Execution supervision and technical controlling for the supply center II (VZII) project

The service centre building is located on a two-storey basement structure (2nd basement with approx. 1,750 m2 GFA + 1st basement with approx. 2,800 m2 GFA). Approximately 1/3 of the space in the west is used to house the technical rooms for the service center itself.

The remaining areas (2/3) in the east towards Domagkstraße house the technical facilities of VZ II, some of whose devices and installations require a clear ceiling height of approx. 8.0 m. Exhaust pipes, cooling water pipes and other media lines are routed in vertical shafts through the entire high-rise building to the roof.

The roof of the service centre serves as an installation area for the recooling plants for refrigeration and other technical systems. The central circulation core leads the fire brigade elevator and the staircase up to the roof. Attached to it, a shaft structure (chimney) protrudes approx. 6.0 m above the roof surface, which ensures the operation and exhaust gas routing of the VZ II.

In addition, on the 10th floor and on the technical floor above, there are 2 cooling water tanks made of reinforced concrete with a capacity of approx. 30 m3 of cooling water.

In the future, the VZII will mainly house the following technical facilities and facilities on the cooling and heating supply side:

Heat supply:

District heating

The projected heat output for the campus area of the UKM to be supplied is:

QFW ca. 10,0 MW

To supply the local heating network on the UKM campus, a modular district heating exchanger station consisting of a total of 3 district heating exchangers arranged in parallel, each with a transformer capacity of 5.0 MW, is planned.

The required district heating is provided by the district heating network of the University of Münster.

Combined heat and power plant (CHP)

To ensure an energy-efficient heat supply as well as a decentralised self-supply of electricity, a gas-powered CHP unit with a generator output PElt. 2.0 MW is an integral part of the overall concept. The CHP was designed in such a way that both a company with

- conventional natural gas

- Biomethane

- Admixture of hydrogen into the natural gas grid

possible.

With regard to the planned plant design, the CHP is operated exclusively in a heat-controlled manner, so that the CHP/CHP high-efficiency criteria are always met in operation. The CHP unit is planned with a 10 kV generator in order to feed the generated electrical energy into the UKM's internal 10 kV grid without transmission losses.

Hochtemperaturwärmepumpen (HT-WP)

The overall system is supplemented by two high-temperature heat pump systems. The heat pumps are primarily used to cover the relatively low cooling capacity demand of the connected properties in the winter months, regardless of the weather, and at the same time to supply the heating network with the waste heat generated in the process.

The heating/cooling capacity in winter operation is: approx. 2 x 1.0 MW / 2 x 0.65 MW

Cold supply:

Absorptionskältemaschine

In order to optimize the operating hours of the planned CHP unit, an absorption chiller (LiBr) with a cooling capacity of QK = 1.5 MW is planned, which will be supplied with the CHP waste heat as heating media in the summer months.

Hocheffizienzkältemaschine

Another component of the refrigeration supply is a high-efficiency chiller with oil-free turbo compressors. The cooling capacity of this unit is QK = 3.4 MW.

Turbo chillers 10 kV (2nd expansion stage)

For the future final expansion (2nd expansion stage), two turbo chillers with a cooling capacity of QC = 4.3 MW each are planned. These chillers are supplied with the necessary electrical energy directly from the medium-voltage grid.

Kühlwassersystem

The refrigeration generators are supplied with the required cooling water by a central cooling water network with open recooling units placed on the roof area as well as a cooling water storage tank on the 10th floor/technical floor. The cooling water network contains all technically required components and aggregates (such as pumps, filters, fittings, biocide dosing equipment, UV disinfection, etc.).

For reasons of corrosion protection, the cooling water network is built almost entirely from plastic pipes. The maximum nominal pipe diameter for this system is DN500.

The necessary additional water is provided by a central water treatment plant, essentially consisting of the necessary dosing systems, the reverse osmosis system, the storage tanks, the blending device and the pressure booster system, etc.

Pipeline networks for heating/cooling supply

The pipeline networks for the cooling and heating supply are made of steel pipe with welded and flanged connections and contain all the necessary aggregates and components (such as pumps, fittings, pressure maintenance and degassing, safety devices, etc.). The maximum nominal pipe diameter for these systems is DN500.

Ventilation systems

The planning takes into account all the ventilation systems required for the operation of the supply centre II for the dissipation of process-related heat loads, for the supply of combustion air and other concerns. The total conveying volume of all required systems amounts to a total of approx. 93,000 m3/h.

building automation

A DDC system consisting of automation stations (AS) and modular modules for analogue and digital input/output (I/O) is used to control, regulate and monitor the building technology systems. All automation stations will be integrated into the LAN network of the UKM. This also applies mutatis mutandis to network-capable aggregates, such as chillers, which have BaCnet/IP or Modbus TCP/IP interfaces.

The connection to the higher-level building management system (BMS UKM) is made via a BACnet interface.