Thermodynamics HW Solutions 48

Thermodynamics HW Solutions 48 - Chapter 1 Basics of Heat...

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Chapter 1 Basics of Heat Transfer 1-94 Using the conversion factors between W and Btu/h, m and ft, and K and R, the Stefan-Boltzmann constant is to be expressed in the English unit, . σ 567 10 8 . W / m . 24 K Btu / h.ft .R Analysis The conversion factors for W, m, and K are given in conversion tables to be 1 W = 3.41214 Btu / h 1 m = 3.2808 ft 1 K = 1.8 R Substituting gives the Stefan-Boltzmann constant in the desired units, = 567 3 2808 . (. W /m .K = 5.67 3.41214 Btu /h ft) (1.8 R) 0.171 Btu / h.ft .R 1-95 Using the conversion factors between W and Btu/h, m and ft, and ° C and ° F, the convection coefficient in SI units is to be expressed in Btu/h.ft 2 . ° F. Analysis The conversion factors for W and m are straightforward, and are given in conversion tables to be
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This note was uploaded on 01/14/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.

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