The effect of heat storage on supercritical flow stability in two heated parallel channels

2020 ◽  
Vol 153 ◽  
pp. 119599 ◽  
Author(s):  
D.S. Ghadge ◽  
V. Chatoorgoon ◽  
S.J. Ormiston
Keyword(s):  
Heat Storage ◽  
Flow Stability ◽  
Supercritical Flow ◽  
Parallel Channels

Supercritical Flow Stability in Two Parallel Channels

2006 ◽  
Author(s):  
Vijay Chatoorgoon
Keyword(s):  
Analytical Study ◽  
Two Phase Flow ◽  
Flow Instability ◽  
Flow Stability ◽  
Phase Flow ◽  
Two Phase ◽  
Supercritical Flow ◽  
Light Water ◽  
Parallel Channels

An analytical study of supercritical flow stability in two parallel channels is reported here. This would be of immense value to new reactor designs that propose to use supercritical light water on the primary side. The finding is that two-phase flow instability and supercritical flow instability are not identical, as there are notable phenomenological differences as well as mathematical differences.

Modeling and analysis of supercritical flow instability in parallel channels

2013 ◽  
Vol 57 (2) ◽  
pp. 549-557 ◽  
Author(s):  
Ting Xiong ◽  
Xiao Yan ◽  
Shanfang Huang ◽  
Junchong Yu ◽  
Yanping Huang
Keyword(s):  
Flow Instability ◽  
Supercritical Flow ◽  
Modeling And Analysis ◽  
Parallel Channels

Experimental Investigation of Flow Instability Between Two Vertical Parallel Channels Using Supercritical CO2

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Anantvir Singh Saini ◽  
Vijay Chatoorgoon ◽  
Dhanashree S. Ghadge
Keyword(s):  
Flow Instability ◽  
Working Fluid ◽  
Parallel Channel ◽  
Outlet Channel ◽  
Supercritical Flow ◽  
University Of Manitoba ◽  
Parallel Channels ◽  
Channel Assembly ◽  
Flow Experiments ◽  
Insight Into

Abstract Supercritical flow experiments were conducted at University of Manitoba using supercritical flow facility-vertical (SFF-V), which is a two vertical parallel channel assembly. The working fluid was CO2 at supercritical pressure and was driven by natural convective forces rather than a pump. Different system pressures (7.4 MPa–9.1 MPa), inlet temperatures (7 °C–30.1 °C) and various outlet-channel k-factors were used. A total of eleven parallel channel out-of-phase instability boundary points were obtained and the details of those cases are reported herein. These results can be used for code validation, to enrich the limited database of supercritical parallel-channel instability and to lend further insight into supercritical flow instability in heated parallel channels.

Electron microscopy of niobium and tantalum hydrides

1978 ◽  
Vol 36 (1) ◽  
pp. 644-645
Author(s):  
T. Schober
Keyword(s):  
Electron Microscopy ◽  
Heat Storage ◽  
Measurement Techniques ◽  
Metal Hydrides ◽  
Detailed Understanding ◽  
Storage Devices ◽  
Unit Cells ◽  
Endothermic Reactions ◽  
Hydrogen Reactions ◽  
New Phase

Nb, Ta and V are prototype substances for the study of the endothermic reactions of H with metals. Such metal-hydrogen reactions have gained increased importance due to the application of metal-hydrides in hydrogen- und heat storage devices. Electron microscopy and diffraction were demonstrated to be excellent methods in the study of hydride morphologies and structures (1). - Figures 1 and 2 show the NbH and TaH phase diagrams (2,3,4). EM techniques have contributed substantially to the elucidation of the structures and domain configurations of phases β, ζ and ε (1,4). Precision length measurement techniques of distances in reciprocal space (5) recently led to a detailed understanding of the distortions of the unit cells of phases ζ and ε (4). In the same work (4) the existence of the new phase η was shown. It is stable near -68 °C. The sequence of transitions is thus below 70 %.

Latent heat storage for hot beverages

2019 ◽  
Vol 13 (3) ◽  
pp. 5653-5664
Author(s):  
M. S. M. Al-Jethelah ◽  
H. S. Dheyab ◽  
S. Khudhayer ◽  
T. K. Ibrahim ◽  
A. T. Al-Sammarraie
Keyword(s):  
Latent Heat ◽  
Food Industry ◽  
Heat Storage ◽  
Food Storage ◽  
Thermal Engineering ◽  
Engineering Applications ◽  
Latent Heat Storage ◽  
The Impact ◽  
Encapsulated Phase Change Material ◽  
Change Material

Latent heat storage has shown a great potential in many engineering applications. The utilization of latent heat storage has been extended from small scales to large scales of thermal engineering applications. In food industry, latent heat has been applied in food storage. Another potential application of latent heat storage is to maintain hot beverages at a reasonable drinking temperature for longer periods. In the present work, a numerical calculation was performed to investigate the impact of utilizing encapsulated phase change material PCM on the temperature of hot beverage. The PCM was encapsulated in rings inside the cup. The results showed that the encapsulated PCM reduced the coffee temperature to an acceptable temperature in shorter time. In addition, the PCM maintained the hot beverage temperature at an acceptable drinking temperature for rational time.

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