The role of vegetable oil in water based phase change materials for medium temperature refrigeration

Rasta, I Made; Suamir, I Nyoman

doi:10.1016/j.est.2017.12.014

Cited by 37 publications

(18 citation statements)

References 66 publications

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“…This could lead to new studies with water-based oils to increase its enthalpy and provide more thermal stability. In this way, the studies carried out by Rasta and Suamir [35] where water-based corn and soybean oils obtained 3 or 5 times higher enthalpy of phase change than the original PCM investigated. Nonetheless, their application works at a temperature between −1 • C and 5 • C. Since the PCM of AA-100M can be used in temperatures between −25 • C to 14 • C and according to the simulations manages to maintain a −13 • C environment for at least 7 h. Its applications have great potential in the transportation of frozen products, pre-cooked food, blood plasma, bovine and horse semen that use PCMs that works in −21 • C, and pig semen and medicines that needs a temperature near −3 • C [23]…”

Section: Simulation Resultsmentioning

confidence: 98%

Characterization of Unripe and Mature Avocado Seed Oil in Different Proportions as Phase Change Materials and Simulation of Their Cooling Storage

2020

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Environmental problems have been associated with energy consumption and waste management. A solution is the development of renewable materials such as organic phase change materials. Characterization of new materials allows knowing their applications and simulations provide an idea of how they can developed. Consequently, this research is focused on the thermal and chemical characterization of five different avocado seed oils depending on the maturity stage of the seed: 100% unripe, 25% mature-75% unripe, 50% mature-50% unripe, 75% mature-25% unripe, and 100% mature. The characterization was performed by differential scanning calorimetry, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The best oil for natural environments corresponded to 100% matured seed with an enthalpy of fusion of 52.93 J·g−1, and a degradation temperature between 241–545 °C. In addition, the FTIR analysis shows that unripe seed oil seems to contain more lipids than a mature one. Furthermore, a simulation with an isothermal box was conducted with the characterized oil with an initial temperature of −14 °C for the isothermal box, −27 °C for the PCM box, and an ambient temperature of 25 °C. The results show that without the PCM the temperature can reach −8 °C and with it is −12 °C after 7 h, proving its application as a cold thermal energy system.

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Section: Simulation Resultsmentioning

confidence: 98%

Characterization of Unripe and Mature Avocado Seed Oil in Different Proportions as Phase Change Materials and Simulation of Their Cooling Storage

2020

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“…The solutions were prepared at different concentrations (% volume) of corn-oil ester in water, namely: 15%, 20% and 25%. Other concentrations such as 5%, 7.5%, and 10% have also been investigated for medium temperature refrigeration applications [29] but they are not included in this paper. For testing purposes, volume of each PCM sample was prepared for 10 ml and inserted in a glass tube.…”

Section: B Preparation Of Corn-oil Ester In Water Eutectic Mixture Amentioning

confidence: 99%

“…In this research, phase change temperatures and degree of supercooling of the PCM candidates were tested by using T-history method which is considered more suitable for this application. Detailed method and equipment used for the T-history measurement have been published and reported in [29].…”

Section: Dsc and T-history Thermal Analysesmentioning

confidence: 99%

Development of Corn-Oil Ester and Water Mixture Phase Change Materials for Low Temperature Refrigeration Applications

Rasta¹,

Suamir²

2018

Proceedings of the International Conference on Science and Technology (ICST 2018)

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This study focuses on development of corn-oil ester and tap water mixtures as novel solid-liquid phase change material (PCM) candidates for low temperature refrigeration applications with product temperature between -20 °C and -10 °C. Thermal properties of both tap water and its mixture with corn-oil ester were tested by DSC and T-history methods. The test results showed that freezing and melting temperatures of tap water were 0 °C and phase transition temperatures of the mixtures were lower than those of individual tap water. The results indicated that corn-oil ester in the mixtures as a nucleate agent was able to lower the freezing point and to trigger ice nucleation in tap water which could diminish its super-cooling. The PCM candidates were found to have excellent thermal properties that could fulfill requirements of latent heat thermal energy storage systems used for low temperature refrigeration applications. Keywords-corn-oil ester, phase change materials, thermal energy storage, low temperature refrigeration.

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“…This experiment employed technique to reduce the temperature of the condenser surface during the refrigeration cycle and consequently improve the coefficient of performance (COP) [8]. Rasta et al [9] have been able to develop a water based phase change material for cold thermal energy storage that constitutes mixtures of water with small amount vegetable oil addition. An addition of 5% to 10% in water solution could decrease the freezing temperature from 0°C down to respectively -3.5°C to -6.5°C.…”

Section: Introductionmentioning

confidence: 99%

Effect of Phase Change Material Eutectic Plates on the Electric Consumption of a Designed Refrigeration System

Djeffal¹,

Bekkouche²,

Samai³

et al. 2020

I2M

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The main objective of this research is to design an improved refrigeration system incorporating a phase change material; experimental measurements have been carried out to reduce energy consumption. The adopted method was based on the comparison of two cases: the first corresponded to a classical cell and the second concerned an isolated experimental cell with phase change material (PCM) eutectic plates. An energy saving of up to 12.88% has been recorded. In the event of leaks, the operation will subsequently generate an over-consumption which was estimated at 22.03% compared to the initial consumption and 42.16% for a cell combined with eutectic plates. An incorrect choice of the thermostat temperature leads to unnecessary and expensive energy consumption. These materials have helped us to limit and sometimes almost avoid the stratification of temperature; on average, the temperature stratification was 0.68°C per 23 cm. A better air circulation from the evaporator can be promoted with a correct food distribution; it is possible, therefore, to reduce significantly the over-consumption due to cooling/freezing of the food. For a programmable thermostat (-10°C), a light over-consumption that can reach only 1.69% for bread and about 0.40% for water has been achieved.

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The role of vegetable oil in water based phase change materials for medium temperature refrigeration

Cited by 37 publications

References 66 publications

Characterization of Unripe and Mature Avocado Seed Oil in Different Proportions as Phase Change Materials and Simulation of Their Cooling Storage

Characterization of Unripe and Mature Avocado Seed Oil in Different Proportions as Phase Change Materials and Simulation of Their Cooling Storage

Development of Corn-Oil Ester and Water Mixture Phase Change Materials for Low Temperature Refrigeration Applications

Effect of Phase Change Material Eutectic Plates on the Electric Consumption of a Designed Refrigeration System

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