Abstract
An analysis of argon gas flow in exemplary configuration of layered bed thermal energy storage is presented. The analysis incorporates URANS model with conjugate heat transfer between gas and solid storage core. The aim of this analysis was to identify key factors limiting exergy efficiency of this storage type and determine some details about storage transient behaviour. Three full cycles of storage loading and unloading having 17 hours physical time in total are simulated, with calculation of exergetic efficiency for each of the cycles. Conclusions regarding this storage type feasibility for indirect power storage in pumped heat systems are made.
Highlights
Introduction and motivationThis work refers to article provided by authors [1] and awaiting publication.Many energy markets experience rapid increase in renewable energy sources share, motivated by need to reduce CO2 emissions and related climate changes [2]
Modern EES methods are seen as solution to face this problem
EES based on indirect storage of energy in the form of heat (Thermal Energy Storage – TES), offers economically favorable investment costs with relatively high energy density, especially comparing to batteries, considered as potential best solution for modern ES approaches [4]
Summary
This work refers to article provided by authors [1] and awaiting publication. Many energy markets experience rapid increase in renewable energy sources share, motivated by need to reduce CO2 emissions and related climate changes [2]. EES based on indirect storage of energy in the form of heat (Thermal Energy Storage – TES), offers economically favorable investment costs with relatively high energy density, especially comparing to batteries, considered as potential best solution for modern ES approaches [4]. G.F Frate et al proved that PHES is promising ES technology and founded that the main approach to boost PHES performance is thermal integration They achieved best round-trip efficiency results for working fluid R1233zd at 110°C, but for large industry scale applications it is crucial to prove economical reasonable gas [6]. Most of performed work on PHES take advantage of expensive working fluid like ORC, ammonia or refrigerants It involves high costs of their purchase and further recycling or disposal. This paper concerns the CFD calculation of fluid and heat flow in fixed bed heat storage reservoir with argon as working fluid
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