SEMINAR: Advanced Building and HVAC Simulation with Matlab/Simulink
Experience shows that for multi-family houses, a complete renovation including conversion to central heating and DHW systems is hardly possible. Measures inside the inhibited flats are often associated with a number of complications (technical, legal, financial). Thus the centralization of ventilation, heating and domestic hot water (DHW) is often dropped. Unfortunately, energy and cost efficient decentralized (and less disruptive) solutions are also not available. Therefore, new innovative concepts for heating and ventilation need to be developed and investigated: In the framework of the Austrian project SaLüH! (FFG) very compact heat pumps are developed in such a way that it will be possible to integrate these units into the window parapet or into a prefabricated timber façade. The wall integration has a high potential in prefabrication and minimum space use and thus leads to an optimal solution for small apartments. In order to provide sufficient heating power with the heating and ventilation heat pump (MVHR with exhaust-supply-air HP), secondary air is recirculated. This gives, in addition, more flexibility with respect to individual room temperature control. Appropriate control strategies are required and need to be tested.
Numerical models for MVHR and heat pump are developed in Matlab and Matlab/Simulink using CoolProp. The models are calibrated against experimental data from lab tests as well as from a monitoring of a demo building in Ludwigsburg, Germany. With dynamic building and system simulation different heating concepts are compared and different control strategies are tested. A multi-zone building model in Matlab/Simulink with hygro-thermal walls and air-coupling was developed and is used for the control optimization considering thermal comfort and indoor air quality.
The developed models, experimental results of the compact heat pump as well as building simulation results will be presented.
Senior Researcher at University of Innsbruck, Unit for Energy Efficient Buildings, University of Innsbruck, Austria
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Fabian Ochs is Senior Researcher at the University of Innsbruck, Unit for Energy Efficient Buildings and owns the lectureship Engineering Thermodynamics and Heat and Mass Transfer at FU Bolzano / Uni Trento. His expertise covers energy efficient buildings, HVAC systems and renewable energy with a focus on thermal building and HVAC system simulation and numerical methods. He has experience in building physics, with a focus on hygro-thermal measurement, modelling, and simulation as well as in large-scale thermal energy storage.