Bachelor's thesis Thomas Schramm


Simulation of complex building energy systems to determine extended boundary conditions for hardware-in-the-loop-experiments

Bachelor's thesis Schramm Copyright: EBC Air-to-water heat pump with a combined thermal energy storage and a photovoltaic system

The Institute for Energy Efficient Buildings and Indoor Climate conducts hardware-in-the-loop tests for heat pumps. Hereby, the hardware is coupled to a real-time building performance simulation and necessary information between test bench and simulation are exchanged.

For the hardware-in-the-loop test bench, the k-medoids-clustering determines four test days of a reference year as the test days that are then experimentally investigated in real-time. The determination of the test days needs weighting factors of the variable system inputs that are results of a sensitivity analysis.

The differential sensitivity analysis (DSA) is used for two building energy systems (1. electrically driven heat pump and solar thermal system; 2. electrically driven heat pump and photovoltaic system), to examine external boundary conditions. There is an analysis of their effect on the seasonal performance factor of the heat pump. On the basis of the DSA the weighting factors are calculated.