Central building Leuphana University Lüneburg

Building description

NameCentral building Leuphana University Lüneburg
LocationLüneburg
Building OwnerLeuphana Universität
PartnerSynavision, SIZ
Type of buildingUniversity building
Use typeLectures, Seminars, Offices, Cafetéria, internal and public events (Concerts, Theater, etc.)

The Building

The building was designed by architect Daniel Libeskind with the intent of disrupting the linear and firm structure of the former military barracks, while creating a symbol for the future. It was formally opened in 2007 after a five-year construction phase, completing an indoor area of 17.700 m². This includes a multifunctional hall which can seat up to 1100 guests, not only for lectures but also for concerts, plays and other events. The university building also houses a cafeteria, research facilities, classrooms and offices. 100% of its energy needs are provided by renewable energy. It has a primary energy demand of 50% compared to the EnEV reference building.

Quality Management

At Leuphana, TMonP and Cx was applied starting in the late construction phase. The services had been divided into three phases:

  • The project started with a technical quality management to derive performance objectives and to check the status as built.
  • Prior to the approval the technical performance of the building automation was tested in a trial operation of two weeks.
  • Following the trial, monitoring of building operation for the first two years of occupation was commenced.
Building owner:Leuphana Universität
Facility Management:Leuphana Universität
TMon/ Cxenergydesign GmbH, Braunschweig

During the start-up phase, various inspections were arranged to measure and test the functionality of the air-conditioning, cooling and heating systems. Additionally, on-site visits were arranged to determine the quality of execution in reference to the configuration of hydraulics for the air-conditioning, cooling and heating systems. During the trial operation – carried out before the official hand-over – the data of the building automation was recorded for two weeks. Inspections are now taking place in semi-annual cycles to examine the performance in the first years of operation and to evaluate the weather-related system status.

Building’s technical equipment

System/typePower, source/fuel type, size, circuits …Selected for QM-process
HeatingDistrict heating
  • Domestic hot water
  • CentralAHU heating
  • Underfloor heating
  • Static heating surfaces
Yes
Hot water storageCentral hot water storage and decentral electrical continuous-flow water heaters 1 m³Yes
CoolingDistrict cooling
  • Cooling ceilings
  • Recirculating air conditioning units
  • Media technology
  • Server
Yes
Ventilation6 central devices130.000 m³/hYes
Cold sourceCompression refrigeration machineElectricityNo
LightingLEDElectricityNo
Electrical supplyPVNot yet installedNo

Energy Performance (Evaluation of Savings)

EnergyCarbon
Baseline (kWh/a)Savings (kWh/a)%Savings (kg/a)
Heating Energy1 013 34057 6005,717 850
Cooling Energy1 94 84719 1009,810 800
Electricity4 67 7354 300<12430

Operational Performance

In this project it was crucial to implement the functional performance test before official approval to identify energy saving potential right from the beginning.

In sum 134 issues have been detected, which would have influenced the building performance negatively in the early operational phase.

In detail, 7 issues can be allocated to cooling systems, 69 to heating systems and 58 to the air handling units.

This leads to estimated energy savings of 81 000 kWh per year or 31 080 kg of CO2. The static payback period is less than two years. In the first two years the operational performance will be monitored.