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

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.121711

Keywords:

ammonia production, secondary condensation, mathematical modeling of heat exchange processes, automated system

Abstract

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.

Author Biographies

Anatoliy Babichenko, National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Associate Professor

Department of Automation engineering systems and environmental monitoring

Juliya Babichenko, Ukrainian State University of Railway Transport Feierbakha sq., 7, Kharkiv, Ukraine, 61050

PhD, Associate Professor

Department of Thermal Engineering and heat engines

Yana Kravchenko, National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002

Postgraduate student

Department of Automation engineering systems and environmental monitoring

Svitlana Velma, National University of Pharmacy Pushkinska str., 53, Kharkiv, Ukraine, 61002

PhD, Associate Professor

Department of Pharmacological Informatics

Igor Krasnikov, National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Associate Professor

Department of Automation engineering systems and environmental monitoring

Ihor Lysachenko, National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Associate Professor

Department of Automation engineering systems and environmental monitoring

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Published

2018-01-26

How to Cite

Babichenko, A., Babichenko, J., Kravchenko, Y., Velma, S., Krasnikov, I., & Lysachenko, I. (2018). Identification of heat exchange process in the evaporators of absorption refrigerating units under conditions of uncertainty. Eastern-European Journal of Enterprise Technologies, 1(2 (91), 21–29. https://doi.org/10.15587/1729-4061.2018.121711