Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Influence of internal control simplifications in heat pump system modelling for energy flexibility evaluations

Maarten Evens 1,2, Alessia Arteconi 1,2,3
1 KU Leuven, Belgium
2 EnergyVille, Belgium
3 Università Politecnica delle Marche, Italy

Abstract: Heat pump internal control strategies are frequently neglected, while the impact remains uncertain. This paper studies the short- and long-term effects of those strategies via simulation of a water-to-water heat pump. Neglecting these strategies caused non-negligible effects and profile modification. The electrical heat pump power was compared between simplified models and more detailed models that are able to accurately represent the internal strategies. It was shown that for 42 - 86 % of the year, the electrical heat pump power of the simplified models was within +/- 10 % of the most detailed model. As a second part, a flexible control with a spot tariff was applied to the heat pump. Compared to a classical approach to heat pump modelling with only minimum modulation, results again proved the importance of modelling heat pump internal control strategies.
Keywords: Heat pump, Flexibility, Control, Hardware-in-the-loop, Modelica
Pages: 1212 - 1219