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Twin Wheel Applications

Twin Wheel Applications. Cold and dry air in demand!. RH 50 %. 16 º C. 20 º C. RH 75 %. In modern buildings of today, the need for a controlled temperature with an equally controlled humidity is increasing. Typical cooling and dehumidification enviroment.

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Twin Wheel Applications

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  1. Twin Wheel Applications

  2. Cold and dry air in demand! RH 50 % 16 ºC 20 ºC RH 75 % In modern buildings of today, the need for a controlled temperature with an equally controlled humidity is increasing

  3. Typical cooling and dehumidification enviroment Typical cooling and dehumidification enviroment Office spaces: * High internal heat load * Internal humidity production * Variations in climate and humidity = * High indoor temperature * A high cooling demand * Periodical need for de-humidification

  4. Chilled beam applications • Known issues in chilled beam applications: • Humidity control • ”Rain” • Indoor Temperature

  5. Traditional solutions are costly. Traditional solutions are costly.

  6. Cold and dry air with an extra twist - Free of charge!

  7. Hygroscopic Rotor Sensible Rotor Double rotors – Double gains! Double rotors – Double gains! Cooling Coil

  8. Calculating and comparing 1m3/s, 28 ºC at 50 % RH 24 ºC 28 ºC 12 ºC 16 ºC 28.5 kW 4.5 kW Total effect: 33 kW

  9. Adding a rotary heat exchanger 1m3/s, 28 ºC at 50 % RH 24 ºC 27.2 ºC 28 ºC 24.8 ºC 12 ºC 16 ºC 20 kW 4.5 kW Total effect: 24.5 kW

  10. Twin Wheel - Cutting power, cutting costs 1m3/s, 28 ºC at 50 % RH 26.2º C 19 ºC 24 ºC 28 ºC 20.8 ºC 12 ºC 16 ºC 14 kW Total effect: 14 kW

  11. Twin Wheel Potential Twin Wheel vs. Cooler and heater: Cooling effect –50 % Heating effect eliminated Total effect –58 % Added hyg. Rotor: Cooling effect -30 % Heating effect eliminated. Total effect -40 %

  12. Humidity control - Fläkt Woods test results 25.5 ºC 10 g/kg 50 % RH 20.7 ºC 10 g/kg 69 % RH 23.7 ºC 15.4 g/kg 85 % RH Temp Efficiency Rotor 1 76 % Temp Efficiency Rotor 2 30 % 24.3 ºC 15.4 g/kg 81.8 % RH 21.6 ºC 10.2 g/kg 65.3 RH 11 ºC 8 g/kg 100 % RH 15.4 ºC 8 g/kg 76 % RH 16 ºC 8 g/kg 72 % RH

  13. Twin Wheel system reheat side 79% efficiency is more than enough!

  14. Twin Wheel system cooling side Entering condition for cooling coil

  15. Twin Wheel System cooling coil Cooling coils are expensive to run. The Twin Wheel system has great potential to keep down requirement effects and thereby save cooling costs!

  16. Two rotors – Increased pressure drop? Grid power: 4.1 kW Pressure drop: 560 Pa Grid power: 4.6 kW Pressure drop 621 Pa

  17. Twin Wheel optimal performance the year round! • Not only is the Twin Wheel system saving your cooling costs, it’ll save costs for heating during winter time as well! • Thank’s to the dual rotors, the need for additional heating can be taken out of the equation! • Even using the widest foil spacing we get more than enough reheat!

  18. Twin Wheel and Chilled Beams • Energy efficient solution! • Ensuring quality of the indoor climate • No unwanted temperature rises • No more rain!

  19. Twin Wheel – A summary • The twin wheel system can make substantial energy savings. 50% of cooling and 100% of reheat. Modern and energy efficient solution. • To be of interest there must be a cooling and / or de-humidification need. • The system offers excellent heat recovery during winter. Again saving costs for reheating. • Chilled beam systems are a typical application. Twin Wheel will improve performance!

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