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Simulation Based Assessment of Heat Pumping Potential in Non-Residential Buildings – Part 1: Modeling
Bertagnolio, Stéphane; Stabat, Pascal; Soccal, Benjamin et al.
2010In Proceedings of the 10th REHVA World Congress - Clima 2010
Peer reviewed
 

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Abstract :
[en] 1 Introduction A solution to reduce the energy consumption in office and health care buildings consist in better exploiting the potential of the heat pump technology. This can be done by recovering heat at the condenser when the chiller is used to produce cold (simultaneous heating and cooling demands) or by using the chiller in heat pump mode (non-simultaneous heating and cooling demands). Both strategies appear particularly feasible when cooling and heating needs and the heat pump technology are, at least partly, present in the building, which is often the case in the tertiary sector. The analysis of these reversibility and recovery potentials is one of the subjects of the IEA-ECBCS Annex 48 project. 2 Simulation tools A package of simulation tools is developed in order to assess the energy and environmental performances and costs of such solutions. A first tool allows a quick estimation of the potential of recovery and reversibility options, starting with limited information and using a limited amount of parameters. It consists in simulating the considered building and its secondary HVAC system in order to generate hourly values of heating and cooling system loads and to compute theoretical reversibility and recovery potentials. This first simulation run can be performed by mean of a calibrated building energy simulation tool (Trnsys, Energyplus…). Hourly values of heating and cooling loads of a given building can also be obtained through in-situ measurements. A second tool allows to simulate the behavior of the heat pump plant and to compute its performances using the previously computed heating and cooling load profiles as inputs. The considered heat pump configuration is then compared to a classical HVAC primary system (composed of a boiler and a chiller) in terms of primary energy consumption, CO2 emissions and costs. In this first paper, the development of such models and their implementation in an equation-based solver are described. The considered heat pump configurations are presented and the models of the main components (heat pump, boiler, thermal storage system, cooling tower and ground heat exchanger) are described. Five general configurations are considered: (1) reversible air-to-water heat pump, (2) exhaust air heat pump, (3) dual condenser heat pump, (4) water loop systems and (5) ground coupled heat pump. The modeling hypotheses, the control algorithms and the connection of these models into global heat pump systems simulation models are discussed. Finally, it is shown how simple equation-based simulation models can be connected to allow quick and robust assessment of the potential of complex heat pump systems.
Disciplines :
Energy
Author, co-author :
Bertagnolio, Stéphane ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Thermodynamique appliquée
Stabat, Pascal
Soccal, Benjamin
Gendebien, Samuel ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Turbomachines et propulsion aérospatiale
Andre, Philippe ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Département des sciences et gestion de l'environnement
Language :
English
Title :
Simulation Based Assessment of Heat Pumping Potential in Non-Residential Buildings – Part 1: Modeling
Publication date :
May 2010
Event name :
10th REHVA World Congress - Clima 2010
Event organizer :
REHVA
Event place :
Antalya, Turkey
Event date :
du 9 mai au 13 mai 2010
Audience :
International
Main work title :
Proceedings of the 10th REHVA World Congress - Clima 2010
Peer reviewed :
Peer reviewed
Name of the research project :
IEA-ECBCS Annex 48
Funders :
Région wallonne [BE]
Available on ORBi :
since 17 March 2010

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