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Control logic developed in building performance simulations for the operation of HVAC systems : options, applications, and opportunities in a digital twin framework / vorgelegt von Karl Walther. Wuppertal, 2023
Inhalt
List of Figures
List of Tables
Acronyms
Introduction
Background and motivation
Challenges and problems
Complexity of buildings and systems
Design and implementation of controls
Research gap
Objectives and research questions
Contribution and outline
Fundamentals and state of the art
Performance requirements on building level
Control logic and building automation systems
Development of controls in the design phase and design documentation
Building automation systems
Implementation of controls on building automation systems
Interoperability
Simulation of buildings, HVAC systems and controls
Simulation technology
Computational methods in simulation and real controllers
Features of control functions
Transfer of control logic from BPS environments to building controllers
Digital Twins
Concept
Model types
Connection between Digital Twin and Physical Twin
Building-related use cases
Relation to BIM
Architecture and Digital Twin Environment
Summary
Evaluation of demonstration buildings
Presentation of demonstration buildings
Factory building
Testbed Akadmiska Hus
Testbed KTH
Sources of information about controls
Design documentation
BPS models from design phase
Control code implemented on building controllers
Reverse engineering
Performance analysis of air handling units
Summary
Methodology
Overview
Control development and building energy modeling
Spatial and temporal scope
Scope of control development
Performance requirements
Modeling methodology, requirements and simplifications
Standardization and proprietary models and controls
Connection of bps tools and building controllers
Transfer of controls
Modelica CDL
IDA ICE, Beremiz and PLCopen XML
Comparison
Execution of controls in BPS environments in the loopto operate HVAC systems
Controls in dt during design and operation
Controls vs. building and plant models
Controls in Digital Twins
Summary
Validation
Methodology
Demonstration objects and systems
Demonstration design and implementation process
Building energy and control modeling
Simulation environment
Thermal zones
HVAC systems
Controls
Control approach
Workflow and Digital Twins in design and operation
Transferring control logic via functional diagrams
Transferring control logic via PLCopen XML
Control execution with IDA ICE and OPC UA
Simulated and measured performance
Air handling units and control
Thermal zones
Integrated assessment
Discussion
Control performance and performance gap
Effort for the control development
Building automation architecture and interoperability
Services and responsibilities
Implementation errors, debugging, and updates
Opportunities in a Digital Twin framework
Barriers
Conclusion and Outlook
Conclusion
Outlook
Bibliography
Additional figures
Implemented controls
Implementation 1
Implementation 2
Implementation 3