Liu Xiaomin, Wang Xing, Xi Guang
a Department of Fluid Machinery and Engineering, School of Energy and Power Engineering , Xi'an Jiaotong University , Shaanxi , China.
J Occup Environ Hyg. 2014;11(3):186-99. doi: 10.1080/15459624.2013.848036.
Conventional range hoods cannot effectively prevent the oil fumes containing cooking-induced harmful material from escaping into the kitchen Air curtains and guide plates have been used in range hoods to reduce the escape of airborne emissions and heat, thereby improving the kitchen environment and the cook's degree of comfort. In this article, numerical simulations are used to study the effects of the jet velocity of an air curtain, the jet angle of the air curtain, the width of the jet slot, the area of the guide plate, and the exhaust rate of the range hood on the perceived temperature, the perceived concentration of oil fumes, the release temperature of oil fumes, and the concentration of escaped oil fumes in a kitchen. The orthogonal experiment results show that the exhaust rate of the range hood is the main factor influencing the fumes concentration and the temperature distribution in the kitchen. For the range hood examined in the present study, the optimum values of the exhaust rate, the jet velocity of the air curtain, the jet angle of the air curtain, the width of the jet slot, and the area of the guide plate are 10.5 m(3)/min, 1.5 m/s, -5°, 4 mm, and 0.22 m(2), respectively, based on the results of the parametric study. In addition, the velocity field, temperature field, and oil fumes concentration field in the kitchen using the proposed range hood with the air curtain and guide plate are analyzed for those parameters. The study's results provide significant information needed for improving the kitchen environment.
传统的抽油烟机无法有效防止含有烹饪产生有害物质的油烟逸散到厨房中。气幕和导板已被应用于抽油烟机，以减少空气传播污染物和热量的逸出，从而改善厨房环境和厨师的舒适度。在本文中，通过数值模拟研究了气幕的喷射速度、气幕的喷射角度、喷射槽宽度、导板面积以及抽油烟机的排气速率对厨房中感知温度、油烟感知浓度、油烟排放温度和逸出油烟浓度的影响。正交试验结果表明，抽油烟机的排气速率是影响厨房中油烟浓度和温度分布的主要因素。基于参数研究的结果，对于本研究中所考察的抽油烟机，排气速率、气幕喷射速度、气幕喷射角度、喷射槽宽度和导板面积的最佳值分别为10.5立方米/分钟、1.5米/秒、-5°、4毫米和0.22平方米。此外，针对这些参数分析了使用带有气幕和导板的抽油烟机的厨房中的速度场、温度场和油烟浓度场。该研究结果为改善厨房环境提供了重要信息。
