Recent Developments of the Modelica "Buildings" Library for Building Energy and Control Systems

Wetter, Michael; Zuo, Wangda; Nouidui, Thierry Stephane

doi:10.3384/ecp11063266

Cited by 39 publications

(27 citation statements)

References 10 publications

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“…Some Libraries like Modelica "Buildings" or "Human Comfort" contain models for building energy and combined control system simulations [8]. Yet, with these libraries, it is still a huge effort to model a complete building-vehicle-user energy system.…”

Section: Simulation Toolsmentioning

confidence: 99%

"Green Building" - Modelling renewable building energy systems and electric mobility concepts using Modelica

Unger¹,

Schwan

Mikoleit³

et al. 2012

Linköping Electronic Conference Proceedings

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For most people, a comfortable living and mobility are basic needs. With the rising individual demand for energy as well as the diminishing fossil energy resources, new optimized concepts for energy supply and usage are required. To address these challenges, renewable energy sources, decentralized storage, and electric mobility concepts are matters of rapidly growing importance.Future building energy systems have to successfully integrate user demands, local renewable energy, storage systems and charging infrastructure, a task requiring extensive scrutinizing.Typical questions to the engineer are to compare different system layouts with respect to sustainability, cost, and robustness, or to identify the right levers in an energy system to optimize components and control algorithms. This paper describes an approach to solve such questions using simulations with the non-causal language Modelica. Modeling paradigms and examples are shown. Special emphasize is given to the "Green Building" library and its components, bringing major building energy systems and electric vehicles to the same platform.

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Section: Simulation Toolsmentioning

confidence: 99%

"Green Building" - Modelling renewable building energy systems and electric mobility concepts using Modelica

Unger¹,

Schwan

Mikoleit³

et al. 2012

Linköping Electronic Conference Proceedings

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“…Recently, Modelica has become more and more used in building performance simulation. The Lawrence Berkeley National Laboratory developed a Modelica library called Buildings, that contains a large number of HVAC components and a multi-zone building model (Wetter, Zuo, and Nouidui 2011). Also, the RWTH Aachen and UdK Berlin (NytschGeusen and Unger 2009) are developing Modelica libraries for HVAC-systems and building models.…”

Section: Simulation Toolmentioning

confidence: 99%

“…Wind pressure and buoyancy from the air-specific volume difference and ventilation are not modelled in order to avoid too high level of complexity and computational time. Finally, the radiant slab (25 m 2 ) from the buildings library (Wetter et al 2013) is connected to the only room where it exchanges heat in the house (zone 1).…”

Section: Building Modelmentioning

confidence: 99%

Performance of a reversible heat pump/organic Rankine cycle unit coupled with a passive house to get a positive energy building

Dumont

Carmo

Fontaine

et al. 2016

Journal of Building Performance Simulation

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This paper presents an innovative technology that can be used to deliver more renewable electricity production than the total electrical consumption of a building while covering the heat demand on a yearly basis. The technology concept uses a heat pump (HP), slightly modified to revert its cycle and generate electricity, coupled to a solar thermal collector roof. This reversible HP/organic Rankine cycle unit presents three operating modes: direct heating, HP and organic Rankine cycle. This work focuses on describing the dynamic model of the multi-component system followed by a techno-economic analysis of the system under different operational conditions. Sensitivity studies include: building envelope, climate, appliances, lighting and heat demand profiles. It is concluded that the HP/ORC unit can turn a single-family house into a PEB under certain weather conditions (electrical production of 3012 kWh/year and total electrical consumption of 2318 kWh/year) with a 138.8 m 2 solar roof in Denmark.

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“…whole building simulation) in that it allows users to model in detail and control any device affecting the building's consumption. The "Buildings A B C D C library v1.3" was used, that is a library made of components specifically tailored for building simulation [9]. Modelica TM is an object-oriented, equation based language to conveniently model complex physical systems containing, e.g., hydraulic, thermal, control and electric power.…”

Section: The Simulation Modelmentioning

confidence: 99%

A Lumped Parameter Model for Dynamic Simulation of Energy Control Policies Applied to Small Public Buildings

Pontoni¹,

Giuliani²,

Carbonari³

et al. 2015

Proceedings of the International Symposium on Automation and Robotics in Construction (IAARC)

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As public buildings are responsible for considerable amounts of fuel consumption, public administrations are encouraged to adopt interventions for energy requalification of their real estates. In particular, low-cost energy requalification with high return on investments is a good opportunity when resource shortage hampers the adoption of expensive refurbishment. However, in order to properly plan such a process, a detailed energy audit must be carried out. In addition, a reliable model of the audited building is needed to breakdown the whole energy consumption and to simulate prospective energy savings from candidate requalification strategies. To that purpose, this paper will describe a new-generation Dymola TM based simulation approach, that is reliable enough for assessing the dynamic behaviour of public buildings, even when non-standard systems and heat transfer phenomena are involved.This model provides users with two main advantages: on one hand it facilitates the simulation of interacting physical phenomena (e.g. fluiddynamics, thermal exchange etc…), on the other hand it allows to simulate even advanced control of existing HVAC systems. This last feature is not typical of standard energy simulation software programs. In addition, it is needed when we deal with low-cost energy requalification, because it is usually aimed at the enhancement of existing regulation devices, so that their behaviour must be simulated in order to find out the best customized control policy. Finally, the paper will assess energy savings which can be obtained through the improvement of the HVAC system's control policy for a case study relative to a small public building, that is used as a community clinic.

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Recent Developments of the Modelica "Buildings" Library for Building Energy and Control Systems

Cited by 39 publications

References 10 publications

"Green Building" - Modelling renewable building energy systems and electric mobility concepts using Modelica

"Green Building" - Modelling renewable building energy systems and electric mobility concepts using Modelica

Performance of a reversible heat pump/organic Rankine cycle unit coupled with a passive house to get a positive energy building

A Lumped Parameter Model for Dynamic Simulation of Energy Control Policies Applied to Small Public Buildings

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