modelPartialAHU
Defines necessary parameters and connectors
Information
Base class to provide connectors. Thus, it is possible to declare parameters in a general way in superior building model and give the opportunity whether an AHU exist or does not.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Settings for State Machines | |||
| Real | clockPeriodGeneric | 1800 | time period in s for sampling (= converting time-continous into time-discrete) input variables. Recommendation: half of the duration of one simulation interval |
| AHU Modes | |||
| Boolean | heating | true | Heating Function of AHU |
| Boolean | cooling | true | Cooling Function of AHU |
| Boolean | dehumidificationSet | if heating and cooling then true else false | Dehumidification Function of AHU (Cooling and Heating must be enabled) |
| Boolean | humidificationSet | if heating and cooling then true else false | Humidification Function of AHU (Cooling and Heating must be enabled) |
| Boolean | HRS | true | Is a HeatRecoverySystem physically integrated in the AHU? |
| Boolean | use_Vflow_in_extractAir | false | If incoming volume flow of outdoor/supply air should not equal the volume flow of extract air, set this parameter to true |
| Settings AHU Value | |||
| Real | BPF_DeHu | 0.2 | By-pass factor of cooling coil during dehumidification. Necessary to calculate the real outgoing enthalpy flow of heat exchanger in dehumidification mode taking the surface enthalpy of the cooling coil into account |
| Real | efficiencyHRS_enabled | 0.8 | efficiency of HRS in the AHU modes when HRS is enabled |
| Real | efficiencyHRS_disabled | 0.2 | taking a little heat transfer into account although HRS is disabled (in case that a HRS is physically installed in the AHU) |
| Fans › Constant Assumptions | |||
| Modelica.Units.SI.Pressure | dp_sup | 800 | pressure difference over supply fan |
| Modelica.Units.SI.Pressure | dp_eta | 800 | pressure difference over extract fan |
| Modelica.Units.SI.Efficiency | eta_sup | 0.7 | efficiency of supply fan |
| Modelica.Units.SI.Efficiency | eta_eta | 0.7 | efficiency of extract fan |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | dehumidification | ||
| Boolean | humidification | ||
| Modelica.Blocks.Interfaces.RealInput | Vflow_in | m3/s | |
| Modelica.Blocks.Interfaces.RealInput | T_outdoorAir | K | |
| Modelica.Blocks.Interfaces.RealInput | X_outdoorAir | kg of water/kg of dry air | |
| Modelica.Blocks.Interfaces.RealInput | T_extractAir | K | |
| Modelica.Blocks.Interfaces.RealInput | phi_extractAir | relativ Humidity [Range: 0...1] | |
| Modelica.Blocks.Interfaces.RealOutput | phi_supply | relativ Humidity [Range: 0...1] | |
| Modelica.Blocks.Interfaces.RealInput | T_supplyAir | K (use as PortIn) | |
| Modelica.Blocks.Interfaces.RealInput[2] | phi_supplyAir | relativ Humidity [Range: 0...1] (Vector: [1] min, [2] max) | |
| Modelica.Blocks.Interfaces.RealOutput | QflowC | The absorbed cooling power supplied from a cooling circuit [W] | |
| Modelica.Blocks.Interfaces.RealOutput | QflowH | The absorbed heating power supplied from a heating circuit [W] | |
| Modelica.Blocks.Interfaces.RealOutput | Pel | The consumed electrical power supplied from the mains [W] | |
| Modelica.Blocks.Interfaces.RealOutput | Vflow_out | supply volume flow in m3/s | |
| Modelica.Blocks.Interfaces.RealOutput | T_supplyAirOut | K (use as PortOut) | |
| Modelica.Blocks.Interfaces.RealInput | Vflow_in_extractAir | Volume flow of extract air |
Revisions
-
February,
2016 by Philipp Mehrfeld:
Model implemented