Experimental study of heat transfer and pressure drop characteristics of two-phase mixed hydrocarbon refrigerants flow boiling in shell side of spiral wound heat exchanger

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Hu, Haitao^1 ; Ding, Chao^1 ; Ding, Guoliang^1 ; Chen, Jie^2 ; Mi, Xiaoguang^2 ; Yu, Sicong^2

Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai

200240, China^1

RandD Center, CNOOC GasandPower Group, Beijing

100007, China^2

关键词: Heat transfer and pressure drop characteristics;    Heat transfer coefficient (HTC);    Mixed hydrocarbons;    Mixed refrigerants;    Molar fractions;    Propane mixtures;    Spiral wound;    Vapor quality;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012011/pdf
DOI  :  10.1088/1757-899X/502/1/012011

来源: IOP

【 摘 要 】

The heat transfer and pressure drop characteristics of ethane/propane mixed hydrocarbon refrigerants flow boiling in shell side of spiral wound heat exchanger (SWHE) were investigated experimentally, and the ethane molar fractions of the mixed refrigerants cover 0%∼60%. The results show that, as the vapor quality increases, the heat transfer coefficient (HTC) initially increases and then decreases sharply, representing a maximum value at vapor quality of 0.6∼0.8; under mass flux of 40 kg m-2s-1 and heat flux of 6 kW m-2, as the ethane molar fraction increases from 0% to 60%, the HTC decreases maximally by 15% at vapor quality smaller than 0.7, while it increases maximally by 24% at vapor quality larger than 0.7. As the vapor quality is smaller than 0.4, the pressure drop of ethane and propane mixtures are lower maximumly by 17% than that of pure propane; as the vapor quality is larger than 0.6, the pressure drop of ethane and propane mixtures are higher maximumly by 41% than that of pure propane at the same working conditions.