Identification of heat exchange process in the evaporators of absorption refrigerating units under conditions of uncertainty

Analysis of the evaporator of the absorption refrigerating secondary condensation unit of ammonia production was performed. The need to minimize the temperature mode of operation of the evaporator, which provides for energy efficiency in ammonia production by decreasing natural gas consumption was s...

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Main Authors: Anatoliy Babichenko, Juliya Babichenko, Yana Kravchenko, Svitlana Velma, Igor Krasnikov, Ihor Lysachenko
Format: Article
Language:English
Published: PC Technology Center 2018-01-01
Series:Eastern-European Journal of Enterprise Technologies
Subjects:
Online Access:http://journals.uran.ua/eejet/article/view/121711
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spelling doaj-fe01166f7d1644f6804490c780a9a8182020-11-24T21:57:28ZengPC Technology CenterEastern-European Journal of Enterprise Technologies1729-37741729-40612018-01-0112 (91)212910.15587/1729-4061.2018.121711121711Identification of heat exchange process in the evaporators of absorption refrigerating units under conditions of uncertaintyAnatoliy Babichenko0Juliya Babichenko1Yana Kravchenko2Svitlana Velma3Igor Krasnikov4Ihor Lysachenko5National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002Ukrainian State University of Railway Transport Feierbakha sq., 7, Kharkiv, Ukraine, 61050National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002National University of Pharmacy Pushkinska str., 53, Kharkiv, Ukraine, 61002National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002Analysis of the evaporator of the absorption refrigerating secondary condensation unit of ammonia production was performed. The need to minimize the temperature mode of operation of the evaporator, which provides for energy efficiency in ammonia production by decreasing natural gas consumption was substantiated. Statistical processing of experimental data with assessment of the quality of obtained information was performed. Identification of the heat exchange process of the evaporator was performed and the equation for numerical evaluation of uncertainty of coefficients of thermal efficiency, heat transfer and condensation thermal resistance was obtained. According to the results of statistical modeling of the primary condensation unit, the equation for numerical evaluation of uncertainty of ammonia concentration in circulating gas at the evaporator inlet. The authors proved the possibility of its application for identification and mathematical modeling of heat exchange process at existing relationship of ammonia concentration in the circulating gas at the evaporator inlet and condensation thermal resistance. Algorithmic support of numerical evaluation of uncertainties and calculation of target indicators of the evaporator’s efficiency was created. The technical structure of the automated system for identification and timely obtaining of the mathematical model of the evaporator, which is adapted to the existing information system of the industrial ammonia synthesis unit, was developed.http://journals.uran.ua/eejet/article/view/121711ammonia productionsecondary condensationmathematical modeling of heat exchange processesautomated system
collection DOAJ
language English
format Article
sources DOAJ
author Anatoliy Babichenko
Juliya Babichenko
Yana Kravchenko
Svitlana Velma
Igor Krasnikov
Ihor Lysachenko
spellingShingle Anatoliy Babichenko
Juliya Babichenko
Yana Kravchenko
Svitlana Velma
Igor Krasnikov
Ihor Lysachenko
Identification of heat exchange process in the evaporators of absorption refrigerating units under conditions of uncertainty
Eastern-European Journal of Enterprise Technologies
ammonia production
secondary condensation
mathematical modeling of heat exchange processes
automated system
author_facet Anatoliy Babichenko
Juliya Babichenko
Yana Kravchenko
Svitlana Velma
Igor Krasnikov
Ihor Lysachenko
author_sort Anatoliy Babichenko
title Identification of heat exchange process in the evaporators of absorption refrigerating units under conditions of uncertainty
title_short Identification of heat exchange process in the evaporators of absorption refrigerating units under conditions of uncertainty
title_full Identification of heat exchange process in the evaporators of absorption refrigerating units under conditions of uncertainty
title_fullStr Identification of heat exchange process in the evaporators of absorption refrigerating units under conditions of uncertainty
title_full_unstemmed Identification of heat exchange process in the evaporators of absorption refrigerating units under conditions of uncertainty
title_sort identification of heat exchange process in the evaporators of absorption refrigerating units under conditions of uncertainty
publisher PC Technology Center
series Eastern-European Journal of Enterprise Technologies
issn 1729-3774
1729-4061
publishDate 2018-01-01
description Analysis of the evaporator of the absorption refrigerating secondary condensation unit of ammonia production was performed. The need to minimize the temperature mode of operation of the evaporator, which provides for energy efficiency in ammonia production by decreasing natural gas consumption was substantiated. Statistical processing of experimental data with assessment of the quality of obtained information was performed. Identification of the heat exchange process of the evaporator was performed and the equation for numerical evaluation of uncertainty of coefficients of thermal efficiency, heat transfer and condensation thermal resistance was obtained. According to the results of statistical modeling of the primary condensation unit, the equation for numerical evaluation of uncertainty of ammonia concentration in circulating gas at the evaporator inlet. The authors proved the possibility of its application for identification and mathematical modeling of heat exchange process at existing relationship of ammonia concentration in the circulating gas at the evaporator inlet and condensation thermal resistance. Algorithmic support of numerical evaluation of uncertainties and calculation of target indicators of the evaporator’s efficiency was created. The technical structure of the automated system for identification and timely obtaining of the mathematical model of the evaporator, which is adapted to the existing information system of the industrial ammonia synthesis unit, was developed.
topic ammonia production
secondary condensation
mathematical modeling of heat exchange processes
automated system
url http://journals.uran.ua/eejet/article/view/121711
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