recordChiller

Record for chiller model

Extends from Modelica.Icons.Record (Icon for records).

Information

This record provides the set of sizing and operating parameters for the classes within Buildings.Templates.Components.Chillers. It is composed of a set of parameters corresponding to the design (selection) conditions and a sub-record per providing the chiller performance data. The design capacity is used to parameterize the chiller model. The capacity (and power) computed from the external performance data file is automatically scaled by the chiller model to match the value provided at design conditions.

Note that the design value for condenser cooling fluid (e.g., condenser water) mass flow rate is only required for water-cooled chillers. Air-cooled chillers use a default outdoor air flow assignment since the chiller model doesn't explicitly calculate fan power based on outdoor air flow and condenser pressure drop. Instead, fan power is integrated into the chiller power computed from the performance data. This is because both US (AHRI Standard 550/590) and European (EN14511) chiller performance rating standards incorporate fan power into the rated total input power.

Parameters

TypeNameDefaultDescription
Buildings.Fluid.Chillers.ModularReversible.Data.TableData2DLoadDep.Genericper
Modelica.Units.SI.PowerP_min0Minimum power when system is enabled with compressor cycled off
Configuration
Buildings.Templates.Components.Types.ChillertypType of chiller
Nominal condition
Modelica.Units.SI.MassFlowRatemChiWat_flow_nominalCHW mass flow rate
Modelica.Units.SI.MassFlowRatemCon_flow_nominalCondenser cooling fluid (e.g. CW) mass flow rate
Modelica.Units.SI.HeatFlowRatecap_nominalCooling capacity
Modelica.Units.SI.PressureDifferencedpChiWat_nominalCHW pressure drop
Modelica.Units.SI.PressureDifferencedpCon_nominalCondenser cooling fluid pressure drop
Modelica.Units.SI.TemperatureTChiWatSup_nominalCHW supply temperature
Modelica.Units.SI.TemperatureTCon_nominalCondenser entering or leaving fluid temperature (depending on per.use_TConOutForTab)