Transcript
Factores de Conversión de Unidades Fenómenos de Transporte VOLUMEN 1 litro =1000 cm 3 = 61,03 in3 3 3 1 m = 1000 l = 35,315 ft =264,172 gal =0,028317 3 m 1 ft3 = 28,317 l = 7,481 gal americanos 1 gal. Americano = 3,78 litros 1gal imperial = 1,20094 gal americanos 1 barril = 42 gal. = 5,615 ft3 = 159 litros 1 plg3 = 16,387 cm3=28,317 lt = 0,028317 m 3 MASA 1 lbm = 453,59 g = 0,4539 Kg = 16 oz = 7000 granos 1 Kg = 1000 g = 2,2046 lbm 1 tonelada métrica = 1000 Kg = 2240 lbm 1 tonelada corta = 2000 lbm
FUERZA 1N = 1 Kgm/s2 = 0,22481 lbf = 105 dinas 1 Dina = 1 gcm/s2 =10-5 Kg m/s2 = 2,2481 x 10-6 lbf 1 lbf = 4,4482 N = 0,454 Kgf 1 Kgf = 9,81 N
POTENCIA 1 watt = 1 W = 1 J/s = 14,34 cal/min 1 KW = 239 cal/s = 737,5 ft-lbf/s = 56,87 BTU/min = 1,344 HP 1 hp = 42,4 BTU/min = 33.000 ft-lbf/min = 0,7457 KW = 550 ft-lbf/s = 0,70BTU/s = 550 in-lbf/s = 745,7 W 1 caballo de vapor (c.V.) = 75 Kgfm/s = 0,736 KW 1 cavallo de caldera (B.H.P.) = 33,480 BTU/h = 9,803 KW -4 1 BTU/h = 0,2931 W = 3,93(10 ) hp -4 1 Kcal/h = 1,1622 W = 15,58 (10 ) hp CONDUCTIVIDAD TÉRMICA 1 BTU/h.ft .ºF = 4,1365 x 10-4 cal/s.cm.ºC = 1,73073 W/m.K
COEFICIENTE DE TRANSFERENCIA DE CALOR 2 -4 2 1 BTU/h.ft .ºF = 1,3571x10 cal/s.cm .ºC = 5,6783 x -4 2 2 10 W/cm .ºC = 5,6783 W/m .K 1 Kcal/h.m2.ºF = 0,2048 BTU/h.ft2.ºF FLUJO ESPECIFICO DE CALOR 1 BTU. pie2 = 3,1546 W/m2 = 0,2937 W -3 1 cal/h= 1,1622 x 10 W
LONGITUD 1m = 100 cm = 3,28 ft = 39,37 plg 1 plg = 2,540 cm 1 ft = 12 plg = 0,305 m = 30,5 cm -6 --4 1 micra = 10 m = 10 cm = 1 m (micrómetro) 1 milla terrestre = 5280 ft = 1,609 Km 1 A (angstron) = 10-10 m = 10-4 m 1 milla náutica = 6080 ft 0 1,1516 millas terrestres TEMPERATURA T (K) = 273 + T(ºC) T(ºF) = 1,8 ºC + 32 T(ºC) = (ºF –32) x 1/1,8 T(ºF) = T(ºC) /1,8 T(ºC) = 1,8 T(ºF) T(K) = T(ºC) PRESIÓN 2 2 1 atm = 760 mm Hg = 14,7 lbf/in = 1,033 Kgf/cm = 5 1,01 x 10 Pa = 1,01325 bar 1 atm = 33,93 ft de agua = 10 m de agua = 29,92 in de agua = 407 in de agua a 4ºC 1 Pa = 1 N/m2 1 bar = 0,9869 atm = 105 Pa = 14,5038 lbf/in2 = 750 mm Hg = 0,1 Mpa 1 lb/in2 = 1 lbf/in2 = 2,0360 in de Hg = 51,715 mm de Hg a 0ºC 1 lbf/ft2 = 6,89476 x 105dina/cm2 = 4,882 Kgf/m2 = 6894,7 N/m2 1 dina/cm2 = 2,0886 lbf/ft2 1 psi = 1 lbf/in2 = 730 Kgf/m2 = 144 lbf/ft2 CALOR, TRABAJO Y ENERGÍA 1 J = 1 Kg.m2/s2 = 1 N.m = 107 g.cm2/s2 (ergio) 1 BTU = 1055,06 J = 1,055 KJ = 252,16 cal (termoquímica) 1 Kcal (termoquímica) = 1000 cal = 4,1840 J 1 cal (termoquímica) = 4,1840 J 1 cal (IT) = 4,1868 J 1 BTU = 251,996 cal (IT) = 778,17 ft.lbf 1 hp.hr = 0,7457 KW.h = 2544,5 BTU 1 ft.lbf = 1,35582 J 1 ft .lbf/lbm = 2,9890 J/kg VISCOSIDAD 1 poise = 100 centipoise (cp) = 1g/cm.s -2 -4 1 cp= 10 poise = 2,4191 lb/ft.h = 6,7197 x 10 lbm/ft.s = -3 -3 -3 2 3,6 Kg/h.m = 10 Kg/m.s = 10 Pa.s = 10 N.s/m 2 1 Pa.s = 1 N.s/m = 1 Kg/m.s = 1000 cp 1 lb/ft.h = 0,4134 cp = 04134 x (10-3) Kg/m.s 1 stoke = 100 cp = 1 cm 2/s = 929 ft2/s CAPACIDAD CALORIFICA Y ENTALPÍA 1BTU/lbm.ºF = 4,1868 KJ/Kg.K = 1.000 cal/g.ºC = 2326 J/Kg 1 ft lbf /lbm = 2,9890 J/Kg 1 cal/g.ºC = 4,1868 KJ/Kg.K DIFUSIVIDAD 1 cm2/s = 3,875 pie2/h = 10-4 m2/s 1 m2/h = 10,764 pie2/h 2 4 2 1 m /s = 3,875 x 10 pie /h -2 2 1 centistoke = 10 cm /s