Longitudinal acoustic and higher-energy excitations in the liquid phase-change material Ge2Sb2Te5

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
M. Inui ◽  
Y. Kajihara ◽  
S. Hosokawa ◽  
A. Chiba ◽  
Y. Nakajima ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Phase Change ◽  
Phase Change Material ◽  
Longitudinal Acoustic ◽  
Change Material

scholarly journals The additional heat flux due to adhesion at a partially immersed rotating drum heat exchanger for latent heat storage

2021 ◽  
Vol 2116 (1) ◽  
pp. 012097
Author(s):  
J Tombrink ◽  
E Jung ◽  
D Bauer
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Heat Exchanger ◽  
Liquid Phase ◽  
Phase Change ◽  
Layer Thickness ◽  
Phase Change Material ◽  
Rotating Drum ◽  
Additional Heat ◽  
Change Material

Abstract Latent heat storages can be used to store thermal energy at a constant temperature. By actively removing the solidified phase change material from the heat exchanger surface during the discharge process, the heat flux can be kept constant and a separation of power and capacity is possible. In the presented rotating drum concept, a cooled drum is partially immersed in a tub of liquid phase change material and rotates in it. Phase change material solidifies at the submerged part of the drum. In addition, adhering liquid phase change material solidifies after the surface has left the tub. In this paper, the additional heat transfer due to adhesion is examined by determining the solidified layer thickness as well as the heat transfer by comparing measurements with adhesion and while eliminating the adhesion with a rubber lip. The measured adhering layer thickness differs by 33% from a presented analytical approach. The transferred heat is increased up to 26 % due to the adhesion.

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