Calculo de temperaturas en aislante de calentador cilindrico vertical
Thermal Conductivity Kaowool Blanket 8#/ft3 Temperaturas Cond term POR CURVA T °F T °C W/ m °C W/ m °C 0.0606 500 260 0.06 0.1282 1000 538 0.12 0.1758 1300 704 0.1758 0.2107 1501 816 0.21 0.2672 1800 982 0.26 0.3080 1999 1093 0.3
Thermal ConductivityKaowool Blanket 8#/ft3
0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 500 1000 1500 2000 2500 k W/m °C
°F
Thermal Conductivity Kaowool Blanket 6#/ft3 Temperaturas Cond term POR CURVA T °F T °C W/ m °C W/ m °C 0.0708 500 260 0.07 0.1509 1000 538 0.15 0.2084 1300 704 0.2084 0.2510 1501 816 0.25 0.3203 1800 982 0.32
0.4 0.3 0.2 0.1
Thermal Conductivity Kaowool Blanket 6#/ft3
k W/m °C
0 0 5001000 1500 2000
°F
0.5
Thermal Conductivity Kaowool Blanket 4#/ft3
Thermal Conductivity Kaowool Blanket 4#/ft3 Temperaturas Cond term POR CURVA T °F T °C W/ m °C W/ m °C 0.0705 500 260 0.08 0.2061 1000 538 0.19 0.2873 1300 704 0.28732 0.3417 1501 816 0.33 0.4227 1800 982 0.43
0.4 0.3 0.2 0.1 0 0 500 1000 1500 2000 k W/m °C
°Fhttp://www.barteltinsulation.com/pdfs/CERAMICBLANKET.pdf ESPESOR mm 25.4 50.8 50.8 38.1 165.1 DENSIDAD # / ft3 kg/m3 8 128.3 6 96.2 6 96.2 4 64.1 CALCULO DE AREAS CALENTADOR 2B DIAMETRO = 6.5 ALTURA (L) = 16.9 PERIMETRO= 20.3 AREA = 341.72
CAPA 1 2 3 4 SUMA
inch 1 2 2 1.5 6.5
AISLANTE KAOWOOL BLANKET 8# KAOWOOL BLANKET 6# KAOWOOL BLANKET 6# KAOWOOL BLANKET 4#
m m m m2
RADIOS [r]
r1 = r2 =
m 3.0607 3.0861
ESPESOR [E]
E1 =E2 =
m 0.0254 0.0508
COND. TERMICA
k1 = k2 =
W/m °C… a 704 °C 0.1758 0.2084 ALTURA (L) =
16.9
m
4 3
r3 = r4 = r5 =
3.1369 3.1877 3.2258
E3 = E4 = ETOTAL =
0.0508 0.0381 0.1651
k3 = k4 = hconv = Tcal = Tmetal = Tfria =
0.2084 0.28732 4.2355 704 60 20
3 2 W/m2 °C ° C (Cara Caliente) ° C (Cara fria) ° C (Temp. ambiente) r1 1
RESISTENCIAS TERMICAS
R0 =R1 = R2 = R3 = R4 = R5 = RTOTAL =
1/[h1A1] = ln(r2/r1)/[2pLk1] = ln(r3/r2)/[2pLk2] = ln(r4/r3)/[2pLk3] = ln(r5/r4)/[2pLk4] = 1/[haireA5] = R 0 + R 1 + R2 + R3 + R4 + R5
°C / W 0 0.0004 0.0007 0.0007 0.0004 0.0007 0.0030
r2 r3 r4 r5
Transferencia de Calor Estacionaria (Q*) (Q*) = [Tcal - Tfria]/Rtotal (Q*) = 228,590 W T1 T2 T3 T4 k1 k2 k3 k4 W/m2 °C W/m2 °C T5 T6 CALCULO DE h rad PORSOLVER ERROR = 9.389 0.525 hrad = hrad = -1E-06 0.09241 0.52461 (BTU/HR)/ FT2 °F W/m2 °C
PERDIDA DE CALOR (Q HL) = QHL = 668.93 W/m2 CALCULOS DE TEMPERATURAS INTERMEDIAS T1 = T2 = T3 = T4 = T5 = Tfria (T6) = Tcal Tcal - (Q*)*R1 T2 - (Q*)*R2 T3 - (Q*)*R3 T4 - (Q*)*R4 T5 - (Q*)*R5 °C 704 602.6 433.5 267.2 177.9 20.0 DIF °C 101.4 169.1 166.3 89.2 157.9 PROM °C 653.3 518.0 350.3 222.5 99.0 PROM °F1175.9 932.5 630.6 400.6 178.1 hconv = hrad = POR CURVA W/ m °C 0.1554 0.1388 0.0898 0.0436
→ → → → →
RESISTENCIAS TERMICAS
R0 = R1 = R2 = R3 = R4 = R5 = RTOTAL =
1/[h1A1] = ln(r2/r1)/[2pLk1] = ln(r3/r2)/[2pLk2] = ln(r4/r3)/[2pLk3] = ln(r5/r4)/[2pLk4] = 1/[haireA5] = R 0 + R 1 + R2 + R3 + R4 + R5
°C / W 0 0.0005 0.0011 0.0017 0.0026 0.0003 0.0062
Tcal = Tfria =
704 20
° C(Cara Caliente) ° C (Temp. ambiente) DIFERENCIA DE CALOR ESTACIONARIO (Q*) = -117,737 51.5 W
Transferencia de Calor Estacionaria (Q*) (Q*) = [Tcal - Tfria]/Rtotal (Q*) = 110,853 W
% DESV.= PERDIDA DE CALOR (Q HL) = QHL = 324.40 W/m2
CALCULOS DE TEMPERATURAS INTERMEDIAS T1 = T2 = T3 = T4 = T5 = Tfria (T6) = Tcal Tcal - (Q*)*R1 T2 - (Q*)*R2 T3 - (Q*)*R3 T4 - (Q*)*R4 T5 - (Q*)*R5 °C 704 648.4525.3 338.0 52.7 20.0 DIF °C 55.6 123.1 187.3 285.3 32.7 PROM °C 676.2 586.8 431.6 195.4 36.4 PROM °F 1217.1 1056.3 777.0 351.7 65.4 hconv = hrad = POR CURVA W/ m °C 0.1621 0.1611 0.1126 0.0303 5.559 2.301
→ → → → →
k1 k2 k3 k4 W/m2 °C W/m2 °C
CALCULO DE h rad POR SOLVER ERROR = hrad = hrad = 2.41585E-13 0.40541 2.30149 (BTU/HR)/ FT2 °F W/m2 °C
RESISTENCIAS TERMICAS
R0 = R1 = R2 =...
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