Within the framework of strategies to prevent global warming, the safety of CO transportation pipelines requires thorough hazard analysis. Accidental leakage during long-distance CO transport, influenced by the size of the leakage opening, typically occurs under constant pressure conditions in the CCUS process. This paper introduces an innovative scaled experimental apparatus with an elliptical orifice, designed to simulate leakage due to free rupture in pipelines. The goal is to understand the risk characteristics of constant-pressure leakage in transportation pipelines. The results indicate that during leakage, the pressure drop in the source CO pipeline is less than 0.3013 MPa/s, which can be considered constant pressure leakage. The Mach disk size has a linear relationship with the elliptical leakage orifice . The scaled experiments also show that temperatures can drop to as low as −78°C, indicating significant low-temperature risks. This scaling experiment provides a new approach for predicting and mitigating diffusion risks in long-distance pipeline transportation by examining the relationship between pipeline length and orifice diameter. The research data and results contribute to a deeper understanding of the safety aspects of long-distance transportation of CO under constant pressure leakage conditions, providing a basis for risk assessment of leakage accidents and environmental protection measures.

中文翻译：

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CCUS工艺恒压输送管道CO2意外泄漏扩散风险的缩比实验研究


在防止全球变暖的战略框架内，二氧化碳运输管道的安全需要进行彻底的危害分析。长距离二氧化碳运输过程中的意外泄漏，受泄漏口尺寸的影响，通常发生在 CCUS 工艺的恒压条件下。本文介绍了一种带有椭圆孔的创新型规模实验装置，旨在模拟管道自由破裂引起的泄漏。目的是了解输送管道恒压泄漏的风险特征。结果表明，泄漏过程中CO源管道内压降小于0.3013 MPa/s，可以认为是恒压泄漏。马赫盘尺寸与椭圆泄漏孔口呈线性关系。规模化实验还表明，温度可降至-78°C，表明存在显着的低温风险。该缩放实验通过检查管道长度和孔口直径之间的关系，为预测和减轻长距离管道运输中的扩散风险提供了一种新方法。研究数据和结果有助于更深入地了解恒压泄漏条件下CO长距离运输的安全问题，为泄漏事故风险评估和环境保护措施提供依据。