Fast and experimentally validated model of a latent thermal energy storage device for system level simulations

Waser, R.; Ghani, Faisal; Maranda, Simon; O’Donovan, Tadhg S.; Schuetz, Philipp; Zaglio, Maurizio; Worlitschek, Jörg

doi:10.1016/j.apenergy.2018.09.061

Cited by 32 publications

(14 citation statements)

References 27 publications

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“…The heat exchanger (4) calculates the heat transferred to the PCM from hot water which is heated by the heat pump, and defines the value of P in equation (1). The heat exchanger component follows the method as presented in [17]. The tube of the heat exchanger is considered to be spatially discretized into n parts or n+1 nodes.…”

Section: Case 1b: Lt-tes With Heat Pumpmentioning

confidence: 99%

“…(8) based on the definition of Nusselt number for which an empirical correlation for flow regimes in the transition zone between laminar and turbulence introduced by Gnielinski [36] is applied. The effective thermal conductivity values of the PCM heat exchanger compound for solid and liquid phase correspondingly are taken from [17] and are equal to , = 3.25 / and , = 8.75 / .…”

Section: Case 1b: Lt-tes With Heat Pumpmentioning

confidence: 99%

“…Although sensible heat storage is the most common method of thermal energy storage, latent heat storage systems that use Phase Change Materials (PCMs) offer a considerably higher energy density compared to water-based sensible heat storage systems and have the advantage of the isothermal nature of the storage process i.e storing heat compactly in a narrow temperature range [15,17]. The effect of using PCMs in solar thermal storage systems has been investigated extensively both in experimental and numerical studies [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic modeling and energy analysis of renewable heating and electricity systems at residential buildings using phase change material based heat storage technologies

Violidakis

Ατσόνιος

Iliadis

et al. 2020

Journal of Energy Storage

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Several heat storage systems for domestic application can be used to promote Renewable Energy Sources (RES) penetration by storing excess energy, which would otherwise be rejected during curtailments. The present study investigates two types of PV powered latent heat storage technologies for delivering heat and/or electricity at residential buildings and compares them against a reference case which uses a conventional heat pump as a heating system, also powered by a PV. One technology involves a low temperature PCM thermal energy storage system (LT-TES) heated by either an electric resistance or a heat pump and the other technology involves an ultra-high temperature TES (UHT-TES). It is revealed that any case with heat storage is preferable for better exploiting the produced renewable energy than the conventional one which does not include heat storage. The most favorable from this aspect are the cases which include the UHT-TES, which provide both heat and electricity. Focusing exclusively on heat supply, the most preferable case from a technical performance aspect is the one which includes a heat pump and a LT-TES system, albeit not providing any electricity. On the other hand, the most advantageous only in terms of electricity supply is the case which includes the UHT-TES system.

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Section: Case 1b: Lt-tes With Heat Pumpmentioning

confidence: 99%

Section: Case 1b: Lt-tes With Heat Pumpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic modeling and energy analysis of renewable heating and electricity systems at residential buildings using phase change material based heat storage technologies

Violidakis

Ατσόνιος

Iliadis

et al. 2020

Journal of Energy Storage

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“…Heat losses were not determined, probably due to their minor relevance in the examined temperature range up to 150 • C. Jansone et al [22] found limits of the T-history method when determining the specific heat capacity of PCMs in the mid-temperature range. Waser et al [23] developed a computational model for salt-hydrate based PCMs used in a low to medium temperature range. The model was validated experimentally and was found to be an important tool for properly designing subcomponents like heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

Simulative Investigation of Thermal Capacity Analysis Methods for Metallic Latent Thermal Energy Storage Systems

et al. 2021

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Latent heat storage systems are a promising technology for storing and providing thermal energy with low volume, mass and cost requirements, especially when operated at high temperatures. Metallic phase change materials are particularly advantageous for high thermal input and output, which is especially important for mobile applications. When designing a storage system, it is essential to have precise knowledge about the potential storage capacity. However, the system’s storage capacity is typically calculated from material properties determined at lab scale, although systemic boundary conditions can have a considerable influence. Systemic influences can result from thermal and reactive interfaces or from the storage design. In order to consider these influences, we propose three calorimetric procedures to thermally analyse high-temperature metallic latent energy storage systems at an application scale. We examined the procedures in a transient simulation environment, monitoring the storage capacity of the system. The procedure, based on adiabatic conditions, shows the least deviation from the simulation input parameters, but is limited to the heating process of the storage. Discharging the storage can be represented by isoperibolic conditions with controlled heat exchange. The precision of the procedures depends on the evaluation routine, the calibration routine, the heat extraction rate and the thermal inertia of the test bench.

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“…As their main advantage, latent storage systems can store heat compactly in a narrow temperature range, thereby allowing for an effective energy storage in various applications, including isothermal or nearly isothermal processes . Many studies have examined the potential of using PCMs in buildings .…”

Section: Introductionmentioning

confidence: 99%

Improving the performance of air conditioning systems by using phase change materials: A review

Omara

Abuelnour

2019

Int J Energy Res

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Summary This paper reviews the application of phase change materials (PCMs) for improving the performance of air conditioning systems. The different methods of integrating PCMs into air conditioning systems are presented. Moreover, the effects of PCM geometry, flow, and heat transfer characteristics on the performance of air conditioning systems and the potential use of PCMs in increasing the energy savings and coefficient of performance of air conditioning systems are also discussed. Recent studies on the thermodynamic (energy and exergy), economic, and environmental benefits of integrating PCMs into air conditioning systems are reviewed. Several methods for the preparation and optimal selection of PCMs are proposed to improve the performance of air conditioning systems, and then the challenges relating to PCM properties, optimal thickness, and PCM containers are highlighted. The economic aspects, humidity effect, life cycle assessment, and use of solid‐solid PCMs are cited as potentially important topics for future research.

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Fast and experimentally validated model of a latent thermal energy storage device for system level simulations

Cited by 32 publications

References 27 publications

Dynamic modeling and energy analysis of renewable heating and electricity systems at residential buildings using phase change material based heat storage technologies

Dynamic modeling and energy analysis of renewable heating and electricity systems at residential buildings using phase change material based heat storage technologies

Simulative Investigation of Thermal Capacity Analysis Methods for Metallic Latent Thermal Energy Storage Systems

Improving the performance of air conditioning systems by using phase change materials: A review

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