Calibration of a hybrid heat pump system and application of an energy manager in building performance simulations

Abstract

In order to receive reliable results from a coupled building performance and HVAC simulation, the usage of calibrated models is advantageous. In this case study, monitoring data from a hardware-in-the-loop experiment is the basis for the calibration of an energy conversion system consisting of an air source heat pump, a condensing gas boiler (CGB), a thermal energy storage as well as the system controller. Since technical systems normally need expert knowledge to be calibrated adequately, this paper presents clear overviews about input and target values as well as tunable parameters for each subsystem. With satisfying results in terms of RMSE, three scenarios including a one family house are simulated. These scenarios differ in usage of heat pump, CGB and photovoltaic cells. In the end, results reveal that a fictive system existing of only the CGB lead to the lowest operational costs. This is mostly due to actual COPs that are worse than by the system controller predicted ones.