THE CHALLENGES

Provide a robust HVAC building automation solution

Establish a state-of-the-art and comprehensive energy management system for optimal energy consumption

Reduce the loss of heat

Innovative Class Room Ventilation with L-IOB I/O Controllers

The energy concept did not only aim at savings but also at a good indoor climate. Controlled ventilation of each class room plays a decisive role at it. Decentralized Trox ventilation devices with integrated heat recovery (Schoolair-V) provide the necessary fresh air in the rooms. Automation of the ventilation devices is managed with integrated, freely programmable L-IOB I/O Controllers by LOYTEC communicating on the LonMark TP/FT-10 channel. Perfectly adapted to the specific requirements of the project, the L-IOB I/O Controllers inside of the almost 120 Schoolair-V ventilation devices provide a comfortable climate in Wendelstein high school.

L-INX Automation Servers Take on Tasks in Building Automation

For automation of the sun blinds, control of the concrete core cooling, demand-based lighting control of the big entrance hall, corridors and the exterior, freely programmable L-INX Automation Servers are deployed. Here the extremely short program cycle times (down to 10 ms) are advantageous with the resulting quick response time for switching the light and synchronic operation of the sun blinds. Simultaneously the L-INX Automation Servers act as gateways for the Modbus integration of energy meters into the CEA-709 network.

Constant Light Control with L-DALI

Up to 2,000 DALI lamps are connected to L-DALI Lighting Controllers. The controllers manage constant light control in the class rooms and are able to regulate the two lighting zones (one at the window side, one at the corridor side) independently from each other. DALI multi sensors by Osram are incorporated into constant light control. The integrated gateway function of the L-DALI Lighting Controllers sends data from the multi sensors to be displayed as network variables. This way data is available for the entire building automation system. This important data is utilized in various overlapping building applications.

Operation and Monitoring with L-VIS Touch Panels

L-VIS Touch Panels are used in the sports gymnasiums by both pupils and teachers for lighting control, and for stationing of the basketball hoops, still rings and the separating curtain walls. The school building engineer uses L-VIS for regulation of the lamps in the big entrance hall and in the corridors as well as for monitoring all windows and door positions in the building.

Data Monitoring for Optimization of Energy Consumption

The facility management of the school’s owner, the county of Roth, is responsible for continuous acquisition and evaluation of system and consumption data. This helps in analyzing the high schools’ energy fluctuations and monitoring the systems. The aim is to optimize energy consumption permanently and to quickly detect error sources in case of deviations. Consumption data is provided by electricity meters, heat meters and water meters. Meters using CEA-709, Modbus/RTU interface and pulse counters are used. L-IOB I/O Controllers provide data from the Schoolair devices, distributed L-DALI Lighting Controllers provide consumption data from the DALI lighting system, and L-INX Automation Servers gather energy data of the solar systems via Modbus TCP.

LonMark System

All network nodes on LonMark TP/FT-10 channels are connected via L-IP Routers to the IP network (LonMark IP-852). Due to this network system the operator can access the building automation system and respectively the installed network nodes, local or remote at any time. 
Within the LonMark System the installed L-INX Automation Servers, L-GATE Gateways and L-DALI Lighting Controllers integrate other devices utilizing communication protocols like BACnet, Modbus and DALI and so provide seamless exchange of data between the different systems.

During a construction period of two years only the county of Roth erected the three floor concrete steel construction of high school Wendelstein with a gross floor area of 12,500 m² (134,548 ft²) for up to 800 students. It is considered the most modern high school in Bavaria and already has won several awards.

The energy concept at Wendelstein High School offers numerous benefits, significantly reducing energy consumption through the use of renewable energies such as geothermal heat and solar energy. The school's construction, combined with advanced building physics and intelligent HVAC automation, results in a thermal energy need of only 40 kWh/m² (3.7 kWh/ft²), aligning it with low-energy house standards and nearing passive house consumption levels. This efficient energy use is complemented by innovative systems integration, utilizing standardized communication protocols like LonMark System (CEA-709) to ensure economic implementation. The integration includes approximately 1,000 nodes and various hardware components via DALI, Modbus, and BACnet, ensuring a secure and energy-efficient operation. The L-IOB I/O Controllers, L-INX Automation Servers, L-DALI Lighting Controllers, and L-VIS Touch Panels work together to optimize indoor climate, lighting control, and energy consumption, enhancing comfort and operational efficiency for students and staff.

In conclusion, the Wendelstein High School project exemplifies a pioneering approach to energy efficiency and sustainable building design. Its comprehensive energy concept, reliant on renewable sources and intelligent automation, not only minimizes energy consumption but also creates a conducive indoor environment for learning. The integration of various systems through standardized communication protocols ensures reliable and efficient building operations. LOYTEC developed this advanced solution to demonstrate how cutting-edge technology can significantly enhance energy efficiency and operational performance in modern buildings. This innovative approach has positioned Wendelstein High School as a model of modern, sustainable architecture, garnering several awards and setting a new standard for educational facilities. The commitment to continuous data monitoring and optimization underscores the long-term sustainability and operational excellence of this cutting-edge institution.