IEA SHC Task 42/ECES Annex 29 – A Simple Tool for the Economic Evaluation of Thermal Energy Storages

Christoph Rathgeber, Stefan Hiebler, Eberhard Lävemann, Pablo Dolado, Ana Lazaro, Jaume Gasia, Alvaro de Gracia, Laia Miró, Luisa F. Cabeza, Andreas König-Haagen, Dieter Brüggemann, Álvaro Campos-Celador, Erwin Franquet, Benjamin Fumey, Mark Dannemand, Thomas Badenhop, Jan Diriken, Jan Erik Nielsen, Andreas Hauer

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Abstract

Within the framework of IEA SHC Task 42 / ECES Annex 29, a simple tool for the economic evaluation of thermal energy storages has been developed and tested on various existing storages. On that account, the storage capacity costs (costs per installed storage capacity) of thermal energy storages have been evaluated via a Top-down and a Bottom-up approach. The Top-down approach follows the assumption that the costs of energy supplied by the storage should not exceed the costs of energy from the market. The maximum acceptable storage capacity costs depend on the interest rate assigned to the capital costs, the intended payback period of the user class (e.g. industry or building), the reference energy costs, and the annual number of storage cycles. The Bottom-up approach focuses on the realised storage capacity costs of existing storages. The economic evaluation via Top-down and Bottom-up approach is a valuable tool to make a rough estimate of the economic viability of an energy storage for a specific application. An important finding is that the annual number of storage cycles has the largest influence on the cost effectiveness. At present and with respect to the investigated storages, seasonal heat storage is only economical via large sensible hot water storages. Contrary, if the annual number of storage cycles is sufficiently high, all thermal energy storage technologies can become competitive.
Original languageEnglish
JournalEnergy Procedia
Volume91
Pages (from-to)197-206
Number of pages10
ISSN1876-6102
DOIs
Publication statusPublished - 2016
Event4th International Conference on Solar Heating and Cooling for Buildings and Industry 2015 - Istanbul, Turkey
Duration: 2 Dec 20154 Dec 2015
Conference number: 4

Conference

Conference4th International Conference on Solar Heating and Cooling for Buildings and Industry 2015
Number4
CountryTurkey
CityIstanbul
Period02/12/201504/12/2015

Bibliographical note

© 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Keywords

  • Sensible Heat Storage
  • Latent Heat Storage
  • Thermochemical Heat Storage
  • Storage Capacity Costs

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