.Buildings.UsersGuide.ReleaseNotes.Version_1_3_build1 .Buildings.UsersGuide.ReleaseNotes.Version_1_3_build1In version 1.3 build 1, models for direct evaporative cooling coils with multiple stages or with a variable speed compressor have been added. This version also contains improvements to the fan and pump models to better treat zero mass flow rate. Various other improvements have been made to improve the numerics and to use consistent variable names. A detailed list of changes is shown below.
The following new libraries have been added:
| Buildings.Fluid.DXSystems | Library with direct evaporative cooling coils. |
The following new components have been added to existing libraries:
| Buildings.Examples | |
| Buildings.Examples.ChillerPlant.DataCenterContinuousTimeControl | Added chilled water plant model with continuous
time control that replaces the discrete time control in
Buildings.Examples.ChillerPlant.DataCenterDiscreteTimeControl. |
| Buildings.Utilities | |
| Buildings.Utilities.Psychrometrics.Functions.X_pSatpphi | Function that computes moisture concentration based on saturation pressure, total pressure and relative humidity. |
| Buildings.Utilities.Psychrometrics.TWetBul_TDryBulPhi | Block that computes the wet bulb temperature for given dry bulb temperature, relative humidity and atmospheric pressure. |
| Buildings.Utilities.Psychrometrics.WetBul_pTX | Block that computes the temperature and mass fraction at the wet bulb state for given dry bulb temperature, species concentration and atmospheric pressure. |
The following existing components have been improved in a backward compatible way:
| Buildings.BoundaryConditions | |
| Buildings.BoundaryConditions.WeatherData.ReaderTMY3 | Added computation of the wet bulb temperature.
Computing the wet bulb temperature introduces a nonlinear equation.
As we have not observed an increase in computing time because of
computing the wet bulb temperature, it is computed by default. By
setting the parameter computeWetBulbTemperature=false,
the computation of the wet bulb temperature can be removed. |
| Buildings.Controls | |
| Buildings.Controls.SetPoints.OccupancySchedule | Added pre operator and relaxed
tolerance in assert statement. |
| Buildings.Fluid | |
| Buildings.Fluid.Movers.FlowControlled_dp Buildings.Fluid.Movers.FlowControlled_m_flow Buildings.Fluid.Movers.SpeedControlled_Nrpm Buildings.Fluid.Movers.SpeedControlled_y |
Reformulated implementation of efficiency model to avoid a division by zero at zero mass flow rate for models in which a user specifies a power instead of an efficiency performance curve. |
| Buildings.Utilities | |
| Buildings.Utilities.Psychrometrics.TWetBul_TDryBulXi | Added option to approximate the wet bulb temperature using an explicit equation. Reformulated the original model to change the dimension of the nonlinear system of equations from two to one. |
The following existing components have been improved in a non-backward compatible way:
| Buildings.BoundaryConditions | |
|
Buildings.BoundaryConditions.WeatherData.ReaderTMY3 Buildings.BoundaryConditions.Types |
Improved the optional inputs for the radiation data global horizontal, diffuse horizontal and direct normal radiation. If a user specifies two of them, the third will be automatically calculated. |
| Buildings.BoundaryConditions.SkyTemperature.BlackBody | Renamed radHor to
radHorIR to indicate that the radiation is in the
infrared spectrum. |
| Buildings.Fluid | |
|
Buildings.Airflow.Multizone.BaseClasses.DoorDiscretized Buildings.Airflow.Multizone.DoorDiscretizedOpen Buildings.Airflow.Multizone.DoorDiscretizedOperable Buildings.Airflow.Multizone.Orifice Buildings.Airflow.Multizone.ZonalFlow_ACS Buildings.Fluid.Actuators.BaseClasses.PartialDamperExponential Buildings.Fluid.Actuators.Dampers.MixingBox Buildings.Fluid.Actuators.Dampers.VAVBoxExponential Buildings.Fluid.BaseClasses.PartialResistance Buildings.Fluid.Interfaces.TwoPortHeatMassExchanger Buildings.Fluid.Movers.BaseClasses.PowerInterface Buildings.Fluid.Storage.BaseClasses.Buoyancy Buildings.Fluid.HeatExchangers.BaseClasses.MassExchange |
Renamed protected parameters for consistency with
the naming conventions. In previous releases, fluid properties had
the suffix 0 or _nominal instead of
_default when they where computed based on the medium
default properties. |
|
Buildings.Fluid.Sensors.SensibleEnthalpyFlowRate Buildings.Fluid.Sensors.LatentEnthalpyFlowRate |
Moved computation of parameter i_w to
new base class Buildings.Fluid.BaseClasses.IndexWater
The value of this parameter is now assigned dynamically and does
not require to be specified by the user. |
| Buildings.Fluid.Storage.BaseClasses.ThirdOrderStratifier | Removed unused protected parameters
sta0 and cp0. |
| Buildings.Examples | |
|
Buildings.Examples.ChillerPlant.DataCenterDiscreteTimeControl Buildings.Examples.ChillerPlant.BaseClasses.Controls.TrimAndRespond Buildings.Examples.ChillerPlant.BaseClasses.Controls.ZeroOrderHold |
Re-implemented the controls for setpoint reset.
Revised the model TrimAndRespond and deleted the model
ZeroOrderHold. Improved the documentation. |
The following critical errors have been fixed (i.e., errors that can lead to wrong simulation results):
| Buildings.Examples | |
| Buildings.Examples.ChillerPlant.DataCenterDiscreteTimeControl | Fixed error in wet bulb temperature. The previous version used a model to compute the wet bulb temperature that takes as an input the relative humidity, but required mass fraction as an input. |
The following uncritical errors have been fixed (i.e., errors that do not lead to wrong simulation results, e.g., units are wrong or errors in documentation):
| Buildings.BoundaryConditions | |
|
Buildings.BoundaryConditions.WeatherData.ReaderTMY3 Buildings.BoundaryConditions.SkyTemperature.BlackBody |
Renamed radHor to
radHorIR. |
| Buildings.Fluid | |
| Buildings.Fluid.BaseClasses.FlowModels.Examples.InverseFlowFunction | Fixed error in the documentation. |
| Buildings.Fluid.Interfaces.TwoPortHeatMassExchanger | Fixed broken link in the documentation. |
| Buildings.Fluid.Movers.BaseClasses.Characteristics.powerParameters | Fixed wrong displayUnit and
max attribute for power. |
| Buildings.Fluid.MixingVolumes | In documentation, removed reference to the
parameter use_HeatTransfer which no longer
exists. |
| Buildings.HeatTransfer | |
| Buildings.HeatTransfer.Windows.Functions.glassPropertyUncoated | Improved the documentation for implementation and added comments for model limitations. |