Numerical Analysis of Phase Change Material Characteristics Used in a Thermal Energy Storage Device

Date

2018-01-01

Author

Bonyadi, Nima
Somek, Suleyman Kazim
Ozalevli, Cemil Cihan
Baker, Derek Keıth
Tarı, İlker

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

206
views

0
downloads

In this study, a numerical analysis is performed to investigate the freezing process of phase change materials (PCM) in a predesigned thermal energy storage (TES) device. This TES device is integrated with a milk storage cooling cycle operating under predefined practical conditions. Using this cooling unit, 100 litres of milk is kept cool at 4 degrees C for 48 hours before it is collected. A 2-D model of the TES device is developed in COMSOL Multiphysics to analyze the phase change performance of water-based PCMs. The variations of thermal properties with temperature during the phase change are considered in the analysis. The model is used for exploring the solidification process of PCMs inside the TES device. Temperature variations with time, ice formation, and the impacts of boundary conditions are investigated in detail. Water PCM shows better characteristics in the solidification process in comparison to eutectic PCMs, which is mainly due to the differences between phase change temperatures of the PCMs.

Subject Keywords

Household refrigerator, PCM

URI

https://hdl.handle.net/11511/33075

Journal

HEAT TRANSFER ENGINEERING

DOI

https://doi.org/10.1080/01457632.2017.1295741

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

Numerical investigation of coupled heat and mass transfer inside the adsorbent bed of an adsorption cooling unit Solmus, Ismail; Rees, D. Andrew S.; Yamali, Cemil; Baker, Derek Keıth; KAFTANOĞLU, BİLGİN (2012-05-01) In this study, the influence of several design parameters on the transient distributions of temperature, pressure and amount adsorbed in the radial direction of a cylindrical adsorbent bed of an adsorption cooling unit using silica gel/water have been investigated numerically. For this purpose, a transient one-dimensional local thermal non-equilibrium model that accounts for both internal and external mass transfer resistances has been developed using the local volume averaging method. For the conditions in...
Numerical simulation of turbine internal cooling and conjugate heat transfer problems with Rans based turbulance models Görgülü, İlhan; Akmandor, İbrahim Sinan; Department of Aerospace Engineering (2012) The present study considers the numerical simulation of the different flow characteristics involved in the conjugate heat transfer analysis of an internally cooled gas turbine blade. Conjugate simulations require full coupling of convective heat transfer in fluid regions to the heat diffusion in solid regions. Therefore, accurate prediction of heat transfer quantities on both external and internal surfaces has the uppermost importance and highly connected with the performance of the employed turbulence mode...
Experiment-based optimization of an energy-efficient heat pump integrated water heater for household appliances Kütük, Erkan; Çetin, Barbaros; Bayer, Özgür (2022-04-15) Novel experimental-based study aims to determine the extent to which performance parameters of water heater system are altered when the heat pump is integrated and to clarify the optimum values of system variables by means of an optimization procedure using reliable experimental data. Considering compressor speed, air flow over evaporator as variables, experiments for both conventional electrical resistance and proposed heat pump integrated water heater for household appliances were conducted. Energy consum...
Computer simulation of grain boundary grooving and cathode voiding n bamboo interconnects by surface diffusion under capillary and electromigration forces Akyıldız, Öncü; Oğurtanı, Tarık Ö.; Department of Metallurgical and Materials Engineering (2004) The processes of grain boundary grooving and cathode voiding which are important in determining the life times of thin films connecting the transistors in an integrated circuit are investigated by introducing a new mathematical model, which flows from the fundamental postulates of irreversible thermodynamics, accounting for the effects of applied electric field and thermal stresses. The extensive computer studies on the triple junction displacement dynamics shows that it obeys the first order reaction kinet...
Numerical analysis of an organic Rankine cycle under steady and variable heat input Bamgbopa, Musbaudeen O.; Uzgoren, Eray (Elsevier BV, 2013-07-01) This paper develops a strategy to maintain steady operation of an organic Rankine cycle (ORC) by adjusting evaporator flow rates in relation to the available thermal energy. ORC unit under investigation uses R245fa as the working fluid, for which a regression based approach was implemented to evaluate its state properties. Steady and transient models for unit's subcomponents (pump, evaporator, expander and condenser) were developed. Heat source is considered as solar heated water between 80 degrees C and 95...

Citation Formats

N. Bonyadi, S. K. Somek, C. C. Ozalevli, D. K. Baker, and İ. Tarı, “Numerical Analysis of Phase Change Material Characteristics Used in a Thermal Energy Storage Device,” HEAT TRANSFER ENGINEERING, pp. 268–276, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33075.