Computational Studies on Metal Foam and Heat Pipe Enhanced Latent Thermal Energy Storage

Nithyanandam, Karthik; Pitchumani, R.

doi:10.1115/1.4026040

Cited by 57 publications

(18 citation statements)

References 26 publications

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“…It is concluded that with fin-structure, energy efficiency is improved significantly. Nithyanandam and Pitchumani [71] conducted numerical analysis on LHSTES system with metal foam and embedded heat pipe. It is reported that the augmentation in heat transfer rate during charging decreased with pore-density of metal foam, due to the restriction in the formation of buoyancy-induced convection.…”

Section: Combined Heat Transfer Enhancement Techniquesmentioning

confidence: 99%

Experimental and Numerical Studies on Phase Change Materials

Wang¹,

Zhu²

2018

Phase Change Materials and Their Applications

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Phase change materials (PCMs) are attracting significant attentions in research and application, categorized into mainly three types, that is, organic (O), inorganic (IO) and eutectic (E). This section introduces the experimental and numerical investigations conducted in recent decades, mainly focused on the properties enhancement of PCMs and the performance improvement of its application in latent heat storage (LHS) units, as well as the evaluation and optimization of LHS units. It was concluded that lots of contribution have been made to PCMs and LHS units analysis. However, there is still some weakness in research, such as the lackness of detailed and systematic research on properties, the nonuniform standard on testing method as well as the contradictory conclusions. The most evaluation of LHS units is based on energy, instead of exergy, entropy and entransy. There is another issue that most of the research is based on numerical analysis, while less experimental research is conducted, especially in the case of LHS unit.

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Section: Combined Heat Transfer Enhancement Techniquesmentioning

confidence: 99%

Experimental and Numerical Studies on Phase Change Materials

Wang¹,

Zhu²

2018

Phase Change Materials and Their Applications

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“…However, a major technology barrier that is limiting the use of latent thermal energy of PCM is the higher thermal resistance provided by its intrinsically low thermal conductivity, thus requiring large heat transfer surface area of interaction. Several techniques to improve the thermal performance of latent thermal energy storage systems are reported in the literature; notable among them are embedding heat pipes or thermosyphons between the HTF and PCM [2][3][4][5], dispersing high conductivity particles in the PCM [6] and storing PCM within the framework of porous metal foams [7,8]. A review of various techniques employed to enhance the performance of high temperature latent thermal energy storage system is discussed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Optimization of an encapsulated phase change material thermal energy storage system

Nithyanandam

Pitchumani

2014

Solar Energy

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Thermal energy storage enables uninterrupted operation of a concentrating solar power (CSP) plant during periods of cloudy or intermittent solar availability. This paper presents a transient computational analysis of an encapsulated phase change material (EPCM) thermal energy storage (TES) system for repeated charging and discharging cycles to investigate its dynamic response. The influence of the design and operating parameters on the dynamic charge and discharge performance of the system is analyzed to identify operating windows that satisfy technoeconomic targets of storage cost less than $15/kWh t , round-trip exergetic efficiency greater than 95%, charge time less than 6 hours and a minimum discharge period of 6 hours. Overall, this study illustrates a methodology for design and optimization of encapsulated PCM thermal energy storage system (EPCM-TES) for a CSP plant operation.

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“…The second term models the presence of the solid part in the mixed region, where the small number (0.001) avoids the division by zero [15] when β is null. Amush is the mushy zone constant which represents the damping of the velocity to zero during the solidification [18].…”

Section: Physical Modelmentioning

confidence: 99%

“…where t is the time, μPCM is the viscosity of the PCM or Nano-PCM; p is the relative pressure and S is a source term vector that includes all of following terms [15]:…”

Section: Physical Modelmentioning

confidence: 99%

“…A numerical investigation on paraffin RT58 as PCM in metal foam is made in [14] using the local thermal non equilibrium model. A LTESS for concentrating solar power applications is numerically studied in [15] using the enthalpy-porosity method both charging and discharging process of the system for different geometrical configuration and metal foams. Experimentally Zhao et al [8] studied the phase change of the RT58 paraffin in a copper foam in order to evaluate the solid-liquid evolution of the material and the enhancement of heat transfer because of the metal foam.…”

Section: Introductionmentioning

confidence: 99%

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Thermal behaviors of latent thermal energy storage system with PCM and aluminum foam

Buonomo¹,

Ercole²,

Manca³

et al. 2016

IJHT

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A numerical investigation on LHTESS with PCM is accomplished. The PCM used is paraffin wax. To enhance the heat transfer inside the system a highly conductive material like metal foam and ceramic nanoparticles are used. The latter method of enhancement leads to a new class of material called Nano-PCM. The system under investigation is a typical 70 L water tank filled up with pure PCM or Nano-PCM and a certain number of pipes are located where the Heat Transfer Fluid (HTF) flows. The surfaces of the pipes are assumed at a constant temperature above the melting temperature of the PCM to simulate the heat transfer from the HTF. The enthalpy-porosity theory is employed to simulate the phase change of the PCM while the metal foam is modelled as a porous media that obeys to the Darcy-Forchheimer law. The ceramics nanoparticles are modelled with the single-phase model. The simulations are accomplished for chargingdischarging process at different porosities of the metal foam and different concentration of the nanoparticles. The results show that the presence of the metal foam improves the heat transfer in the system respect to the addition of the nanoparticles, reducing the melting time more than one order of magnitude.

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Computational Studies on Metal Foam and Heat Pipe Enhanced Latent Thermal Energy Storage

Cited by 57 publications

References 26 publications

Experimental and Numerical Studies on Phase Change Materials

Experimental and Numerical Studies on Phase Change Materials

Optimization of an encapsulated phase change material thermal energy storage system

Thermal behaviors of latent thermal energy storage system with PCM and aluminum foam

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