TY - JOUR A1 - Laband, Dana Laureen A1 - Stöckl, Martin A1 - Mittreiter, Annedore A1 - Holzhammer, Uwe T1 - Barrier Analysis of Flexibilization of Cooling Supply Systems JF - Energies N2 - The present study examines the barriers that prevent cooling system flexibility from being optimized. In the context of an increasing reliance on renewable energy sources, the necessity for flexible energy utilization is becoming increasingly apparent. A survey and discussion groups were conducted with various stakeholders within the cooling value chain to obtain their experiences and insights regarding barriers to flexibilization. The findings point out that economic, technological, and regulatory barriers are the primary factors impeding the implementation of flexible solutions. In particular, high investment costs, complex technical implementation, a lack of information, and a complicated legal framework were identified as significant impediments. To enhance the flexibility of cooling systems, coordinated efforts are necessary to address these barriers. Practical examples, training, and the standardization and digitalization of processes could facilitate the widespread implementation of flexible cooling systems. UR - https://doi.org/10.3390/en18154133 Y1 - 2025 UR - https://doi.org/10.3390/en18154133 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:573-61098 SN - 1996-1073 VL - 18 IS - 15 PB - MDPI CY - Basel ER - TY - JOUR A1 - Selleneit, Volker A1 - Stöckl, Martin A1 - Holzhammer, Uwe T1 - System efficiency: methodology for rating of industrial utilities in electricity grids with a high share of variable renewable energies BT - a first approach JF - Renewable and Sustainable Energy Reviews UR - https://doi.org/10.1016/j.rser.2020.109969 KW - system efficiency KW - industrial utilities KW - variable renewable energies KW - residual power KW - flexibility KW - electricity price time series Y1 - 2020 UR - https://doi.org/10.1016/j.rser.2020.109969 SN - 1364-0321 VL - 2020 IS - 130 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Selleneit, Volker A1 - Stöckl, Martin A1 - Philipp, Matthias A1 - Mast, Tanja A1 - Holzhammer, Uwe A1 - Schlosser, Florian T1 - System efficiency rating of industrial utilities in electricity grids with a high share of variable renewable energies JF - Chemical Engineering Transactions UR - https://doi.org/10.3303/CET1976163 Y1 - 2019 UR - https://doi.org/10.3303/CET1976163 SN - 2283-9216 VL - 2019 IS - 76 SP - 973 EP - 978 PB - AIDIC CY - Mailand ER - TY - JOUR A1 - Stöckl, Martin A1 - Selleneit, Volker A1 - Philipp, Matthias A1 - Holzhammer, Uwe T1 - An approach to calculate electricity costs for the german industry for a system efficient design by combining energy efficiency and demand response JF - Chemical Engineering Transactions UR - https://doi.org/10.3303/CET1976191 Y1 - 2019 UR - https://doi.org/10.3303/CET1976191 SN - 2283-9216 VL - 2019 IS - 76 SP - 1141 EP - 1146 PB - AIDIC CY - Mailand ER - TY - JOUR A1 - Schweizer, Manuel A1 - Stöckl, Martin A1 - Tutunaru, Robin A1 - Holzhammer, Uwe T1 - Influence of heating, air conditioning and vehicle automation on the energy and power demand of electromobility JF - Energy Conversion and Management: X N2 - With the increasing number of electric vehicles in the transport sector, the relevance of accurate energy and power demand predictions of electromobility is growing. Thereby, different vehicle functions, especially heating and air conditioning and vehicle automation, have a significant influence. In accordance with the upcoming Euro-7 emissions standard, the energy consumption for heating even has to be contained in the manufacturer’s consumption data in the future. To increase the accuracy of energy and power demand predictions of electromobility, the energy consumption of vehicle functions such as heating and air conditioning as well as the energy savings through vehicle automation must be considered. This paper presents approaches for modeling and simulation the energy consumption of heating, air conditioning and vehicle automation which can be used as an extension of electric vehicles WLTP (Worldwide Harmonized Light-Duty Vehicles Test Procedure) consumption simulation on the level of vehicle classes. The Germany-wide results of the electric vehicles energy demand for heating and air conditioning on the level of NUTS3-areas (Nomenclature of territorial units for statistics) and vehicle classes show regionally different results and confirm the relevance of the research approach. Vehicle automation results are described on the level of the five SAE automation levels (Society of Automotive Engineers automation levels) and the vehicle classes. The approaches and results can be used for single vehicles or assumed vehicle fleets. UR - https://doi.org/10.1016/j.ecmx.2023.100443 KW - Energy system modelling KW - Electromobility KW - Heating and air conditioning KW - Vehicle automation KW - Energy demand KW - Power demand Y1 - 2023 UR - https://doi.org/10.1016/j.ecmx.2023.100443 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:573-38868 SN - 2590-1745 VL - 2023 IS - 20 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Stöckl, Martin A1 - Idda, Johannes A1 - Selleneit, Volker A1 - Holzhammer, Uwe T1 - Flexible Operation to Reduce Greenhouse Gas Emissions along the Cold Chain for Chilling, Storage, and Transportation - A Case Study for Dairy Products JF - Sustainability N2 - The further expansion of renewable energies in Germany requires flexible consumers to balance fluctuations in electricity production from variable renewable energies. Cold storage warehouses, due to their inherent storage capacity and widespread use, are well-suited for integrating more renewable energies. The potential of cold storage warehouses is often viewed in isolation and not in conjunction with the cold chain’s upstream and downstream processes. By adjusting the temperatures within the processes, the individual links in the cold chain can be made flexible. To assess the effects of flexibilization on emissions and electricity costs, thermodynamic models of the individual links in the cold chain and of a yogurt pallet are developed and linked together. Due to temperature fluctuations in the products resulting from the flexibilization, emission evaluations must be considered throughout the cold chain. Results of the simulation for the study period show that emissions reductions and electricity cost savings can be achieved in all three links when they are made flexible. However, the savings vary in magnitude. Only minor savings can be achieved in the cooling tunnel. The greatest potential for savings is in refrigerated transport, if deeper cooling occurs in the process before, i.e., in the cold storage warehouse. UR - https://doi.org/10.3390/su152115555 KW - flexibility KW - flexible energy demand KW - system efficiency KW - cold storage warehouse KW - refrigerated transport KW - cold chain KW - variable renewable energies KW - industry KW - dairies Y1 - 2023 UR - https://doi.org/10.3390/su152115555 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:573-40844 SN - 2071-1050 VL - 15 IS - 21 PB - MDPI CY - Basel ER - TY - JOUR A1 - Stöckl, Martin A1 - Holzhammer, Uwe T1 - Integration von Flexibilität in die Energieversorgung BT - Ein Aspekt zur Erreichung der Klimaziele und zur Stabilisierung der Energiekosten - Fallbeispiel Kühlhaus JF - Ernährung aktuell - der Lebensmittelbrief Y1 - 2024 SN - 1866-6787 VL - 35 IS - Mai/Juni SP - 46 EP - 47 PB - LID CY - Lampertheim ER -