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Examples of system configuration and operating mode

Operation 12 h/d | 20 % fresh air | with heat recovery - example 1

Operation 12 h/d | 20 % fresh air |
with heat recovery

Features

  • Air flow Q = 31,600 m³/h
  • Heat recovery ζ = 73 % sensitive, bypass on/off
  • Isothermal humidification from electrical source
  • Proportion of fresh air = 20 %
  • Proportion of recirculated air = 80 %
  • Constant airflow management (CAV)
  • Operation 12 hours/day

 

Advantage: Efficient operation due to heat recovery

Disadvantage: No sufficient air exchange to reduce the virus load and lower the risk of infection

Operation 24 h/d | 100 % fresh air | without heat recovery - example 2

Operation 24 h/d | 100 % fresh air |
without heat recovery

Features

  • Air flow Q = 31,600 m³/h
  • Heat recovery deactivated (bypass)
  • Isothermal humidification from electrical source
  • Proportion of fresh air = 100 %
  • Proportion of recirculated air = 0 %
  • Constant airflow management (CAV)
  • Operation 24 hours/day

 

Advantage: Optimal air exchange to reduce the virus load and lower the risk of infection

Disadvantage: No efficient operation, up to + 226 % higher total energy demand

Operation 24 h/d | 100 % fresh air | with heat recovery - example 3

Operation 24 h/d | 100 % fresh air |
with heat recovery

Features

  • Air flow Q = 31,600 m³/h
  • Heat recovery ζ = 73 % sensitive, bypass on/off
  • Adiabatic humidification
  • Proportion of fresh air = 100 %
  • Indirect evaporative cooling with humidity recovery
  • Proportion of recirculated air = 0 %
  • Variable airflow management (VAV)
  • Operation 24 hours/day

 

Advantage: Efficient operation through heat recovery with optimum air exchange to reduce the virus load and lower the risk of infection