open-ideas · jelgerjansen · Aug 20, 2025 · Aug 14, 2025 · Aug 14, 2025 · Aug 14, 2025
diff --git a/IDEAS/UsersGuide/Acknowledgements.mo b/IDEAS/UsersGuide/Acknowledgements.mo
@@ -31,18 +31,28 @@ The European Commission (2024-2028), through the PhD scholarship of Anna Dell'Is
 The European Commission (2024-2028), through the PhD scholarship of Louis Hermans, the research grant of Lone Meertens, and the Horizon Europe 'SEEDS' project (no. 101138211) 
 </li>
 <li>
+The Agency for Innovation by Science and Technology in Flanders (VLAIO), through the research grant of Klaas De Jonge (HBC.2023.0488)
+</li>
+<li>
 KU Leuven (2021-2025), through the PhD scholarship of Lucas Verleyen, the research grant of Javier Arroyo, and the 'TECHPED' project (C24M/021/21)
 </li>
 <li>
-Research Foundation Flanders (FWO) (2020-2024), through the PhD scholarship of Jelger Jansen
+Research Foundation Flanders (FWO) (2020-2024), through the PhD scholarship of Jelger Jansen (1SC9721N|1SC9723N)
 </li>
 <li>
 KU Leuven (2019-2021), through the research grant of Filip Jorissen, and the C3 project (C32/18/063)
 </li>
 <li>
+Research Foundation Flanders (FWO) (2019-2023), through the PhD scholarship of Klaas De Jonge (1SA7619N)
+</li>
+<li>
 The European Commission (2016-2021), through the research grant of Filip Jorissen and Damien Picard, and the Horizon 2020 'MPC-:GT - hybridGEOTABS' project (no. 723649)
 </li>
 <li>
+The European Commisson, the European Regional Development Fund (ERDF), Flanders Innovation and Entrepreneurship, and the Province of Limburg (2015-2018), through the research grant of Glenn Reynders
+and the 'EFRO-SALK GeoWatt' project
+</li>
+<li>
 The Agency for Innovation by Science and Technology in Flanders (IWT-VLAIO) (2014-2018), through the research grant of Arnout Aertgeerts, and the 'Living Lab De Schipjes’ project
 </li>
 <li>
@@ -55,11 +65,13 @@ The European Commission (2012-2015), through the PhD scholarship of Roel De Coni
 The Agency for Innovation by Science and Technology in Flanders (IWT) and WTCB (2011-2016), through the IWT-VIS 'Smart Geotherm' project
 </li>
 <li>
+VITO (Flemish Institute for Technological Developments) (2011-2015), through the PhD scholarship of Glenn Reynders
+</li>
+<li>
 3E (2010-2014), through co-funding the PhD scholarship of Roel De Coninck
 </li>
 <li>
 The KU Leuven Energy Institute (2010-2014), through the PhD scholarships of Ruben Baetens, Roel De Coninck, Juan van Roy and Bart Verbruggen, and the ‘Optimal Energy Networks in Buildings' project
-
 </li>
 </ul>
 <h4>Contributors</h4>

diff --git a/IDEAS/UsersGuide/ReleaseNotes/Version_4_0_0.mo b/IDEAS/UsersGuide/ReleaseNotes/Version_4_0_0.mo
@@ -3,7 +3,186 @@ class Version_4_0_0 "Version_4_0_0"
   extends Modelica.Icons.ReleaseNotes;
   annotation (Documentation(info="<html>
 <p>
-To be completed...
+IDEAS v4.0.0 has been released on August 20, 2025.
 </p>
+<h4>Highlights</h4>
+<ul>
+<li>
+A new IDEAS logo has been developed and added to the README and Modelica package.
+</li>
+<li>
+The <code>IDEAS.Buildings.Data</code> package has been revised, 
+and a new library of building envelope constructions with different insulation levels has been added.
+This package allows the selection of building constructions (Constructions, Frames, Glazing, Insulation, Materials) 
+based on their classification in the EPC framework.
+</li>
+<li>
+Significant improvements to the <code>IDEAS.Examples.Tutorial.DetailedHouse</code> tutorial.
