Simulation model for minimal invasive refurbishment approaches through prefabricated multifunctional radiant heating façade elements

Abstract

This paper describes an approach for validating and calibrating a digital twin of a prefabricated multifunctional radiant heating façade element. In December 2017, a prototype equipped with sensors able to log surface and layer temperature (on the inside and outside surface and within the construction layers), relative humidity as well as vertical global irradiation was mounted to the existing brickwork wall. The measurement interval was set to one minute. Two different control strategies for a minimal invasive radiant heating systems are compared in regard to energy efficiency and the deviation of the room temperature from a defined set point by thermal simulation. The validation is executed through alignments of simulation results and measured data by implementing measured boundary conditions. Results concerning the minimal inlet flow temperature, the control strategy and the thermal behavior can be multiplied and utilized for the refurbishment process of the whole building.