References of "Bertagnolio, Stéphane"
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See detailDynamic Thermal Modeling of a Radiant Panel System and its Environment for Commissioning: Application to a Case Study
Fonseca Diaz, Nestor; Bertagnolio, Stéphane ULg

in Proceedings of the 9th International Conference for Enhanced Building Operation, Austin, TX (2009, November)

As a part of a commissioning study, the cooling ceiling system of a large commercial building located in Belgium is evaluated. A representative office has been instrumented and data on the cooling ceiling ... [more ▼]

As a part of a commissioning study, the cooling ceiling system of a large commercial building located in Belgium is evaluated. A representative office has been instrumented and data on the cooling ceiling system operating in real conditions have been collected. The simulation of the whole system is performed by means of a dynamic thermal model of the building and its HVAC system. The model considers the radiant panels as a dynamic-state finned heat exchanger connected to a simplified lumped dynamic model of the building. The behavior of the radiant ceiling system and the interactions with his environment (walls, ventilated façade, internal loads and ventilation system) has been experimentally and numerically evaluated. Commissioning test results show that the influence of surfaces temperatures inside the room, especially the façade, is considerable. Then, it is clear that the radiant ceiling system must be evaluated together with its designed environment and not as separate HVAC equipment. [less ▲]

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See detailDevelopment and use of equation based simulation tools to support audit of commercial buildings
Bertagnolio, Stéphane ULg; Lebrun, Jean ULg; Andre, Philippe ULg

in Proceedings of the eleventh International IBPSA Conference, Glasgow, UK (2009, July)

A series of new simulation tools are being developed to help the building energy auditor in establishing his diagnosis (including benchmarking and detailed analysis of actual energy consumption) and in ... [more ▼]

A series of new simulation tools are being developed to help the building energy auditor in establishing his diagnosis (including benchmarking and detailed analysis of actual energy consumption) and in evaluating the selected Energy Conservation Opportunities (ECOs). The Building-HVAC System global models presented here include simplified models of building zones and of HVAC equipment. Only a limited number of easily identifiable parameters is required. The simplicity of the models and the use of an equation solver to run the simulation ensure good robustness and full transparency. The development, the implementation and the use of these models are discussed in the present paper. Focus is also given to the calibration of the tools to the monthly utility bills. [less ▲]

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See detailDeveloppement et utilisation de modèles de simulation pour l'audit et la rénovation des bâtiments conditionnés
Bertagnolio, Stéphane ULg; Lebrun, Jean ULg; Andre, Philippe ULg

(2009, May)

Une suite d’outils de simulation de bâtiment et de système de climatisation destinés à assister l’audit et la rénovation des bâtiments commerciaux est actuellement en développement. Les outils en question ... [more ▼]

Une suite d’outils de simulation de bâtiment et de système de climatisation destinés à assister l’audit et la rénovation des bâtiments commerciaux est actuellement en développement. Les outils en question sont développés de façon à limiter le nombre de paramètres demandés à l’utilisateur et à garder une transparence totale pour ce dernier. Dans un premier temps, le développement des modèles et leur implémentation dans un solveur d’équations sont discutés. L’identification des paramètres des modèles développés est ensuite discutée et illustrée par un exemple d’application. [less ▲]

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See detailSimulation-assisted audit of an air conditioned building
Bertagnolio, Stéphane ULg; Lebrun, Jean ULg; Hannay, Cleide ULg et al

in Proceedings of the 8th International Conference for Enhanced Building Operation, Berlin, Germany (2008, October)

The example presented here concerns the audit of a typical, medium-size, office building erected in Brussels at the end of the sixties. This building is equipped with a classical old fashioned air ... [more ▼]

The example presented here concerns the audit of a typical, medium-size, office building erected in Brussels at the end of the sixties. This building is equipped with a classical old fashioned air conditioning system with air handling units and four-pipes induction units. In the first part of the paper, a classical audit procedure is applied. It consists in a systematic analysis of all information available, with help of very simple calculation. In the second part of the paper, an equation-based building-HVAC simulation tool is used to assist the audit. Fuel and electricity consumption are then interpreted and significant energy saving opportunities are identified. [less ▲]

