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学者姓名：刘中良
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Abstract ：
针对平板热管均热器内部狭小空间存在着强烈的沸腾与凝结相互作用,以去离子水为工质,可视化实验研究了冷凝面上发生的凝结现象及其对相变腔传热性能的影响。通过分析冷凝面上液滴的形成、长大、汇聚成液膜、滴落,以及气液界面产生气泡随气流运动对冷凝液膜的冲刷作用,揭示了不同热流密度和充液率时相变腔冷凝面传热传质特性对沸腾-凝结共存相变传热影响的内在机理。实验结果表明:受重力影响,水蒸气在冷凝面上凝结有液滴和液膜共存并相互转化的特性,冷凝面热阻在相变腔总热阻中占比65%～88%,适宜的充液率有利于沸腾气泡冲刷冷凝壁面,加快冷凝液的回流,改善冷凝面及相变腔的传热性能;随着热流密度的增大,沸腾过程变得剧烈,冷凝面受沸腾气泡的冲刷频率提高,冷凝液回流速度加快,冷凝面热阻减小,传热性能得到提高。
Keyword ：
凝结与沸腾共存 凝结与沸腾共存 冷凝液回流 冷凝液回流 气泡冲刷 气泡冲刷 充液率 充液率 可视化 可视化 相变腔 相变腔
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| GB/T 7714 | 李艳霞 , 史壮壮 , 刘中良 . 相变腔冷凝现象对沸腾-凝结共存相变传热的影响 [J]. | 北京工业大学学报 , 2024 , (01) : 113-122 . |
| MLA | 李艳霞 等. "相变腔冷凝现象对沸腾-凝结共存相变传热的影响" . | 北京工业大学学报 01 (2024) : 113-122 . |
| APA | 李艳霞 , 史壮壮 , 刘中良 . 相变腔冷凝现象对沸腾-凝结共存相变传热的影响 . | 北京工业大学学报 , 2024 , (01) , 113-122 . |
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Abstract ：
The effects of cold surface temperature, wet air state (temperature and humidity) and original drop size on frost dendrites growth of two neighboring separate frozen water drops of same size under natural convection conditions were investigated by quantitative measurement. It was determined that for different cold plate surface temperature conditions, i.e., the ordinary-low temperature and the cryogenic temperature range, the frost formation mechanism is different. Under the conditions that the air temperature is not too high and absolute humidity is not too excessive, the influence of frozen water drop size on the longest dendrite of frost crystals becomes more and more obvious with the decrease in cold plate temperature. The changes in air temperature and relative humidity both change air absolute humidity, so they have similar effects on the growth of dendrites. However, the effect of wet air state on the growth of frost dendrites is not monotonous, which needs to be considered comprehensively in combination with heat and mass transfer and the existence of heavy phase layer. The thickness of 'the initial continuous frost layer' was measured and it was disclosed that the initial frost layer thickness is 1.7-3.0 times that of the height of the frozen water drop diameter. This value may be possibly used as initial frost layer thickness in heat and mass transfer-based frost layer growth prediction models, at least for ordinary-low temperature conditions.
Keyword ：
initial frost layer thickness initial frost layer thickness dendrite growth dendrite growth frost crystal frost crystal cryogenic cold surface cryogenic cold surface
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| GB/T 7714 | Yu, Fengjiao , Liu, Zhongliang , Li, Yanxia et al. Experimental Study of Frost Crystals Dendrite Growth on Two Neighboring Separate Frozen Water Drops on a Cryogenic Cold Surface under Natural Convection Conditions [J]. | ENERGIES , 2023 , 16 (4) . |
| MLA | Yu, Fengjiao et al. "Experimental Study of Frost Crystals Dendrite Growth on Two Neighboring Separate Frozen Water Drops on a Cryogenic Cold Surface under Natural Convection Conditions" . | ENERGIES 16 . 4 (2023) . |
| APA | Yu, Fengjiao , Liu, Zhongliang , Li, Yanxia , Chen, Yanling , Li, Yi . Experimental Study of Frost Crystals Dendrite Growth on Two Neighboring Separate Frozen Water Drops on a Cryogenic Cold Surface under Natural Convection Conditions . | ENERGIES , 2023 , 16 (4) . |
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Abstract ：
Quantitative measurements were carried out of the dendrite frost crystal growth under natural convection conditions on a frozen water drop sitting on a cold surface whose temperature is as low as-190 degrees C to study the effects of cold surface temperature, wet air state and original water drop size. In order to classify the influences of different cold surface temperature regions, the frost crystal dendrite growth of both ordinary-low and cryogenic cold surface temperatures were investigated. It was found that the cold plate surface temperature has a direct influence on frost formation mechanism. Decreasing the cold surface temperature for ordinary-low cold surface temperatures will enhance and for cryogenic cold surface temperatures will suppress the frost crystal dendritic growth of the frozen water drop. The measurements disclosed that the length of the longest frost crystal dendrite grows almost linearly with time, esp. in the early stage. The effects of the water drop sizes on the longest frost crystal dendrite growth become more and more obvious as the cold surface temperature decreases. The influence of air relative humidity on the frost crystal dendrite growth is something similar to that of air temperature under given conditions, since their change both changes the absolute air humidity. A very peculiar phenomenon, i.e. the influence of wet air state on frost crystal dendrite growth is not monotonous, was observed. These findings are important for understanding and studying the frost formation and growth, especially the initial frost formation period, on low temperature surfaces.
