Entropybased methods applied to the evaluation of a real refrigeration machine
DOI:
https://doi.org/10.15587/1729-4061.2018.147710Keywords:
entropy methods, real refrigeration machine, aircooled condenser, solid foulingAbstract
The aim of the research is the thermodynamic analysis of a real refrigerating machine with solid fouling on the heatexchange surface of an aircooled condenser with the help of entropy methods such as: the entropycycle method, the entropystatistical method and the entropy generation minimization method. The experimental data of the refrigerating machine with solid fouling in the form of dust on the external surface of the aircooled condenser was used for the thermodynamic analysis.
The influence of irreversible losses in separate elements of the refrigerating machine caused by the presence of external solid fouling on the external heat exchange surface of the aircooled condenser was determined according to the entropycycle and entropystatistical methods. The entropycycle method has estimated the absolute value of energy losses in each element. The entropystatistical method was used to determine the excessive consumption of work in the real cycle in comparison with the theoretical compression process in the compressor.
The irreversible losses associated with aerodynamics and heat transfer during air motion through a finned surface in an aircooled heat exchanger were estimated by using the entropy generation minimization theory. The influence of growing fouling on the thermal and mechanical components of the total entropy generation in the heat exchanger was determined. In addition, the fouling mass that determines the time of its cleaning was defined.
Application of entropy methods for analyzing the real refrigerating machine at the design stage allows minimizing irreversible losses associated with operating conditions. Moreover, it allows predicting a maintenance schedule which contributes to energy savingReferences
- Yang, L., Braun, J. E., Groll, E. A. (2004). The Role of Filtration in Maintaining Clean Heat Exchanger Coils. Final ReportARTI-21CR/611-40050-01. Air-Conditioning and Refrigeration Technology Institute (ARTI). doi: https://doi.org/10.2172/833362
- Lankinen, R., Suihkonen, J., Sarkomaa, P. (2003). The effect of air side fouling on thermal-hydraulic characteristics of a compact heat exchanger. International Journal of Energy Research, 27 (4), 349–361. doi: https://doi.org/10.1002/er.880
- Bell, I. H., Groll, E. A. (2010). Experimental comparison of the impact of air-side particulate fouling on the thermo-hydraulic performance of microchannel and plate-fin heat exchangers. International Refrigeration and Air Conditioning conference.
- Mehrabi, M., Yuill, D. (2018). Evaluation the effect of washing on the heat transfer capacity on air-side flow resistance of air cooled condensers. International Refrigeration and Air Conditioning conference.
- Morosuk, L. I., Sokolovska, V. V., Gaiduk, S. V., Moshkatuk, A. V. (2017). Method of Experimental Investigation of Air-Cooled Condensers for Small Refrigeration Machines and Heat Pumps. Refrigeration Engineering and Technology, 53 (3), 4–11. doi: https://doi.org/10.15673/ret.v53i3.674
- Metod – termodinamicheskiy analiz. Bol'shaya Enciklopediya Nefti i Gaza. Available at: http://www.ngpedia.ru/id145767p2.html
- Gohshteyn, D. P. (1967). Sovremennye metody termodinamicheskogo analiza energeticheskih ustanovok: na pravah rukopisi. Odessa, 333.
- Dolinskiy, A. A., Brodyanskiy, V. M. (Eds.) (1991). Eksergeticheskie raschety tekhnicheskih sistem. Kyiv: Naukova dumka, 360.
- Morosuk, T., Nikulshin, R., Morosuk, L. (2006). Entropy-cycle method for analysis of refrigeration machine and heat pump cycles. Thermal Science, 10 (1), 111–124. doi: https://doi.org/10.2298/tsci0601111m
- Morozyuk, L. I., Sokolovskaya, V. V., Ol'shevskaya, O. V. (2013). Termodinamicheskiy analiz teploobmennyh apparatov v sostave energopreobrazuyushchey sistemy entropiyno-ciklovym metodom. Vestnik Mezhdunarodnoy akademii holoda, 4, 24–27.
- Arharov, A. M. (2014). Osnovy kriologii. Entropiyno-statisticheskiy analiz nizkotemperaturnyh sistem. Moscow: izd-vo MGTU im. N. E. Baumana, 507.
- Arharov, A. M. (2010). O nekotoryh osobennostyah termodinamicheskogo analiza nizkotemperaturnyh sistem. Vestnik MGTU im. N. E. Baumana. Ser.: Mashinostroenie, 29–40.
- Arharov, A. M., Shishov, V. V. (2013). Entropiyno-statisticheskiy analiz raspredeleniya zatrat energii na kompensaciyu neobratimosti rabochih processov sistem kondicionirovaniya. Vestnik MGTU im. N. E. Baumana. Ser.: Mashinostroenie, 2, 84–97.
- Prigozhin, I. (1960). Vvedenie v termodinamiku neobratimyh processov. Moscow: Izd-vo inostr. lit-ry, 160.
- Bejan, A. (1982). Entropy Generation through Heat and Fluid Flow. New York: John Wiley & Sons, 264.
- Bejan, A., Tsatsaronis, G., Moran, M. (1996). Thermal Design and Optimization. New York: John Wiley & Sons, 540.
- Le Goff, P., De Olivera, S., Schwarzer, B., Tondeur, D. (1991). Comparison of the entropic exergetic and economic optima of a heat exchanger. Analesis of Thermal and Energy Systems, Proceedings of International Conference Athens. Athens, 105–116.
- Khan, W. A., Yovanovich, M. M., Culham, J. R. (2006). Optimization of microchannel heat sinks using entropy generation minimization method. Twenty-Second Annual IEEE Semiconductor Thermal Measurement and Management Symposium. doi: https://doi.org/10.1109/stherm.2006.1625210
- Yazdi, M. H., Abdullah, S., Hashim, I., Sopian, K., Zaharim, A. (2009). Entropy generation analysis of liquid fluid past embedded open parallel microchannels within the surface. European journal of scientific research, 28 (3), 462–470.
- Morozyuk, L. I. (2015). Optimization of heat exchangers of refrigeration machines by entropy generation minimization method. Eastern-European Journal of Enterprise Technologies, 4 (8 (76)), 42–48. doi: https://doi.org/10.15587/1729-4061.2015.47753
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2018 Larisa Morozyuk, Viktoriia Sokolovska-Yefymenko, Sergey Gayduk, Andrii Moshkatiuk
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.
