Numerical Simulation of Thermal Flow Characteristics in Plasma Reactor for Rotten Citrus Fruits Drying

IF 1.2 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Hye-Young Ko, Dong H. Shin, Jeong-Hwan Oh, Hyeokjun Kang, Daeun Choi, S. Choi
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引用次数: 0

Abstract

Rotten citrus fruits, which spread odor gas during shipping season, pose a severe problem in Jeju Island, Republic of Korea. The existing methods for food waste management such as composting using electro-drying and microorganisms have a high electricity cost and require a precise temperature control, respectively. Herein, we conducted a basic numerical study on a plasma reactor using microwave plasma and liquefied petroleum gas as a combined heat source for drying and composting rotten citrus fruits. To determine the design and operating conditions of the plasma reactor, the thermal flow characteristics inside the reactor were analyzed using a computational fluid dynamics code in ANSYS-fluent. In particular, the temperature distribution in the plasma reactor was simulated at different air flow rates of the centrifugal fan. The numerical simulation accuracy was evaluated by comparing the numerical results and actual experimental data. The temperature of the reactor decreased with the increase in the air flow rate of the centrifugal fan. Above 10 m/s, the temperature of the drying chamber and the exhaust gas remained almost constant at 507 K. In the present work, the calculated temperature shows a difference 1.13 % from the measured temperature at the combustion chamber. were caused by the latent heat of water vaporization. The numerical simulation, however, show the correct prediction in the combustion chamber where the heat is suppled and provides reasonable trend of the temperature distribution according to the fresh air supply in the centrifugal fan. Using the simulation results of this study, the oper- ating condition of the plasma reactor as a treatment facility for rotten citrus fruits in Jeju Island are derived and it can be used as basic data for research on food waste disposal facilities.
柑桔腐烂果实干燥等离子体反应器热流特性数值模拟
在韩国济州岛,在航运季节,腐烂的柑橘会散发出难闻的气体,这是一个严重的问题。现有的食物垃圾处理方法,如电干燥堆肥和微生物堆肥,分别需要很高的电力成本和精确的温度控制。本文对以微波等离子体和液化石油气为复合热源的等离子体反应器进行了柑桔腐果干燥和堆肥的基础数值研究。为了确定等离子体反应器的设计和运行条件,利用ANSYS-fluent计算流体动力学软件对反应器内部的热流特性进行了分析。特别模拟了离心风机不同风量下等离子体反应器内的温度分布。通过数值结果与实际实验数据的比较,对数值模拟的精度进行了评价。反应器温度随离心风机风量的增大而降低。在10m /s以上,干燥室温度和废气温度基本保持在507 K不变。在本工作中,计算温度与燃烧室实测温度相差1.13%。都是由水的蒸发潜热引起的。数值模拟结果表明,在供热燃烧室内的预测是正确的,并根据离心风机的新风送风情况,给出了合理的温度分布趋势。利用本研究的模拟结果,推导出济州岛柑桔腐烂处理设施等离子体反应器的运行工况,可作为研究餐厨垃圾处理设施的基础数据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
1.40
自引率
12.50%
发文量
27
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