Keyword ：
Cryogenic cold surface Cryogenic cold surface Natural convection Natural convection Dendrite growth Dendrite growth Frost crystal Frost crystal
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| GB/T 7714 | Yu, Fengjiao , Liu, Zhongliang , Li, Yanxia et al. Experimental study of frost crystal dendrite growth on a cryogenic cold surface under natural convection conditions [J]. | INTERNATIONAL JOURNAL OF REFRIGERATION , 2022 , 144 : 305-315 . |
| MLA | Yu, Fengjiao et al. "Experimental study of frost crystal dendrite growth on a cryogenic cold surface under natural convection conditions" . | INTERNATIONAL JOURNAL OF REFRIGERATION 144 (2022) : 305-315 . |
| APA | Yu, Fengjiao , Liu, Zhongliang , Li, Yanxia , Chen, Yanling , Li, Yi . Experimental study of frost crystal dendrite growth on a cryogenic cold surface under natural convection conditions . | INTERNATIONAL JOURNAL OF REFRIGERATION , 2022 , 144 , 305-315 . |
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Abstract ：
A CFD model with chemical reaction kinetic and heat and mass transfer for a monolith reactor is established by COMSOL Multiphysics to investigate the influence of different operating conditions and water on denitrification efficiency for Cu-CHA. At the low temperature range, water has little effect on the denitrification efficiency over the Cu-CHA catalyst while NO conversion is increased by about 30% at the medium temperature. The concentration of O-2 (C-O2) has no significant effect on the performance of Cu-CHA catalyst. The best ratio of NO2 to NOx in feed gases may be 1/2, which improves the denitrification efficiency and the yield of N-2 but it produces relatively little N2O. The optimal ammonia-nitrogen ratio is 1.1, where Cu-CHA catalyst has fairly great denitrification efficiency and low NH3 leakage. Increasing inlet flow velocity and cross area of channels have negative effect on NO conversion, while longer channels and thicker substrate have the opposite effect.
Keyword ：
SCR SCR denitrification denitrification Cu-CHA Cu-CHA numerical study numerical study water resistant water resistant
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| GB/T 7714 | Li, Yanxia , Zhu, Yuwen , Zhang, Ning et al. Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor [J]. | CATALYSTS , 2021 , 11 (8) . |
| MLA | Li, Yanxia et al. "Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor" . | CATALYSTS 11 . 8 (2021) . |
| APA | Li, Yanxia , Zhu, Yuwen , Zhang, Ning , Liu, Zhongliang . Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor . | CATALYSTS , 2021 , 11 (8) . |
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Abstract ：
Flow and heat transfer characteristics of oil-based drilling cuttings in a screw-driving spiral heat exchanger were numerically simulated. The influence of spiral tube rotation speed, Reynolds number of oil-based drilling cuttings, cross-sectional shape on flow and heat transfer characteristics were studied. The results show that with rotation speed increases, the heat transfer coefficient and outlet temperature of oil-based drilling cuttings all increase. In addition, when Reynolds number is less than 250, Nusselt number increases rapidly with the increase of Reynolds number, and Reynolds number has little influence on Nusselt number when it is more than 250. Besides, Nusselt number increases with the increase of curvature ratio di=D. In order to facilitate engineering design, a correlation for heat transfer of oil-based drilling cuttings flowing in the shell side of the heat exchanger is obtained. © 2021, Science Press. All right reserved.