+</li>
+<li>
+A two-port interzonal airflow model has been developed, allowing to model the stack effect in buildings.
+</li>
+<li>
+The DHW tap model has been significantly improved (<code>IDEAS.Fluid.Taps</code>).
+</li>
+<li>
+A dynamic Photovoltaic-Thermal (PVT) model has been added (<code>IDEAS.Fluid.PVT</code>), 
+including an extensive documentation and validation.
+</li>
+</ul>
+
+<h4>Detailed release notes</h4>
+<ul>
+<li>
+<li>
+Merged latest version of IBPSA library has been merged (commit b6cff3bfe523804f88615c885326b244ba2d923a).
+</li>
+<li>
+Added a dynamic Photovoltaic-Thermal (PVT) collector model (<code>IDEAS.Fluid.PVT</code>), 
+including an extensive documentation and validation.
+</li>
+<li>
+Revised and corrected the embedded pipe model.
+</li>
+<li>
+Added a redesigned IDEAS logo to the README and Modelica package.
+</li>
+<li>
+Updated the wind speed modifier calculation according to ASHRAE2005 and changed the 
+default local terrain type to <code>Unshielded</code> in 
+<code>IDEAS.BoundaryConditions.Interfaces.PartialSimInfoManager</code>.
+</li>
+<li>
+Cleaned up and extended the IDEAS User's Guide.
+</li>
+<li>
+Updated some models of <code>IDEAS.Buildings.Components</code> to avoid scripting errors in OpenModelica.
+</li>
+<li>
+Updated <code>IDEAS.Examples.IBPSA.SingleZoneResidentialHydronicHeatPump</code> to fix the compatibility with OpenModelica.
+</li>
+<li>
+Corrected errors in <code>IDEAS.Buildings.Data.Constructions.FloorOnGround</code>. 
+Due to this change, the <code>locGain</code> parameter of <code>conTypFlo</code> 
+in <code>IDEAS.Examples.IBPSA.SingleZoneResidentialHydronicHeatPump</code> had to be redeclared.
+</li>
+<li>
+Added <code>OuterWall</code> as a possible construction type for a floor.
+</li>
+<li>
+Cleaned up the repository by removing unused scripts, files, and images, 
+and replacing equation images with inline equations.
+</li>
+<li>
+Improved the graphical representation of <code>IDEAS.Examples.DetailedResidentialNoHeating</code> 
+in the Diagram view of Dymola.
+</li>
+<li>
+Added missing <code>m_flow</code> connections in <code>IDEAS.Buildings.Components.Shading.Box</code>.
+</li>
+<li>
+Updated the existing IDEAS building constructions (<code>IDEAS.Buildings.Data.Constructions</code>) 
+and added new building envelope data packages (Constructions, Frames, Glazing, Insulation, Materials).
+This package allows the selection of building constructions based on their classification in the EPC framework.
+</li>
+<li>
+Removed import \"package\" statements from some models and explicitly replaced it by <code>Modelica.package</code>, 
+e.g. <code>Modelica.Units.SI</code>.
+</li>
+<li>
+Updated models to avoid translation warnings when using <code>IDEAS.Buildings.Components.Examples.CavityInternalWall</code>.
+</li>
+<li>
+Moved the existing tutorial to <code>IDEAS.Examples.Tutorial.DetailedHouse</code> 
+and thoroughly revised its content.
+</li>
+<li>
+Corrected ventilation mass flow rate calculation and updated nominal pressure drop
+in <code>IDEAS.Templates.Ventilation.ConstantAirFlowRecup</code>.
+</li>
+<li>
+Updated <code>Medium</code> package implementation in <code>IDEAS.Buildings.Components.Interfaces.PartialZone</code>
+to avoid errors with <code>IDEAS.Buildings.Components.RectangularZoneTemplate</code>.
+</li>
+<li>
+Changed unit of parameter <code>dT_nominal</code> to <code>Modelica.Units.SI.TemperatureDifference</code>
+in <code>IDEAS.Fluid.Actuators.Valves.Simplified.Thermostatic3WayValve</code>.
