Numerical studies on the performance enhancement of an encapsulated thermal storage unit

Narasimhan, N. Lakshmi; Bharath, Ragunath; Ramji, Sarah Ann; Tarun, M.; Arumugam, A. Siddarth

doi:10.1016/j.ijthermalsci.2014.05.003

Cited by 21 publications

(10 citation statements)

References 36 publications

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“…Chrzan et al 9 discussed the properties of Ge-Au and Ge-Sn binary eutectic alloy nanostructures embedded with a SiO 2 formed matrix and concluded that such materials might find applications within the broad area of thermal storage and transport. Narasimhan et al 12 investigated numerically the performance of an encapsulated latent heat thermal storage unit containing a PCM dispersed with high-conductivity particles. Chaiyasat et al 11 proved the validity of the idea that the thermal properties strongly depend on the kind of polymer shell using uncross-linked microcapsules.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and performance study of cordierite/mullite composite ceramics for solar thermal energy storage

Zhang

et al. 2016

Int J Applied Ceramic Tech

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The employment of solar energy in recent years has reached a remarkable edge. It has become even more popular as the cost of fossil fuel continues to rise. Energy storage system improves an adjustability and marketability of solar thermal and allowing it to produce electricity in demand. This study attempted to prepare cordierite/mullite composite ceramics used as solar thermal storage material from calcined bauxite, talcum, soda feldspar, potassium feldspar, quartz, and mullite. The thermal physical performances were evaluated and characterized by XRD, SEM, EPMA, and EDS. It was found that the optimum sintering temperature was 1280°C for preparing, and the corresponding water adsorption was 11.25%, apparent porosity was 23.59%, bulk density was 2.10 mg·cm−3, bending strength was 88.52 MPa. The residual bending strength of specimen sintered at 1280°C after thermal shock of 30 times decreased to be 57 MPa that was 36% lower than that before. The thermal conductivity of samples sintered at 1280°C was tested to be 2.20 W·(m·K)−1 (26°C), and after wrapped a PCM (phase change materials) of K2SO4, the thermal storage density was 933 kJ·kg−1 with the temperature difference (ΔT) ranged in 0‐800°C. The prepared cordierite/mullite composite ceramic was proved to be a promising material for solar thermal energy storage.

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Section: Introductionmentioning

confidence: 99%

“…Chaiyasat et al 11 proved the validity of the idea that the thermal properties strongly depend on the kind of polymer shell using uncross-linked microcapsules. Narasimhan et al 12 investigated numerically the performance of an encapsulated latent heat thermal storage unit containing a PCM dispersed with high-conductivity particles.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance study of cordierite/mullite composite ceramics for solar thermal energy storage

Zhang

et al. 2016

Int J Applied Ceramic Tech

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“…As the PCM material properties were found to have the greatest effect on packed bed thermal performance, several other researchers focused on the effect of various thermal property enhancements on packed bed designs, including the effect of dispersing high conductivity particles within the PCM capsule [43]. This study developed a numerical model that assessed the impact of macroscale high thermal conductivity inclusions within the PCM on the energy charge and discharge rates.…”

Section: Packed Bed Designsmentioning

confidence: 99%

Energy Storage Applications

Fleischer

2015

Thermal Energy Storage Using Phase Change Materials

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As discussed in Chap. 1, energy storage through solid-liquid phase change is inherently a transient process and is best suited for systems that experience repeated transients, such as on-off or periodic peaking cycles, or for those systems which require thermal energy storage for later use. PCMs are commonly used in applications for both thermal management and for thermal energy storage.Interest in PCMs for thermal management of systems can be traced back at least through the 1970s. NASA in particular was interested in the use of PCMs as what were then referred to as "thermal capacitors" and PCMs were implemented in several moon vehicles and in Skylab [1]. The 1977 NASA tech brief "A Design Handbook for Phase Change Thermal Control and Energy Storage Devices" [2] was one of the first comprehensive PCM references, and is still widely cited and used today.During the 1970s and 1980s, interest was also building in the application of PCMs in solar systems [3-5] for thermal energy storage in both large solar plants, and in smaller domestic applications such as domestic hot water systems. The concept of embedding PCMs in various types of building materials, such as wallboard and floorboards, in order to create houses and offices with lower heating and cooling loads for greater energy efficiency, also began in the 1970s/80s [6,7]. Simultaneously, a significant amount of fundamental research was being completed on PCMs, considering in-depth the melting and solidification processes, and the roles of conduction and natural convection on the phase change processes [8][9][10][11].With the growth of computing power through the 1980s and 1990s, integrated circuits began dissipating significant amounts of heat and PCM applications in the thermal management of high performance, military and consumer electronics came on the scene in the late 1990s [12][13][14]. More recently, PCMs have seen application in textile design for energy absorbing clothing for military and consumer products [15].

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“…Presently, PCM-based passive cooling is gaining popularity due to their successful deployment in a wide variety of applications for thermal management and energy storage. 10 PCMs are chemicals that are capable of undergoing melting/solidification capable of absorbing/releasing its latent heat of fusion while exchanging heat from/to a hot source/cold sink. PCMs offer several advantages such as high thermal energy density, nearly uniform temperature of operation and so on.…”

Section: Introductionmentioning

confidence: 99%

Cooling of a lithium ion battery using phase change material with air/dielectric fluid media: A numerical study

Amalesh¹,

Narasimhan²

2019

Proceedings of the Institution of Mechanical Engineers, Part A:

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This paper proposes a method of cooling lithium ion (Li-ion) batteries using a phase change material RT35 in combination with air or a dielectric fluid media (STO 50). Three-dimensional numerical investigations have been carried out using Ansys Fluent to assess the cooling performance under different rates of discharging (1C, 2C, and 3C) of a 38120P Li-ion battery. Five different cases have been investigated and the relative benefits of the combined phase change material–air/dielectric liquid cooling compared over an air or dielectric cooling alone for the battery. Actual heat generation data available for the battery was made use of and supplied to the source term of the energy equation in the solver. A separate user-defined macro on the heat generation of the battery was developed by the authors for the purpose. The numerical simulation was validated comparing the present results with published experimental data for a bare adiabatic 38120P Li-ion cell. The results showed that the cooling was better with phase change material–air or phase change material–dielectric liquid combination compared to air or dielectric fluid alone, capable of reducing the cell temperature further by 6 ℃. From the study, employing phase change material in combination with a dielectric liquid has been suggested as a promising option for thermal management of Li-ion batteries at higher discharging rates to maintain the cell temperatures below 37 ℃.

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Numerical studies on the performance enhancement of an encapsulated thermal storage unit

Cited by 21 publications

References 36 publications

Preparation and performance study of cordierite/mullite composite ceramics for solar thermal energy storage

Preparation and performance study of cordierite/mullite composite ceramics for solar thermal energy storage

Energy Storage Applications

Cooling of a lithium ion battery using phase change material with air/dielectric fluid media: A numerical study

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