac{kJ}{kg\cdot K}

The change of entropy of the steam is derived of the Second Law of Thermodynamics:

\Delta s = 7.1776\,\frac{kJ}{kg\cdot K} - 6.3068\, \frac{kJ}{kg\cdot K}

\Delta s = 0.8708\,\frac{kJ}{kg\cdot K}

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What are the Basic requirements of drinking Water ?
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Answer:

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Explanation:

Hope it helps you

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