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See detailNew simulation tools usable in the energy audit of HVAC systems
Lebrun, Jean ULg; Bertagnolio, Stéphane ULg

Scientific conference (2008, October)

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See detailSimulation of a building and its HVAC system with an equation solver: Application to benchmarking
Bertagnolio, Stéphane ULg; Lebrun, Jean ULg

in Building Simulation: An International Journal (2008), 1(3), 234-250

The today - availability of powerful engineering equation solvers is opening very new possibilities in technical component modelling and in system simulation. The simulation models, the “user guide” and ... [more ▼]

The today - availability of powerful engineering equation solvers is opening very new possibilities in technical component modelling and in system simulation. The simulation models, the “user guide” and the “reference guide” are all included in a same file. Reliable “reference” and “simplified” models are currently available for the building zone and for most HVAC components. Focus is given here on “simplified” models and on a simulation tool, called “Benchmark”. This tool should help an auditor to make the best use of the limited information usually available about actual fuel and electricity consumptions and to get a very first evaluation of the actual performances of a given HVAC system. An example of such use is presented. Another simulation tools and more information about the modelling of HVAC components will be presented in a further paper. [less ▲]

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See detailHeat recovery and reversible heat pumping potentials in non-residential buildings
Bertagnolio, Stéphane ULg; Lebrun, Jean; Andre, Philippe ULg et al

Conference (2008, September)

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See detailBuilding and HVAC system simulation with the help of an engineering equation solver
Bertagnolio, Stéphane ULg; Masy, Gabrielle; Andre, Philippe ULg et al

in Proceedings of the 3rd National conference of the IBPSA-USA, Berkeley, CA (2008, July)

A simplified Building-HVAC system model is presented here. It includes simplified models of building zone and of HVAC equipment. The simplified building zone model is based on a R and C network, whose ... [more ▼]

A simplified Building-HVAC system model is presented here. It includes simplified models of building zone and of HVAC equipment. The simplified building zone model is based on a R and C network, whose parameters are adjusted trough a frequency characteristic analysis. The implementation of the classical phenomena taking place in building dynamics is discussed. The simplified building model is compared with more detailed models, using the BESTEST procedure. The application of the presented model to the audit of commercial buildings is also discussed. [less ▲]

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See detailDevelopment of a simplified Building-HVAC System model with the help of an equation solver
Bertagnolio, Stéphane ULg; Lemort, Vincent ULg; Lebrun, Jean ULg

Conference (2008, June 25)

This seminar shows how modeling and simulation environments that are built using equation-based solvers can benefit the building energy community. Such modeling and simulation environments separate the ... [more ▼]

This seminar shows how modeling and simulation environments that are built using equation-based solvers can benefit the building energy community. Such modeling and simulation environments separate the formulation of a model’s underlying physics from its numerical solution algorithms. This allows input-output free modeling, it leads to faster model development time and it facilitates model reuse for different applications. Equation-based modeling and simulation environments are frequently used in various industrial sectors. For building energy simulation, however, they have not yet enjoyed wide-spread use. This seminar encourages discussions to understand their applicability, advantages and limitations for the building energy community. [less ▲]

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See detailHeat Pumping and Reversible Air Conditioning: How to make the best use of HVAC equipment ?
Bertagnolio, Stéphane ULg; Lebrun, Jean ULg; Andre, Philippe ULg et al

in Proceedings of the 9th International IEA Heat Pump Conference, Zurich, Switzerland (2008, May)

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See detailHeat pumping and reversible air conditioning : how to make the best use of HVAC equipment ?
Bertagnolio, Stéphane ULg; Lebrun, Jean ULg; Andre, Philippe ULg et al

Conference (2008)

