The role of storage technologies throughout the decarbonisation of the sector-coupled European energy system
arXiv:1906.06936 · doi:10.1016/j.enconman.2019.111977
Abstract
We use an open, hourly-resolved, networked model of the European energy system to investigate the storage requirements under decreasing CO emissions targets and several sector-coupling scenarios. For the power system, significant storage capacities only emerge for CO reductions higher than 80% of 1990 level in that sector. For 95% CO reductions, the optimal system includes electric batteries and hydrogen storage energy capacities equivalent to 1.4 and 19.4 times the average hourly electricity demand. Coupling heating and transport sectors enables deeper global CO reductions before the required storage capacities become significant, which highlights the importance of sector coupling strategies in the transition to low carbon energy systems. A binary selection of storage technologies is consistently found, i.e., electric batteries act as short-term storage to counterbalance solar photovoltaic generation while hydrogen storage smooths wind fluctuations. Flexibility from the electric vehicle batteries provided by coupling the transport sector avoid the need for additional stationary batteries and reduce the usage of pumped hydro storage. Coupling the heating sector brings to the system large capacities of thermal energy storage to compensate for the significant seasonal variation in heating demand.
arXiv comment22 pages, 13 figures
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