进口温压和管道传热系数对超临界CO2管输特性影响研究

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Abstract：This paper builds a one-dimensional pipeline flow model of supercritical CO2 based on the continuity equation，momentum equationandeergquationndsdiestheifluenceofteinettmperatureandpressureandeattransfercofcientofpielines on supercritical CO 2 pipeline transportation characteristics.The results show that as the inlet temperature increases，the drops in temperatureandpressre，andthesafetytrasportationistancealongtepipelinesallgrow.Aditionalythedcreaseamplideof temperatureandpressureincreasesanddecreasesrespectivelywithteisingiletpressure.Tere isanotialvalueof iletpressure for the safe transportation distance，and too high pressure willaccelerate the transformation of CO 2 to the subcritical state.As the heat transfercoeffcientof pipelinesincreases，alongthepipelines，thedecreaseamplitudeof temperatureandpressreincreasesand decreasesrespectively，with thesafe transportation distance showing atendencytodecrease.Fora 2OO kmsupercritical CO2 pipeline， the inlet temperature of more than 65 ， inlet pressure of 10MPa ，andheat transfer coefficien ⩽1.0 W（m²·K） can ensure that the safe operation of CO2 is in the supereritical state throughout the entire process.

Keywords： supercritical CO2 ； simulation; pipeline transportation; transportation distance

随着全球能源结构的加速转型和“双碳”战略的持续推进，我国的碳捕集、利用与封存技术（Carbon Capture，UtilizationandStorage，CCUS）迎来快速发展机遇。（剩余8446字）