Theoretic Prediction of Melting Temperature and Latent Heat for a Fatty Acid Eutectic Mixture

2011 ◽  
Vol 56 (6) ◽  
pp. 2889-2891 ◽  
Author(s):  
Yuan Yanping ◽  
Tao Wenquan ◽  
Cao Xiaoling ◽  
Bai Li
Keyword(s):  
Fatty Acid ◽  
Melting Temperature ◽  
Latent Heat ◽  
Eutectic Mixture ◽  
Fatty Acid Eutectic

Thermal Properties Analysis of Several N-Alkanes Eutectic Mixtures Applied in Building Envelopes

2012 ◽  
Vol 512-515 ◽  
pp. 3007-3010
Author(s):  
Jing Yu Huang ◽  
Shi Lei Lv ◽  
Chen Xi Zhang ◽  
Zhi Wei Wang
Keyword(s):  
Thermal Properties ◽  
Melting Temperature ◽  
Latent Heat ◽  
Heat Storage ◽  
Eutectic Mixture ◽  
Scanning Calorimetry ◽  
Latent Heat Storage ◽  
Building Envelopes ◽  
Eutectic Mixtures ◽  
Change Material

This study focuses on the preparation, thermal properties of alkanes eutectic mixtures (n-Octadecane/n-Eicosane, n-Octadecane/n-Docosane and n-Heptadecane /n-Eicosane) as candidate phase change material (PCM) for low temperature latent heat storage systems in building envelopes. Their melting temperature and latent heat were tested by Differential scanning calorimetry (DSC). The testing values were closed to calculation values of accepted theory that ensured the reliability of those datas. The results indicated n-Octadecane/n-Docosane eutectic mixture was more promising PCM for buildings in terms of melting temperature (25.3°C) and latent heat values of melting (158.2J/g).

Research on the Thermo Physical Properties of Lauric Acid-Capric Acid Binary Mixture Phase Change Materials

2012 ◽  
Vol 226-228 ◽  
pp. 1704-1708
Author(s):  
Quan Zhou ◽  
Yi Zhang ◽  
Hong Bin Guo ◽  
Qing Hai Li ◽  
Dong Xu Li
Keyword(s):  
Thermal Conductivity ◽  
Fatty Acid ◽  
Binary Mixture ◽  
Phase Change ◽  
Melting Temperature ◽  
Binary Mixtures ◽  
Latent Heat ◽  
Lauric Acid ◽  
Capric Acid ◽  
Heating And Cooling

Lauric acid(LA) and capric acid(CA) were mixed into binary mixture, whose melting temperature was predicted with Schroder’s equation and tested in step cooling curve method. Then latent heat was tested by DSC, and T-history method was used to test thermal conductivity of binary mixtures, heating and cooling characteristics were studied through expanded perlite(EP) adsorption of binary mixtures. Results show that Schroder’s equation can be used to predict melting temperature of fatty acid, and binary mixture prepared of 6:4 molar ratio has a high latent heat and its temperature is within a range that meets indoor comfort temperature. Thermal conductivity and the heating and cooling characteristics of the mixtures reveals that the thermal conductivity of fatty acid phase change material(PCM) is low, which restricts its latent heat release rate.

Preparation and Properties of Capric-Lauric-Palmitic Acid Eutectic Mixtures/Expanded Graphite Composite as Phase Change Materials for Energy Storage

2014 ◽  
Vol 1028 ◽  
pp. 40-45 ◽  
Author(s):  
Xue Huang ◽  
Yling De Cui ◽  
Bu Ning Zhang ◽  
Guo Qiang Yin ◽  
Guang Zhu Feng
Keyword(s):  
Thermal Conductivity ◽  
Phase Change ◽  
Melting Temperature ◽  
Latent Heat ◽  
Phase Change Materials ◽  
Ternary Eutectic ◽  
Eutectic Mixture ◽  
Expanded Graphite ◽  
Mass Ratio ◽  
Eutectic Mixtures

