IEA EBC Annex 60

Annex60.UsersGuide

User's Guide

Information

The Modelica Annex60 library is a free open-source library with classes (models, functions, etc.) that codify and demonstrate best practices for the implementation of models for building and community energy and control systems. The library is developed within the Annex 60 project http://www.iea-annex60.org of the International Energy Agency's Energy in Buildings and Communities Programme.

Many models are based on models from the package Modelica.Fluid and use the same ports to ensure compatibility with models from that library. However, a design change is that models from the Annex60 library do not require the use of Modelica.Fluid.System as applications in buildings often have multiple fluids with largely varying flow rates, and therefore a global declaration is impractical.

The development page for this library has been https://github.com/iea-annex60/modelica-annex60. Future development will continue on https://github.com/ibpsa/modelica. We welcome contributions from different users to further advance this library, whether it is through collaborative model development, through model use and testing or through requirements definition or by providing feedback regarding the model applicability to solve specific problems.

The library has the following User's Guides:

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Package Content

Name	Description
Conventions	Conventions
ReleaseNotes	Release notes
Contact	Contact
Acknowledgements	Acknowledgements
License	Modelica License 2
Copyright	Copyright

Annex60.UsersGuide.Conventions

Conventions

Information

This library follows the conventions of the Modelica Standard Library, which are as follows:

Note, in the html documentation of any Modelica library, the headings "h1, h2, h3" should not be used, because they are utilized from the automatically generated documentation/headings. Additional headings in the html documentation should start with "h4".

In the Modelica package the following conventions are used:

1. Class and instance names are written in upper and lower case letters, e.g., "ElectricCurrent", and may contain numbers. An underscore is only used at the end of a name to characterize a lower or upper index, e.g., "pin_a".
2. Class names start always with an upper case letter.
3. Instance names, i.e., names of component instances and of variables (with the exception of constants), start usually with a lower case letter with only a few exceptions if this is common sense (such as "T" for a temperature variable).
4. Constant names, i.e., names of variables declared with the "constant" prefix, follow the usual naming conventions (= upper and lower case letters) and start usually with an upper case letter, e.g. UniformGravity, SteadyState, with only few exceptions such as "pi" and "h_fg".
5. The two connectors of a domain that have identical declarations and different icons are usually distinguished by "_a", "_b" or "_p", "_n", e.g., Flange_a/Flange_b, HeatPort_a, HeatPort_b.
6. The instance name of a component is always displayed in its icon (= text string "%name") in blue color. A connector class has the instance name definition in the diagram layer and not in the icon layer. If displayed, parameter values, e.g., resistance, mass, gear ratio, are displayed in the icon in black color in a smaller font size as the instance name.
7. Packages have usually the following subpackages:
   • UsersGuide containing an overall description of the library and how to use it.
   • Examples containing models demonstrating the usage of the library.
   • Interfaces containing connectors and partial models.
   • Types containing type, enumeration and choice definitions.

The Annex60 library uses the following conventions in addition to the ones of the Modelica Standard Library:

1. The nomenclature used in the package Annex60.Utilities.Psychrometrics is as follows,
   • Uppercase X denotes mass fraction per total mass.
   • Lowercase x denotes mass fraction per mass of dry air.
   • The notation z_xy denotes that the function or block has output z and inputs x and y.
   • The symbol pW denotes water vapor pressure, TDewPoi denotes dew point temperature, TWetBul denotes wet bulb temperature, and TDryBul (or simply T) denotes dry bulb temperature.
2. Names of models, blocks and packages should start with an upper-case letter and be a noun or a noun with a combination of adjectives and nouns. Use camel-case notation to combine multiple words, such as HeatTransfer.
3. Parameter and variables names are usually a character, such as T for temperature and p for pressure, or a combination of the first three characters of a word, such as higPreSetPoi for high pressure set point.
4. Comments should be added to each class (package, model, function etc.). The first character should be upper case. For one-line comments of parameters, variables and classes, no period should be used at the end of the comment.
5. All variables that have a physical correspondence, including physical ratios, must have a unit. Use (derived) SI units. Non-SI units are to be kept at an absolute minimum, and they must be declared as protected.
6. To indicate that a class (i.e., a package, model, block etc.) has not been extensively tested or validated, its class name ends with the string Beta.

