| Object | Centre for Tumour and Immunobiology (ZTI) of the University of Marburg |
| Client | Land of Hesse represented by the Hessian Ministry of Science and Art and the Hessian Ministry of Finance, Wiesbaden |
| Planner/Architect | Ludes Generalplaner GmbH, Berlin |
| Specialist heating contractor | Steingräber Montageservice, Mornshausen |
| Facts and figures | 3200 m² Roth Isocore concrete core temperature control with Roth Duopex S5 System Pipe, 20 mm |
| Year of installation of Roth products | Building started in 2011, completed in 2014 |
| Roth technical advisor | Roth technical advisor Rüdiger Stock |
Based on the objective of creating workspaces with the highest level of well-being, the ZTI developed a holistic, cross-trade planning for an energy-efficient building concept.
According to the plans of the Ludes Generalplaner office from Berlin, the Steingräber company from Mornshausen installed around 3200 square metres of Roth Isocore concrete core temperature control with the Roth Duopex S5 system pipe, 20 millimetres. The hydraulic connection was made using a Tichelmann pipe laid in the concrete with the Roth pipe installation system in dimensions of 25 to 40 millimetres. The Roth Alu-Laserplus System Pipe and Roth fittings were used. In the course of the concrete core temperature control installation work, the distribution line was laid in the middle of the ceiling.
The system idea
The Roth Isocore concrete core temperature control system uses the solid components of the building structure, such as concrete ceilings and walls, as thermal storage units for year-round building temperature control in heating and cooling. For this purpose, the water-carrying pipe system is integrated directly into the concrete components during the shell construction phase. Depending on the specific requirements of the building and the desired use and mode of operation, various Roth system solutions allow the pipe registers to be positioned in the thermally activated building component as needed. New office and administration buildings with large building storage masses, such as the ZTI in Marburg, are particularly suitable for the system solution. Low system temperatures during heating and relatively high cooling water temperatures in summer operation allow the integration of regenerative energy generators such as solar and heat pump systems and thus an energy-efficient and cost-effective mode of operation.
Maximum comfort in the ZTI
For optimal regulation and maximum well-being for the users, the university building is divided into several zones. Each zone was connected with a distribution system and led to the corresponding shaft. A great advantage of this type of installation is that no heating circuit distributors are required. This means that there is no need for niches and inspection flaps in the building project and there is more architectural design freedom for the use of the space.
Conclusion of the user
Gunnar Kuhl, the university's construction project manager, explained: "The office areas are supplied with cold or heat depending on the season and the outside temperature. A district heating connection and a compression chiller are available for supply."
Basic load coverage is the basis of the control concept for heating, he says. The static radiators in the offices are equipped with thermostatic valves, Gunnar Kuhl continues. His conclusion after almost two years of use is very positive: "The offices are pleasantly tempered all year round, which leads to an increased feel-good climate."
Comprehensive planning and consulting service
The Roth range includes coordinated system solutions for construction processes with in-situ concrete as well as specially designed solutions for industrially prefabricated concrete components. The Buchenau-based manufacturer also offers fast-reacting system solutions with pipe arrangements close to the surface.
Roth facilitates a comprehensive planning and consulting service with specially adapted and standard-compliant software planning tools. In addition, Roth provides construction site briefings, object-specific acceptance tests and tested, standard-compliant system performance data. Variable installation techniques can be used to implement individual system solutions tailored to project requirements. Various concepts for hydraulic integration into the building's overall system technology are possible. The manufacturer has many years of practical experience in the planning and supervision of large-scale projects with building temperature control.
Innovative: Roth System Pipes
Roth System Pipes with proven S5 CoEx technology are used for concrete core temperature control. Thanks to the five-fold coextrusion in one production run, the sandwich material of the Roth DUOPEX S5 System Pipes ensures optimum adhesion between the pipe layers. The pipes offer maximum resistance due to their mechanical, thermal and chemical properties and thus take into account the harsh construction site requirements of large-scale projects. The EVOH oxygen barrier layer is protected against external influences such as heat and moisture by a polymer and a polyethylene layer. The pipe has the highest resistance to deformation due to punctual mechanical stress. By preventing oxygen exchange, it is particularly durable. Roth System Pipes thus ensure optimum functional reliability in continuous operation. Together with Roth control technology, the user receives an economical surface heating and cooling system that ensures the best possible use of energy.
