Sensitivity analysis for thermocline thermal storage tank design

Bonanos, Aristides M.; Votyakov, E. V.

doi:10.1016/j.renene.2016.07.052

Cited by 46 publications

(13 citation statements)

References 38 publications

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“…The response of the sizing and performance outputs of the system model to changes in the design parameters was studied by One-At-a-Time sensitivity analysis [30][31][32]. Sizing variables considered to investigate were volume, total effective length, and maximum heat extraction rate of the BTES as well as energy coverage rate of the HWST.…”

Section: Sizing and Performance Analysismentioning

confidence: 99%

Sizing and performance analyses of a combined heating and cooling system with the integration of short- and long-term storages

Shakerin

Eikeskog

et al. 2021

E3S Web Conf.

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Technological advancements in the utilization of renewable energy sources have unveiled potentials for increasing building energy efficiency. Integrating heat pump-based energy systems with thermal storages is a suitable option to meet the thermal requirements of modern buildings and exploiting the available renewable energy sources. However, how to size the main components of a heat pump-based energy system with the integration of short- and long-term storages is not yet well explored. Therefore, this study focused on the design and performance analyses of an integrated heating and cooling system consist of a heat pump, borehole long-term thermal storage, and hot water tank short-term thermal. Heat pump models were introduced as parametric models based on the producer data. The dynamic thermal model of the energy system was developed and analysed in MATLAB. Different combinations of heating and cooling loads were tested. Integration of cooling and heating systems was discussed through different operation strategies and challenges were addressed. The results of the parametric analysis identified the key parameters affecting the design of components and efficiency of the system. Moreover, the results showed that lower cooling to heating load ratio leads to an excessive reduction of the ground temperature and overall efficiency over the long-term operation.

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Section: Sizing and Performance Analysismentioning

confidence: 99%

Sizing and performance analyses of a combined heating and cooling system with the integration of short- and long-term storages

Shakerin

Eikeskog

et al. 2021

E3S Web Conf.

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“…These operating conditions are imposed by the processes that emit waste heat streams, and by those meant to receive the heat delivered during the discharging phase. Depending on the aim of the storage, its monitoring and performance will be different [11,[25][26][27][28]. The performance and industrial relevance of thermocline heat storage systems will mostly depend on the temperature thresholds (cut-off temperatures) during charge and discharge [11], which control the system's utilization factor.…”

Section: Introductionmentioning

confidence: 99%

Flexibility and robustness of a high-temperature air/ceramic thermocline heat storage pilot

Ferber

Falcoz

Minh

et al. 2019

Journal of Energy Storage

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A high-temperature air/ceramic thermocline packed-bed heat storage pilot was designed and built to measure the effects of operating parameters and quality of the heat resource on its performance, with a horizontal duct of square section. The influence of inlet air flow rate during the discharging phase and the impact of a degraded inlet heat resource during the charging phase were studied. The results revealed that the horizontal orientation of the bed didn't generate a thermal radial gradient. Results also show that the overall cycle efficiency is weakly affected by the changes in the operating conditions. Thermocline heat storage is surprisingly well-suited to managing resource instabilities. It forms a robust, flexible high temperature storage system applicable for industrial use to recover and deliver erratically produced waste heat.

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“…At CIEMAT simplified models for system simulations [9] and possible operation strategies [10] have been theoretically investigated. An analytic model developed at EEWRC has been used for the application of sensivity analysis for thermocline optimization [11].…”

Section: Introductionmentioning

confidence: 99%

Parametric study of the thermocline filler concept based on exergy

Odenthal

Klasing

Bauer

2018

Journal of Energy Storage

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In this work, an extensive parametric study of the molten salt thermocline storage concept with filler is presented. The parametric study is coupled with an optimization routine, allowing a better comparison, since it finds only those storage configurations, which can directly substitute the two-tank system in a given power plant. Results show that, compared to the two-tank molten salt system, the thermocline technology achieves high exergetic efficiency at only slightly increased storage volume size and a huge decrease in salt inventory. Subscripts e end eff effective f fluid in, out inlet / outlet position init initial value nom nominal s solid set set value th thermal vol volumetric wt weight

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Sensitivity analysis for thermocline thermal storage tank design

Cited by 46 publications

References 38 publications

Sizing and performance analyses of a combined heating and cooling system with the integration of short- and long-term storages

Sizing and performance analyses of a combined heating and cooling system with the integration of short- and long-term storages

Flexibility and robustness of a high-temperature air/ceramic thermocline heat storage pilot

Parametric study of the thermocline filler concept based on exergy

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