Experimental investigation of the pressure drop of CO2 flow at supercritical pressures in a heated 4 mm smooth pipe with different orientations

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2024-09-18 DOI:10.1016/j.supflu.2024.106407

Konstantinos Theologou, Rainer Mertz, Jörg Starflinger

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Abstract

The application of supercritical fluids as an alternative heat transfer medium in thermal processes is becoming increasingly important, whereby the understanding of their pressure drop characteristics is essential for the process and component design. With a total of 96 experiments, this publication shows a systematic analysis of the pressure drop of CO₂ flow at supercritical pressures in a heated smooth pipe with an inner diameter of 4 mm, at a pressure of 7.75 MPa, mass fluxes up to 2000 kg/m²s and heat fluxes up to 235 kW/m². The hydrostatic pressure drop accounts for between 4 % and 24 % of the total pressure drop and the pressure drop due to flow acceleration for between 12 % and 30 %, with the frictional pressure drop accounting for the largest percentage. It was found that the Filonenko correlation can predict the pipe friction pressure drop in the investigated parameter range with a mean absolute deviation of 7 %.

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超临界压力下二氧化碳流在不同方向的 4 毫米光滑加热管中的压降实验研究

超临界流体作为一种替代传热介质在热工过程中的应用正变得越来越重要，因此了解其压降特性对于工艺和部件设计至关重要。本出版物共进行了 96 次实验，系统分析了内径为 4 毫米、压力为 7.75 兆帕、质量流量高达 2000 千克/平方米、热流量高达 235 千瓦/平方米的加热光滑管道中超临界压力下的二氧化碳流压降。静水压降占总压降的 4% 至 24%，流动加速度造成的压降占 12% 至 30%，其中摩擦压降所占比例最大。研究发现，Filonenko 相关性可以预测调查参数范围内的管道摩擦压降，平均绝对偏差为 7%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.