Chapter 1 Basics of Heat Transfer1-94Using 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=×−567 108. W/m.24KBtu / h.ft .RAnalysisThe conversion factors for W, m, and Kare given in conversion tables to be 1 W = 3.41214 Btu / h1 m = 3.2808 ft1 K = 1.8 RSubstituting gives the Stefan-Boltzmann constant in the desired units, =5673 2808.(.W /m .K = 5.673.41214 Btu /hft) (1.8 R)0.171 Btu / h.ft .R1-95Using 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.ft2.°F. AnalysisThe conversion factors for W and mare straightforward, and are given in conversion tables to be
This is the end of the preview. Sign up
access the rest of the document.
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.