Exergy analysis of thermal energy storage in a district energy application

Behnaz Rezaie, Bale V. Reddy and Marc A. Rosen

Renewable Energy, 2015, vol. 74, issue C, 848-854

Abstract: The role of thermal energy storage (TES) in district energy (DE) system is assessed. The Friedrichshafen DE system is considered as a case study and exergy analysis is utilized. The TES is designed to complement and to increase the effectiveness of the solar panels included in the district energy system. The TES stores the surplus solar energy until is needed by thermal energy users of the Friedrichshafen DE system. The results quantify the positive impact of the TES on the performance of the Friedrichshafen DE system, and demonstrate that the overall energy and exergy efficiencies of the TES are 60% and 19%, respectively. It is also shown over an annual period that the temperature, energy, exergy and energy efficiency of the TES exhibit similar trends and that the TES exergy accumulation and exergy efficiency exhibit similar trends.

Keywords: Thermal energy storage; District energy; Solar energy; Exergy; Friedrichshafen district heating system (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (20)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:74:y:2015:i:c:p:848-854

DOI: 10.1016/j.renene.2014.09.014

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