tailieunhanh - Ebook Principles of heat transfer (7th edition): Part 1

(BQ) Part 1 book "Principles of heat transfer" has contents: Basic modes of heat transfer, heat conduction, numerical analysis of heat conduction, analysis of convection heat transfer, natural convection. | 5/14/10 7:30 AM Page ii Conversion Factors for Commonly Used Quantities in Heat Transfer Quantity English : SI* SI : English Area 1 m2 ϭ ft2 ϭ in2 1 ft2 ϭ m2 1 in2 ϭ ϫ 10Ϫ4 m2 Density 1 kg/m3 ϭ lbm/ft3 1 lbm/ft3 ϭ kg/m3 1 slug/ft3 ϭ kg/m3 Energy† 1 J ϭ ϫ 10Ϫ4 Btu 1 1 1 1 Energy per unit mass 1 J/kg ϭ ϫ 10Ϫ4 Btu/lbm 1 Btu/lbm ϭ 2326 J/kg Force 1 N ϭ lbf 1 lbf ϭ N Heat flux 1 W/m2 ϭ Btu/(h и ft2) 1 Btu/(h и ft2) ϭ W/m2 1 kcal/(h и m2) ϭ W/m2 Heat generation per unit volume 1 W/m3 ϭ Btu/(h и ft3) 1 Btu/(h и ft3) ϭ W/m3 Heat transfer coefficient 1 W/(m2 и K) ϭ Btu/(h и ft2 и °F) 1 Btu/(h и ft2 и °F) ϭ W/(m2 и K) Heat transfer rate 1 W ϭ Btu/h 1 Btu/h ϭ W 1 ton ϭ 12,000 Btu/h ϭ W Length 1m ϭ ft ϭ in 1 ft ϭ m 1 in ϭ m Mass 1 kg ϭ lbm 1 lbm ϭ kg 1 slug ϭ kg Mass flow rate 1 kg/s ϭ lbm/h ϭ lbm/s 1 lbm/h ϭ kg/s 1 lbm/s ϭ kg/s Power 1 W ϭ Btu/h 1 1 1 1 Btu/h ϭ W Btu/s ϭ W lbf и ft/s ϭ W hp ϭ W Pressure and stress (Note: 1 Pa ϭ 1N/m2) 1 N/m2 ϭ ϭ ϭ ϭ 1 1 1 1 lbf/ft2 ϭ N/m2 psi ϭ 1 lbf/in2 ϭ N/m2 standard atmosphere ϭ ϫ 105 N/m2 bar ϭ 1 ϫ 105 N/m2 lbf/ft2 ϫ 10Ϫ4 lbf/in2 ϫ 10Ϫ3 in water ϫ 10Ϫ4 in Hg Btu ϭ J cal ϭ J lbf и ft ϭ J hp и h ϭ ϫ 106 J Copyright 2011 Cengage Learning, Inc. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. 5/14/10 7:30 AM Page iii Conversion Factors for Commonly Used Quantities in Heat Transfer (Continued) Quantity SI : English English : SI* Specific heat 1 J/(kg и K) ϭ ϫ 10Ϫ4 Btu/(lbm и °F) 1 Btu/(lbm и °F) ϭ 4187 J/(kg и K) Surface tension 1 N/m ϭ lbf/ft 1 lbf/ft ϭ N/m 1 .