Modelling Phase Change in a 3D Thermal Transient Analysis

Haque, Enamul; Hampson, P. R.

doi:10.1260/1750-9548.8.1.49

Cited by 14 publications

(3 citation statements)

References 31 publications

(19 reference statements)

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“…Haque, P.R. Hampson [10] A 3D thermal transient analysis of a gap profiling technique which utilises phase change material (plasticine) is conducted in ANSYS. Phase change is modelled by assigning enthalpy of fusion over a wide temperature range based on Differential Scanning Calorimetry (DSC) results.…”

Section: IImentioning

confidence: 99%

Heat Transfer Enhancement of Phase Change Materials (PCM) in Thermal Storage Device

Babu¹

2019

IJRASET

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The analysis was performed on the PCM materials by varying outer radii of thermal energy system for paraffin wax material. The analysis was continue for various PCM materials to estimate the melting time of the PCM materials for this problem Examine the melting time of PCM material n-Eicosane wax and increasing radius of pipe in PCM system. The melting time was decreased for Outer radius of Pipe varying from 0.022 m and 0.028m but the melting time was increased for Outer radius of Pipe 0.03m. It was clearly show that the melting time was decreased from 1187 seconds to 1152 seconds with respect to the radius of pipe. At the radius of 0.03m of pipe the melting temperature found that 1177seconds i.e. the time duration was again increased. The melting temperature of the PCM materials and the duration of melting time. The highest melting time (6127 sec) of PCM material is NH4 Al (SO4)2_12H2O liquid and lowest melting time (915sec) of PCM material is CaCl2_6H2O for selected PCM materials from this study.

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Section: IImentioning

confidence: 99%

Heat Transfer Enhancement of Phase Change Materials (PCM) in Thermal Storage Device

Babu¹

2019

IJRASET

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“…Since most of the LHSM's literature lacks of exact c p (T) distribution data, a simplified "peak type" c p (T) model has been applied in analogy to the enthalpy based model description in [37]. The requirement to the TEC assisted thermal buffer is to provide a near-zero (referred to overload power) thermal resistance and literally soak all the OL heat, inducing no temperature increase.…”

Section: Transient Thermal Materials Datamentioning

confidence: 99%

Thermal management of electrical overload cases using thermo-electric modules and phase change buffer techniques: Simulation, technology and testing

Springborn

Wunderle

May

et al. 2014

2014 15th International Conference on Thermal, Mechanical and Mulit-Physics Simulation and Experiments in Microelectronics and

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In this paper, a new and dedicated phase change cooling concept is discussed, following the goal to buffer periodic overload operations of electric power modules and thus keeping junction temperatures constant. A top-mounted latent heat storage material (LHSM) buffer is applied, to soak the overload heat in conjunction with thermo-electric coolers (TECs), which control the temperature and phase change process. The cooling system is going to be realized within an IGBT converter module, undergoing repeated overload situations. The concept features double-sided cooling and assembling as well as new materials and joining technologies such as transient liquid phase bonding/soldering and silver sintering. One-dimensional equivalent circuit estimations and transient electro-thermal FE simulations were used to calculate the cooling performance, extract optimization guidelines and discuss potential difficulties of the concept. Furthermore, the simulations are successively refine d and brought into agreement with various test stands and characterization methods of reduced complexity

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“…Then, the liquid starts changing its phase to resolve the non-equilibrium state. This phenomenon of explosive vaporization is called the flashing phenomenon and is of special interest in engineering for the designs of safety systems involving high-pressure and/or high-temperature liquids, particularly in connection with a loss-of-coolant accident (LOCA) in nuclear reactors [1][2][3][4][5] and LNG storage tanks [6]. While many works concerning with the flashing phenomenon have focused on hot water in a high rate of depressurization (over 100MPa/s), flashing of fluids other than water and under slow rate of depressurization have not been investigated sufficiently.…”

Section: Introductionmentioning

confidence: 99%

Phenomena of Liquid Nitrogen Flashing under Rapid Depressurizations

2022

IJM

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Flashing Experiment of liquid nitrogen in a pressure vessel was conducted under rapid depressurization rate. Observations of the explosive boiling behavior caused by quick opening of a electro-magnetic valve were undertaken by using a video camera. Pressure and temperature changes in the vessel were measured. Depressurization rates in these experiments fell in the range from 0.01 to 4.0MPa/s. Experimental results showed that the initial temperature distributions and depressurization rates have more intrinsic influence on these flashing phenomena. Relationship between pressure undershoot and depressurization rate was obtained. The rate of pressure recovery was found to increase with the rate of depressurization, which also resulted in the increase of the increment of pressure recovery. The empirical equation proposed by Alamgir and Lienhard was applied to predict the recovery pressure of the flashing of liquid nitrogen. To obtain more precise prediction of the pressure recovery, another factor such as an orifice diameter that affects the discharge condition of the recovery pressure.

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Modelling Phase Change in a 3D Thermal Transient Analysis

Cited by 14 publications

References 31 publications

Heat Transfer Enhancement of Phase Change Materials (PCM) in Thermal Storage Device

Heat Transfer Enhancement of Phase Change Materials (PCM) in Thermal Storage Device

Thermal management of electrical overload cases using thermo-electric modules and phase change buffer techniques: Simulation, technology and testing

Phenomena of Liquid Nitrogen Flashing under Rapid Depressurizations

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