Study of heat and fluid flow during melting of PCM inside vertical cylindrical tube

Bechiri, Mohammed; Mansouri, Kacem

doi:10.1016/j.ijthermalsci.2018.09.017

Cited by 62 publications

(12 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[24] tarafından yapılan deneysel çalışma ve aynı deney koşullarında Bechiri vd. [28] tarafından yapılan sayısal çalışma, oluşturulan modelin doğrulanmasında kullanılmıştır. Katsman vd.…”

Section: Sayısal Modelin Doğrulanması (Numerical Model Validation)unclassified

Kanatçıklı Dikey Silindirik Bir Tüp İçerisinde Faz Değiştiren Malzemenin Erime Analizi

İzgi

2024

Politeknik Dergisi

View full text Add to dashboard Cite

Bu çalışmada, ısıl enerji depolama sistemlerinde kullanılan silindirik olarak kapsüllenmiş faz değiştiren malzemenin erime süreci ve silindir içerisine kanatçık yerleştirilmesinin etkileri sayısal olarak incelenmiştir. Analizler için üç boyutlu, zamana bağlı Hesaplamalı Akışkanlar Dinamiği modeli oluşturulmuş ve oluşturulan model literatürdeki deneysel ve sayısal veriler ile doğrulanmıştır. Kanatçıkların erime sürecine etkilerini incelemek amacı ile 6, 9 ve 12 mm olmak üzere üç farklı kanatçık genişliği seçilmiştir. Kanatçıkların etkileri, faz değiştiren malzeme erime sıcaklığı ile silindirin dış duvar sıcaklığı arasındaki farkın 10, 20 ve 30 °C olduğu durumlarda analiz edilmiştir. Faz değiştiren malzeme içerisine yerleştirilen kanatçıkların erime sürecine önemli ölçüde etki ettiği, kanatçık genişliği arttıkça erime süresinin kısaldığı görülmüştür. Kanatçık etkisi ile erime süresindeki en büyük düşüş, 10 °C sıcaklık farkında 12 mm kanatçık genişliğinde elde edilmiştir. Bu durumda erime süresi 14.8 dakika iken kanatçıksız faz değiştiren malzemenin erime süresi 43.5 dakikadır.

show abstract

Section: Sayısal Modelin Doğrulanması (Numerical Model Validation)unclassified

Kanatçıklı Dikey Silindirik Bir Tüp İçerisinde Faz Değiştiren Malzemenin Erime Analizi

İzgi

2024

Politeknik Dergisi

View full text Add to dashboard Cite

show abstract

“…These results show that if fins can be optimized in terms of the number and inclination specified in a given operational design, the efficiency of the system can be increased by reducing the melting time of the desired phase variables . Mohammed Bechiri [13] conducted a numerical study of the melting of a phase variable substance (PCM) in a vertically placed cylinder. The upper space of the cylinder is filled with air to take into account the volumetric expansion of the phase variable.…”

Section: 4mentioning

confidence: 99%

Heat Transfer Analysis of the Melting Process on Finned Tubes (A Review on performance enhancement)

Younis¹,

Hamdoon²,

Majeed³

2023

(AREJ)

View full text Add to dashboard Cite

The performance of thermal systems, like heating and cooling systems, depends on a number of factors such as the geometrical shape, the working fluid used to transfer or store heat, and the operating conditions. Accordingly, many studies concentrated on improving the thermal performance of such systems and raising their thermal efficiency by modifying their geometry or using phase-changing materials. Therefore, this work is reviewing the previous studies that dealt with modifying the geometry, by adding annular or longitudinal fins on the main tube of the heat exchanger, and employing different types of phase change materials. This article also presents the previous scientific articles that investigated the effects of changing the location and the orientation of the fins. For the reviewed studies in this article, it is worth mentioning that the numerical investigations outnumbered the experimental ones as the authors focused on finding the optimal design of the studied thermal systems. Furthermore, the previous studies employed phase-change materials, e.g. fatty acids, waxes, and salts, due to their ability to store energy and reuse it in a wide range of applications.

show abstract

“…Numerical analysis was used to evaluate the melting of partly filled PCM in a vertical cylindrical tube. The results show that the tube diameter, outer wall surface temperature, thermophysical properties, and thickness of the tube shell have a significant impact on the melting process [14]. Experimental research was done on PCM melting inside of a spherical container.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Effect of Air Bubble Location on the PCM Melting Process in a Rectangular Cavity

Khalaf¹,

Rashid²,

Basem³

et al. 2023

MMEP

View full text Add to dashboard Cite

The technique of phase change thermal storage is an effective solution to overcoming the problem of a mismatch between the supply of energy and the demand for it. In this work, a numerical investigation of the influence of an air bubble placement on the paraffin wax melting (PCM) inside of a rectangular cavity is described. The PCM refers to the melting of paraffin wax. In order to conduct a numerical investigation of the research, the enthalpy-porosity combination (the ANSYS / FLUENT 16 program) is used. For the purpose of this experiment, phase change materials for paraffin wax are being used (RT58). As a result of examining several locations of the air bubble (top, center, and bottom) in the rectangular cavity, this paper investigates the influence of air bubbles on the dissolution process and heat transfer. Additionally, the paper investigates the influence of air bubbles on the amount of time that it takes for paraffin wax to melt. When compared to the presence of air bubbles in the center, the presence of air bubbles at the bottom and top of the solution has resulted in a 7% reduction in the amount of time needed to complete the process of dissolution. It has been shown that the presence of air bubbles naturally advances the dissolving process, and it has also been demonstrated that the dissolution process will be accelerated when it is known that the volume of PCMs is greater since it includes the volume of air bubbles.

show abstract

Study of heat and fluid flow during melting of PCM inside vertical cylindrical tube

Cited by 62 publications

References 36 publications

Kanatçıklı Dikey Silindirik Bir Tüp İçerisinde Faz Değiştiren Malzemenin Erime Analizi

Kanatçıklı Dikey Silindirik Bir Tüp İçerisinde Faz Değiştiren Malzemenin Erime Analizi

Heat Transfer Analysis of the Melting Process on Finned Tubes (A Review on performance enhancement)

Numerical Study of the Effect of Air Bubble Location on the PCM Melting Process in a Rectangular Cavity

Contact Info

Product

Resources

About