Geometry optimization of a latent heat thermal energy storage unit using RT27

Shen, Jinqiu; Neveu, Pierre; Shu, Shuiming; Falcoz, Quentin

doi:10.2991/emcpe-16.2016.66

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Furthermore, the presence of a gas layer helps alleviate the problems associated with thermal expansion during melting/solidification. Besides exploiting convective flow, further enhancement can be achieved by using appropriate container geometries on ground [27,28] and in reduced gravity environments [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Preliminary Design of a Space Habitat Thermally Controlled Using Phase Change Materials

Kachalov

Sánchez

Martínez

et al. 2023

Thermo

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We explore the preliminary design of a space habitat thermally controlled using phase change materials (PCMs). The PCM is used to maintain a suitable, habitable temperature inside the habitat by isolating it from the external solar radiation. The system is studied numerically considering only diffusive heat transport (conduction), a scenario with practical application to microgravity or reduced gravity environments. The system dynamics are explored for a wide range of governing parameters, including the length of the PCM cell L, the thermo-optical properties—absorptivity α and emissivity ε—at the external boundary of the habitat wall exposed to solar radiation, the eclipse (illumination) fraction τe (τi) of the solar cycle, and the PCM used. We find that the thermo-optical properties at the external radiated boundary, characterized by the absorptivity–emissivity ratio (α/ε), play a key role in the system response and largely define the optimal design of the habitat. This optimum balances the heat absorbed and released by the PCM during repeated illumination and eclipse cycles.

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Section: Introductionmentioning

confidence: 99%

Preliminary Design of a Space Habitat Thermally Controlled Using Phase Change Materials

Kachalov

Sánchez

Martínez

et al. 2023

Thermo

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A numerical study on processes of charge and discharge of latent heat energy storage system using RT27 paraffin wax for exhaust waste heat recovery in a SI engine

Gürbüz

Ateş

2020

International Journal of Automotive Science and Technology

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In the present paper, the numerical analyses of the heat charge and discharge processes of the latent heat energy storage (LHTES) system designed for the recovery of the exhaust waste heat energy of the SI engine presented. In the LHTES system as phase change material (PCM), the charge and discharge ability of paraffin wax commercially identified with code RT27 were analyzed depending on time. Two closed-loop fluid circulation system consisting of two heat exchangers (HESs) was designed, someone connected to the exhaust path of SI engine for waste heat recovery, and the other used for the charging and discharging of waste heat energy in the PCM. To transfer the waste heat from the hot exhaust gases to the PC, cold water was used as the heat carrier fluid. In the numerical analysis, the exhaust gas temperature and flow rate values of a single-cylinder, air-cooled having a stroke volume of 476.5 cm3 SI engine operated with gasoline at 1600 rpm engine speed and 1/2 throttle position were used. As a result, at designed LHTES system and numerical analysis performed for RT27 paraffin wax under boundary conditions, the process of heat charge (melting) completed at 8000.sec with 93% liquid-fraction, while the process of heat discharge (solidification) completed at 55000.sec with 15% liquid-fraction.

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Geometry optimization of a latent heat thermal energy storage unit using RT27

Cited by 2 publications

References 6 publications

Preliminary Design of a Space Habitat Thermally Controlled Using Phase Change Materials

Preliminary Design of a Space Habitat Thermally Controlled Using Phase Change Materials

A numerical study on processes of charge and discharge of latent heat energy storage system using RT27 paraffin wax for exhaust waste heat recovery in a SI engine

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