1. Desiccant Cooling A good deal for everyone Henrik Näsström

2. In general 2015-08-292 Creates air cooling from district heating An alternative to traditional methods Can make incoming air colder from 30°C to 15°C. Using district heating instead of electricity No noisy compressor or condenser, no environmentally harmful refrigerants Built using proven standard components Requires large ventilation space

3. Economy 2015-08-293 More expensive than conventional units (30-50%) Very good heat recovery Increased basis for environmentally friendly electricity due to CHP Equal investment costs (in this case) Lower operating costs (in this case)

4. Components

5. Evaporative air coolerDrying rotor

6. Evaporative cooler If you add 1 gram of water to 1 kg of air you reduce the air temperature 2,5°C Drying rotor If you take away 1 gram of water from 1 kg of air you increase the air temperature 3,3°C Physics

7. 30 ºC 10 g/kg 40 ºC 7 g/kg 25 ºC 7 g/kg 25 ºC 10 g/kg 20 ºC 12 g/kg 17,5 ºC 10 g/kg 55 ºC 12 g/kg 35ºC 12 g/kg 45ºC 15 g/kg Function

8. ROOM 45,055,035,020,025,0 15,512,5 10,5 Delta T =7,5 Delta X =0,5 30,040,025,017,5 10,07,0 10,0

9. Heating demand of 540 MWh in a building 80% efficiency for a conventional ventilation gives a need of 108 MWh 90% efficiency with desiccant cooling system provides a heating requirement of 54 MWh In summer it need about 30 - 45 MWh of heat to create desiccant cooling 0,7 – 1,0 kWh of heat to generate 1 kWh of cooling Example

10. Consumption

13. www.malarenergi.se www.malarenergi.se henrik.nasstrom@malarenergi.se