Temperature dependence of thermal conductivity of vegetable oils for use in concentrated solar power plants, measured by 3omega hot wire method

Hoffmann, Jean-François; Henry, J.F.; Vaïtilingom, Gilles; Olivès, Régis; Chirtoc, M.; Caron, D.; Py, Xavier

doi:10.1016/j.ijthermalsci.2016.04.002

Cited by 49 publications

(19 citation statements)

References 19 publications

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“…The details of method 3 ω can be obtained in the following literature [34]. 1and on the other hand on the primary properties.…”

Section: Vegetable Oilsmentioning

confidence: 99%

Temperature Dependence of Density, Viscosity, Thermal Conductivity and Heat Capacity of Vegetable Oils for Their Use as Biofuel in Internal Combustion Engines

Zongo¹,

Vaïtilingom²,

Daho³

et al. 2019

ACES

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This work gives tools to overcome the difficulty to determine experimentally physical properties for vegetable oils within the range of temperature typically observed during the injection phase in a diesel engine. Knowing vegetable oils' physical properties to these ranges of temperature is of fundamental importance when modeling their combustion in diesel engine. However, vegetable oils' experimental physical properties data are rare in the literature for temperature above 523 K. This paper describes experimental measurements and estimation methods for density, dynamic viscosity, thermal conductivity and heat capacity of vegetable oils for this particular range of temperature. The methodology uses several correlative methods using group contribution approach for each property and compares experimental data with predicted one to select the more accurate model. This work has shown the rapeseed and jatropha oils' physical properties can be satisfactorily predicted as a function of temperature using group contribution approach.

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“…The details of method 3 ω can be obtained in the following literature [34]. 1and on the other hand on the primary properties.…”

Section: Vegetable Oilsmentioning

confidence: 99%

Temperature Dependence of Density, Viscosity, Thermal Conductivity and Heat Capacity of Vegetable Oils for Their Use as Biofuel in Internal Combustion Engines

Zongo¹,

Vaïtilingom²,

Daho³

et al. 2019

ACES

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“…The approach obtained improved upon HP designs by maximizing the capillarity angle. Even though other fluids (e.g., vegetable oils, synthetic oil) are used frequently as HTFs for CSPs [25], in the present study only four commonly utilized fluids are considered for the design optimization of CSP systems: liquid sodium, water, and two molten salts [26]. From the compared techniques, BPSO achieved improvements in the wet front, via the capillarity angle, from around 11% against the study reported in [21].…”

Section: Introductionmentioning

confidence: 96%

Micro-Grooved Pipe Design of Parabolic Trough by Metaheuristic Optimization: An Empirical Comparison

2020

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Pipe design is one of the most significant research lines in the area of parabolic semi-cylindrical solar collectors. The main idea behind pipe design is to increase the capillarity angle by expanding the total area being heated, therefore boosting the work capacity of the device. Such capillarity depends on several factors, whose numerical calculations are highly complex. Moreover, some of those variables are integers, whereas some others are real; hence, it is necessary to use optimization techniques that are capable of searching in those numerical spaces. There are several optimization tools that allow individual codification as binary strings, granting the coding of integer, real, or any other, as part of the same individual. Consequently, in this paper we propose the comparison of four metaheuristics when they are utilized to maximize the capillarity angle of the pipe in a parabolic trough. Experimental results show a better performance of binary particle swarm optimization when compared against the other techniques, achieving improvements in the capillarity angle of on average 11 % in comparison with a similar study.

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“…The emergent concern to curtail the exploit of petroleum derivative mineral oil has led to the exploration for alternative eco-friendly lubricating agents as the mineral oil based lubricants have the lowest biodegradation rate, a high potential for bio-accumulation and toxicity to all organisms. The bio-lubricants degrade faster without bio-accumulation, however, they exhibits considerably high wear rate than mineral oils which limits their industrial applications [1][2][3][4][5][6][7][8][9][10]. In general, the bio-oils are vegetable fat which can be produced at industrial scale and are characterized by their fatty acid composition.…”

Section: Introductionmentioning

confidence: 99%

“…The amphiphilic nature of biolubricants may provide better lubricating characteristics in both boundary and hydrodynamic regimes [11]. The bio-oil having approximately similar quantity of fatty acids exhibit approximately similar thermo-physical characteristics unless they were refined [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation and Mechanism Analysis: Effect of Concentration and Temperature on the Viscosity of Novel MWCNT-Mustard Oil Nanofluid

Vignesh¹,

Vijayan²,

Selvakumar³

2020

J. Chil. Chem. Soc.

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The bio-oils as alternative lubricating fluid are potential solution for the automotive and industrial mechanical systems. The development of novel renewable and non-toxic bio-lubricants with better lubricating distinctiveness will strengthen the economy of farmers in the agricultural based countries. In the present study, different weight fractions of MWCNT-Mustard oil nanofluids are formulated and their possible effects on the dispersion stability and dynamic viscosity are experimentally investigated over the temperatures ranging from 40 to 100°C. It is observed that the dynamic viscosity and viscosity index of nanofluids were declined with temperature raise, while, it exponentially increased with the raise of MWCNT concentration. The maximum viscosity enhancement of 101.3% is achieved in comparison to the base fluid at 100ºC. Further, the dynamic viscosity of nanofluids is compared with different classical semi-empirical correlations, however, the remarkable conformities were observed from multilayer feed forward Perceptron (MLP) of artificial neural network (ANN).

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Temperature dependence of thermal conductivity of vegetable oils for use in concentrated solar power plants, measured by 3omega hot wire method

Cited by 49 publications

References 19 publications

Temperature Dependence of Density, Viscosity, Thermal Conductivity and Heat Capacity of Vegetable Oils for Their Use as Biofuel in Internal Combustion Engines

Temperature Dependence of Density, Viscosity, Thermal Conductivity and Heat Capacity of Vegetable Oils for Their Use as Biofuel in Internal Combustion Engines

Micro-Grooved Pipe Design of Parabolic Trough by Metaheuristic Optimization: An Empirical Comparison

Experimental Investigation and Mechanism Analysis: Effect of Concentration and Temperature on the Viscosity of Novel MWCNT-Mustard Oil Nanofluid

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