Outside Air System
An Outside Air System manages the introduction of fresh outdoor air into a building, promoting indoor air quality. This system typically includes components like outdoor air fans, dampers, and filters. Outside Air System to simulate its role in providing ventilation, controlling humidity, and optimizing indoor environmental conditions for occupant comfort and well-being.
Heat Exchanger
Heat Exchanger Type
Specify from None, Plate, or Rotary. Heat exchanger type affects the modelling of frost control options and supply air outlet temperature control. For rotary heat exchangers, the rotational speed varies to control frost formation or the supply air outlet temperature. For plate exchangers, an air bypass around the heat exchanger is used to obtain the desired effect.
Sizing
Economizer Control Type
Specify the Economizer Control Type:
Fixed Dry Bulb
Sets outdoor airflow rate to a minimum if outdoor air temperature exceeds a specified dry-bulb limit.
Differential Dry Bulb
Minimizes outdoor airflow when outdoor air dry-bulb temperature surpasses return air dry-bulb.
Fixed Enthalpy
Compares enthalpy limits, reducing outdoor airflow if outdoor enthalpy exceeds the specified limit.
Differential Enthalpy
Minimizes outdoor airflow if outdoor air enthalpy surpasses return air enthalpy.
Electronic Enthalpy
Calculates humidity ratio limit based on outdoor air dry-bulb temperature, reducing airflow if the actual humidity ratio exceeds the calculated limit.
Fixed Dew Point And Dry Bulb
Reduces outdoor airflow if either outdoor dewpoint or dry-bulb temperature exceeds specified high limits.
Differential Dry Bulb And Enthalpy
Enables control based on both Differential Dry Bulb and Differential Enthalpy strategies.
No Economizer
Disables economizer, keeping outdoor airflow at the minimum throughout the simulation. In all control types, user-entered limits for dry-bulb temperature, enthalpy, humidity ratio, and dewpoint are checked.
Demand-Controlled Ventilation
Specify if the air loop supports Demand-Controlled Ventilation (DCV), allowing variation of outdoor air based on the actual number of occupants in spaces.
Sizing Method
Specify the Sizing Method:
Autosize: Automatically determines the appropriate size based on specified parameters.
Manual: Requires manual input of sizing parameters according to specific requirements.
Only available on Enterprise Plans. Please reach out to support@speckel.io for further support.
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