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Three-Dimensional Numerical Simulation of Ice Crystal Melting in Jet Engine; 发动机内冰晶融化过程的三维数值模拟研究
Authors: ZHU Pengfei1, ZHANG Jiachen1, HAN Bingbing2 et al.
Institution:1. School of Power and Energy, Northwestern Polytechnical University, Xi’an 710129, China
Keywords:ice crystals, three-dimensional simulation, melting process, liquid fraction
Volume 28, Issue 5: 984-992, 2019 | PDF
Published: Sept. 5, 2019
Abstract: A method was presented for calculating the melting rate of ice crystals in different axial positions in a compressor. The volume of fluid model and enthalpy-porosity model were used to simulate the...
Performance Assessment of Air-Cooled Steam Condenser with Guide Vane Cascade; 加装导流叶栅对空冷凝气器性能的影响
Authors: ZHANG Xuelei*, LI Yunpeng, CHEN Haiping
Institution:School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Keywords:air-cooled steam condenser, ambient wind, guide vane cascade, heat transfer
Volume 28, Issue 5: 993-1003, 2019 | PDF
Published: Sept. 5, 2019
Abstract: Ambient wind has an unfavourable impact on air-cooled steam condenser (ACSC) performance. A new measure to improve ACSC performance is proposed by setting a diffusion type guide vane cascade beneat...
Study on Working Pairs of Sorption Type Air Conditioner for Electric Vehicles under Different Temperature Zones; 不同温区下电动车吸附式空调工质对的研究
Authors: AN Guoliang, WANG Liwei*, WANG Zixuan et al.
Institution:Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China
Keywords:electric vehicle, automobile air conditioning, solid sorption, energy density, continue voyage course
Volume 28, Issue 5: 1001-1014, 2019 | PDF
Published: Sept. 5, 2019
Abstract: The air conditioning (AC) system of electric vehicles (EVs) consumes a large part of electricity of on-board batteries and influences the continue voyage course seriously. The feasibility of sorpti...
Experimental Study on Performance of a Closed Wet Cooling Tower for Air Wet-Bulb Temperature near 0°C; 近0℃湿球温度条件下闭式冷却塔的性能实验研究
Authors: ZHOU Yasu, ZHANG Pan, ZHAO Jingde* et al.
Institution:College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
Keywords:closed wet cooling tower, performance of cooling tower, low air wet-bulb temperature, rated operating parameters, evaluation index
Volume 28, Issue 5: 1015-1023, 2019 | PDF
Published: Sept. 5, 2019
Abstract: Closed wet cooling towers (CWCTs) are used widely because of their better water quality and smaller water consumption. However, the operating parameters shown in the technical documents are only fo...
Thermodynamic Analysis of a Modified Ejector-Expansion Refrigeration Cycle with Hot Vapor Bypass 热气旁通喷射器膨胀制冷循环的热力学分析
Authors: LI Yunxiang, YU Jianlin*
Institution:Department of Refrigeration & Cryogenic Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Keywords:compressor pressure ratio, discharge temperature, ejector, refrigeration cycle, vapor bypass
Volume 28, Issue 4: 695-704, 2019 | PDF
Published: July 5, 2019
Abstract: In this study, a modified ejector-expansion refrigeration cycle (MERC) is proposed for applications in small refrigeration units. A vapor bypass circuit is introduced into the standard ejector expa...
Analyses of an Improved Double-Absorber Absorption Refrigeration System at Low Temperatures 改进双吸收器吸收制冷系统低温性能理论分析
Authors: HE Yijian, CHEN Guangming*
Institution:Key Laboratory of Refrigeration and Cryogenics Technology of Zhejiang Province; Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China
Keywords:absorption refrigeration, auto-cascade refrigeration, low refrigeration temperature, double-absorber
Volume 28, Issue 4: 705-713, 2019 | PDF
Published: July 5, 2019
Abstract: An auto-cascade absorption refrigeration (ACAR) system could achieve a −60°C refrigeration temperature by low-grade heat. For an ACAR system, its performance is mainly affected by energy and mass c...
Investigation on Precooling Effects of 4 K Stirling-Type Pulse Tube Cryocoolers;4K温区斯特林型脉管制冷机预冷效应研究
Authors: CAO Qiang*, LI Zimu, LUAN Mingkai et al.
Institution:Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Tongji University, Shanghai 201804, China
Keywords:stirling-type pulse tube cryocooler, precooling effects, liquid-helium temperatures
Volume 28, Issue 4: 714-726, 2019 | PDF
Published: July 5, 2019
Abstract: Stirling-type pulse tube cryocoolers (SPTCs) working at liquid-helium temperatures are appealing in space applications because of their promising advantages such as high reliability, compactness, e...
Experimental Investigation on Ejector Performance Using R134a as Refrigerant; 以R134a为工质的喷射式制冷系统中喷射器性能实验研究
Authors: DAI Zhengshu*, YU Bo*, LIU Pengpeng et al.
Institution:School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Keywords:ejector performance, refrigeration, R134a, experiment
Volume 28, Issue 4: 727-735, 2019 | PDF
Published: July 5, 2019
Abstract: Ejector refrigeration has the advantage of low capital cost, simple design, reliable operation, long lifespan and almost no maintenance. The only weakness is the low efficiency and its intolerance ...