PDF Publication Title:
Text from PDF Page: 021
M.M. Kenisarin, et al. Journal of Energy Storage 27 (2020) 101082 Fig. 39. Experimental data and their comparison: a - variation of the interface the capsule size [103]. Fig. 40.Fig 40 Molten fraction as a function of dimensionless time ( = tk T =FoSte) [104]. Fig. 41. Effect of the capsule material on the dimensionless time for complete charging [105]. The authors investigated water and mixtures of water with 3.75, 7.5, 15, 25, 30, 40 and 50% Glycol content as PCMs. The main results of their study are summarized in Fig. 38. The study demonstrated that the increase of the glycol content in the mixture reduces the phase change temperature, reaching –15 °C when the Glycol content is 50% and in- creases the time for complete solidification. Despite the good agreement of numerical and experimental data, see Fig. 39, no correlation for calculation of the solidified fraction was proposed. position with working temperature; b - variation of the solidified mass fraction with Fig. 42. Variation of the solidified mass fraction with the dimensionless time for different capsule materials [105]. Rajeev and Das [104] proposed a method based on using the time function approximated by Chebyshev series and the operational matrix of integration for the numerical solution of inward solidification of a PCM, contained in cylinder/sphere. It was assumed that the thermal properties of the PCM are constant throughout the analysis for solid and liquid states. The PCM is initially at the fusion temperature, and the solution was achieved using an iterative procedure. The molten fraction of PCM, found by using the proposed method, can be seen in Fig. 40. The theoretical results produced by the authors were not compared to theoretical or experimental data in other studies. ElGhnam et al. [105] carried out a comprehensive experimental study of freezing and melting of water inside spherical envelopes. Distilled water was chosen as the PCM. In the experiments, they used spherical capsules made of copper, brass, stainless steel, glass and plastic with inner diameters of 42, 70, 92, 110 and 126 mm. The temperature of the HTF, flowing around the sphere with the volumetric rate of 1, 3, 4, 5 and 7 liters per minute, was maintained at -4, -6, -8, -10 and -12 °C. The PCM temperature inside the spherical capsule was measured using 13 thermocouples. Figs. 41–43 present only a part of large volume of experimental data obtained in this work. No correlation was derived for calculation of solidified mass fraction using this data, as it was done by Assis et al. in [101]. Chandrasekaran et al. [106–109] performed the comprehensive experimental investigation of PCM solidification in spherical capsules. Thus, in [106], they analysed the heat transfer in pure water and water/ nano copper oxide composition. A low-density polyethylene spherical capsule of 68 mm diameter, filled with the PCM up to 90% of its full LR2 21PDF Image | Journal of Energy Storage 27
PDF Search Title:
Journal of Energy Storage 27Original File Name Searched:
tes-spherical-ball-storage-paraffin.pdfDIY PDF Search: Google It | Yahoo | Bing
Turbine and System Plans CAD CAM: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. More Info
Waste Heat Power Technology: Organic Rankine Cycle uses waste heat to make electricity, shaft horsepower and cooling. More Info
All Turbine and System Products: Infinity Turbine ORD systems, turbine generator sets, build plans and more to use your waste heat from 30C to 100C. More Info
CO2 Phase Change Demonstrator: CO2 goes supercritical at 30 C. This is a experimental platform which you can use to demonstrate phase change with low heat. Includes integration area for small CO2 turbine, static generator, and more. This can also be used for a GTL Gas to Liquids experimental platform. More Info
Introducing the Infinity Turbine Products Infinity Turbine develops and builds systems for making power from waste heat. It also is working on innovative strategies for storing, making, and deploying energy. More Info
Need Strategy? Use our Consulting and analyst services Infinity Turbine LLC is pleased to announce its consulting and analyst services. We have worked in the renewable energy industry as a researcher, developing sales and markets, along with may inventions and innovations. More Info
Made in USA with Global Energy Millennial Web Engine These pages were made with the Global Energy Web PDF Engine using Filemaker (Claris) software.
Sand Battery Sand and Paraffin for TES Thermo Energy Storage More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)