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TU Berlin

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VG 2.0 as nature based solutions: Food-Water-Energy-Nexus at the building scale

Lupe

Objectives:

  • Models and simulation tools for the quantification of water demand and biomass (bioenergy) production for different living walls and green facades planted with different plant species are developed and tested,
  • Systems for cleaning, storage and irrigation are developed that facilitate the integration of VG into onsite-rainwater, storm water and gray water management of buildings and quarters deriving corresponding requirement specifications,
  • The potentials for bio-energy production and energy saving of different designs are quantified for a set of up to 10 different typical building facades

Examples of the work in the WP:

In Addition to the investigation of biomass production and water demand of vertical green at the TU Berlin, both parameters are also monitored in the BOKU site. Thereby, radiation, air temperature and humidity, interception, wind and substrate moisture are monitored. Data is automatically processed via R-Code (developed in an ongoing master thesis about the water demand of this living wall system). In a second master thesis plant growth and biomass production is monitored. The generated knowledge is an interlink to WP3 and provides information about design adaptations, use of plants for different settings and data on the interaction of building and greenery.

A living wall pilot system for the treatment of greywater is installed at BOKU. Three lines with three planter boxes serve the purpose to investigate (i) treatment of greywater in two hydraulic regimes (horizontal and vertical flow) and (ii) a water extensive irrigation practise. The artificial greywater recipe is developed tested and shared with the project partner TUB. The pilot system is now under full operation for one year. Results of the effluent concentrations show a good treatment performance for both flow regimes. In the coming period, different operational parameters will be under investigation in order the get a better understanding of the system and the sensitivity of the operational parameters on the treatment performance. Based on these results the demonstration site is designed. To support the experimental research a literature review will be compiled to compare our system to the actual state of the art in this field.

Lupe

The data from the test sites is used to calibrate and validate the simulation tool that the TU Berlin has been working on in cooperation with UIRS on additional climbing species.

An accessible open source tool for simulating the energy balance of greened vs. non greened buildings has been set up for climbers. A set of relevant building types has been implemented into the model and a scenario analysis has been conducted.

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