This work is focused on the preparation and properties of ternary fatty acid eutectic mixtures/ expanded graphite form-stable phase change materials (PCMs). Based on the theoretical calculation of the mass ratio and ternary eutectic melting temperature, the ternary eutectic mixture of capric acid (CA), lauric acid (LA) and palmitic acid (PA) was prepared firstly, which is for the sake of decreasing the phase transformation temperature. Thermal characteristics such as melting temperature and latent heat of fusion of these developed eutectics measured by using Differential Scanning Calorimetry (DSC) technique, which also showed that the eutectic mixture was composed by CA, LA and PA in the mass ratio of 59.7:30.1:10.02. Then the CA–LA–PA was absorbed in expanded graphite (EG), which acts as a supporting material, the optimum mass ratio of CA–LA–PA to EG is 17:1. The CA–LA–PA/EG composites were characterized by the scanning electronic microscope (SEM), differential scanning calorimeter (DSC). The SEM observations showed that the CA–LA–PA was adsorbed into the porous structure of EG, instead of any chemical action. The DSC results indicated that the phase change temperature and latent heat of the CA–LA–PA and CA–LA–PA/EG were 19.92 °Cand 19.48 °C, and 135.49 J/g and 130.73 J/g respectively. The thermal conductivity of CA–LA–PA /EG composite PCM was improved by the high thermal conductivity of the EG. Thermal cycling test showed that the CA–LA–PA/EG composite had a good thermal reliability. All results indicated that CA–LA–PA/EG composite PCM has a proper melting temperature and latent heat for building energy conservation.

Prediction of Melting Temperature and Latent Heat for Low-melting Metal PCMs

2016 ◽  
Vol 45 (4) ◽  
pp. 874-880 ◽  
Author(s):  
Aigang Pan ◽  
Junbiao Wang ◽  
Xianjie Zhang
Keyword(s):  
Melting Temperature ◽  
Latent Heat

scholarly journals Molten Salt Spectroscopy for Quantification of Radiative Absorption in Novel Metal Chloride-Enhanced Thermal Storage Media

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Philip D. Myers ◽  
D. Yogi Goswami ◽  
Elias Stefanakos
Keyword(s):  
Heat Transfer ◽  
Transition Metal ◽  
Melting Temperature ◽  
Latent Heat ◽  
Thermal Storage ◽  
Metal Chloride ◽  
Eutectic System ◽  
Metal Chlorides ◽  
Storage Media ◽  
Radiative Absorption

This study describes the development and characterization of novel high-temperature thermal storage media, based on inclusion of transition metal chlorides in the potassium–sodium chloride eutectic system, (K–Na)Cl (melting temperature of 657 °C, latent heat of 278 J/g). At the melting temperature of (K–Na)Cl, infrared (IR) radiation can play a major role in the overall heat transfer process—90% of spectral blackbody radiation falls in the range of 2–13 μm. The authors propose inclusion of small amounts (less than 0.2 wt.%) of IR-active transition metal chlorides to increase radiative absorption and thereby enhance heat transfer rates. A new IR-reflectance apparatus was developed to allow for determination of the spectral absorption coefficient of the newly formulated phase-change materials (PCMs) in the molten state. The apparatus consisted of an alumina crucible coated at the bottom with a reflective (platinum) or absorptive (graphite) surface, a heated ceramic crucible-holder, and a combination of zinc sulfide (ZnS) and zinc selenide (ZnSe) windows for containment of the salt and allowance of inert purge gas flow. Using this apparatus, IR spectra were obtained for various transition metal chloride additives in (K–Na)Cl and improved IR activity, and radiative transfer properties were quantified. Further, thermophysical properties relevant to thermal energy storage (i.e., melting temperature and latent heat) are measured for the pure and additive-enhanced thermal storage media.

scholarly journals Development of innovative medical devices by dispersing fatty acid eutectic blend on gauzes using supercritical particle generation processes

2019 ◽  
Vol 99 ◽  
pp. 599-610 ◽  
Author(s):  
Joana M. Silva ◽  
Salah Akkache ◽  
Ana C. Araújo ◽  
Yasmine Masmoudi ◽  
Rui L. Reis ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Medical Devices ◽  
Particle Generation ◽  
Fatty Acid Eutectic

Microencapsulation of Fatty Acid as Phase Change Material for Latent Heat Storage

2011 ◽  
Vol 137 (4) ◽  
pp. 214-219 ◽  
Author(s):  
Yan-Hua Bao ◽  
Wei Pan ◽  
Ting-Wei Wang ◽  
Ze Wang ◽  
Fang-Ming Wei ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Phase Change ◽  
Phase Change Material ◽  
Latent Heat ◽  
Heat Storage ◽  
Latent Heat Storage ◽  
Change Material

A study of accurate latent heat measurement for a PCM with a low melting temperature using T-history method

2006 ◽  
Vol 29 (7) ◽  
pp. 1225-1232 ◽  
Author(s):  
Jong Hyeon Peck ◽  
Jae-Jun Kim ◽  
Chaedong Kang ◽  
Hiki Hong
Keyword(s):  
Melting Temperature ◽  
Latent Heat ◽  
Heat Measurement
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