Air conditioning systems
2nd term
Lecture 5
Dr. Samah E. Hatab
1. Space air conditioning
Fig. 1: Schematic of an air conditioning system
2. Room or conditioned space sensible heat factor
Fig. 2: Room sensible heat factor
3. Grand sensible heat factor
Fig. 3: Grand sensible heat factor
4. Summer air conditioning
Fig. 4: Summer air conditioning
Fig. 5: Summer air conditioning with zero bypass
Fig. 6: Summer air conditioning with no fresh air
5. Winter air conditioning
Fig. 7: Winter heating (adiabatic saturation)
Fig. 8: Winter heating (air washer)
6. Waste energy recovery in air conditioning systems
Fig. 9: Air to water heat recovery system
Fig. 10: Rotating heat exchanger
Fig. 11: Air-to-air heat recovery system
6.1. Energy recovery in winter air conditioning systems
Fig. 13 Process on psychometric
chart
6.2. Energy recovery in summer air conditioning systems
6.3. Energy recovery in summer air conditioning with high latent loads
 A) Utilization of outdoor-air energy
 B) Utilization of refrigerator-cond heat
6.4. Energy recovery in evaporative cooling systems
Fig. 21: Process on psychometric chart
End of lecture