HEAT TRANSFER ENHANCEMENT DUE TO COLD CAP MOTION FROM BUBBLING IN A WASTE GLASS MELTER

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS
D. Guillen, Alexander W. Abboud
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引用次数: 0

Abstract

In this study, a computational fluid dynamics (CFD) model was developed to model the motion of a solid cold cap in a waste glass melter. Forced convection bubblers at the base of the melter release air into the molten glass, which forms large bubbles that travel upwards to the cold cap and augment heat transfer from the glass to the cold cap. The CFD model employs the Navier- Stokes equations to solve for the fluctuating flowfield using a rigid body motion dynamic fluid body interaction module. This allows for movement of the floating body in response to the bubbling forces calculated at each time step. The heat flux delivered to the cold cap by the convective bubbling is studied as a function of the bubbling rate. Results for the moving cold cap are compared with the computed heat flux trends for a stationary cold cap. The heat flux delivered to the cold cap from the glass is 25% higher for the case with the moving cold cap. The heat flux was found to be proportional to v0.6 as opposed to v0.9 (where v is the normalized bubbling rate) for the stationary cold cap.
在废玻璃熔炼机中冒泡引起的冷帽运动引起的传热增强
在这项研究中,建立了一个计算流体动力学(CFD)模型来模拟废玻璃熔炼机中固体冷帽的运动。熔体底部的强制对流起泡器将空气释放到熔融玻璃中,形成大气泡向上移动到冷帽,增加了玻璃到冷帽的热量传递。CFD模型使用刚体运动动态流体相互作用模块采用Navier- Stokes方程求解波动流场。这允许浮动体的运动,以响应在每个时间步计算的冒泡力。研究了对流冒泡向冷帽传递的热流密度随冒泡速率的变化规律。将移动冷帽的结果与固定冷帽的计算热流密度趋势进行了比较。对于移动冷帽的情况,从玻璃传递到冷帽的热流密度高出25%。对于固定冷帽,热流密度与v0.6成正比,而与v0.9(其中v是标准化的冒泡率)成正比。
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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