Energy-optimised Building

ZAE Bayern develops energy-saving concepts and forward-looking technologies for energy-efficient buildings (e. g. evacuated insulation systems, functional layers, room temperature control with PCM). These innovative technologies are characterised and optimised throughout the entire development process, from laboratory samples to the finished product, and are evaluated metrologically as part of demonstration projects in existing buildings or as new buildings (monitoring).

In these building concepts, the interaction of building geometry, efficient building envelope, supply technology, daylight utilisation and shading as well as other innovative components are considered and synergies are optimized in order to create highly comfortable buildings with low CO2 emissions.

ZAE Bayern has particular expertise in this field in the field of evacuated insulation systems and in the development and thermal characterisation of latent heat storage materials (PCM).

Multifunctional facade elements with adaptive components such as switchable thermal insulation (SWD) and building-integrated photovoltaics (BIPV) offer enormous potential for using solar energy as heat or electricity in buildings. Concepts for multifunctional facades are designed, developed and demonstrated by ZAE Bayern.

The activities of this main research topic are included in the national research funding priorities of the Federal Ministry of Economics and Technology (BMWi). "Energieoptimiertes Bauen (EnOB)" integrated.

Fields of Research

Energy-efficient Buildings

The aim of this research topic is the development of components, technologies and concepts for energy-optimized buildings, both in new and existing buildings. The aim is to adapt the thermal and optical properties for the respective application. In this way, materials with extremely low, extremely high or even switchable thermal conductivity can be developed.

In addition to materials, the development and testing of energy-efficient components, for example in the fields of heating, cooling, daylight or sun protection technology, is another research focus. Development is usually carried out in close cooperation with partners from industry.

In addition, ZAE Bayern can use building simulation to quickly and economically analyze various components, scenarios and control strategies in advance. To increase flexibility, standard software tools such as TRNSYS, ESP-r or Radiance are supplemented by programs or add-ons developed in-house.

The final component of the research activities is the demonstration on the real building. ZAE Bayern has extensive expertise in the development and use of tailor-made monitoring systems. The Energy Efficiency Center in Würzburg as a pilot building in which numerous innovations from ZAE Bavaria are tested under real conditions of use. This is achieved by monitoring more than 2000 data points, combined with a The developments will also be accompanied to an increasing extent by LC analyses.

Research Focuses
  • Innovative overall concepts for new construction and renovation
  • Modeling and simulation (thermal, photometric)
  • evacuated insulation (VIP) and glazing (VIG), phase change materials (PCM)
  • Passive Infrared Night Cooling (PINC)
  • Building-integrated photovoltaics
  • Building Automation and Energy Management, Preemptive Control
  • Daylight and artificial light management
  • Natural and mechanical ventilation
  • Building integration of solar active systems and storage
  • multi-functional building components with switchable thermal insulation (SWD)
  • Monitoring & Demonstration
  • LC analysis of components and buildings

Dipl.-Phys. Stephan Weismann
+49 931 70564-338

Dr. Bastian Büttner
+49 931 70564-338


Operation optimization, monitoring and development of interdisciplinary control concepts at the Energy Efficiency Center (MoniResearch)

Photo monitoring

In 2014, the project "Operation optimization, monitoring and development of interdisciplinary control concepts at the Energy Efficiency Center" (MoniResearch) was launched. The short-term goal of this project is to start intensive monitoring in close coordination with the EnOB accompanying research team. The medium-term goals are to carry out long-term monitoring and the development of control and regulation strategies for an energetic and economical optimal operation. The long-term goal is to complete and evaluate the monitoring phase, continue monitoring and optimise knowledge transfer.

ZAE Bayern is establishing an integral monitoring system that goes far beyond the goals of the MoniResearch R&D project:
In addition to the approx. 1500 data points of monitoring by building automation, additional measurement data on temperatures (room air, ceiling, wall), heat currents, heat/cooling quantities and illuminance levels are continuously and automatically recorded in nine monitoring rooms equipped with special additional measurement technology. A representative part of the monitoring data is displayed here online.

Another unique feature of the EEC is the automated, regular user survey via pop-up windows on the PCs: Here, the user comfort is recorded in a time-resolved way, which enables the analysis of causes between comfort and discomfort.

In addition, the EEC façade is regularly checked for thermal insulation properties. In-situ measurement methods developed by ZAE Bayern are used here, for example.

Energy-Efficiency-Center | Monitoring


Dipl.-Phys. Stephan Weismann
+49 931 70564-338

Energy Efficiency Center

Photo energy-efficiency-center

The research and experimental building contains offices, laboratory and technical facilities as well as the corresponding infrastructure for research activities of ZAE Bayern in Würzburg. Furthermore, a seminar or conference room and an Info Center are integrated, which clearly illustrates current research and development results from the funding programme of the BMWi "Research for energy-optimised construction (EnOB)".

The project objective of the research building is a demonstration building used by experts and other groups of people with as many complementary innovations as possible, which are developed, demonstrated and evaluated locally by ZAE Bayern.

Through this unique synthesis of development, testing, demonstration and presentation as well as accompanying training and further education concepts, application-oriented energy research would generate a lasting resonance in the public eye.

New construction of the Würzburg Environmental Station: Innovative ice storage technology, LC analysis and monitoring

Photo ZAE Bayern environmental station

The in-house operation of the City of Würzburg – DIE STADTREINIGER - is currently building the new environmental station of the City of Würzburg. In a project sponsored by the Deutsche Bundesstiftung Umwelt the following innovations are being made:

The building is heated and cooled by an innovative ice storage system. A heat pump is used to heat the building, which uses a water/ice storage tank as a cold sink. If the climate is milder, the ice storage tank is heated with environmental heat, thawed again or used the cold to cool the building. This still new technology is monitored and optimised in operation by a monitoring system tailor-made by ZAE Bayern. Partial aspects of the Monitoring sessions will later be used as live visualizations in the environmental station to illustrate this technology.

In addition, concrete is being recycled for the first time in Bavaria at the environmental station. Instead of being stored on building rubble dumps, the demolition material from demolished buildings is reused here. The project is supported by the Brandenburgische Technische Universität Cottbus-Senftenberg. During the ongoing construction process of the environmental station, ZAE Bayern will support the environmental station by carrying out a Life Cycle Assessment (LCA) in order to determine in detail to show how much equivalent CO2 is emitted or saved in the construction, operation and dismantling phases.

DBU-Project: AZ 33520/02


Dipl.-Ing (FH) M.-Eng. Ronny Kastner
+49 931 70564-313

ZAE Bayern

We work at the interface between knowledge-based basic research and applied industrial research. Under the motto "Excellent Energy Research - Excellent Implementation", we realize complete innovation packages that build on synergies between generation, storage and efficiency measures.

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