By the year 2050, the demand for heat in buildings should be almost climate-neutral. At the same time, decentralised energy supply, the sector coupling of electricity and heat, the efficiency of plant technology and user behaviour play an important role. The partners medl GmbH, Viessmann Deutschland GmbH, EBZ Business School and the University of Duisburg-Essen intend to support this project by developing an energy efficiency assistant. The basic idea is to design the energy supply and operational management for a neighbourhood in such a way that CO2 emissions are minimised. Therefore, a large part of the electrical energy demand is to be covered by local energy generation, a combination of PV and CHP. Decentrally generated electrical energy is stored locally or used to recharge batteries in electric vehicles. In addition, depending on the situation in the distribution network (supply of regenerative energy), the heat requirement is also to be covered by electricity.

One task of the Energy Efficiency Assistant is to synchronise local generation (via CHP and PV) and local consumption in such a way that feeding into the distribution network is minimised. Preferably, the locally generated electricity should be consumed locally. For this purpose, the loading (battery storage + electric vehicles) and unloading (battery storage) of the local storage facilities (battery storage + electric vehicles) are used as well as the shifting of larger loads (household appliances, building services engineering) to times of a sufficient supply of locally produced energy. The basis for the management of the locally generated energy is a procedure to be developed for load forecasting, which takes into account the generation of PV (weather information) as well as the energy demand on the consumption side (prediction on the basis of consumption data for electricity and heat).

A new central heating plant will be built in the Bottenbruch district of Mülheim an der Ruhr. This plant will consist of a combined heat and power unit (CHP) with an output of 50 kW and a photovoltaic system (planned 30 kWp) as well as a large battery storage (planned 30 kWh). In the project, a local heating network will be installed and two apartment buildings with 48 apartments will be connected to the central heating system. In addition, an infrastructure for the management of locally generated energy, smart home systems for energy management and appropriate measurement technology will be installed and implemented in the buildings by the partners, so that the energy efficiency assistant can be operated at the optimal operating point, adjusted to the neighbourhood.

The planned supply system will consist of the following components at the extended stage:

CHP
photovoltaic system
Charging stations for electric scooters and electric cars
Battery storage 30kWh
Forecasting weather information
Prediction of local consumption (load forecast in the neighbourhood)
Demand Side Management System (Smart Home System)
Smart meters for every home

Here you can view more technical information about the project.