Properties and Numerical Modeling-Simulation of Phase Changes Material

Fiala, Pavel; Behunek, I.; Drexler, P.

doi:10.5772/20199

Cited by 3 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…So far, very limited studies have reported using ANSYS (Fluent) to simulate the melting and freezing of CaCl26H2O or other PCM. Previous studies by Fiala et al [5], Rehman et al [6], and Wang et al [7] focus on the melting behaviour of CaCl26H2O. In addition, through an intensive study, Pan et al [8] have shown the agreement between the result of Numerical/simulation and experimental for comparing the melting patterns of CaCl26H2O confined in a vertical tube submerged in a water bath.…”

Section: Introductionmentioning

confidence: 96%

Geometry Effect of CaCl₂·6H₂O at Charging and Discharging Process as Latent TES

Yusuf

‘Ulhaq

Wonorahardjo

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Phase Change Materials (PCMs) as thermal energy storage can store a relatively large amount of latent heat at a relatively constant temperature during the solid to liquid (melting process), or vice versa. With many applications of PCM as temperature regulation such as for building application, heating, or cooling devices for battery, electronic, food preservation, and medicine, the geometry effect is significant to optimize its performance because each type of application requires a specific kind of geometry. This paper reports the simulation study for the charging and discharging an inorganic PCM of CaCl2·6H2O (melting temperature 29 °C) using Ansys fluent for various 3D and 2D geometric shapes, consisting of the sphere, cylinder, and rectangular solid. The density, heat capacity, thermal conductivity, and viscosity as the input parameters were taken or extrapolated from previous experimental studies. The simulation study results consisting of time-dependent temperature for melting and freezing transition and time-dependent liquid mass fraction can be used to optimize the CaCl2·6H2O as the medium of thermal energy storage (TES) as the medium of thermal energy storage (TES) for a specific application.

show abstract

Section: Introductionmentioning

confidence: 96%

Geometry Effect of CaCl₂·6H₂O at Charging and Discharging Process as Latent TES

Yusuf

‘Ulhaq

Wonorahardjo

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…(T s < T m < T l ) [42] Table 3, and the resulting Enthalpy vs. Temperature chart is shown in Figure 7.…”

Section: Phase Change Properties Of Plasticinementioning

confidence: 99%

“…Phase change transition initiates when the amplitude of the crystal lattice particles oscillate at a force having value larger than that of the crystal binding energy, thus breaking its bonds and transforming into liquid phase (melting). The removal of energy results in the solidification of the material (crystallization) [27]. The process of phase change during cooling exudes latent heat energy and is taken into account in ANSYS by employing the enthalpy model which defines the enthalpy as a function of temperature.…”

Section: Phase Changementioning

confidence: 99%

Modelling Phase Change in a 3D Thermal Transient Analysis

Haque¹,

Hampson²

2014

The International Journal of Multiphysics

View full text Add to dashboard Cite

“…Numerous research groups have improved CBT monitoring techniques to overcome the shortcomings of invasive techniques. To avoid direct measurements of the human body, Fiala et al − developed mathematical models to realize the thermal response of a subject under various environmental conditions in real time. The limitation of these studies is that the prediction is too general (not subject-specific).…”

mentioning

confidence: 99%

Noninvasive and Continuous Monitoring of the Core Body Temperature through the Quantitative Measurement of Blood Perfusion Rate

Woo

Kim

et al. 2023

ACS Sens.

View full text Add to dashboard Cite

Core body temperature (CBT) is one of the four vital signs that must be monitored continuously. The continuous recording of CBT is possible through invasive methods by inserting a temperature probe into specific body sites. We report a novel method to monitor CBT through the quantitative measurement of skin blood perfusion rate (ωb,skin). By monitoring the skin temperature, heat flux, and ωb,skin, the arterial blood temperature, equivalent to CBT, can be extracted. ωb,skin is quantitatively evaluated thermally via sinusoidal heating with regulated thermal penetration depth so that the blood perfusion rate is acquired only in the skin. Its quantification is significant because it indicates various physiological events including hyper- or hypothermia, tissue death, and delineation of tumors. A subject showed promising results with steady values of ωb,skin and CBT of 5.2 ± 1.05 × 10–4 s–1 and 36.51 ± 0.23 °C, respectively. For periods where the subject’s actual CBT (axillary temperature) did not fall within the estimated range, the average deviation from the actual CBT was only 0.07 °C. This study aims to develop a competent methodology capable of continuously monitoring the CBT and blood perfusion rate at a distant location from the core body region for the diagnosis of a patient’s health condition with wearable devices.

show abstract

Properties and Numerical Modeling-Simulation of Phase Changes Material

Cited by 3 publications

References 17 publications

Geometry Effect of CaCl₂·6H₂O at Charging and Discharging Process as Latent TES

Geometry Effect of CaCl₂·6H₂O at Charging and Discharging Process as Latent TES

Modelling Phase Change in a 3D Thermal Transient Analysis

Noninvasive and Continuous Monitoring of the Core Body Temperature through the Quantitative Measurement of Blood Perfusion Rate

Contact Info

Product

Resources

About

Properties and Numerical Modeling-Simulation of Phase Changes Material

Cited by 3 publications

References 17 publications

Geometry Effect of CaCl2·6H2O at Charging and Discharging Process as Latent TES

Geometry Effect of CaCl2·6H2O at Charging and Discharging Process as Latent TES

Modelling Phase Change in a 3D Thermal Transient Analysis

Noninvasive and Continuous Monitoring of the Core Body Temperature through the Quantitative Measurement of Blood Perfusion Rate

Contact Info

Product

Resources

About

Geometry Effect of CaCl₂·6H₂O at Charging and Discharging Process as Latent TES

Geometry Effect of CaCl₂·6H₂O at Charging and Discharging Process as Latent TES