制冷学报Issue(1)：24-29,6.DOI:10.3969/j.issn.0253-4339.2013.01.024
含油制冷剂在泡沫金属圆管内流动沸腾的换热特性
Heat Transfer Characteristics of Refrigerant-oil Mixture Flow Boiling inside Circular Tubes Filled with Metal Foam
摘要
Abstract
The heat transfer characteristics of refrigerant-oil mixture flow boiling inside circular tubes filled with metal foam were experimentally investigated. The metal foams are 5 ppi / 95% porosity and 10 ppi / 95% porosity copper foams. The experimental conditions include saturation pressure of 995 kPa, mass flux from 10 to 30 kg/(m2.s), heat flux from 3.1 to 9.3 kW/m2, inlet vapor quality from 0.175 to 0.775, and oil concentration from 0% to 5%. The experimental results show that: metal foam enhances the flow boiling heat transfer coefficient of refrigerant by a maximum of 185% at oil free conditions, while the enhancement effect of metal foam is weaken at oil presence conditions; the flow boiling heat transfer coefficient for the circular tube filled with high ppi metal foam is higher than that for the tube filled with low ppi ones. A new correlation of heat transfer coefficient for refrigerant-oil mixture flow boiling inside circular tubes filled with metal foam is developed based on the flow pattern, and it can agree with 98% of the experimental data within a deviation of ±30%.关键词
流动沸腾/换热特性/泡沫金属/制冷剂/润滑油Key words
flow boiling/heat transfer characteristics/metal foam/refrigerant/oil分类
能源科技引用本文复制引用
胡海涛,朱禹,丁国良,孙硕..含油制冷剂在泡沫金属圆管内流动沸腾的换热特性[J].制冷学报,2013,(1):24-29,6.基金项目
国家自然科学基金(50906048)资助项目.(The project was supported by the National Natural Science Foundation of China (No.50906048) （50906048）
