Numerical modeling and analytical modeling of cryogenic carbon capture in a de-sublimating heat exchanger

Cryogenic Engineering Conference 2017

材料科学;物理学

Yu, Zhitao^1 ; Miller, Franklin^1 ; Pfotenhauer, John M.^1

Mechanical Engineering, UW-Madison, Madison

WI

53706, United States^1

关键词: Analytic modeling;    CO2 capture;    Dimensionless variables;    Engineering equation solvers;    Heat and mass transfer process;    Mass flow rate;    Numerical integrations;    Outlet temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012032/pdf
DOI  :  10.1088/1757-899X/278/1/012032

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Both a numerical and analytical model of the heat and mass transfer processes in a CO2, N2 mixture gas de-sublimating cross-flow finned duct heat exchanger system is developed to predict the heat transferred from a mixture gas to liquid nitrogen and the de-sublimating rate of CO2 in the mixture gas. The mixture gas outlet temperature, liquid nitrogen outlet temperature, CO2 mole fraction, temperature distribution and de-sublimating rate of CO2 through the whole heat exchanger was computed using both the numerical and analytic model. The numerical model is built using EES [1] (engineering equation solver). According to the simulation, a cross-flow finned duct heat exchanger can be designed and fabricated to validate the models. The performance of the heat exchanger is evaluated as functions of dimensionless variables, such as the ratio of the mass flow rate of liquid nitrogen to the mass flow rate of inlet flue gas.