+</li>
+<li>
+Updated calculation of transmission design losses in the <code>IDEAS.Buildings.Components</code> models 
+to allow custom indoor design temperatures.
+</li>
+<li>
+Removed invalid <code>Shading</code> for <code>IDEAS.Buildings.Components.Shading.Interfaces.ShadingType</code>.
+</li>
+<li>
+Replaced non-linear limiter block in screen models (<code>IDEAS.Buildings.Components.Shading</code>) 
+by a proper control signal implementation and assert.
+</li>
+<li>
+Updated scripts and BuildingsPy for merging IBPSA into IDEAS.
+</li>
+<li>
+Updated view factor asserts in 
+<code>IDEAS.Buildings.Components.BaseClasses.RadiativeHeatTransfer.ZoneLwDistribution</code> 
+to guard against non-physical geometries.
+</li>
+<li>
+Added <code>T_start_ground</code> parameter to the <IDEAS.Buildings.Components.SlabOnGround</code> model.
+</li>
+<li>
+Revised the DHW tap model (<code>IDEAS.Fluid.Taps</code>).
+</li>
+<li>
+Fixed wrong construction type and zone height for <code>IDEAS.Examples.PPD12.Structure</code>.
+</li>
+<li>
+Removed duplicate parameter declarations in <code>IDEAS.Buildings.Components.Interfaces.PartialZone</code>
+and <code>IDEAS.Fluid.Actuators.Valves.Simplified.ThreeWayValveMotor</code>.
+</li>
+<li>
+Fixed bug in <code>IDEAS.Templates.Heating.BaseClasses.HysteresisHeating</code>.
+</li>
+<li>
+Updated the CI runner used for unit tests.
+</li>
+<li>
+Created a BOPTEST branch which is up-to-date with the master branch except for the expandable connectors (see change below)
+as OpenModelica does not yet support expandable connectors.
+</li>
+<li>
+Change <code>IDEAS.Buildings.Components.Interfaces</code> connectors to expandable
+to avoid errors in Wolfram System Modeler and to improve compatibility with the Modelica language specification.
+</li>
+<li>
+Added a file containing the Belpex spot price for 2021.
+</li>
+<li>
+Added a weather file containing data measured at the Vliet building (Heverlee, Belgium) in 2021.
+</li> 
+<li>
+Added a two-port interzonal airflow implementation to model stack-effect. 
+On top of this, an assert was added to do a first check of the floor heights as provided by the user.
+</li>
+<li>
+Added cavity support for ceilings and floors.
+</li>
+<li>
+Modelled air layer between screen and window that heats up.
+</li>
+<li>
+Updated several models to be compatible with OpenModelica.
+</li> 
+<li>
+Updated U-value of window frames (<code>IDEAS.Buildings.Data.Frames</code>) and added references.
+</li>
+<li>
+Updated material properties (<code>IDEAS.Buildings.Data</code>) and added references.
+</li>
+<li>
+Fixed illegal connections for Modelon Impact in
+<code>IDEAS.Examples.TwinHouses.BaseClasses.Structures.TwinhouseN2</code>.
+</li>
+</ul>
 </html>"));
 end Version_4_0_0;
diff --git a/IDEAS/UsersGuide/ReleaseNotes/Version_x.mo b/IDEAS/UsersGuide/ReleaseNotes/Version_x.mo
@@ -0,0 +1,21 @@
+within IDEAS.UsersGuide.ReleaseNotes;
+class Version_x "Version_x"
+  extends Modelica.Icons.ReleaseNotes;
+  annotation (Documentation(info="<html>
+<p>
+<i>Notes for the next release.</i>
+</p>
+<h4>Highlights</h4>
+<ul>
+<li>
+<i>To be completed just before the new release.</i>
+</li>
+</ul>
+
+<h4>Detailed release notes</h4>
+<ul>
+<li>
+</li>
+</ul>
+</html>"));
+end Version_x;
diff --git a/IDEAS/UsersGuide/ReleaseNotes/package.mo b/IDEAS/UsersGuide/ReleaseNotes/package.mo
@@ -9,7 +9,7 @@ on the IDEAS library.