Keyword ：
Infill drilling Infill drilling Reynolds number Reynolds number Heat exchangers Heat exchangers Screws Screws Nusselt number Nusselt number
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| GB/T 7714 | Zhao, Fei , Li, Yan-Xia , Liu, Zhong-Liang et al. Flow and Heat Transfer Characteristics of Oil-based Drilling Cuttings in Screw-driving Spiral Heat Exchanger [J]. | Journal of Engineering Thermophysics , 2021 , 42 (4) : 959-965 . |
| MLA | Zhao, Fei et al. "Flow and Heat Transfer Characteristics of Oil-based Drilling Cuttings in Screw-driving Spiral Heat Exchanger" . | Journal of Engineering Thermophysics 42 . 4 (2021) : 959-965 . |
| APA | Zhao, Fei , Li, Yan-Xia , Liu, Zhong-Liang , Mi, Fu-Lin , Gao, Li-Qing , Li, Qing-Fang et al. Flow and Heat Transfer Characteristics of Oil-based Drilling Cuttings in Screw-driving Spiral Heat Exchanger . | Journal of Engineering Thermophysics , 2021 , 42 (4) , 959-965 . |
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Abstract ：
为快速掌握区域内全部水泥企业的碳排放情况,在部分企业实际生产数据未知时,也能建立其生产碳排放清单,文中基于熟料生产特征,构建了可根据设备设计产能和运行时长两种参数来核算企业CO_2排放的数值模型。以京津冀地区59条典型水泥熟料生产线的生产数据作为统计样本,借助Eviews对生产线的实际产能、熟料烧成煤耗与设计产能间的关系进行回归分析,并引入了生产时间修正系数,完成了CO_2核算模型的建立。将其应用到京津冀地区全部106条水泥熟料生产线中,得出2018年度京津冀地区水泥熟料总产量,该核算值与数字水泥网发布的统计数据之间的相对误差均值为7.81%。通过核算,CO_2直接排放系数为0.93 t CO...
Keyword ：
实际产能 实际产能 水泥熟料烧成煤耗 水泥熟料烧成煤耗 CO_2排放量核算 CO_2排放量核算 生产时长 生产时长 水泥熟料生产企业 水泥熟料生产企业 CO_2排放清单 CO_2排放清单
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| GB/T 7714 | 杨楠 , 李艳霞 , 赵盟 et al. 水泥熟料生产企业CO_2直接排放核算模型的建立 [J]. | 气候变化研究进展 , 2021 , 17 (01) : 79-87 . |
| MLA | 杨楠 et al. "水泥熟料生产企业CO_2直接排放核算模型的建立" . | 气候变化研究进展 17 . 01 (2021) : 79-87 . |
| APA | 杨楠 , 李艳霞 , 赵盟 , 吕晨 , 刘中良 , 陈莎 . 水泥熟料生产企业CO_2直接排放核算模型的建立 . | 气候变化研究进展 , 2021 , 17 (01) , 79-87 . |
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Abstract ：
对油基钻屑在螺纹推进式换热器内的流动换热过程进行了数值模拟,研究了螺杆转速、油基钻屑雷诺数Re和螺纹截面形状对流动换热的影响。结果表明:随着螺杆转速增加,传热系数、油基钻屑出口温度均增大;同时发现,当雷诺数Re<250时,壳侧Nusselt数随雷诺数Re增大而迅速增大,此后雷诺数对Nusselt数影响较小;Nusselt数随曲率比d_i/D增大而增大。为方便工程设计,利用数值结果给出了油基钻屑的流动换热关系式。
Keyword ：
螺纹推进式 螺纹推进式 截面形状 截面形状 数值模拟 数值模拟 油基钻屑 油基钻屑 流动换热 流动换热
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| GB/T 7714 | 赵飞 , 李艳霞 , 刘中良 et al. 油基钻屑螺纹推进式换热器流动传热特性 [J]. | 工程热物理学报 , 2021 , 42 (04) : 959-965 . |
