{"id":648178,"date":"2025-01-07T02:00:59","date_gmt":"2025-01-06T23:00:59","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/new-equation-refines-vapor-pressure-calculations-for-diverse-conditions\/"},"modified":"2025-01-07T02:00:59","modified_gmt":"2025-01-06T23:00:59","slug":"new-equation-refines-vapor-pressure-calculations-for-diverse-conditions","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/new-equation-refines-vapor-pressure-calculations-for-diverse-conditions\/","title":{"rendered":"#New equation refines vapor pressure calculations for diverse conditions"},"content":{"rendered":"
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\n The full range comparison of the error rates for ammonia, butane, toluene and water. Credit: Korea Institute of Civil Engineering and Building Technology<\/a>
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The Korea Institute of Civil Engineering and Building Technology has introduced a vapor pressure equation. It addresses the limitations of the Lee-Kesler method, which has been a widely used method in the field of thermodynamics, offering a versatile and comprehensive solution for vapor pressure calculations across diverse conditions.<\/p>\n

The study is published<\/a> in the journal Chemical Engineering Communications<\/i>.<\/p>\n

The Lee-Kesler method has been a reliable calculation method in chemical process design, particularly for predicting vapor pressure based on material properties. By referring the acentric factor, it accounts for non-ideal behavior and delivers stable, accurate results, even near critical points.<\/p>\n

Its simplicity\u2014requiring only the acentric factor and critical properties\u2014has made it a preferred alternative to Antoine’s equation, which depends on extensive substance-specific temperature data. However, its limitations in temperature range and accuracy at lower temperatures have long posed challenges.<\/p>\n

Dr. Lee Jaiyeop of KICT developed this new equation, which represents a significant improvement, achieving an impressive average error rate of 0.49%, slightly better than the Lee-Kesler method’s 0.50%. In a study involving 76 substances, it outperformed the Lee-Kesler method in 45 cases.<\/p>\n

Most notably, at reduced temperatures below 0.7, the equation demonstrated an average error rate of 0.57%, compared to the Lee-Kesler method’s 0.72%. This enhanced precision at relatively lower temperatures could be particularly valuable for cryogenic and other extreme environments such as Antarctica or the lunar surface.<\/p>\n

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\n Comparison of the developed equation (Sky) and Lee-Kesler method (Peach) for 76 substances. Credit: Korea Institute of Civil Engineering and Building Technology
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A key breakthrough is its extended temperature range. While the Lee-Kesler method is restricted to calculations around a reduced temperature of 0.7, the new equation is app<\/a>licable across a broad range, from 0.25 to 0.95. This flexibility makes it suitable for substances with limited experimental data, addressing the data dependency challenges faced by other methods. Consequently, it provides a more adaptable and efficient computational environment for engineers and researchers.<\/p>\n

The equation has received international recognition as a significant extension of the Antoine and Lee-Kesler methods. Its potential applications span diverse fields, including energy, pharmaceuticals, and environmental monitoring. Its precision and versatility make it a valuable tool for addressing high-pressure and low-temperature challenges in industrial operations.<\/p>\n

Moreover, the equation is designed to integrate seamlessly with IoT-based monitoring systems. This compatibility enables real-time data analysis and process optimization, which are expected to enhance productivity and safety across industries. By bridging theoretical innovation with practical applications, this new approach promises to set a new benchmark in vapor pressure calculations.<\/p>\n

Dr. Lee said, “This research not only sets a new benchmark but also introduces a transformative tool for the chemical engineering community.”<\/p>\n

He mentioned that with its adoption, industries are expected to achieve significant advancements. As its influence grows, this groundbreaking equation is set to leave a lasting mark across various disciplines.<\/p>\n

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More information:<\/strong>
\n\t\t\t\t\t\t\t\t\t\t\t\tJai-Yeop Lee, Derivation of full range vapor pressure equation from an arbitrary point, Chemical Engineering Communications<\/i> (2024). DOI: 10.1080\/00986445.2024.2409171<\/a><\/p>\n<\/div>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\tCitation<\/strong>:
\n\t\t\t\t\t\t\t\t\t\t\t\tNew equation refines vapor pressure calculations for diverse conditions (2025, January 6)
\n\t\t\t\t\t\t\t\t\t\t\t\tretrieved 6 January 2025
\n\t\t\t\t\t\t\t\t\t\t\t\tfrom https:\/\/phys.org\/news<\/a>\/2025-01-equation-refines-vapor-pressure-diverse.html\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n

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