Sensitivity analysis of feedback control for concrete core activation and impact on installed thermal production power

摘要

Because concrete core activation (CCA) actively integrates building mass in the heating, ventilation and airconditioning system, the choice of control strategy and controller settings plays a decisive role in reaching both thermal comfort and low energy use. Although not capable of intrinsically taking into account the system dynamics, conventional feedback control is often applied in CCA buildings. Without prior knowledge, a sensitivity analysis of the main control parameters highlights the basic characteristics a CCA feedback controller should have, taking energy use and thermal comfort as performance indicators. The best result is achieved by controlling the CCA surface temperature as a function of the ambient temperature, while transients are avoided to ensure an adequate performance with a low installed production power. Further data-analysis reveals the intrinsic controller behaviour of keeping the CCA core temperature during the whole year around 1 degrees C higher than the lower thermal comfort temperature.