Carbon nanotube/paraffin/montmorillonite composite phase change material for thermal energy storage

Abstract

HighlightsOMMT/paraffin composite PCM were prepared.OMMT/paraffin/grafted MWNT composite phase change material.Paraffin is intercalated into the interlayer of OMMT.OMMT/paraffin/grafted MWNT has stable thermal properties.OMMT/paraffin/grafted MWNT has a better heat storage prosperity.

Investigation of charge and discharge regimes of nanomodified heat-accumulating materials

“…A number of researchers, relying on high thermophysical properties of carbon nanomaterials, have used in their works carbons nanotubes, [6,7], mixtures of carbon nanotubes and montmorillonite, [9] graphene [11,12]. Thermal conductivity of some carbon nanotubes can be above 3000 W/mK [16], and for diffident types of graphene it is in the range of 500 to 5000 W/mK [11].…”

“…Intercalation of paraffin into interlayer spaces of montmorillonite has led to the 38 % increase of thermal conductivity and provided thermal stability of the composition for 100 charge-discharge cycles [9]. As a result of combined use of montmorillonite and carbon nanotubes as modification components, the 73 % increase in thermal conductivity of the initial paraffin matrix has been achieved [9].…”

“…As a result of combined use of montmorillonite and carbon nanotubes as modification components, the 73 % increase in thermal conductivity of the initial paraffin matrix has been achieved [9].…”

“…The influence of nanotube diameter on thermophysical properties of paraffin has been experimentally demonstrated in the paper [8]. The authors of the paper [9] have proposed to use montmorillonite, which is a clay mineral from phyllosilicate group, as an additional component. The paper [10] studies the influence of graphite on thermophysical parameters of eutectic mixtures.…”

The additive technology for obtaining thermal storages based on nanomodified materials

“…Thus, it hinders their application and leads to a need to use the auxiliary bodies and heat-exchanging elements. There is number of studies, in which potential improvements of such materials with a phase transition are researched, as for example an improvement of paraffin by introducing carbon nanotubes and grapheme into it [4][5][6][7][8][9][10][11]. The primary objective, which is set by authors of this paper, is related to the improvement of thermophysical properties, especially heat conduction.…”