The IBA Network research project is the follow-up project to EnEff:Stadt IBA Hamburg - CO2-neutral energy supply for the Elbe island. Its goal is a comprehensive system analysis of the structures established in the basic project and their integral optimization: from individual components of the system technology and interfaces to the standardization of energy and quality management including monitoring for highly efficient buildings. By extending the system boundary from the building to the district, the possibility of offsetting surpluses from new buildings against existing buildings is to be researched and the quantification expressed in a district key figure.
The IBA Hamburg's field of action is the Elbe island between Norderelbe and Süderelbe in the Wilhelmsburg district. The aim is to realize a sustainable energy concept for the urban area. The energy production and energy consumption of the entire area and the individual projects are to be monitored and analyzed as part of the accompanying research and the key data determined and documented.
- Monitoring update
- Analysis of the buffer effect of local heating networks
- Energetic, ecological and economic evaluation of individual systems
- Development of a future scenario for neighborhoods
Interesting links:
- http://www.iba-hamburg.de/
Building monitoring:
In the basic IBA Hamburg project (2013 - 2016), a measurement system for high-level monitoring was set up in nine building types of different categories and uses. High-level monitoring refers to the automatic and high-resolution recording and evaluation of detailed measured values from the operation of these buildings. In addition, total consumption values for 27 other buildings in the IBA district are available from the low-level monitoring. The data already recorded will be used as a basis for optimizing operations. Meanwhile, monitoring in the buildings will continue in order to analyze the development of usage behavior.
Sub-projects:
BIQ - The Algae House
The BIQ is a residential building with 15 residential units. Bioreactors in which microalgae grow are installed on the south-east and south-west façades. In addition to the solar energy that the algae absorb, some of the heat is absorbed by the water. This surplus heat from the bioreactors is integrated as a source for the building's heat supply. The building is supplied with electricity via a PV system and connection to the public power grid.
In principle, the heat supply is divided into the provision of heating and domestic hot water. A brine-water heat pump is used to generate heat, which draws heat from geothermal probes on the source side. Excess heat from the bioreactors can be fed into the geothermal probes to regenerate the ground during the summer months. Domestic hot water is produced using a gas boiler and a connection to the Wilhelmsburg Mitte local heating network. The exhaust gases from the gas boiler are fed into the bioreactors to supply the algae with CO2. As the operation of the gas boiler is linked to the CO2 requirements of the algae in the bioreactors, excess heat is generated and fed into the local heating network.
The original BIQ concept envisaged that the heat from the façade would be used to support the heating and domestic hot water supply as well as soil regeneration. However, building operation has shown that the necessary temperature levels for the former are rarely available and that the timing of heat demand and production did not always match. In addition, there was a great need for cooling in the summer months. In order to make better use of the heat, it is therefore worth raising it to a higher level using a drinking water heat pump. The higher source temperature at the heat pump significantly increases its coefficient of performance and reduces overall energy consumption. In addition, the façade can be cooled better on particularly warm days because not only the cooling capacity of the geothermal probes is used, but also the cooling capacity of the heat pump.
In order to combine all the elements with each other and optimally manage the heat flows, a parameter-based concept was developed for an automatic control system that records the system as a whole and activates, adjusts or deactivates all the elements in a sensible combination. By focusing on a few carefully selected parameters, it is possible to switch flexibly between energy and biologically optimized operation. The concept is being used by SSC GmbH as part of a project funded by Zukunft Bau to redesign the existing control system and convert the plant technology.
WP1 Monitoring update
Continuation of data collection and data evaluation for the energy, ecological and economic assessment of the concepts
Presentation of the relevance for the Wilhelmsburg 2050 perspective
WP2 Building networking
Optimization of the building interfaces to the heating networks
Review of the planning objectives
Improvement of feed-in potential Optimization of operating modes Expansion of renewable energies in the context of power to heat
WP3 Operational optimization of building concepts
Identification and communication of optimization potentials
Follow-up of exploited potential (quality control)
Development of a permanent energy and quality management system (EQM easy)
WP4 IBA Online
Integration of new projects (building owners and operators) into an energy and quality management concept
Pursuit of efficiency potential in new and existing buildings with regard to the 2050 energy policy goals
Transparent updating of the status targets
WP5 Added value of IBA
Use of the IBA database as a real laboratory to validate newly developed simulation tools for the neighborhood and city level
Networking with ongoing EnEff:Stadt projects (Campus, Neue Weststadt Esslingen, Vernetzte Quartiere Wolfsburg, Energie-Tool-KIT and others)