Commerzbank Arena [Frankfurt-Am-Main, Germany]

Building Description
The Commerzbank Arena in Frankfurt Am Main, Germany (Co – Ordinates 50° 4' 6.86" N, 8° 38' 43.65" E) is a large sports arena owned by City of Frankfurt Am Main through the holding company Commerzbank Arena (Sportpark).

The area has a typically central European climate. It consists mainly of a reinforced concrete structure which was rebuilt in 2006 on the site of the previous stadium “Waldstadion”.

The facility is operated by a joint management team of HSG Zander (total facilities management) and Sportfive (event management). The Arena hosts approximately 300 events each year 30 of which are major events such as music concerts and soccer matches.

Daily Users. The main tenant of the arena is Eintracht Frankfurt who are a football team in the German Bundesliga (Premier Division). There are approx. 40 daily operations and maintenance staff.

Event Hosting

  • Visitor Capacity: ~ 50,000 seated (plus additional 6,000 standing for concerts)
  • 83 Hospitality Boxes ranging 6 – 22 guests each
  • 5700m2 Business Area over 4 levels used to host seminars, conferences, meetings & conventions (Approximately 100 events per year)
  • Catering Staff depending on event

Technical Details
The installed electrical, heating and cooling equipment is belowground to the  Northwest and Northeast of the stadium and is approximately 8 – 10 years old. There are two “media towers” in this area one of which carries the boiler and generator exhaust fumes the second houses fan driven cooling units for the chiller belowground.

The BMS is a Sauter system with a Nova Net bus. (BAC net proposed for CAMPUS 21)
The Arena utilises 2 x 1200KW gas boilers for heating, 2 chillers (875KW and 300KW) for cooling and electricity is provided by Mainova. In addition backup generators are used during large events to ensure continuity of services. These systems are owned by the city council and operated on their behalf by HSG Zander

The currently installed BMS system is not integrated with the facility operations nor does it support detailed information regarding energy consumption. It is only possible to track monthly gas and electricity consumption for the whole arena. This is a particular problem for this facility type as the energy demands can be highly variable and characteristically consist of high peaks over short durations.

Therefore, through the use of integrated ICT systems developed in campus 21 it will be possible to provide clarity and detail regarding the energy consumption behaviour of the sports arena as well as improved control of these systems.

Two use case scenarios are proposed for the Commerzbank Arena to develop the CAMPUS 21 objectives. So far in the project the installations for systems integration were planned and carried out and the resulting data has been analysed to develop the optimization models. The experimental phase will take place during the 2014-2015 heating season.

    1. Grass Heating Optimisation and Load Balancing


During the typical heating season, late October to early April the arena heating demand can exceed capacity of the gas boiler hydronic system when the ambient temperature is below 5°C for extended periods. This is due mainly to grass heating system which requires 50% of the peak output of the gas boilers (approximately 40% of annual gas consumption).

As the grass condition is a primary asset for the operation of the stadium the grass heating is prioritized to maintain optimal conditions for hosting football matches and reducing the number of grass replacements which would be costly and disruptive to the event scheduling.

Proposed Solution:

Therefore this use case aims to optimize the heat delivered to the grass heating, maintaining optimal grass root temperatures, and balance the heating demand so other systems can be served by the boilers during their peak demands between 8am and 12pm. 

    2. Continuous Commissioning


The optimization of building operation and energy consumption are high priorities for facility managers and building owners. However legacy issues resulting from multiple ad hoc installations have manifested in sub optimal operation and control logic implementation. Visual inspections and routine maintenance do not resolve or even discover these issues which continue to adversely affect energy consumption and lifecycle asset costs.

Proposed Solution:

Using the CAMPUS21 deployed integration platform, which integrates BMS data analysis and sub metering of energy consumption. These inefficiencies can be discovered and quantified so that facility managers can get the support to optimize these systems. Additionally algorithms can be developed to monitor and report suboptimal conditions which can be actioned by technical staff through optimised maintenance (repair, upgrade or reprogramming). 


Seàn Sirr
HSG Zander GmbH
CoC for Energy & Sustainability
Frankfurt, Germany
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