Master's thesis Anne Albert

 

Development of a floor-integrated HVAC-System for zonal supply of multifunctional buildings

Summary of feasible supply scenarios Copyright: EBC Summary of feasible supply scenarios

Nowadays, the prevailing building structure is characterised by mono-functional objectives. Planning periods and utilization scopes are getting shorter and future applications are harder to predict because of quickly changing demographic, social and economic conditions.

Due to this, a decentralised and multifunctional building concept is developed. It offers adaptability to dynamic changing requirements of today’s users and allows changes of use without significant modifications of the building structure. An innovative wide-span floor system enables an easy reconfiguration of defined building zones as well as the implementation of a modular floor-integrated heating-, ventilation- and air-conditioning-concept. Based on an exemplary reference building, heating and cooling demands as well as ventilation requirements are determined exemplarily for different room types for residential and office buildings. To cover these requirements, feasible supply strategies are presented and analysed on the basis of technical, structural-physical and use-related factors with respect to their applicability in this concept. The challenge is to adjust the power level of technology to the special demand situation, to integrate the equipment in confined spaces and to minimise the constraints of users.

Finally, scenarios based on the technically feasible technologies are developed and evaluated. In particular, a heat pump with heating and cooling ability combined with concrete core activation and underfloor ventilation system represents a promising supply to meet the demand of different usage scenarios. This system offers the advantage that complex gas installations are not needed.

However, the high degree of flexibility concerning individual changes of use, which is enabled by the wide-span floor system, cannot be fully reached by regard to the building’s supply. Through a standardised modular design a flexible exchange of the systems is guaranteed, but the selection of supply techniques is limited due to concept-specific conditions.