Influence of Transformation Coefficient of Refrigerating Machine on Exergetic Efficiency of Air Conditioning System of Operating Clean Rooms

: pp. 9 – 16
Received: March 28, 2023
Revised: April 24, 2023
Accepted: May 04, 2023
Lviv Polytechnic National University
Lviv Polytechnic National University

Exergetic method is a universal way of thermodynamic research of various processes of energy transformation in energy technological systems, to which air conditioning system for clean room belongs. Implementation of exergetic analysis for energy technological system makes it possible to determine the influence of various elements of its system on its work and because of this to increase the effectiveness of work of energy technological system in general. Performance of any air conditioning system depends on energy effectiveness of refrigeration machine, which serves it and consumes electricity to reduce the heat of supply air which enters the room. And it means that the main purpose of selection of certain refrigeration machine for air conditioning system is to reach the maximum cooling capacity with minimum energy consumption. Innovative mathematical research model of the implemented central straight flow air conditioning system for operating clean rooms was used in this article. The aim of the model is to make computer estimation of exergetic efficiency of existing air conditioning system depending on different factors which have influence on its work, in particular the coefficient of transformation (or energy efficiency rate, EER) of its refrigeration machine. The dependence of the exergetic output-input ratio of implemented air conditioning system for operating clean rooms on coefficient of transformation of its refrigeration machine by different parameters of outdoor and indoor air and the temperature difference between the indoor and supply air were presented. It is shown that the implemented air conditioning system should be preferably used with higher coefficient of transformation of its refrigeration machine and higher difference between temperatures of indoor and supply air by various temperatures of outdoor air that will give the opportunity to gain the highest exergetic output-input ratio, which means gaining the most cost effective option for the exploitation of implemented air conditioning system.

  1. Fedotov A.E. (2003) Clean rooms. Moscow, ASINKOM. (in Russian)
  2. Hayakawa I. (1990) Clean rooms. Moscow, Mir. (in Russian)
  3. White V. (2010) Cleanroom Technology: Fundamentals of Design, Testing and Operation. Willey.
  4. White V. (2004) Projection of clean rooms. Moscow, Klinrum. (in Russian)
  5. ISO 14644-1:2015. Clean Rooms and Associated Controlled Environments. Part 1: Classification of Air Cleanliness by Particle Concentration
  6. Sokolov, E. Ya., Brodyansky, V. M. (1981) Energetic foundations of heat transformation and cooling processes. Energoizdat, Moscow. (in Russian)
  7. Shargut, Ya., Petela, R. (1968) Exergy. Energy, Moscow. (in Russian)
  8. Brodyansky, V. M., Verkhivker. G. P., Karchev, Ya. Ya. and others (1991) Exergetic calculations of technical systems. Kyiv, Nauk.   Dumka. (in Russian)
  9. Brodyansky V. M. (1973) Exergetic method of thermodynamic analysis. Moscow, Energy. (in Russian)
  10. Ber G. D. (1977) Technical thermodynamics. Moscow, Mir. (in Russian)
  11. Bogoslovsky, V. N., Kokorin, O. Ya., Petrov, L. V. (1985) Air conditioning and refrigeration. Moscow, Stroyizdat. (in Russian)
  12. Prokhorov, V. I., Shilkloper, S. M. (1981) A method for calculating the exergy of a moist air flow. Refrigeration equipment. 9, 37–41. (in Russian)
  13. Shilkloper, S. M., Zhadyn, S. I.  (1982) Exergetic analysis of microclimate and energy supply systems. Construction and architecture. 9(4), 18–27. (in Russian)
  14. SNiP 2.04.05–86. (1987) Heating, ventilation and conditioning. Moscow, TSITP Gosstroya USSR. (in Russian)
  15. Yantovsky, E.  I. (1988) Flows of energy and exergy. Moscow, Nauka. (in Russian)
  16. Bes, T. (1962) Exergy in heating, air-conditioning and drying processes. Industrial Energy. 10(11), 388–392. (in Polish)
  17. Labay Volodymyr, Omelchuk Oksana. (2002). XIV Conference of heating engineers "Prospects for the development of district heating". Conference materials. Solina, Rzeszow University of Technology, 137–144. (in Polish)
  18. Labay Volodymyr, Ivanukh Taras. (2000) Exergetic efficiency of central air conditioners. 5th Rzeszow-Lviv-Koszyce Scientific Conference "Current problems of construction and environmental engineering". Proceedings of Rzeszow University of Technology "Construction and environmental engineering". 32(2), Environmental Engineering, 229–235. (in Ukrainian)
  19. Labay, V. Y., Garasym, D. I. (2014) Study of exergetic efficiency of air conditioning systems of clean rooms. Scientific and technical journal "Refrigeration technology and technology", 4(150), 47–53. (in Ukrainian)
  20. Labay, V., Harasym, D. (2014) Innovation model for energy efficient investigations of air conditioning systems for cleanrooms, ECONTECHMOD, Lublin-Rzeszow. 3(1), 47–52.
V. Labay, K. Andreiko. Influence of transformation coefficient of refrigerating machine on exergetic efficiency of air conditioning system operating clean rooms. Energy Engineering and Control Systems, 2023, Vol. 9, No. 1, pp. 9 – 16.