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Case Story | Fish and Bear's Palm Can't Have Both? Wanke smart buildings easily get energy efficiency upgrades and intelligent controls

Contributed by Wanke Electronics (Tianjin) Co., Ltd. 2020/1/10 10:09:43

0 Popularity: 3

  • Keywords: Wanke Intelligent Building
  • Abstract: The new building of the Minden Campus of the Bielefeld Institute of Technology has become an industry initiative for two reasons: it not only combines the latest energy and automation technologies, but is also a typical case of interdisciplinary and integrated architecture. Due to the close working relationship, designers and developers reach clear goals in terms of quality and cost.

The new building at the Bielefeld Institute of Technology's Minden campus has become an industry initiative for two reasons: it not only combines the latest energy and automation technologies, but is also a typical case of interdisciplinary, integrated architecture. Due to the close working relationship, designers and developers reach clear goals in terms of quality and cost.

Building construction does not always go smoothly. Although technical planners and construction workers usually run around the construction site, coordination and communication between the groups still need to be improved.

One of the potential causes of these difficulties is the bidding rules. Generally, the construction of a project is gradually arranged, so some companies must enter after the other teams leave-which makes technical cooperation more difficult.

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As the building owner, Bielefeld University of Applied Technology and asset management and construction company NRW have explored a new path in the construction of the application technology building on the Minden campus. "In contrast to the previous arrangement, we met all planners at the same time to create a common foundation to find the right solution," explains Oliver Wetter, Dean of the Minden Campus.

The cooperation was a success: After 22 months of construction, BLBNRW completed the construction of the new building as scheduled, and the cost was controlled within the 14 million euro budget. This is not an easy task for a construction project of this size.

Wise plan

Maintaining a budget while considering quality and cost is not an easy task: Smart buildings at the University of Applied Sciences need to be equipped with sophisticated energy and automation technologies. The Minden campus has a traditional key discipline in the field of architecture, namely the "integrated construction" graduate program.

This major brings together architects, civil engineers, and project managers to create a good foundation for students in building construction planning knowledge. Therefore, BLB NRW has designed a four-story conference center with offices, work areas, libraries, and cafes. It also provides research and teaching functions based on its modern energy system and intelligent construction technology.

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With building automation technology, lighting, energy generation and distribution, air conditioning and shading can be automatically controlled and monitored from a single system to a complete room.

Students can directly evaluate energy data through communication interfaces in the network so that they can understand how these intelligent building automation systems work and are programmed. "This allows them to further explore the usefulness of the building through research," Wetter explained.

There are not many buildings of this type in Germany. The Minden campus is currently only one of two university buildings that can meet the country's high A-level energy efficiency requirements. According to the Energy Conservation Regulations 2014, this means that the consumption of electricity and heat per square meter per year does not exceed 50 kWh.

In contrast, the consumption of public buildings is usually about twice this number-only energy efficiency level C can be reached. The reason is as follows: In order to achieve consumption level A requirements, investment in indoor automation is necessary.

However, the budget for the public sector has been inadequate since the energy efficiency class began in 2012. The campus engineering of the University of Applied Sciences costs a total of 113,000 Euros in smart building automation. "We can convince principals that higher energy efficiency levels will help research and teaching," Wetter said.

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Discussion: In the brand-new campus library, Oliver Wetter, Dean of the Minden Campus, Nina Jesusek, BLB Architect, Stefan Fleth, Building Management Department of Bielefeld University of Applied Technology, and Jörg Gruner Review of implementation

There is no doubt that building automation may initially cost more, but the savings in operating costs over the life of the building far exceed its own costs. In order to save more energy, the building uses well-insulated exterior walls, recovers waste heat from the server in the computer room, and replenishes energy from the geothermal system. The detector converts the surface heat energy into a heat pump to increase the geothermal temperature and provide heat to the building.

Due to the reversible operation of the heat pump, libraries, cafes, lounges, conference rooms and workshops can be cooled by underground heating systems and radiant heating ceiling control panels-and the energy extracted here can be regenerated into geothermal detection fields. The second heat pump is connected to the storage unit of the server's cooling / geothermal system and is also used in the combined heating system. Gas condensing boilers provide hot water and are used for extreme loads. In addition, free cooling technology is also used in the combined refrigeration system.

The technical design of the whole system is to minimize the initial energy consumption. The BACnet / IP controller of the open universal WAGO-I / O-SYSTEM 750 via BACnet plays an important role in factory and room automation.

A total of 21 such systems were installed in the new building. Seven controllers form a traditional information node for heating, air conditioning and cooling, and 14 devices are used to implement automation functions on different floors. All control devices are connected together via Ethernet. At the same time, BACnet provides a set of standard, open source data communication protocols.

Devices from different manufacturers can communicate according to detailed construction plans (assuming these devices also support the BACnet standard). As the controller of the measurement, control, and regulation system, Wanke Technology ensures that the central system functions such as heat pumps or geothermal are accurate, and together with the ventilation system, it always provides the required temperature.

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Wanke BACnet / IP Controller

Room automation includes lighting, shading and room temperature control. In practice laboratories and conference rooms also use CO2 gas quality controllers. The feedback signals from the window contacts are detected and processed by an automatic program.

In order to detect all indoor signals, HermosAG in Mistelgau uses the modular structure of WAGO-I / O-SYSTEM and special controllers for the DALI, KNX and SMI sub-bus systems. The different functions of the room are activated by the KNX room operating device.

According to the instructions in the system integration form, all equipment and room automation information, and the monitoring functions of all building systems are connected to the BACnet management service equipment for monitoring and adjustment at any time, so as to achieve the recording and analysis of building energy data, Changes to setpoints and occupancy times. All values and states, such as temperature, operating information and system errors, can be visualized in the form of predictions or retrospectives via the delay function.

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As part of the eu.bac certification process, experienced Wanke experts conduct a rigorous review of the building technology of the Minden District. The audit creates a transparent environment and provides comprehensive building automation technology information to operations personnel. Systematic assessment helps to achieve target energy savings and operating costs throughout the life cycle. To this end, eu.bac building system certification sets new standards.

In the previous certification process, building technology was seriously neglected: however, the eu.bac certification in 2013 made up for this gap. This procedure is based on scientific test data and the relevant DIN EN 15232 European standard. Audits must be performed by professionals trained and certified to eu.bac (European Building Automation Control Association) standards.

The Minden project has pioneered in many ways. It is not only a model of interdisciplinary, integrated architecture, but also explains how energy efficiency can be continuously improved with modern building automation and assessment methods.

The "eu.bac system" certification demonstrates that the optimal comfort achieved by the technology and automation of the campus building is sustainable and energy efficient. As part of the eu.bac certification process, experienced Wanke experts conducted a close and careful review of the building technology of the Minden District.

Review editor (Wang Jing)
For more information, please visit Wanke Electronics (Tianjin) Co., Ltd. ( http://c.rgwds.com/?cid=41817 )

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