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MODELING PHASE CHANGE HEAT TRANSFER OF LIQUID/VAPOR SYSTEMS IN FREE AND POROUS MEDIA

机译:在自由和多孔介质中模拟液体/蒸气系统的相变传热

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Effective Solvent Extraction Incorporating Electromagnetic Heating (ESEIEH) is a relatively new concept that relies on Radio Frequency (RF) heating and solvents to replace steam in current thermal processes for the purpose of extracting bitumen from oil rich sands. The work presented here will further the understanding of the near wellbore flow and phase behavior of the ESEIEH process in order to better predict solvent vaporization dynamics and heat rates delivered to the pay zone. This numerical study details the aspects of phase change of liquid/vapor systems confined in porous media heated by electromagnetic radiation, and approximated by a volumetric heat source term in the energy equation. The objective of this work is to utilize the numerical methodology presented herein to predict liquid penetration depth in a heated isotropic porous matrix to avoid the over-saturation of liquid solvent in the pay zone. Results demonstrate the sensitivity of the liquid solvent penetration depth to the solvent delivery rate and the resulting temperature.
机译:结合电磁加热(ESEIEH)的有效溶剂萃取是一个相对较新的概念,它依靠射频(RF)加热和溶剂来替代当前热处理过程中的蒸汽,目的是从富含油的沙子中萃取沥青。此处介绍的工作将进一步了解ESEIEH工艺的近井眼流动和相态,以便更好地预测溶剂汽化动力学和输送到产层的热速率。这项数值研究详细介绍了受限于电磁辐射加热的多孔介质中的液体/蒸汽系统相变的各个方面,并通过能量方程中的体积热源项进行了近似。这项工作的目的是利用本文介绍的数值方法来预测加热的各向同性多孔基质中的液体渗透深度,以避免在产层中液体溶剂过饱和。结果表明液体溶剂渗透深度对溶剂输送速率和所得温度的敏感性。

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