Substituting a heat pump to a boiler may save more than 50% of primary energy, if electricity is produced by a modern combined cycle power plant (and even more if a part of that electricity is produced ... [more ▼]

Substituting a heat pump to a boiler may save more than 50% of primary energy, if electricity is produced by a modern combined cycle power plant (and even more if a part of that electricity is produced using renewable sources). Two of the most attractive heat pumps applications consist in recovering the heat rejected by the condenser of an existing chiller and in using this chiller in reversible mode. This is the topic of the IEA-ECBCS Annex 48 project (“Heat pumping and reversible air conditioning”). An overview of the project is presented and the work of the different participants is briefly explained. Case studies are also briefly presented and more details are given on one of them. [less ▲]

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See detailDevelopment and application of test cases for comparing vertical ground heat exchangers models
Bernier, Michel; Kummert, Michael; Bertagnolio, Stéphane ULg

in Proceedings of the 10th International IBPSA Conference, Beijing, China (2007, September)

The main objective of this paper is to establish a set of test cases for analytical verifications and intermodel comparisons of ground heat exchanger (GHX) models used in building simulation programs ... [more ▼]

The main objective of this paper is to establish a set of test cases for analytical verifications and intermodel comparisons of ground heat exchanger (GHX) models used in building simulation programs. Several test cases are suggested. They range from steady-state heat rejection in a single borehole to varying hourly loads with large yearly thermal imbalance in multiple borehole configurations. The usefulness of the proposed test cases is illustrated by running them with different GHX models. This comparison exercise has shown that 1-D models compare favourably well with the more elaborate 3-D models for relatively small simulation periods. The cyclic heat rejection/collection test has revealed some small deficiency in the load aggregation scheme of a particular model. Finally, the use of the asymmetric (cooling dominated) load profile test case for a bore field composed of 100 boreholes revealed that the borehole wall temperature predicted by two GHX models can differ by as much as 10oC after a 30 year simulation. [less ▲]

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See detailHeat Pumping and Reversible Air Conditioning: Retrofit opportunities in a laboratory building
Aparecida Silva, Cleide; Bertagnolio, Stéphane ULg; Hannay, Jules et al

Conference (2007, September)

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See detailStudy, modeling and analysis of heat pumping solutions in a commercial building
Bertagnolio, Stéphane ULg

Master's dissertation (2007)

This work is carried out in the frame of the IEA-ECBCS (International Energy Agency – Energy Conservation in Buildings and Community Systems) Annex48: “Heat Pumping and Reversible Air Conditioning”. The ... [more ▼]

This work is carried out in the frame of the IEA-ECBCS (International Energy Agency – Energy Conservation in Buildings and Community Systems) Annex48: “Heat Pumping and Reversible Air Conditioning”. The aim of this work is to study the possibility of integration of a reversible heat pumping system into the existing HVAC system of a “commercial” building (which includes laboratories). A pre-audit of the actual HVAC installation is carried out and presented. Numerical models of the building and of the coupled HVAC installation are developed and implemented on EES (Engineering Equation Solver, ©F-Chart Software) to run yearly simulations. The main retrofit opportunity is the use of reversible heat pumping, with the extracted air as heat source, to heat the building. Other retrofit possibilities, as “change over” technique or cool thermal energy storage, are also modelled, simulated and analysed. The environmental and economical aspects of each retrofit opportunity are approached. The reversible heat pumping coupled with a change over technique is generally able to satisfy the heating demand of the building. However some interventions of the existing natural gas condensing boilers, as back boosting devices, are sometimes necessary during winter. The economical and environmental studies reveal a quite short payback time and a significant reduction of CO2 emissions. The advantages of the cool thermal storage solution are not obvious and have not been highlighted in the present case. [less ▲]

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See detailHeat Pumping and Reversible Air Conditioning - First Case Study Results
Aparecida Silva, Cleide; Bertagnolio, Stéphane ULg; Hannay, Jules et al

Conference (2007, April)

Detailed reference viewed: 70 (4 ULg)