Energy Process Engineering and Conversion Technologies for Renewable Energies

Research Projects

Current Research Projects

Renewable energy supply for grid-autonomous mobility through biogas plants

Funded byFachagentur Nachwachsende Rohstoffe e.V. - FNR
Duration12/2021 - 11/2023
Project CollaboratorDipl.-Ing. Jenny Rieck
Project PartnerInstitut für mobile Maschinen und Nutzfahrzeuge (IMN) der TU Braunschweig
Associated Project PartnersVSB Service GmbH, Abwasserverband Braunschweig

Project Objectives

For many operators of biogas plants in Germany the question arises, how an economical further operation of the plant can look like after the expiration of the promotion over the renewable energy law. This will be answered in this project with a focus on the provision of energy for rural mobility, both individual transport and the use of agricultural machinery. It will be investigated which energy source represents the most sensible solution for the mobility sector in a holistic view (energetically, economically, ecologically).

Conceivable options are the provision of electrical energy for batteries, the use of the processed biogases or biomethane in combustion engines, the production of hydrogen for fuel cell vehicles, the conversion of the biogas into synthetic liquid fuels for combustion engines, and combinations of these in hybrid vehicles. Depending on the selected variant and associated upgrading process, the heat supply by the biogas plant is affected, which must be taken into account for possible heat supply contracts. With the help of simulations of the supply as well as the demand side, the different concepts are compared. By combining the individual simulations, it is investigated whether or to what extent a biogas plant can supply a spatially closed region without connection to the natural gas grid with biomethane or hydrogen for mobility.

A freely available software package will be derived from the simulations, which will be used to make recommendations as to which concept makes the most sense for specific plants, subject to the specification of boundary conditions. In order to be able to make realistic statements here, legal and regulatory obstacles will also be researched and taken into account when deriving recommendations.