{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

L25-Energy_Balance_Non-_Reactive_Sym_revised

# L25-Energy_Balance_Non-_Reactive_Sym_revised - Energy...

This preview shows pages 1–6. Sign up to view the full content.

1 Energy Balance- in Non-Reactive System

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
2 LEARNING OBJECTIVES By the end of this topic, you should be able to: Performed energy balance for non reactive system using Psychometric chart.
3 Psychrometric Charts or Humidity Chart Definition Several properties of gas-vapour mixture are cross-plotted, providing a concise compilation of a large quantity of physical properties data. Psychrometric Chart Psychrometric Chart Air-water system at 1 atm The most common type of psychrometric chart is that for: Usage: Analysis of humidification, drying and air- conditioning processes

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
4 4 4 Properties of Psychrometric Chart 1. Dry bulb temperature ( T db ) - air temperature measured by an ordinary thermometer with no water on its bulb. Unit: o C. 2. Absolute humidity ( h a ) - ‘moisture content’ of DA, i.e. kg H 2 O(v)/kg DA. Unit: kg/kg DA 3. Relative humidity ( h r ) – The measure of how saturated the air is with water vapor. It is measured as how much of water vapor is present in the air relative to the saturated condition. h r = p H2O /p* H2O (T) x 100% Curves that concave to the upper left which are corresponding to h r = 10% … 90%. The curves - bordered by 0% at the bottom and 100% at the left boundary saturation curve. Unit: %
5 5 5 3. Dew point ( T dp ) - temperature at which humid air becomes saturated if it is cooled isobarically . Move horizontally at constant h a with known T db and h r to the saturation curve. Unit:

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 14

L25-Energy_Balance_Non-_Reactive_Sym_revised - Energy...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online