ПІДВИЩЕННЯ ККД ТАРІЛОК В КОЛОННИХ МАСООБМІННИХ АПАРАТАХ
     Technological calculations of the column mass–exchange apparatus assume instantaneous transfer of volatile components of vapour and liquid phases, without considering the residence time the liquid on the trays. There is a threshold below which...
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| Datum: | 2026 |
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| Format: | Artikel |
| Sprache: | Ukrainisch |
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Institute of Engineering Thermophysics of NAS of Ukraine
2026
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| Online Zugang: | https://ihe.nas.gov.ua/index.php/journal/article/view/660 |
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| Назва журналу: | Thermophysics and Thermal Power Engineering |
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Thermophysics and Thermal Power Engineering| _version_ | 1863039819911790592 |
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| author | Bulii, Yu.V. Obodovych, O.M. Bondar, M.V. Sydorenko, V. V. |
| author_facet | Bulii, Yu.V. Obodovych, O.M. Bondar, M.V. Sydorenko, V. V. |
| author_sort | Bulii, Yu.V. |
| baseUrl_str | https://ihe.nas.gov.ua/index.php/journal/oai |
| collection | OJS |
| datestamp_date | 2026-04-20T07:34:21Z |
| description |      Technological calculations of the column mass–exchange apparatus assume instantaneous transfer of volatile components of vapour and liquid phases, without considering the residence time the liquid on the trays. There is a threshold below which the contact time between the phases is insufficient to reach equilibrium, and as a result, the efficiency of commonly used tray types does not exceed 0.4-0.6.
    The aim of the work was to study the phase equilibrium between liquid and vapour in the ethanol-water system under subatmospheric pressure; to select appropriate methods for thermodynamic thermodynamic validation of experimental data; to develop approaches for modeling mass transfer between liquid and vapour in cyclic column apparatuses in order to increase  tray efficiency; and to evaluate their effectiveness in processing of ethanol–containing fractions under industrial conditions.
      Research methods included analytical, computational, physicochemical and chromatographic techniques using instruments and methodologies applied in the production of rectified ethanol. The custom-designed experimental apparatus was developed, which allowed to increase the accuracy measurements and reduced the time required to achieve phase equilibrium to 30–40 min. Experimental data on phase equilibrium in the ethanol-water system were obtained in the pressure range of 103 to 50.6 kPa specifically in the low ethanol concentration region (below 3.0 mоl. %), which corresponds to the operation conditions in the lower sections of distillation and rectification columns. Based on the experimental data, phase equilibrium modeling was performed for the specified pressure. The Tsuboko-Katayama equation was used for modeling. Thermodynamic validation of the results demonstrated a satisfactory level of agreement between calculated and experimental data. Phase equilibrium curves were constructed, the relationship between ethanol evaporation coefficients and pressure was established, and the inversion of equilibrium curves was identified.
       Mass transfer methods between liquid and vapor under controlled cycles of liquid holdup and overflow have been developed, along with designs of mass-exchange apparatus for their implementation. The hydrodynamic operating modes of trays under cyclic conditions have been determined. Experimental results have shown that the extending the contact time between phases on the trays to 30-60 seconds significantly increases the efficiency and reduces steam consumption up to 40%. |
| doi_str_mv | 10.31472/ttpe.1.2026.4 |
| first_indexed | 2026-04-17T01:00:15Z |
| format | Article |
| id | oai:ojs2.ihenasgovua.s43.yourdomain.com.ua:article-660 |
| institution | Thermophysics and Thermal Power Engineering |
| keywords_txt_mv | keywords |
| language | Ukrainian |
| last_indexed | 2026-04-21T01:00:26Z |
| publishDate | 2026 |
| publisher | Institute of Engineering Thermophysics of NAS of Ukraine |
| record_format | ojs |
