Dynamic heat transfer analysis on hwangtoh with PCM/eco-material for improving thermal inertia

Seunghwan Wi, Sungwoong Yang, Jongki Lee, Beom Yeol Yun, Ji Hun Park, Sumin Kim

Research output: Contribution to journalConference article

Abstract

The use of a latent-heat storage composite system for which phase-change materials (PCMs) are used is an effective way of storing thermal energy, and it has the advantages of a high energy-storage density and the isothermal nature of the storage process. Therefore, latent heat storage is considered to be the most effective way to use PCM to charge or discharge thermal energy as latent heat during the phase change period. However, the application of PCMs is difficult in a variety of fields due to their phase instability in the liquid state, and PCMs therefore need shape stabilization. To solve this problem, some investigators have studied the possibility of using a container that can prevent the leaking of liquid from PCMs by using a shape-stabilized PCM (SSPCM), a microencapsulated PCM (MPCM), or incorporated PCM techniques. The SSPCM was prepared by eco-material which are perlite and vermiculite. The selected PCM was n-octadecane, belongs to organic PCM. The thermal properties of the PCM, such as their melting and freezing temperatures and latent heat capacities, were measured using differential scanning calorimetry. The melting and freezing temperatures were measured by drawing a line at the point of maximum slope of the leading edge of the peak, and extrapolating to the base line. The latent heat capacities of the PCM were determined by numerical integration of the area under the peaks that represent the solid-solid and solid-liquid phase transitions. The thermal conductivities of the PCM and hwangtoh composite panels were measured by TCi thermal conductivity analyzer. The TCi developed by C-Therm Technologies Ltd. is a device for conveniently measuring the thermal conductivity of a small sample, by using the Modified Transient Plane Source (MTPS) method.

Original languageEnglish
Article number062019
JournalIOP Conference Series: Materials Science and Engineering
Volume609
Issue number6
DOIs
Publication statusPublished - 2019 Oct 23
Event10th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings, IAQVEC 2019 - Bari, Italy
Duration: 2019 Sep 52019 Sep 7

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Phase change materials
Heat transfer
Latent heat
Thermal conductivity
Heat storage
Thermal energy
Freezing
Hot Temperature
Specific heat
Liquids
Melting
Pulse code modulation
Energy storage
Containers
Large scale systems
Differential scanning calorimetry
Thermodynamic properties
Stabilization

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Cite this

Wi, Seunghwan ; Yang, Sungwoong ; Lee, Jongki ; Yun, Beom Yeol ; Park, Ji Hun ; Kim, Sumin. / Dynamic heat transfer analysis on hwangtoh with PCM/eco-material for improving thermal inertia. In: IOP Conference Series: Materials Science and Engineering. 2019 ; Vol. 609, No. 6.
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abstract = "The use of a latent-heat storage composite system for which phase-change materials (PCMs) are used is an effective way of storing thermal energy, and it has the advantages of a high energy-storage density and the isothermal nature of the storage process. Therefore, latent heat storage is considered to be the most effective way to use PCM to charge or discharge thermal energy as latent heat during the phase change period. However, the application of PCMs is difficult in a variety of fields due to their phase instability in the liquid state, and PCMs therefore need shape stabilization. To solve this problem, some investigators have studied the possibility of using a container that can prevent the leaking of liquid from PCMs by using a shape-stabilized PCM (SSPCM), a microencapsulated PCM (MPCM), or incorporated PCM techniques. The SSPCM was prepared by eco-material which are perlite and vermiculite. The selected PCM was n-octadecane, belongs to organic PCM. The thermal properties of the PCM, such as their melting and freezing temperatures and latent heat capacities, were measured using differential scanning calorimetry. The melting and freezing temperatures were measured by drawing a line at the point of maximum slope of the leading edge of the peak, and extrapolating to the base line. The latent heat capacities of the PCM were determined by numerical integration of the area under the peaks that represent the solid-solid and solid-liquid phase transitions. The thermal conductivities of the PCM and hwangtoh composite panels were measured by TCi thermal conductivity analyzer. The TCi developed by C-Therm Technologies Ltd. is a device for conveniently measuring the thermal conductivity of a small sample, by using the Modified Transient Plane Source (MTPS) method.",
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Dynamic heat transfer analysis on hwangtoh with PCM/eco-material for improving thermal inertia. / Wi, Seunghwan; Yang, Sungwoong; Lee, Jongki; Yun, Beom Yeol; Park, Ji Hun; Kim, Sumin.

In: IOP Conference Series: Materials Science and Engineering, Vol. 609, No. 6, 062019, 23.10.2019.

Research output: Contribution to journalConference article

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