Place: Seminar Room KC 3N27 and Zoom https://lu-se.zoom.us/j/64046568866?pwd=MVQ2VTBsWGo1TkhSREh1TjVsTzdJQT09
Contact: felix [dot] agner [at] control [dot] lth [dot] se
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Emil Sundström and Henrik Lindström are defending their Master's thesis at the Dept. of Automatic Control.
Where: Seminar room KC 3N27 and Zoom https://lu-se.zoom.us/j/64046568866?pwd=MVQ2VTBsWGo1TkhSREh1TjVsTzdJQT09
When: 30th of May, 16:15-17:15
Authors: Emil Sundström, Henrik Lindström
Title: Physics-enhanced machine learning for energy systems
Advisors: Pauline Kergus, Felix Agner, and Anders Rantzer
Examiner: Bo Bernhardsson
Building operations account for a huge amount of energy usage and the HVAC (Heating, Ventilation and Air Conditioning) systems are the largest consumer of energy in this sector. A way to reduce this demand is to implement more effective control algorithms and a popular way to do this is by using model based control strategies. However, this demands a precise model. Modelling heat in buildings is a difficult task since a lot of disturbances occur in the process. Computers running, lots of people in a room and an open window are all examples of disturbances that exists and have to been taken into account.
This thesis aims to use recent data-driven methods to find suitable procedures to model heat in buildings. This was done in two steps. First, a gray box model was created and its parameters fitted using different data-driven methods. Then, more complex learning-based models were tried out and added to the gray box part to catch some of the disturbances. Feed-forward neural networks, LSTM networks and box jenkins models were the methods used for this disturbance modelling part.
The results showed that a gray box model can capture most of the dynamics of the heat dynamics in the building, but that the obtained parameters and the performance depended a lot of the method used for parameter estimation. Adding a more complex disturbance part to the gray box model improved the results by far and were able to catch some of the disturbances.