Energy storage in residential and commercial buildings via Liquid Organic Hydrogen Carriers (LOHC)

Daniel Teichmann, Katharina Stark, Karsten Müller, Gregor Zöttl, Peter Wasserscheid, Wolfgang Arlt
2012 Energy & Environmental Science  
This contribution proposes the usage of Liquid Organic Hydrogen Carriers (LOHC) for the establishment of a decentralised energy storage network. Due to the continually increasing amount of renewable energy within the power grid, in particular in countries of the European Union, a huge demand for storage capacities develops that can hardly be met by large-scale systems alone. Because of their high storage density and good manageability LOHC substances permit the local storage of excess energy in
more » ... of excess energy in residential and commercial buildings. Following the approach of a CHP system ('combined heat and power' or more precisely a 'combined heat and storage' system), thermal losses from the storage processes can be used for heating (and cooling) purposes in order to increase the overall efficiency. An evaluation of the economic feasibility identifies possible approaches to generate income from storage operation. The usage of exhaust heat for heating proves to significantly support the business case by providing a considerable financial contribution that is usually not exploitable for centralised storage units. Worldwide efforts to raise the share of renewable energies necessitate the installation of massive storage capacities to compensate for their fluctuating energy output in the future. The mentioned storage demand cannot be satisfied by conventional technologies for electricity storage like pumped hydroelectric storage or batteries alone. Only chemical energy carriers provide sufficiently high storage density. Liquid Organic Hydrogen Carriers (LOHC) are liquid energy carriers that can be handled in the existing infrastructure for liquid fossil fuels and enable safe and efficient storage of energy. A contribution to the prospective overall storage demand could come from decentralised units like domestic or commercial buildings which participate in the trading of surplus energy. The thermodynamic and economic feasibility of these decentralised storage units can be significantly improved by the usage of the waste heat of the storage processes for house climatisation. 9044
doi:10.1039/c2ee22070a fatcat:idk5eyjdx5blnenlknoaf3c4n4