Entropybased methods applied to the evaluation of a real refrigeration machine
| Autor: | Sergey Gayduk, Larisa Morozyuk, Andrii Moshkatiuk, Viktoriia Sokolovska-Yefymenko |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
solid fouling
Materials science real refrigeration machine Energy Engineering and Power Technology Industrial and Manufacturing Engineering Management of Technology and Innovation Heat exchanger Thermal lcsh:Technology (General) lcsh:Industry Electrical and Electronic Engineering Process engineering entropy methods Fouling business.industry Applied Mathematics Mechanical Engineering Refrigeration Aerodynamics Computer Science Applications Control and Systems Engineering Heat transfer lcsh:T1-995 lcsh:HD2321-4730.9 Minification business Gas compressor aircooled condenser |
| Zdroj: | Eastern-European Journal of Enterprise Technologies, Vol 6, Iss 8 (96), Pp 49-56 (2018) |
| ISSN: | 1729-4061 1729-3774 |
| Popis: | 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 saving |
| Databáze: | OpenAIRE |
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