Occupant comfort in Nearly Zero Energy Buildings (nZEB) by using the building structure for demand side management (DMS)

Ferdinand Sigg,Harald Krause,J Kurnitski,T Kalamees

doi:10.1051/e3sconf/202017206011

Ferdinand Sigg, Harald Krause + Show 2 more

Open Access

https://doi.org/10.1051/e3sconf/202017206011

Copy DOI

Abstract

This research project aims to increase the application range of Thermally Activated Building Systems (TABS). Usually TABS are used for heating and cooling purpose of buildings. The application range of the usage as energy storage element is limited by the surface temperature of the element to avoid overheating. Via a thermal decoupling of the thermal activated part with insulation from the building structure, it is possible to use TABS as an thermal energy storage. The results show a significant opportunity to time-shift the purchase of energy. The results show that it is possible to use TABS as a thermal energy storage element. It’s shown that the purchase of electrician energy for heating purpose can be shifted to economical or ecological optimal time points, for example if renewable energy is abundant in the electrical grid. The heating demand, covered by thermally charged TABS elements can be supplied by a fraction of 95%. Common TABS with a limited surface temperature can reach a coverage rate of 64 %. Nevertheless, the mean air temperature increases for this task by 1.1 K and the heat demand by 15.0 %.

Highlights

Through the increasing amount of renewable energy power plants the supply of renewable energy is very fluctuating
Various heating systems are available for the heating and cooling of buildings
Fast-reacting systems like air-based solutions, radiators or slower heating systems like underfloor heating systems are used for this purpose

Summary

Introduction

Through the increasing amount of renewable energy power plants the supply of renewable energy is very fluctuating. Activated Building Systems (TABS) are used in buildings for heating and cooling. A component, usually concrete, is heated or cooled slightly The advantage of this temperature conditioning is the use of the enormous storage mass and a large surface, and resulting in a very an slow component behaviour. When the concrete layer is heated by the pipes, the entire component heats up and releases thermal energy into the room via increased surface temperatures. This heat is usually released via radiation and convection, due to the temperature difference between the room zone and the surface temperature of the building component. Increased heat flow into the room causes the component temperature to decrease and the room temperature to rise

Objectives

Methods

Results

Conclusion