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Annex60.UsersGuide.Contact

Contact

Information

Contact

The development of the Annex60 library is done through the Annex 60 project of the Energy in Buildings and Communities Programme of the International Energy Agency.

Library point of contact
Michael Wetter
Lawrence Berkeley National Laboratory (LBNL)
One Cyclotron Road
Bldg. 90-3147
Berkeley, CA 94720
USA
email: [email protected]

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Annex60.UsersGuide.Acknowledgements

Acknowledgements

Information

Acknowledgements

The following grants supported the development of the Annex60 library:

• LBNL was supported for the development of this library by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Building Technologies of the U.S. Department of Energy, under contract No. DE-AC02-05CH11231.
• The authors acknowledge the financial support by the Agency for Innovation by Science and Technology in Flanders (IWT) and WTCB in the frame of the IWT-VIS Traject SMART GEOTHERM focusing on integration of thermal energy storage and thermal inertia in geothermal concepts for smart heating and cooling of (medium) large buildings. The authors also acknowledge the financial support by IWT for the PhD work of F. Jorissen (contract number 131012). The work of Bram van der Heijde is funded through the project "Towards a Sustainable Energy Supply in Cities" by the European Union, the European Regional Development Fund ERDF, Flanders Innovation & Entrepreneurship and the Province of Limburg.
• RWTH Aachen University was supported for the development of this library by the German Federal Ministry for Economic Affairs and Energy (BMWi), promotional reference no. 03ET1177A, 03ET1211B.
• UdK Berlin was supported for the development of this library by the German Federal Ministry for Economic Affairs and Energy (BMWi), promotional reference no. 03ET1177D, 03ESP409C.
• Aalborg University was supported for the development of this library by the Danish Energy Agency, under the Energy Technology Development and Demonstration Program (EUDP), journal no. 64013-0566.

The following people have directly contributed to the implementation of the Annex60 library (many others have contributed by other means than model implementation):

• Marcus Fuchs, RWTH Aachen University, Germany
• Filip Jorissen, KU Leuven, Belgium
• Moritz Lauster, RWTH Aachen University, Germany
• Alessandro Maccarini, Aalborg University, Denmark
• Philipp Mehrfeld, RWTH Aachen University, Germany
• Jens Moeckel, UdK Berlin, Germany
• Thierry S. Nouidui, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
• Christoph Nytsch-Geusen, UdK Berlin, Germany
• Damien Picard, KU Leuven, Belgium
• Matthis Thorade, UdK Berlin, Germany
• Carles Ribas Tugores, UdK Berlin, Germany
• Bram van der Heijde, KU Leuven, Belgium
• Michael Wetter, Lawrence Berkeley National Laboratory, Berkeley, CA, USA

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Annex60.UsersGuide.License

Modelica License 2

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The Modelica License 2

Preamble. The goal of this license is that Modelica related model libraries, software, images, documents, data files etc. can be used freely in the original or a modified form, in open source and in commercial environments (as long as the license conditions below are fulfilled, in particular sections 2c) and 2d). The Original Work is provided free of charge and the use is completely at your own risk. Developers of free Modelica packages are encouraged to utilize this license for their work.

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Licensed by The Regents of the University of California, through Lawrence Berkeley National Laboratory under the Modelica License 2

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At the top level of your Modelica package and at every important subpackage, add the following notices in the info layer of the package:

• Licensed by The Regents of the University of California, through Lawrence Berkeley National Laboratory under the Modelica License 2 Copyright (c) 2009-2017, The Regents of the University of California, through Lawrence Berkeley National Laboratory.
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Annex60.UsersGuide.Copyright

Copyright

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Copyright

Copyright (c) 2009-2017, The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from the U.S. Dept. of Energy). All rights reserved.

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