Flujos Con Gases

OPERACIONES DE  TRANSFERENCIA DE CANTIDAD  DE MOVIMIENTO  Código 3007821 Periodo 01‐2012 Hernán Darío Álvarez Z. Catalina Valencia Peroni Fernando Orozco Sánchez

FLOW WITH GASES

Basicconcepts Flow with gases at low velocities (incompressible flow) Flow with gases at high velocities (compressible flow) Some applications

Flow with gases at low velocities
“It can be consideredincompressible flow” Flow around the cars and radiators

Taking off and landing of aircrafts

Flow with gases at low velocities
Flow inside and around the buildings

Flow of air in air conditioner andair heater

Flow with gases at low velocities Flow of instrument air (e.g. air used in control valve) industrial air (e.g. air used in drying process) or other gases IF PRESSURE DROP IS LESS THAN10 % OF INITIAL PRESSURE OR M < 0.3 (Mach number) These kind of flow is very common in process engineering.

Flow with gases at high velocities
“If the pressure drop due to the flow of a gasthrough a system is large enough, compared with the inlet pressure, to occasion a 10 percent or greater decrease in gas density, the flow is considered to be “compressible”. In this event, formulas must beused which make proper allowance for this change in both density and velocity”. Perry, John H. Chemical Engineers’ Handbook. 4th. edition, 1963.

BALANCE OF ENERGY

The comprension of energybalance is esential to understand the gas flow phenomenon

ENERGY BALANCE IN SHIPON

ENERGY BALANCE IN VENTURI TUBE

Flow with gases at high velocities
Frictionless and adiabatic flow Frictionadiabatic flow Isothermal flow Nozzle flow

Continuing in spanish….

ALGUNOS EJEMPLOS

Generación de energía eléctrica a partir de combustibles fósiles

Aprovechamiento de biogas parageneración energía eléctrica

Línea de aire comprimido: varias entradas y salidas

Transporte de gases, plantas de proceso con gases

Producción Ácido Sulfúrico

Conceptos básicos
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