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Preparation and characterization of stearic acid/expanded graphite composites as thermal energy storage materials

Fang, Guiyin; Li, Hui; Chen, Zhi; Liu, Xu - In: Energy 35 (2010) 12, pp. 4622-4626

Stearic acid/expanded graphite composites with different mass ratios were prepared by absorbing liquid stearic acid …, crystalline phase, microstructure and thermal diffusivity of the composites, respectively. The thermal properties and thermal … approximately the same as the values calculated based on the weight fraction of the stearic acid in the composites. The …

Persistent link: https://www.econbiz.de/10010808523

Design of composite tidal turbine blades

Grogan, D.M.; Leen, S.B.; Kennedy, C.R.; Ó Brádaigh, C.M. - In: Renewable Energy 57 (2013) C, pp. 151-162

Tidal turbine blades are subjected to significant thrust and torsional loadings due to the high density of the seawater in which they operate. These thrust loadings lead to high bending moments at the blade root, which can prove to be a serious design constraint for these devices and can have...

Persistent link: https://www.econbiz.de/10011044383

Homogenisation with application to layered materials

Patrício, M.; Mattheij, R.; de With, G. - In: Mathematics and Computers in Simulation (MATCOM) 79 (2008) 3, pp. 288-305

In this paper we are concerned with the elliptic PDEs with highly oscillating coefficients which model the behaviour of composite linear elastic materials. Analytical expressions for the effective coefficients are obtained for the case of layered materials using the theory of homogenisation....

Persistent link: https://www.econbiz.de/10011050490

Study of damage and repair of blades of a 300kW wind turbine

Marín, J.C.; Barroso, A.; París, F.; Cañas, J. - In: Energy 33 (2008) 7, pp. 1068-1083

The inspection of damages detected in some blades of 300kW wind turbines revealed that the nature of these damages was probably due to a fatigue mechanism. The causes that had originated the failure (superficial cracks, geometric concentrator, abrupt change of thickness) have been studied,...

Persistent link: https://www.econbiz.de/10011052959

Preparation and properties of highly conductive palmitic acid/graphene oxide composites as thermal energy storage materials

Mehrali, Mohammad; Latibari, Sara Tahan; Mehrali, Mehdi; … - In: Energy 58 (2013) C, pp. 628-634

crystalloid phase of palmitic acid/GO composites, respectively. DSC (Differential scanning calorimeter) test was done to … prepared form-stable composites as highly conductive PCMs for thermal energy storage applications. …

Persistent link: https://www.econbiz.de/10011053239

Preparation and properties of shape-stabilized phase change materials based on fatty acid eutectics and cellulose composites for thermal energy storage

Cao, Lei; Tang, Yaojie; Fang, Guiyin - In: Energy 80 (2015) C, pp. 98-103

Shape-stabilized fatty acid eutectics/carboxy methyl cellulose-1 composites as phase change materials (PCMs) were … composites melt at 32.2 °C with latent heat of 114.6 kJ/kg and solidify at 29.2 °C with latent heat of 106.8 kJ/kg. The thermal … cycling test proves that the composites have good thermal reliability. It is envisioned that the prepared shape …

Persistent link: https://www.econbiz.de/10011190869

Percolation conduction in vapour grown carbon fibre

Andrade, J.S.; Auto, A.M.; Kobayashi, Y.; Shibusa, Y.; … - In: Physica A: Statistical Mechanics and its Applications 248 (1998) 3, pp. 227-234

We investigate the conductivity variation with density of compacted vapour-grown carbon fibre (VGCF). The results indicate a typical transition between a non-linear domain at low compaction conditions and a regime where the conductivity increases roughly linearly with density when the sample is...

Persistent link: https://www.econbiz.de/10010587170

Nonlinear optics of fractal nanomaterials: Small-particle composites and self-affine thin films

Shalaev, Vladimir M.; Poliakov, E.Y.; Markel, V.A.; … - In: Physica A: Statistical Mechanics and its Applications 241 (1997) 1, pp. 249-258

Fractal nanostructured materials, such as nanocomposites and self-affine thin films, are shown to possess giant optical nonlinearities. The enhancement results from the sub-wavelength localization of dipolar modes and strong local field fluctuations.

Persistent link: https://www.econbiz.de/10010587380

Static and dynamic electrical breakdown in conducting filled-polymers

Lamaignère, L.; Carmona, F.; Sornette, D. - In: Physica A: Statistical Mechanics and its Applications 241 (1997) 1, pp. 328-333

The electrical resistance of a percolating medium made of a polymer filled with conductive particles may undergo a steep increase over a narrow temperature range above room temperature. A likely mechanism for the effect is the loss of interparticle contact inducing a weakening of the...

Persistent link: https://www.econbiz.de/10010587605

Crack formation in composites through a spring model

Sadhukhan, Supti; Dutta, Tapati; Tarafdar, Sujata - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 4, pp. 731-740

When two or more different materials are combined to form composites, the property of the composite may be quite …. We study crack formation in composites through a very general spring network model on a square lattice. The spring model …

Persistent link: https://www.econbiz.de/10010590465