Practical comparison of different storage strategies for plus-energy buildings in exemplary residential estates
The aim of the project is the practical and theoretical investigation of central storage facilities ('estate electricity storage') for surplus regenerative (PV) energy. These investigations include aspects of economic efficiency and energy performance. In a two-year monitoring project to be performed at the Living Lab platform of the Federal Association of German Prefabricated Construction (Bundesverband Deutscher Fertigbau e.V.) at the Wuppertal exhibition of prefab homes, various storage concepts will be directly compared in terms of their different degrees of self-use and rates of self-sufficiency.
In a first step, the existing measurement technology will be enhanced to ensure that all the required measurement data can be provided during the project term. The measured data recorded for each single building will be transferred to a data cloud which is accessed by the IBP’s data acquisition system (IMEDASTM - Only German), which subsequently stores all data in a database. The collected datasets provide the basis for analyzing the energy flows inside the buildings or within the residential estate. In the first year of the 2-year measuring campaign, the estate is going to be operated without any storage unit; here, the shift of electricity among the buildings will be analyzed. In the second year of measurement, a central electricity storage unit will be integrated into the estate’s electricity supply network. Subsequently, both years are going to be compared with regard to electricity self-use and the rate of self-sufficiency.
In parallel, a numerical assessment will examine and compare different variants of electricity supply, ranging from traditional, decentralized solutions to innovative, centralized concepts for city districts.
Every month, the current consumption data of the individual buildings is presented on the website of the research initiative 'Zukunft Bau' ('Future Construction'):
The project receives funding from The German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMUB), represented by the Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR).