Temperature dependency of thermal conductivity of solid phases for fatty acids

Bayram, Ümit; Aksöz, Sezen; Maraşlı, Necmetti̇n

doi:10.1007/s10973-014-3968-z

Cited by 27 publications

(6 citation statements)

References 39 publications

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“…The results of our study show that the thermal conductivity of stearic acid is higher than lauric acid, in agreement with the close relationship between the number of C and H atoms with thermal conductivity data of saturated fatty acid ethyl ester [64]. We note that the solid thermal conductivity data of fatty acid also shows a similar relationship, although there is no explicit explanation for that [73]. Besides that, the thermal conductivity of stearic acid does not resemble those of oleic acid with the same C number.…”

Section: Set Value Heater Offsupporting

confidence: 86%

Temperature-Dependent Thermal Conductivity Measurement System for Various Heat Transfer Fluids

Anggraini¹,

Silalahi²,

Sutjahja³

et al. 2021

I2M

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Accurate measurement of the thermal conductivity of a heat transfer fluid (HTF) is important for optimizing the performance of a thermal energy storage system. Herein, we develop a system to measure the thermal conductivity of an HTF during temperature variation, and the system was checked to measure several samples comprising water, lauric acid, stearic acid, oleic acid, and coconut oil. The thermal conductivity was measured using a KS-1 sensor of a KD2 Pro analyzer. In the study, a static heat conducting medium was used to control the temperature of the fluid, instead of the commonly used flowing water bath. The measured thermal conductivities of water (298 to 318 K) and lauric acid (323 to 373 K), stearic acid (358 to 372 K), oleic acid (334 to 372 K), and coconut oil (298 to 363 K) were compared to data from previous studies and fitted to available models. The accuracy of the data is further analyzed by relating the number of C and H atoms in the fatty acid, and the fatty acid content in coconut oil.

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Section: Set Value Heater Offsupporting

confidence: 86%

Temperature-Dependent Thermal Conductivity Measurement System for Various Heat Transfer Fluids

Anggraini¹,

Silalahi²,

Sutjahja³

et al. 2021

I2M

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“…Liquid state k = 0.2185-0.0008 T f (70ᵒ to 148ᵒC) [24] (32) Density of stearic acid was calculated by the following equation concluding that both the solid and liquid states with temperature varied from 20 to 110ᵒC [25]:…”

Section: Thermal Properties Of Selected Materials  Heat Transfer Fluid (Water)mentioning

confidence: 99%

Thermal performance of (organic and inorganic) multi PCM Encapsulated systems

Naife¹,

Hussien²,

Faraj³

2021

JUSST

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The storing of energy is the imprisonment of energy at one time to use the similar for another time. This review paper treats with the approaches of thermal energy storage and its implementations in the neighborhood of solar water heating schemes in addition to scheme of solar air heating and the materials utilized to preserve that thermal energy efficiently. This paper delivers the theoretical information of appropriate and unwanted features of various phase change materials PCMs. The paper includes several approaches of thermal energy storage as, latent heat storage, sensible heat storage and thermo-chemical energy storage, concentrating mostly on (PCMs) as an arrangement of appropriate solution for usage of energy to fill the hole amid deliver and request to develop the effectiveness of energy of a scheme. Theoretical details have been shown in the paper. The numerical results show the temperature contour increases when the time of charging process increases, and the temperature contour decreases when the time of discharging process increases.

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“…A finite difference model was used to fit the experimental data for a typical PCM obtained using the prototype system. As the first step in validation, pure myristic acid was chosen as a reference material since it has been extensively studied before [12,[28][29][30][31][32][33] …”

Section: Furthermore Sample Penetration Is Very Limited Which May Resmentioning

confidence: 99%

Performance comparison of three models for thermal property determination from experimental phase change data

Badenhorst

2015

Thermochimica Acta

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The characterization of thermal properties continues to be a challenge facing the development of composite phase change materials. To overcome the practical issues of current techniques a new experimental method was developed. The system is modelled using two fundamental models and a simplified analytical representation.Pure myristic acid is used for validation and a performance comparison based on time, accuracy and stability. All three approaches perform comparatively well in terms of accuracy with an average prediction error of less than one third of a degree and all thermal properties in line with expectations. The enthalpy model is susceptible to instability while the effective heat capacity method does not show any such behaviour. In addition, due to the choice of a smooth function for the transition from liquid to solid, this method delivers more realistic behaviour. The effective heat capacity method is faster than the enthalpy method by a factor of three, but the analytical approach is the fastest. However for a more robust and comprehensive representation the effective heat capacity method is preferred.

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Temperature dependency of thermal conductivity of solid phases for fatty acids

Cited by 27 publications

References 39 publications

Temperature-Dependent Thermal Conductivity Measurement System for Various Heat Transfer Fluids

Temperature-Dependent Thermal Conductivity Measurement System for Various Heat Transfer Fluids

Thermal performance of (organic and inorganic) multi PCM Encapsulated systems

Performance comparison of three models for thermal property determination from experimental phase change data

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