| MLA | 赵飞 et al. "油基钻屑螺纹推进式换热器流动传热特性" . | 工程热物理学报 42 . 04 (2021) : 959-965 . |
| APA | 赵飞 , 李艳霞 , 刘中良 , 密夫林 , 高立青 , 李清方 et al. 油基钻屑螺纹推进式换热器流动传热特性 . | 工程热物理学报 , 2021 , 42 (04) , 959-965 . |
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Abstract ：
水泥熟料生产企业CO2直接排放核算模型的建立
Keyword ：
CO2排放量核算 CO2排放量核算 实际产能 实际产能 生产时长 生产时长 CO2排放清单 CO2排放清单 水泥熟料生产企业 水泥熟料生产企业 水泥熟料烧成煤耗 水泥熟料烧成煤耗
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| GB/T 7714 | 杨楠 , 李艳霞 , 赵盟 et al. 水泥熟料生产企业CO2直接排放核算模型的建立 [J]. | 杨楠 , 2021 , 17 (1) : 79-87 . |
| MLA | 杨楠 et al. "水泥熟料生产企业CO2直接排放核算模型的建立" . | 杨楠 17 . 1 (2021) : 79-87 . |
| APA | 杨楠 , 李艳霞 , 赵盟 , 吕晨 , 刘中良 , 陈莎 et al. 水泥熟料生产企业CO2直接排放核算模型的建立 . | 杨楠 , 2021 , 17 (1) , 79-87 . |
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Abstract ：
利用化学及电化学方法将非贵金属催化剂石墨烯(rGO)和纳米MnO2依次负载到三维多孔不锈钢纤维毡(Stainless steel fiber felt,SSFF)集电体上制备微生物燃料电池(Microbial fuel cell,MFC)空气阴极.在增大空气阴极活化面积的同时有效减小接触阻抗.通过物理和电化学方式测试表征其形貌、氧还原特性.在MFC中的运行结果表明,负载5 mL还原性氧化石墨烯再浸渍生长MnO2的不锈钢纤维毡(rGO@MnO2-SSFF)空气阴极的最大功率密度(524.34 mW/m2)是不锈钢纤维毡阴极(58.21 mW/m2)的9倍.经过复合催化剂rGO@MnO2修饰之后的不锈钢纤维毡空气阴极可以应用于MFC并大幅改良SSFF空气阴极的氧还原催化性能.
Keyword ：
不锈钢纤维毡 不锈钢纤维毡 纳米二氧化锰 纳米二氧化锰 氧化石墨烯 氧化石墨烯 空气阴极 空气阴极 微生物燃料电池 微生物燃料电池
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| GB/T 7714 | 陈稳稳 , 牛恒 , 刘中良 . 一体式无粘结剂rGO@MnO2不锈钢纤维毡空气阴极的制备 [J]. | 现代化工 , 2021 , 41 (3) : 88-91 . |
| MLA | 陈稳稳 et al. "一体式无粘结剂rGO@MnO2不锈钢纤维毡空气阴极的制备" . | 现代化工 41 . 3 (2021) : 88-91 . |
| APA | 陈稳稳 , 牛恒 , 刘中良 . 一体式无粘结剂rGO@MnO2不锈钢纤维毡空气阴极的制备 . | 现代化工 , 2021 , 41 (3) , 88-91 . |
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Abstract ：
在自然对流条件下对竖直放置的透明超疏水表面和无修饰玻璃表面可视化结霜研究。结果表明,纳米二氧化硅在表面形成了几百纳米的纳米聚集团,使得表面凹凸不平,这种结构与荷叶表面的均有类似的微纳粗糙结构,制备出的表面最大接触角为153.1°,表面具有超疏水特性;在不同粒径下研究发现随着纳米二氧化硅粒径的降低其接触角是逐渐增大的;涂层会对表面透射率产生影响,15nm下的表面透射率仅降低8.86%;粒径越小制作出的表面能够更有效的抑制霜层的增长,15nm的表面抑霜时间可延长至770s,相比没有涂层的表面延长了165.5%。
Keyword ：
实验 实验 疏水性 疏水性 纳米二氧化硅 纳米二氧化硅
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| GB/T 7714 | 范鹏艳 , 刘中良 , 李艳霞 . 基于纳米SiO_2的透明疏水表面制备与抑霜性能研究 [J]. | 制冷与空调(四川) , 2021 , 35 (03) : 312-320 . |
| MLA | 范鹏艳 et al. "基于纳米SiO_2的透明疏水表面制备与抑霜性能研究" . | 制冷与空调(四川) 35 . 03 (2021) : 312-320 . |
| APA | 范鹏艳 , 刘中良 , 李艳霞 . 基于纳米SiO_2的透明疏水表面制备与抑霜性能研究 . | 制冷与空调(四川) , 2021 , 35 (03) , 312-320 . |
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