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TRABAJO PRACTICO N º4
RENDIMIENTO DEL GENERADOR DE VAPOR - METODO INDIRECTO
DATOS
Del combustible : fuel-oil
83,84 % [ C ]
10,47 % [ H2 ]
0,17 % [ S ]
0,3 % [ N2 ]
0,3 % [ H2O ]
0,19 % [ O2 ]
0,13 % [ Cenizas ]
PCS = 10627 kcal/kg
Cp 70 ºC = 0,4 kcal/kg
TF.O = 110 ºC
De los gases en la chimenea : (Analizador de D'Orsat)
Tgases = 150 ºC
T ambiente =25 ºC
13,5 % [CO2]
0,65 % [CO]
2,8 % [O2]
Cp [CO2] = 0,41 kcal/kg ºk
Cp [N2] = 0,314 kcal/kg ºk
Cp [SO2] = 0,41 kcal/kg ºk
Cp [H2O] = 0,373 kcal/kg ºk
Cp [EA] = 0,314 kcal/kg ºk
%VCO2 + %VCO + %VO2 % VN2 = ?
Del generador de vapor : ( ciclo Hitachi)
Nota :Para producción a máxima carga : 10000 Kw.
Pv = 41 kg/cm2 [Presión absoluta de vapor] [1]
Tv = 435 ºC [Temperatura del vapor] [1]
Gv = 57436 kg/hs [Caudal de vapor] [1]
TAA= 190 ºC [Temperatura agua de alimentación] [25]
GAA= 58016 kg/hs [Caudal agua de alimentación] [25]
Tpurga= 30 ºC [Temperatura de purga] [22]
Gp = 580 kg/h [Caudal de purga] [24]
hv = 787,1 kcal/kg [Entalpía de vapor] [1]
Cálculos:
Calculo de perdida por radiación y convección:
Calor máximo recibido:
Calor recibido (útil):
con QVMAX y QV, se entra al grafico de perdidas por radiación y convección:
Para :
del grafico:
Pr1: 0,47 % ( referido al PCS)
Corrección por el PCI:
Calculo del PCI:
entonces:
Análisis teórico de la combustión:
Oxigeno necesario
Volumen de aire necesario
volumen de nitrógeno total
volumen de los gases secos [ VGS(TEORICO)]
calculo del exceso de aire [EA]
entonces:
-
=16,2%
Volumen de aire con exceso de aire [total]
Volumen del Nitrógeno a la salida en %
entonces:
Volumen de los gases a la salida en m3
volumen de agua total
perdida por calor sensible [%Pcs]
donde:
ahora:
perdida por calor latente [Pcl]
donde:
Calor latente [Qcl]:
entonces:
ahora:
perdida por purga [%Pp]
donde:
Gp = 580
ahora:
Determinación del rendimiento en el generador de vapor
formula para comprobación
Descargar
Enviado por: | Gato |
Idioma: | castellano |
País: | Argentina |