Modeling of the Transient Heat Transfer Across a Heat Transfer Tube in a Bubbling Fluidized Bed

1996 ◽  
Vol 118 (1) ◽  
pp. 258-261 ◽  
Author(s):  
A. I. Karamavruc¸ ◽  
N. N. Clark ◽  
G. Ganser
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Transient Heat Transfer ◽  
Heat Transfer Tube ◽  
Transfer Tube ◽  
Bubbling Fluidized Bed

Mechanisms of Heat Transfer Enhancement of Gas–Solid Fluidized Bed: Estimation of Direct Contact Heat Exchange From Heat Transfer Surface to Fluidized Particles Using an Optical Visualization Technique

1995 ◽  
Vol 117 (1) ◽  
pp. 104-112 ◽  
Author(s):  
Y. Kurosaki ◽  
I. Satoh ◽  
T. Ishize
Keyword(s):  
Heat Transfer ◽  
Heat Exchange ◽  
Fluidized Bed ◽  
Flow Rate ◽  
Direct Contact ◽  
Heat Transfer Surface ◽  
Heat Transfer Tube ◽  
Transfer Tube ◽  
Contact Frequency ◽  
Fluidized Particles

This paper deals with mechanisms of heat transfer in a gas–solid fluidized bed. Heat transfer due to heat exchange by direct contact from a heat transfer tube immersed in the bed to fluidized particles was studied by means of visualization of contact of the fluidized particles to the heat transfer surface. The results show that the duration of contact of fluidized particles was almost uniform over the tube circumference and was hardly affected by the flow rate of fluidizing gas. On the other hand, the contact frequency between the particles and heat transfer tube was evidently influenced by the gas flow rate and particles diameter, as well as the location on the tube circumference. Using the visualized results, the amount of heat conducted to fluidized particles during the contact was estimated. This result showed that unsteady heat conduction to the fluidized particles plays an important role in the heat transfer, especially at the condition of incipient fluidization.

scholarly journals Development Progress on the Atmospheric Fluidized Bed Coal Combustor for Cogeneration Gas Turbine System for Industrial Cogeneration Plants

1980 ◽  
Vol 102 (2) ◽  
pp. 292-296 ◽  
Author(s):  
R. S. Holcomb
Keyword(s):  
Heat Transfer ◽  
Gas Turbine ◽  
Fluidized Bed ◽  
Conceptual Design ◽  
Gas Turbines ◽  
Test System ◽  
Department Of Energy ◽  
Heat Transfer Tube ◽  
Transfer Tube ◽  
Exhaust Heat

The Atmospheric Fluidized Bed Coal Combustor Program will develop the technology for a fluidized bed coal combustion system to provide a source of high temperature air for process heating and power generation with gas turbines in industrial plants. The gas turbine has the advantages of a higher ratio of electric power output to exhaust heat load and a higher exhaust temperature than do steam turbines in cogeneration applications. The program is directed toward systems in the size range of 5 to 50 MW(e) and is sponsored by the Department of Energy. A study of industrial energy use has been completed that indicates a large potential market for gas turbine cogeneration systems. Conceptual design studies have been done for typical industrial’ installations, and some of these results are presented. The conceptual design of a 300 kW(e) test unit has been completed. A number of furnace design firms have been invited to submit their own designs for a 1500 kW(t) (5 × 106 Btu/hr) combustor, from which a final selection will be made. The design of the balance of the test system will proceed in parallel with the combustor design. An engineering design study has been completed by AiResearch Division of Garrett Corporation in which the modifications required to adapt an existing AiResearch 831-200 gas turbine to this cycle for both open and closed cycle operation were determined. Development and testing have been conducted in the areas of fluidization, heat transfer, tube corrosion and coal feeding. Results from heat transfer, tube corrosion, and coal feeding tests are presented.

scholarly journals Numerical Analysis on Rib-Tubes of Seawater Open Rack Vaporizer With the Spoiler Lever

2017 ◽  
Vol 24 (s2) ◽  
pp. 14-21
Author(s):  
Su Houde ◽  
Yu Shurong ◽  
Fan Jianling ◽  
Wei Xing
Keyword(s):  
Heat Transfer ◽  
Tube Wall ◽  
Small Difference ◽  
Operating Temperature ◽  
Operating Parameter ◽  
Tube Model ◽  
Heat Transfer Tube ◽  
Transfer Tube ◽  
Gasification Efficiency ◽  
Gas Ratio

Abstract In order to explore a more reasonable structure and operating parameter, guide the design and improve the gasification of seawater Open Rack Vaporizer (ORV), Research on the rules of seawater that flows and heat transfer in the ORV tube was studied in this paper. By simplifying the model, heat transfer tube model with spoiler lever was obtained and simulated, the distribution of temperature field, gas ratio, velocity field and press field in rib tube were analyzed, and different inlet velocity of LNG, roughness of the tube wall both effected on the overall gasification, the results shows that the actual gasification efficiency from heat transfer tube is higher than normal, small difference of gas ratio outlet, velocity and temperature are both lower, LNG could be easer gasified at operating temperature between -162°C~+3°C than that between -162°C~+0°C.

Gas hydrate fast nucleation from melting ice and quiescent growth along vertical heat transfer tube

2005 ◽  
Vol 48 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Yingming Xie ◽  
Kaihua Guo ◽  
Deqing Liang ◽  
Shuanshi Fan ◽  
Jianming Gu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Gas Hydrate ◽  
Heat Transfer Tube ◽  
Transfer Tube ◽  
Vertical Heat

CO2 methanation in a bench-scale bubbling fluidized bed reactor using Ni-based catalyst and its exothermic heat transfer analysis

Energy ◽  
2021 ◽  
Vol 214 ◽  
pp. 118895
Author(s):  
Hyungseok Nam ◽  
Jung Hwan Kim ◽  
Hana Kim ◽  
Min Jae Kim ◽  
Sang-Goo Jeon ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Heat Transfer Analysis ◽  
Co2 Methanation ◽  
Bench Scale ◽  
Bubbling Fluidized Bed

scholarly journals Research and Development of Heat Transfer Tube Materials for a Multi-stage Flash Desalination Plant

1976 ◽  
Vol 25 (5) ◽  
pp. 349-362
Author(s):  
Yukio Sakae ◽  
Yukiyasu Watanabe ◽  
Toshio Sasaki ◽  
Hideo Togano
Keyword(s):  
Heat Transfer ◽  
Research And Development ◽  
Heat Transfer Tube ◽  
Desalination Plant ◽  
Multi Stage ◽  
Transfer Tube
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