An effectiveness-NTU technique for characterising tube-in-tank phase change thermal energy storage systems

Tay, N.H.S.; Belusko, Martin; Bruno, Frank

doi:10.1016/j.apenergy.2011.09.039

Cited by 176 publications

(81 citation statements)

References 30 publications

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“…There are a number of possible phase change materials, these can involve a solid-solid transition as can occur in some polymer materials where chain alignment decreases as energy is stored; solid-liquid where the melting of a material constitutes energy storage and liquid-gas which often requires containment of the gas in a pressure vessel. A review of high temperature PCM suitable for CSP TES is given by Liu et al [22], further more detailed formulations relating to the behaviour of PCM TES are given in Tay et al [23] and Amin et al [24], which builds on the work done by Belusko et al [25].…”

Section: Thermal Energy Storagementioning

confidence: 99%

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Optimisation of Storage for Concentrated Solar Power Plants

et al. 2014

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The proliferation of non-scheduled generation from renewable electrical energy sources such concentrated solar power (CSP) presents a need for enabling scheduled generation by incorporating energy storage; either via directly coupled Thermal Energy Storage (TES) or Electrical Storage Systems (ESS) distributed within the electrical network or grid. The challenges for 100% renewable energy generation are: to minimise capitalisation cost and to maximise energy dispatch capacity. The aims of this review article are twofold: to review storage technologies and to survey the most appropriate optimisation techniques to determine optimal operation and size of storage of a system to operate in the Australian National Energy Market (NEM). Storage technologies are reviewed to establish indicative characterisations of energy density, conversion efficiency, charge/discharge rates and costings. A partitioning of optimisation techniques based on methods most appropriate for various time scales is performed: from "whole of year", seasonal, monthly, weekly and daily averaging to those best suited matching the NEM bid timing of five minute dispatch bidding, averaged on the half hour as the trading settlement spot price. Finally, a selection of the most promising research directions and methods to determine the optimal operation and sizing of storage for renewables in the grid is presented.

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Section: Thermal Energy Storagementioning

confidence: 99%

“…In Tay et al [23] the average effectiveness ∝ η transport .η thermal storage of a PCM thermal storage unit with phase change temperature T P CM is presented as follows:…”

Section: Thermal Energy Storagementioning

confidence: 99%

Optimisation of Storage for Concentrated Solar Power Plants

et al. 2014

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“…The thickness of the melted/solidified layer of the PCM along the length of the fibre is considered to be constant. The analysis of the thermal behaviour of hollow fibres in the LHTES unit has been based on the ε-NTU methodology (Tay et al, 2012) where the thermal performance characteristics of a heat exchanger are described by the equations…”

Section: Hollow Fibres Embedded In Phase Change Materialsmentioning

confidence: 99%

A PCM-water heat exchanger with polymeric hollow fibres for latent heat thermal energy storage: a parametric study of discharging stage

Hejčík¹,

Charvát²,

Klimeš³

et al. 2016

jtam

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The paper presents a theoretical parametric study into latent heat thermal energy storage (LHTES) employing polymeric hollow fibres embedded in a phase change material (PCM). The polymeric hollow fibres of five inner diameters between 0.5 mm and 1.5 mm are considered in the study. The effectiveness-NTU method is employed to calculate the thermal performance of a theoretical LHTES unit of the shell-and-tube design. The results indicate that the hollow fibres embedded in a PCM can mitigate the drawback of low thermal conductivity of phase change materials. For the same packing fraction, the total heat transfer rates between the heat transfer fluid and the PCM increase with the decreasing diameter of the hollow fibres. This increase in the heat transfer rate and thus the efficiency of the heat exchange to some extent compensate for the energy consumption of the pump that also increases with the decreasing fibre diameter.

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“…The regenerative efficiency indicator or the use factor of the amount of energy stored is one of the parameters most relevant to the design of regenerative heat exchangers (also known as regenerators), for instance [16,17]. Some papers [18,19] on efficiency describe simplified methods derived from detailed methods for calculating indicators from energy accumulation system design parameters.…”

Section: Introductionmentioning

confidence: 99%

Energy Efficiency Indicators for Assessing Construction Systems Storing Renewable Energy: Application to Phase Change Material-Bearing Façades

et al. 2015

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Assessing the performance or energy efficiency of a single construction element by itself is often a futile exercise. That is not the case, however, when an element is designed, among others, to improve building energy performance by harnessing renewable energy in a process that requires a source of external energy. Harnessing renewable energy is acquiring growing interest in Mediterranean climates as a strategy for reducing the energy consumed by buildings. When such reduction is oriented to lowering demand, the strategy consists in reducing the building's energy needs with the use of construction elements able to passively absorb, dissipate, or accumulate energy. When reduction is pursued through M&E services, renewable energy enhances building performance. The efficiency of construction systems that use renewable energy but require a supplementary power supply to operate can be assessed by likening these systems to regenerative heat OPEN ACCESSEnergies 2015, 8 8631 exchangers built into the building. The indicators needed for this purpose are particularly useful for designers, for they can be used to compare the efficiency or performance to deliver an optimal design for each building. This article proposes a series of indicators developed to that end and describes their application to façades bearing phase change materials (PCMs).

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An effectiveness-NTU technique for characterising tube-in-tank phase change thermal energy storage systems

Cited by 176 publications

References 30 publications

Optimisation of Storage for Concentrated Solar Power Plants

Optimisation of Storage for Concentrated Solar Power Plants

A PCM-water heat exchanger with polymeric hollow fibres for latent heat thermal energy storage: a parametric study of discharging stage

Energy Efficiency Indicators for Assessing Construction Systems Storing Renewable Energy: Application to Phase Change Material-Bearing Façades

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