Values of Latent Heat and Thermochemical Energy Storage Technologies in Low-carbon Energy Systems: Whole System Approach

Xi Zhang, Hossein Ameli, Zihang Dong, Andrea Vecchione, Alejandro Gallego Schmid, Goran Strbac, Adriano Sciacovell

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Thermal energy storage (TES) is widely expected to play an important role in facilitating the decarbonization of the future energy system. Although significant work has been done in assessing the values of traditional sensible TES, less is known about the role, impact and value of emerging advanced TES at the system level. This is particularly the case of latent heat thermal energy storage (LHTES) and thermochemical energy storage (TCS). In this context, this paper is dedicated to evaluating the techno-economic values for the whole UK energy system of LHTES and TCS technology using an integrated whole energy system model. First, the key concepts of the whole system modelling framework are introduced. Unique to this work is that the economic benefits delivered by LHTES and TCS to different levels of the UK energy system infrastructure and various energy sectors through the deployment of TES are explicitly analysed, which comprehensively demonstrates the values of selected TES technologies from the whole system perspective. A series of sensitivity studies are implemented to analyse the advantages and disadvantages of LHTES and TCS under different conditions. The simulation results indicate that TES can benefit different sectors of the whole energy system and drive significant cost savings, but the whole system values of TES is closely dependent on the decarbonization requirement. Although LHTES is characterized by relatively low capital costs, when TES penetration is limited and carbon target is tight, the advantage of TCS is outstanding due to its high energy density.

Original languageEnglish
Article number104126
JournalJournal of Energy Storage
Publication statusPublished - 1 Jun 2022


  • Climate change
  • Thermochemical energy storage
  • Decarbonization
  • Latent heat thermal energy storage
  • Energy system integration


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