ANALYSIS OF MELTING BEHAVIORS OF PHASE CHANGE MATERIALS USED IN HEAT ENERGY STORAGE SYSTEMS
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Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Begell House Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the thermal behavior of various phase change materials (PCM), as well as their melting behavior, is studied. Accordingly, 4 different PCMs including RT35, n-eicosane, n-octadecane, and gallium are selected. A shell-and-tube type heat exchanger model with 9 inner tubes is created while it is assumed that hot water flows from the inner tubes of heat exchangers and PC:M filling is wrapped outside these tubes. For all PCM types investigated in this study, the water flow rate inside the inner tube is assumed to be constant and equal to 0.03 kg/s with the temperature range being 55-75 degrees C while the numerical analysis is conducted using the computational fluid dynamics to determine the velocity and temperature distributions within flow volume. The melting amount and stored energy of the PCMs are analyzed while their melting behaviors are determined. As a result, it is observed that the average material temperature, melting speed, and stored energy amount are increased as the water inlet temperature increased for all PCMs considered in this study. It was determined that the melting time of the material is decreased with increase in the water inlet temperature for all materials. The determined material melting speeds are ranked as gallium > n-octadecane > RT35 > n-eicosane while the energy storage capacities are ranked as n-eicosane > n-octadecane > R135 > gallium. However, although the energy storage capacity of n-eicosane is the highest, it was observed that its full capacity storage time is long. Since n-octadecane has a high melting rate and high energy storage capacity, it is determined to provide optimum thermal performance in the heat storage system studied.
Açıklama
Anahtar Kelimeler
phase change material (PCM); RT35; n-eicosane; n-octadecane; gallium
Kaynak
Heat Transfer Research
WoS Q Değeri
Q4
Scopus Q Değeri
Q2
Cilt
53
Sayı
1
