Pressure, Vacuum, Differential Pressure, And Temperature ...
Gtac1 2 temperature-pressure 1
Transcript of Gtac1 2 temperature-pressure 1
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Section 1 Menu
Introduccion
Medicion del calor
Graficas de calor
Transferencia de calor
Presion
Temperature and Pressure Temperature and Pressure
2
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TEMPERATURA Y CONTENIDO DE CALOR
AGUA VAPOR
EBULLICION DEL AGUA A NIVEL DEL MAR
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BTU MIDEN:
TRANFERENCIA DE CALOR
CAP. DE ENFRIAMIENTO Y CALEFACCION
CARGA DE ENFRIAMIENTO Y CALEF.
CONTENIDO DE CALOR DEL REFIGERANTE(ENTALPIA)
CONTENIDO DE CALOR
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UNIDAD TERMICA BRITANICA : Es laCantidad de calor que debe ser agregada oremovida de una libra de agua para cambiar(elevar o bajar) su temperatura en un gradoFahrenheit.
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EL CALOR DEL AGUA
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CALORSENCIBLE
LIBRAS
LIBRAS
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CALOR ESPECIFICO =
El la cantidad de calor que debe ser agregada o removida a una libra de cualquier sustancia para cambiar ( elevar o bajar ) su temperatura un grado Fahrenheit.
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SUSTANCIACALOR ESPECIFICOBTU/(Lb)( F)
Aumento de temp. (F) Por 1 BTU agregado
Agua (Liquido)
MetalHieloCorchoVaporAire (seco)AluminioHierro
CobreBronceMercurio
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Transferencia de calor sensible
Calor especifico de la sustancia
Peso de la sustancia
Cambio en la temperatura de la sustancia
Libras (Lb)Grados (F)
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CALOR LATENTE DE VAPORIZACION
CALOR LATENTE = 1 LIBRA X 970 BTU/ LIBRA = 970 BTU
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CALOR (144 BTU/Lb.)
CALOR LATENTEDE FUSION (AGUA) =
1 LIBRA X 144 BTU/Lb.= 144 BTU
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CALOR TOTAL = CALOR SENCIBLE + CALOR LATENTE
CALOR SENCIBLE = 180 BTU
CALOR LATENTE = 970 BTU
CALOR TOTAL = 1150 BTU
CONTENIDO TOTAL DE CALOR = ENTALPIA (BTU/Lb.)
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GRAFICANDO EL CALOR
PARA QUE FASTIDIAR ?
- ENTENDER LA TRANSFERENCIA DE CALOR
- ENTENDER LA ENTALPIA
- ENTENDER LOS DIAGRAMAS P - H
PODER ENTENDER EL SISTEMA
PARA PREDESIR PRESIONES /TEMPERATURAS
FACILITA EL DIAGNOSTICO DE FALLAS
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CALOR SENCIBLE DEL AGUA
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EVAPORADOR CONDENSADOR
AIRE INTERIOR AIRE EXTERIOR
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T – H DIAGRAMA DEL REFRIGERANTE
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T – H DIAGRAMA DEL REFRIGERANTE
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T – H DIAGRAMA DEL REFRIGERANTE
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CALOR- CUANTO ?
- QUE RAPIDO ?
RAZON DE TRANFERENCIADE CALOR
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HIELOA
CUANDO SE FUNDE EN 24 HORAS =1 TON. DE REFRIGERACION
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(CAPACIDAD DE CARGA)
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PRESION =FUERZA / AREA
PRESION = FUERZA
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SÓLIDOSUNA DIRECCION
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LA PRESION ESIGUAL EN TODASDIRECCIONES
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ATMOSFERA
TIERRA
AGUA
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BAROMETRO SIMPLE DE MERCURIO
PRESION PRESION
MERCURIO
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PRESION ATMOSFERICA
TIERRA
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MEDICION DE PRESIONPRESION ABSOLUTA PRESION MANOMETRICA
Pronostico Clima- tologico
Sistemas de Ingenie-rias
tTécnico de Servicio
Manómetros permanentesInstalados en sistemas deRefrigeración
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La presión absoluta igual o por debajoDe la presión atmosférica es expresada En: Pulgadas de mercurio absolutas
(in. Hg. Abs.)
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PULGADAS DE MERCURIO ABSOLUTAS
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La presión absoluta igual o por arriba deLa presión atmosférica es expresada en:Libras por pulgada cuadrada absoluta
( PSIA)
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COMPARACION DE LAS ESCALAS DE PRESION ABSOLUTA
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PRESION MANOMETRICA
PRESION ATSMOSFERICA(PRESION BAROMETRICA)
PRESION ABSOLUTA
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La presión manométrica igual o por debajoDe la presión atmosférica es expresada en:
Pulgadas de mercurio de vacío.
( In. Hg. Vac.)
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ESCALAS DE PRESION ABS. Vs MONOMETRICAS (POR DEBAJO DE LA PRESION ATMOSFERICA)
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La presión manométrica igual o por arribaDe la presión atmosférica es expresada en:Libras por pulgada cuadrada
( PSIG )
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MANOMETRICA ABSOLUTA
MERCURIO
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TEMP. DE SATURACION
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TEMP. DE SATURACION