Thermal Properties of Beeswax/CuO Nano Phase-change Material Used for Thermal Energy Storage

Putra, Nandy; Prawiro, Erwin; Amin, Muhammad

doi:10.14716/ijtech.v7i2.2976

Cited by 37 publications

(10 citation statements)

References 18 publications

(20 reference statements)

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“…So that the composition of the percentage of Al 2 O 3 will produce a greater thermal conductivity value as well. This result is also supported by research conducted by Septiadi et al, [14] in his research related to the characterization of H2O base fluid based thermal conductivity using three nanoparticles namely CuO, Al 2 O 3 and TiO 2 . The results of the research showed that the thermal conductivity value of Al 2 O 3 -Water nanofluid was greater than the value of thermal conductivity produced by a TiO 2 -water nanofluid.…”

Section: Wettability Testingsupporting

confidence: 79%

“…The measurement lasts for 90 seconds which consists of the initial process by heating and cooling the sensor 30 seconds each which then the sensor will calculate the heat balance between the heating and cooling processes. Measurements were made on the test tube with a fluid amount of ± 20 ml, where temperature conditioning measurements were carried out using Circulating Thermostatic Bath (CTB) [14].…”

Section: Thermal Conductivity Testingmentioning

confidence: 99%

“…Because of these problems, researchers began developing and conducting research on hybrid nanofluid. Hybrid nanofluids are new nanotechnology fluids synthesized by decomposing two different nanoparticles into conventional heat transfer fluids [13,14]. The purpose of incorporating hybrid nanoparticles in a base fluid is to improve the characteristics of the basic fluid heat transfer through a combination of thermo-physical properties of the nanomaterial [5].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of hybrid nanofluid with two-step method

et al. 2018

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Nanofluid is a liquid fluid mixture with a nanometer-sized solid particle potentially applied as a heat transfer fluid because it is capable of producing a thermal conductivity better than a base fluid. However, nanofluids have a weakness that is a high level of agglomeration as the resulting conductivity increases. Therefore, in this study, the synthesis of two nanoparticles into the base fluid called hybrid nanofluids. This study aims to determine the effect of nanoparticle composition on the highest thermal conductivity value with the lowest agglomeration value. This research was conducted by dispersing Al2O3-TiO2 nanoparticles in water with volume fraction of 0.1%, 0.3%, 0.5%, 0.7% in the composition of Al2O3-TiO2 ratio of 75%:25%, 50%:50%, 25%:75%. The synthesis was performed with a magnetic stirrer for 30 minutes. The tests were carried out in three types: thermal conductivity testing with KD2, visual agglomeration observation and absorbance measurements using UV-Vis, wettability testing with HSVC tools and Image applications. The test results showed that the ratio composition ratio of 75% Al2O3-25% TiO2 with a volume fraction of 0.7% resulted in an increase in optimum thermal conductivity with the best wettability and the longest agglomeration level.

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Section: Wettability Testingsupporting

confidence: 79%

Section: Thermal Conductivity Testingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of hybrid nanofluid with two-step method

et al. 2018

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“…Phase change materials (PCMs) are preferable to TES in terms of large enthalpy changes (Putra et al, 2016). These crucial changes occur during freezing and melting (phase changes).…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Stability and Enthalpy of Eutectic Alkali Metal Solar Salt Dispersed with MgO Nanoparticles

Aslfattahi¹,

Saidur²,

Sabri³

et al. 2019

IJTech

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In this study, nanocomposites containing a pre-defined mass ratio of solar salt (NaNO3-KNO3: 6040 wt.%) dispersed with magnesium oxide (MgO) nanoparticles with nominal sizes of 100 nm were prepared in solid and liquid states. The proposed amounts of sodium nitrate and potassium nitrate were added to certain amounts of ultrapure deionized (DI) water comprising a 5 wt.% concentration of MgO nanoparticles. Afterward, the prepared mixture was placed in a dry oven to mix in a liquid state to obtain well-dispersed nanocomposites. Scanning electronic microscopy (SEM) was conducted to evaluate the uniformity of synthesized, molten salt-based magnesium oxide-nanoparticles, revealing a uniform dispersion. Enthalpy and melting point measurements were performed using differential scanning calorimetry. The experimental results of solar salt-based MgO indicated decreases in melting point and enthalpy by 7% and 12.4%, respectively. The reduction of enthalpy indicated that, with the addition of magnesium oxide to solar salt, the final nanocomposite tends to have more exothermic reactions and enhanced thermal conductivity performance at the melting point. Lower melting points constitute one of the major concerns regarding molten salt-based nanofluids. MgO nanoparticles with a concentration of 5 wt.% have a melting point decreased by 7%. Mass loss and thermal stability measurements were conducted using thermogravimetric analysis (TGA). The experimentally acquired results revealed an increment of decomposition temperature from 734.29°C to 750.73°C, demonstrating the enhancement of thermal stability at high temperatures.

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“…In order to increase its themal conductivity, some researcher are adding nanoparticles into PCM [4,5]. The addition of nanoparticles can rise the rate of process in absorption and distribution of heat [6]. Unfortunatly, it can reduce the latent heat [7].…”

Section: Introductionmentioning

confidence: 99%

New method of thermal cycling stability test of phase change material

et al. 2017

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Abstract. Phase Change Material (PCM) is the most promising material as thermal energy storage nowadays. As thermal energy storage, examination on endurance of material for long-term use is necessary to be carried out. Therefore, thermal cycling test is performed to ensure thermal stability of PCM. This study have found a new method on thermal cycling test of PCM sample by using thermoelectric as heating and cooling element. RT 22 HC was used as PCM sample on this thermal cycling test. The new method had many advantages compared to some references of the same test. It just needed a small container for PCM sample. The thermoelectric could release heat to PCM sample and absorb heat from PCM sample uniformly, respectively, was called as heating and cooling process. Hence, thermoelectric had to be supported by a relay control device to change its polarity so it could heat and cool PCM sample alternately and automatically. On the other hand, the thermoelectric was cheap, easy to be found and available in markets. It can be concluded that new method of thermal cycling test by using thermoelectric as source of heating and cooling can be a new reference for performing thermal cycling test on PCM.

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Thermal Properties of Beeswax/CuO Nano Phase-change Material Used for Thermal Energy Storage

Cited by 37 publications

References 18 publications

Synthesis of hybrid nanofluid with two-step method

Synthesis of hybrid nanofluid with two-step method

Experimental Investigation of Thermal Stability and Enthalpy of Eutectic Alkali Metal Solar Salt Dispersed with MgO Nanoparticles

New method of thermal cycling stability test of phase change material

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