Project Stakeholder

Studierendenwerk Mannheim AöR – Germany

Facility and Initial Situation

Facility

  • 8 halls of residence with 370 apartments for 775 students

Initial Situation

  • Former military buildings from the 1930s to 1960s.
  • Some buildings have been upgraded approximately 10 to 15 years ago regarding building insulation.
  • Technically the buildings were all in need of major renewal works.

Goals and Measures

Goals of building owner

  • Reduction of energy and water consumption
  • upgrade of technical equipment (heating and sanitary systems and lighting as well as controls)
  • energetic renovation of one building (minimum requirement: fulfilling energy efficiency standard KfW 100)

Measures

  • Complete energetic renovation of 1 building with 43 student apartments (insulation of walls, roof and cellar ceiling, new windows and access doors, installation of AHUs for controlled minimum air change)
  • Renewal of heating substations (energy supply by district heating)
  • Upgrade of water supply (new shower heads, toilet flushes etc.) in rooms to reduce water consumption
  • Implementation of hydraulic balance
  • Renewal of thermostat valves (> 1.500)
  • Implementation of hydraulic balance of heating system
  • Replacement of lighting systems by LED (> 3.000 lamps)
  • Implementation of metering concept for heating, electricity and water
  • installation of new controls (DDC substations) and implementation of cloud solution for BMS and EMS

Facts

Installation of energy efficiency measures

2017

Duration of the contract

 8 years

Investment

2.417.135 €

Energy costs (Baseline: 2017)

453.288 €

Guaranteed savings in Euro

145,049 €/a

Guaranteed savings in %

32%

Reduction of CO2 emissions

157 t/a

Innovations and Client’s Advantage

  • To our knowledge this is the first Energy Savings Performance Contracting Project that includes the complete energetic renovation of a building to achieve an acknowledged standard for a low energy consumption building, in this case KfW efficiency building standard 70 meaning 30 % less energy consumption than a new building according to government regulations (EnEV).
  • Beside the implementation of technical measures the project also included providing guidance for students how to air their apartments responsibly regarding loss of heating and other issues regarding electricity and water consumption.
  • The customer decided based on the in-depth-study to install photovoltaic systems on the roofs of each building (between 10 and 20 kWpeak depending on building and roof size) in addition to the ESPC project (investment of about 150.000 €)

Picture: © E1 Management GmbH

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