 </p>
 <ul>
 <li>
-<a href=\"modelica://IDEAS.UsersGuide.ReleaseNotes.Version_4_0_0\">Version 4.0.0</a> (August 15, 2025)
+<a href=\"modelica://IDEAS.UsersGuide.ReleaseNotes.Version_4_0_0\">Version 4.0.0</a> (August 20, 2025)
 </li>
 <li>
 <a href=\"modelica://IDEAS.UsersGuide.ReleaseNotes.Version_3_0_0\">Version 3.0.0</a> (May 3, 2022)

diff --git a/IDEAS/UsersGuide/ReleaseNotes/package.order b/IDEAS/UsersGuide/ReleaseNotes/package.order
@@ -1,3 +1,4 @@
+Version_x
 Version_4_0_0
 Version_3_0_0
 Version_2_2_2

diff --git a/IDEAS/package.mo b/IDEAS/package.mo
@@ -5,17 +5,21 @@ annotation (
   uses(Modelica(version="4.0.0")),
   Icon(graphics={Bitmap(extent={{-100,-80},{100,80}}, fileName=
             "modelica://IDEAS/Resources/Images/IDEAS-logo-icon.png")}),
-  version="3.0.0",
-  versionDate="2022-05-03",
-  dateModified = "2022-05-03",
+  version="4.0.0",
+  versionDate="2025-08-20",
+  dateModified="2025-08-20",
   conversion(
  from(version={"0.2"},
       script="modelica://IDEAS/Resources/Scripts/convertIdeas030to100.mos",
       to="2.2.1"), from(version="2.2.1", script=
           "modelica://IDEAS/Resources/Scripts/ConvertFromIDEAS_2.2.1.mos")),
   Documentation(info="<html>
-<p>Licensed by KU Leuven and 3E.</p>
-<p>Copyright &copy; 2013-2025, KU Leuven and 3E. </p>
+<p>
+Licensed by KU Leuven and 3E.
+</p>
+<p>
+Copyright &copy; 2013-2025, KU Leuven and 3E.
+</p>
 <p>
 This Modelica package is <u>free</u> software and the use is completely at <u>your own risk</u>.
 For license information, view our <a href=\"modelica://IDEAS.UsersGuide.License\">License</a>.

diff --git a/README.md b/README.md
@@ -4,7 +4,7 @@
   <source media="(prefers-color-scheme: light)" srcset="IDEAS/Resources/Images/IDEAS-logo-light.png" style="height:120px;">
   <img src="IDEAS/Resources/Images/IDEAS-logo-light.png" alt="IDEAS Logo" style="height:120px;">
 </picture>
-<b>v3.0.0</b>
+<b>v4.0.0</b>
 </div>
 <br/>
 
@@ -85,7 +85,7 @@ year = {2018}
 ```
 
 ## Release history
-IDEAS v3.0.0 was released on May 3, 2022. This release includes an update to the Modelica Standard Library MSL 4.0.0.
+IDEAS v4.0.0 was released on August 20, 2025.
 Detailed release notes are available within the library under the following link:
 [ReleaseNotes](https://github.com/open-ideas/IDEAS/tree/master/IDEAS/UsersGuide/ReleaseNotes).
 Notes for the previous releases notes can also be found there.
-Original file line number
+Diff line change
@@ Expand Up / @@ -9,7 +9,7 @@ on the IDEAS library. @@
     </p>
     <ul>
     <li>
-    <a href=\"modelica://IDEAS.UsersGuide.ReleaseNotes.Version_4_0_0\">Version 4.0.0</a> (August 15, 2025)
+    <a href=\"modelica://IDEAS.UsersGuide.ReleaseNotes.Version_4_0_0\">Version 4.0.0</a> (August 20, 2025)
     </li>
     <li>
     <a href=\"modelica://IDEAS.UsersGuide.ReleaseNotes.Version_3_0_0\">Version 3.0.0</a> (May 3, 2022)
@@ Expand Down @@