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首页> 外文期刊>International Journal of Heat and Mass Transfer >In-tube convective heat transfer characteristics of CO_2 mixtures in a pipeline
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In-tube convective heat transfer characteristics of CO_2 mixtures in a pipeline

机译：管道中CO_2混合物的管内对流传热特性

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摘要

In the Carbon Capture, Transportation & Storage (CCS) process, CO2is captured with impurities such as N2, CH4and Ar and is transported under a supercritical state. In this study, the characteristics of in-tube convective heat transfer of CO2mixtures such as CO2 + N2, CO2 + CH4and CO2 + Ar were experimentally investigated under the land transportation conditions of the CCS process. The test tube was made of a cooper tube buried in a PVC (Polyvinyl Chloride) pipe which was compactly filled with sand, which simulated the land CO2transportation. Mass flux was changed by 200, 400 and 600 kg m−2 s−1, and operational pressures were 80, 90, and 100 bar. Operational temperatures ranged from 25 to 55 °C. The heat transfer coefficient of the CO2mixtures dominantly followed the trends of pure CO2; however, they were decided by the type and quantity of the impurity. When the CO2mole fraction was changed from 1.00 to 0.95, the maximum heat transfer coefficient at the pseudo-critical temperature of CO2 + N2and CO2 + CH4decreased by 4389 W·m−2 K−1and 2770 W·m−2 K−1, respectively. As the mass flux increased, the heat transfer coefficient increased in all of the CO2mixtures.
机译：在碳捕集，运输和封存（CCS）过程中，CO2被N2，CH4和Ar等杂质捕集并在超临界状态下运输。在这项研究中，在CCS工艺的陆路运输条件下，通过实验研究了CO2混合物（如CO2 ++ N2，CO2 ++ CH4和CO2 ++ Ar）的管内对流换热特性。试管由铜管埋入PVC（聚氯乙烯）管中制成，该管密实地填充了沙子，模拟了陆地CO2的运输。质量通量改变了200、400和600 kg m-2·s-1，操作压力分别为80、90和100 bar。工作温度范围为25至55C。二氧化碳混合物的传热系数主要遵循纯二氧化碳的趋势。但是，它们是由杂质的种类和数量决定的。当CO2摩尔分数从1.00变为0.95时，在伪临界温度下，CO2 ++ N2和CO2 ++ CH4的最大传热系数分别降低了4389 W·m-2 K-1和2770 W·m-2 K-1。 。随着质量通量的增加，所有CO2混合物的传热系数均增加。

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