L26-Energy_Balance_Non-Reactive_System

L26-Energy_Balance_Non-Reactive_System - ENERGY BALANCES...

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Previous lecture: Example on Energy balance problem Step 1: flowchart Step 2: material balances Step 3: Write energy balance Step 4: Reference state Step 5: Inlet-outlet enthalpy table Step 6: Solve for streams’ specific enthalpy Step 7: Solve the energy balance ENERGY BALANCES ENERGY BALANCES
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Today lecture: Psychrometric Charts another method of obtaining physical property data also known as humidity chart properties of a gas-vapour mixture are cross-plotted most common: air-water system at 1 atm – used in humidification, drying and air-conditioning processes ENERGY BALANCES ENERGY BALANCES
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Psychrometric Charts – Definition Properties of humid air at 1 atm Dry-bulb temperature (T db ) – abscissa of the chart (y-axis): air temp measured by thermometer or thermocouple Absolute Humidity h a [kg H 2 O(v)/kg DA] – ordinate of chart (x-axis): called moisture content in chart. Expressed in ratio – used to calc. or derived mass
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This note was uploaded on 08/08/2009 for the course CHEMICAL 11189 taught by Professor Dr.azmi during the Spring '09 term at International University in Germany.

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L26-Energy_Balance_Non-Reactive_System - ENERGY BALANCES...

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