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Open Access Storage of Heat, Cold and Electricity

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A promising energy storage system is presented based on the combination of a heat pump, a heat engine, a hot and a cold storage. It can be operated as a pure bulk electricity storage (alternative to Pumped Heat Electrical Storage (PHES)/Compressed Air Energy Storage (CAES)) or as combined storage of heat, cold and electricity. Both variations have been evaluated using a steady state, thermodynamic model and two promising concepts are proposed: A transcritical CO2 cycle for the pure electricity storage and a subcritical NH3 cycle for combined storage of electricity, heat and cold. Parametric studies are used to evaluate the influence of different parameters on the roundtrip efficiency of the storage system.

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Keywords: DUAL ENERGY STORAGE & CONVERTER; ELECTRICITY STORAGE; POWER-TO-HEAT; REVERSIBLE HEAT PUMP

Document Type: Research Article

Affiliations: 1: Group Thermal Energy Storage (TES), Competence Centre Thermal Energy Systems & Process Engineering, Lucerne University of Applied Sciences and Arts, CH-6048 Horw, Switzerland 2: Group Thermal Energy Storage (TES), Competence Centre Thermal Energy Systems & Process Engineering, Lucerne University of Applied Sciences and Arts, CH-6048 Horw, Switzerland. [email protected]

Publication date: December 1, 2015

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  • International Journal for Chemistry and Official Membership Journal of the Swiss Chemical Society (SCS) and its Divisions

    CHIMIA, a scientific journal for chemistry in the broadest sense, is published 10 times a year and covers the interests of a wide and diverse readership. Contributions from all fields of chemistry and related areas are considered for publication in the form of Review Articles and Notes. A characteristic feature of CHIMIA are the thematic issues, each devoted to an area of great current significance.

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