Numerical Simulation of Two Phase Change Materials Melting Process

2014 ◽  
Vol 1049-1050 ◽  
pp. 94-100
Author(s):  
Bo Bo Zhang ◽  
Yu Ming Xing ◽  
Qiang Sheng
Keyword(s):  
Numerical Simulation ◽  
Energy Storage ◽  
Temperature Distribution ◽  
Phase Change ◽  
Latent Heat ◽  
Control Function ◽  
Melting Process ◽  
Thermal Control ◽  
Heat Energy ◽  
Two Phase

Phase change thermal control technology has gained increasing focus as an emerging technology for the thermal control of spacecraft. This literature focused on melting process inside a latent heat energy storage filled with phase change material (PCM) by numerical simulation. A matrix-based enthalpy porosity theory in a three-dimensional finite volume discretization is simulated. The temperature distribution during the melting process of PCM Cerrolow-136 and CH3COONa·3H2O is obtained, based on which the thermal control function and energy storage capacity is compared. The results show that Cerrolow-136 has better performance. In different states of phase change, the temperature distribution of Cerrolow-136 is fairly uniform. Thermal control face's temperature of Cerrolow-136 is closer to phase transition temperature. In the same heat flux of 3000 W/m2, The whole process of thermal control temperature getting to 80°C for Cerrolow-136 is longer. Cerrolow-136, for its excellent characteristics, has potentially broad application in the fields of latent heat energy storage and space vehicle electronics.

Thermal Behavior of Phase Change Material During Charging Inside a Finned Cylindrical Latent Heat Energy Storage System: Effects of the Arrangement and Number of Fins

2010 ◽  
Author(s):  
Dominic Groulx ◽  
Wilson Ogoh
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Material ◽  
Latent Heat ◽  
Storage System ◽  
Heat Energy ◽  
Hot Water ◽  
Heat Of Fusion ◽  
Melting Front ◽  
Change Material

One way of storing thermal energy is through the use of latent heat energy storage systems. One such system, composed of a cylindrical container filled with paraffin wax, through which a copper pipe carrying hot water is inserted, is presented in this paper. It is shown that the physical processes encountered in the flow of water, the heat transfer by conduction and convection, and the phase change behavior of the phase change material can be modeled numerically using the finite element method. Only charging (melting) is treated in this paper. The appearance and the behavior of the melting front can be simulated by modifying the specific heat of the PCM to account for the increased amount of energy, in the form of latent heat of fusion, needed to melt the PCM over its melting temperature range. The effects of adding fins to the system are also studied, as well as the effects of the water inlet velocity.

scholarly journals Analysis of heat and mass transfer mechanism during thermal energy storage and temperature regulation

2020 ◽  
Vol 24 (5 Part B) ◽  
pp. 3185-3193
Author(s):  
Sina Dang ◽  
Hongjun Xue ◽  
Xiaoyan Zhang ◽  
Chengwen Zhong
Keyword(s):  
Mass Transfer ◽  
Energy Storage ◽  
Low Temperature ◽  
Phase Change ◽  
Heat And Mass Transfer ◽  
Latent Heat ◽  
Temperature Regulation ◽  
Phase Change Materials ◽  
Heat Energy ◽  
Temperature Environment

To strengthen the heat and mass transfer capacity and improve the temperature regulation rate, potential storage is taken as the research object in this research to study the heat energy storage of the battery in the low temperature environment. Lattice Boltzmann method is adopted to study the heat energy storage influence mechanism of the temperature regulation system of the low temperature phase-change materials. In addition, the influence of different physical parameters (thermal conductivity and latent heat of phase change) on the thermal insulation of the system in the process of temperature control is revealed. The results show that the mechanism of heat and mass transfer in the process of heat storage and temperature control is related to the different physical properties of phase change materials. The decrease of thermal conductivity and the increase of latent heat of phase change materials will greatly increase the effect of heat energy storage. Therefore, under the action of phase change latent heat, phase change material can effectively extend the holding time of the battery in the low temperature environment.

Preparation of Energy Storage Ceramsite Manufactured from East Lake Sludge

2011 ◽  
Vol 287-290 ◽  
pp. 694-698
Author(s):  
Bao Guo Ma ◽  
Jun Wang ◽  
Yuan Yuan Wu ◽  
Wen Yang
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Latent Heat ◽  
Building Materials ◽  
Melting Process ◽  
Vacuum Impregnation ◽  
Impregnation Method ◽  
Combination Methods ◽  
East Lake ◽  
Lake Sludge

Phase change material (PCM) can absorb or release a large quantity of latent heat when it changes phase from solid state to liquid state or vice versa, and has very important applications in thermal energy storage systems. One of the combination methods is incorporating PCM in porous building materials, which are suitable matrix materials for PCM. In this paper, two kinds of ceramsite manufactured from East Lake sludge and paraffin were selected to form phase change composites by using the vacuum impregnation method. Differential scanning calorimeter (DSC) analysis was used to evaluate the phase change behavior. The result showed that the peak temperature (TP) and latent heat of the melting process of the paraffin in ceramsite A and B was a little higher than that of the bulk paraffin.

Experimental Study of Cylindrical Latent Heat Energy Storage Systems Using Lauric Acid as the Phase Change Material

2012 ◽  
Author(s):  
Chang Liu ◽  
Robynne E. Murray ◽  
Dominic Groulx
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Energy Storage ◽  
Phase Change ◽  
Latent Heat ◽  
Storage Systems ◽  
Heat Energy ◽  
Hot Water ◽  
Energy Storage Systems ◽  
Water Flows

Phase change materials (PCMs) inside latent heat energy storage systems (LHESS) can be used to store large amounts of thermal energy in relatively small volumes. However, such systems are complicated to design from a heat transfer point of view since the low thermal conductivity of PCMs makes charging and discharging those systems challenging on a usable time scale. Results of experiments performed on both a vertical and a horizontal cylindrical LHESS, during charging, discharging and simultaneous charging/discharging, are presented in this paper. Both LHESS are made of acrylic plastic, the horizontal LHESS has one 1/2″ copper pipe passing through its center. The vertical LHESS has two 1/2″ copper pipes, one through which hot water flows, and the other through which cold water flows. Each of the pipes has four longitudinal fins to enhance the overall rate of heat transfer to and from the PCM, therefore reducing the time required for charging and discharging. The objective of this work is to determine the phase change behavior of the PCM during the operation of the LHESS, as well as the heat transfer processes within the LHESS. Natural convection was found to play a crucial role during charging (melting) and during simultaneous charging/discharging (in the vertical LHESS). However, during discharging, the effect of natural convection was reduced in both systems.

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