| spelling | oai:ojs2.ihenasgovua.s43.yourdomain.com.ua:article-6602026-04-20T07:34:21Z ENCHANCEMENT OF TRAY EFFICIENCY IN COLUMN MASS-EXCHANGE APPARATUS ПІДВИЩЕННЯ ККД ТАРІЛОК В КОЛОННИХ МАСООБМІННИХ АПАРАТАХ Bulii, Yu.V. Obodovych, O.M. Bondar, M.V. Sydorenko, V. V.      Technological calculations of the column mass–exchange apparatus assume instantaneous transfer of volatile components of vapour and liquid phases, without considering the residence time the liquid on the trays. There is a threshold below which the contact time between the phases is insufficient to reach equilibrium, and as a result, the efficiency of commonly used tray types does not exceed 0.4-0.6.     The aim of the work was to study the phase equilibrium between liquid and vapour in the ethanol-water system under subatmospheric pressure; to select appropriate methods for thermodynamic thermodynamic validation of experimental data; to develop approaches for modeling mass transfer between liquid and vapour in cyclic column apparatuses in order to increase  tray efficiency; and to evaluate their effectiveness in processing of ethanol–containing fractions under industrial conditions.       Research methods included analytical, computational, physicochemical and chromatographic techniques using instruments and methodologies applied in the production of rectified ethanol. The custom-designed experimental apparatus was developed, which allowed to increase the accuracy measurements and reduced the time required to achieve phase equilibrium to 30–40 min. Experimental data on phase equilibrium in the ethanol-water system were obtained in the pressure range of 103 to 50.6 kPa specifically in the low ethanol concentration region (below 3.0 mоl. %), which corresponds to the operation conditions in the lower sections of distillation and rectification columns. Based on the experimental data, phase equilibrium modeling was performed for the specified pressure. The Tsuboko-Katayama equation was used for modeling. Thermodynamic validation of the results demonstrated a satisfactory level of agreement between calculated and experimental data. Phase equilibrium curves were constructed, the relationship between ethanol evaporation coefficients and pressure was established, and the inversion of equilibrium curves was identified.        Mass transfer methods between liquid and vapor under controlled cycles of liquid holdup and overflow have been developed, along with designs of mass-exchange apparatus for their implementation. The hydrodynamic operating modes of trays under cyclic conditions have been determined. Experimental results have shown that the extending the contact time between phases on the trays to 30-60 seconds significantly increases the efficiency and reduces steam consumption up to 40%. Для дослідження фазової рівноваги між рідиною і парою в системі етиловий спирт–вода розроблений прилад, конструкція якого дозволила підвищити точність результатів і скоротити час досягнення рівноважного стану до 30–40 хв. Отримані експериментальні дані щодо фазової рівноваги в діапазоні значень тиску від 103 до 50,6 кПа. Термодинамічна перевірка результатів показала задовільну ступінь узгодженості розрахункових і експериментальних даних. Розроблені способи масообміну між рідиною і парою в режимі контрольованих циклів затримки і переливу рідини та конструкції масообмінних апаратів для їх реалізації. Встановлені гідродинамічні режими роботи тарілок. Експериментально доведено, що подовження часу контакту фаз на тарілках до 30–60 с дозволяє  суттєво підвищити їх ККД  і скоротити витрати гріючої пари на 40 %. Institute of Engineering Thermophysics of NAS of Ukraine 2026-04-16 Article Article application/pdf https://ihe.nas.gov.ua/index.php/journal/article/view/660 10.31472/ttpe.1.2026.4 Thermophysics and Thermal Power Engineering; Vol 48 No 1 (2026): Thermophysics and Thermal Power Engineering; 38-46 Теплофизика и Теплоэнергетика; Vol 48 No 1 (2026): Thermophysics and Thermal Power Engineering; 38-46 Теплофізика та Теплоенергетика; Vol 48 No 1 (2026): Thermophysics and Thermal Power Engineering; 38-46 2663-7235 uk https://ihe.nas.gov.ua/index.php/journal/article/view/660/576 |
| spellingShingle | Bulii, Yu.V. Obodovych, O.M. Bondar, M.V. Sydorenko, V. V. ПІДВИЩЕННЯ ККД ТАРІЛОК В КОЛОННИХ МАСООБМІННИХ АПАРАТАХ |
| title | ПІДВИЩЕННЯ ККД ТАРІЛОК В КОЛОННИХ МАСООБМІННИХ АПАРАТАХ |
| title_alt | ENCHANCEMENT OF TRAY EFFICIENCY IN COLUMN MASS-EXCHANGE APPARATUS |
| title_full | ПІДВИЩЕННЯ ККД ТАРІЛОК В КОЛОННИХ МАСООБМІННИХ АПАРАТАХ |
| title_fullStr | ПІДВИЩЕННЯ ККД ТАРІЛОК В КОЛОННИХ МАСООБМІННИХ АПАРАТАХ |
| title_full_unstemmed | ПІДВИЩЕННЯ ККД ТАРІЛОК В КОЛОННИХ МАСООБМІННИХ АПАРАТАХ |
| title_short | ПІДВИЩЕННЯ ККД ТАРІЛОК В КОЛОННИХ МАСООБМІННИХ АПАРАТАХ |
| title_sort | підвищення ккд тарілок в колонних масообмінних апаратах |
| url | https://ihe.nas.gov.ua/index.php/journal/article/view/660 |
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