1. Water-recycling desert cooler
Air ventilation and cooling
Nadav Arad
Ruslan Moger
José Rocha
Jana Wolf

3. Desert Cooler

4. Thermal comfort diagram
Temp.
in °C
Comfort zone (with air circulation)
Relative Humidity in %

5. How can we reduce the amount of water consumed by the desert cooler?
PROBLEM
How can we reduce the amount of water consumed by the desert cooler?

7. Peltier Effect

8. Dry air out

9. Table 1: Table showing the energy consumed by two different cooling system in 12 months in a 150 m² building
Cooling System
Energy consumption
[kWh]
Air Conditioning
6,000
Desert Cooler
1,500

10. Table 2: Table showing the volume of water used for two evaporative cooling systems per hour.
Water Consumption
[L/hr]
Regular desert cooler
Our design (10 plates)
5 to 10 liters less

11. Regular air conditioning*
Table 3: Table showing the energy consumption of pletier system as compared to regular AC system
Cooling System
Energy Consumption
[kWh]
Regular air conditioning*
6,000
Our design (10 plates)**
1,200
* Using electrical energy
**Using solar energy

12. Table 4: Table showing the cost of implementation of two different cooling systems for a fully conditioned houses (150m2)
Cooling System
Cost
[US dollars]
Air Conditioning
3,500 – 4,000
Desert Cooler
600 – 1,000

13. No user-driven regulation
Advantages
Disadvantages
Save energy
No user-driven regulation
Save water
Maintenance
Heat lost from the peltier system?
What is the rate of the condensation of water?
To what extent can the water be re-circulated? ?

14. CONCLUSION Ventilation cannot be separated from conditioning
Air conditioning accounts for high power consumption and, therefore, money spending
Energy efficiency can be achieved by reducing AC usage
Desert coolers provide with an alternative to such systems
Water loss issue associated to desert coolers can be adressed by platier thermoelectric technology
However, further research is requeried on the subject.

15. References
"Evaporative Cooling." Evaporative Cooling. N.p., n.d. Web. 04 Mar. 2013http://
"Swamp Cooler Water and Energy Use." Swamp Cooler Water and Energy Use. N.p., n.d. Web. 04 Mar <
"Swamp Cooler Sizing." Swamp Cooler Sizing. N.p., n.d. Web. 05 Mar <
Martin K. "Evaporative Cooler Water Use." University of Arizona, July Web. 04 Mar
"Evaporative Air Conditioners and Water Use." Northern Territory Government, n.d. Web. 04 Mar
"Technical Information for Cooling Towers Using Recycled Water." San Diego Country Water Authority, n.d. Web. 04 Mar
Atta, Raghied M. "Solar Water Condensation Using Thermoelectric Coolers." Department of Electrical Engineering. Taibah Universitz, Web.