Conjugate Heat Transfer in Latent Heat Thermal Storage System With Cross Plate Fins
01 Oct 2015-Journal of Heat Transfer-transactions of The Asme (American Society of Mechanical Engineers)-Vol. 137, Iss: 10, pp 102302
About: This article is published in Journal of Heat Transfer-transactions of The Asme.The article was published on 2015-10-01. It has received 9 citations till now. The article focuses on the topics: Heat transfer & Plate fin heat exchanger.
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TL;DR: In this article, the influence of various structure characters on the heat transfer were analyzed, including the heat-transfer direction, pore size, and pore geometry, and volume fraction.
Abstract: Phase change materials have been widely applied in thermal energy storage, while its applications are quite limited due to the long melting time. In the present work, the metallic 2-dimensional porous structure was probed for shortening the melting time. For straightforward prediction of melting time, a theoretical formula was firstly developed in this work, which matches the numerical results well. Then the influences of various structure characters on the heat transfer were analyzed, including the heat transfer direction, pore size, pore geometry, and volume fraction. Results turn out that: to obtain relatively short melting time, the heat-transfer direction should be parallel to the axis of the copper pore, and the pore size should be larger than 500 nm but smaller than 1 mm. The composite at nanoscale is a better choice than that at macroscale due to their larger heat storage density. In the manufacture, the pore geometry with a large sphericity is preferable for shortening melting time. This study is expected to supply some information for the selection of proper structures for a thermal energy storage system to reduce melting time.
8 citations
TL;DR: In this article , a machine learning-based diagnosis technique for a phase change materials (PCM)-based thermal management system is proposed to predict the liquid fraction using surface temperature history.
4 citations
01 Jan 2018
2 citations
Cites methods from "Conjugate Heat Transfer in Latent H..."
...[134] used an artificial neural network to find an optimal melting solution for a finned rectangular LHTSD with four independent parameters....
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TL;DR: In this article, the authors used simulation models to determine and minimize rate of heat loss of a simulated cylindrical kaolin thermal insulator within the working temperature range of 800 - 1000 C.
Abstract: Storage of thermal energy has become a growing area of interest amongst researchers over the past few decades. This is so because of the wide variety of applications that can benefit from this technology. When perfected, waste heat from industrial plants and the sun can be stored for reuse at a later point in time, thus improving the energy efficiency of the system. Heat loss is a significant challenge that affects the efficiency of a thermal storage system especially at the high temperature range. In minimizing heat loss rate of thermal insulation layer, this work aims to use simulation models to determine and minimize rate of heat loss of a simulated cylindrical kaolin thermal insulator within the working temperature range of 800 – 1000 C. Two direction were used which are radial and axial. They were simulated and analyzed one after the other. Two simulation software were employed to validate the results from each of them. Length of thermal insulation, temperature of inner surface and ambient temperature were the independent variables accounted for this work while the rate of heat loss at the outer surface was the dependent variable. In the axial direction, the dependent variable was more sensitive to changes in the independent variables compared to the radial direction. The change in the length of the thermal insulation layer had the highest impact on the dependent variable followed by the temperature of the internal surface and then lastly by the combined effect of these two factors. The effect of ambient temperature was insignificant. From the results of the work, suggestion was made from the simulation results, that the length of 0.22 m will be used to construct a portable thermal storage unit within the operating temperature range of 700 – 900 C. In conclusion, results will also serve as framework for the simulation at higher working temperatures.
1 citations
References
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TL;DR: In this article, an enthalpy formulation based fixed grid methodology is developed for the numerical solution of convection-diffusion controlled mushy region phase-change problems, where the basic feature of the proposed method lies in the representation of the latent heat of evolution, and of the flow in the solid-liquid mushy zone, by suitably chosen sources.
1,892 citations
TL;DR: In this article, the use of phase change material (PCM)-based heat sink in transient thermal management of plastic quad flat package (QFP) electronic devices was investigated experimentally and numerically.
407 citations
TL;DR: In this paper, an experimental study was conducted on the cooling of mobile electronic devices, such as personal digital assistants (PDAs) and wearable computers, using a heat storage unit (HSU) filled with the phase change material (PCM) of n-eicosane inside the device.
313 citations
TL;DR: In this paper, the effects of various parameters such as power levels, number of fins, fin height and fin thickness on the performance of a phase change material (PCM)-based heat sink were investigated.
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TL;DR: In this article, the phase change material (PCM) used in this study is n-eicosane and is placed inside a heat sink made of aluminium, which acts as thermal conductivity enhancer.
231 citations