Evaluation of thermodynamic perfection of the heating cascade machine cycles

Authors

  • Larisa Morozyuk V. S. Martynovsky Institute of Refrigeration, and cryotechnology Ecoenergy Odessa National Academy of Food Technologies 1/3 Dvoryanska str., Odessa, Ukraine, 65082, Ukraine

DOI:

https://doi.org/10.15587/1729-4061.2016.65939

Keywords:

heating cascade machine, R744, supercritical cycle, degree of thermodynamic perfection

Abstract

One of the promising trends in the refrigerating engineering is building machines for industrial processes with the simultaneous use of two thermal effects (heat and cold). The fundamental possibility to build machines, operating on a complex reverse thermodynamic cycle with the production of low-grade cold and high-grade heat is considered. Such machines are called heating cascade machines. The synthesis of cyclic machine solutions for various pairs of materials, based on thermodynamic analysis by the “method of cycles” is carried out. The analysis of the supercritical cycle of the upper cascade with R744 by the entropy-cycle method is performed. It is shown that the compound Carnot-Lorenz cycle (“triangular”) should be chosen as the cycle model. The problem of determining the degree of thermodynamic perfection of the cascade cycle, which takes into account the simultaneous production of two thermal effects – cold and heat is solved. An example of the calculation of the machine characteristics under variable input parameters: temperature in the condenser-evaporator and the pressure in the gas cooler is given. The comparison with the characteristics of the cascade machine, operating in the same mode, but with one thermal effect – the production of cold, which showed the benefits of heating cycles is performed. It is proved that, given the simultaneous high temperatures of the heat produced and low temperature of the cold produced in the cascade heating machine, energy performance is quite high. General recommendations – in terms of energy saving, heating cascade units and machines, operating with R744 as a working substance of the upper cascade and the cycle in the supercritical region with the simultaneous heat and cold production should be designed.

Author Biography

Larisa Morozyuk, V. S. Martynovsky Institute of Refrigeration, and cryotechnology Ecoenergy Odessa National Academy of Food Technologies 1/3 Dvoryanska str., Odessa, Ukraine, 65082

Doctor of Technical Science, Professor

Department of f cryogenic equipment

References

  1. Lorentzen, G. (1994). The use of natural refrigerants. IIR conference on new application of natural working fluids in refrigeration and air-conditioning. Germany.
  2. Bingming, W., Huagen, W., Jianfeng, L., Ziwen, X. (2009). Experimental investigation on the performance of NH3/CO2 cascade refrigeration system with twin-screw compressor. International Journal of Refrigeration, 32 (6), 1358–1365. doi: 10.1016/j.ijrefrig.2009.03.008
  3. Dopazo, J. A., Fernández-Seara, J. (2011). Experimental evaluation of a cascade refrigeration system prototype with CO2 and NH3 for freezing process applications. International Journal of Refrigeration, 34 (1), 257–267. doi: 10.1016/j.ijrefrig.2010.07.010
  4. Bhattacharyya, S., Mukhopadhyay, S., Kumar, A., Khurana, R. K., Sarkar, J. (2005). Optimization of a CO2–C3H8 cascade system for refrigeration and heating. International Journal of Refrigeration, 28 (8), 1284–1292. doi: 10.1016/j.ijrefrig.2005.08.010
  5. Di Nicola, G., Giuliani, G., Polonara, F., Stryjek, R. (2005). Blends of carbon dioxide and HFCs as working fluids for the low-temperature circuit in cascade refrigerating systems. International Journal of Refrigeration, 28 (2), 130–140. doi: 10.1016/j.ijrefrig.2004.06.014
  6. Yamaguchi, H., Niu, X.-D., Sekimoto, K., Nekså, P. (2011). Investigation of dry ice blockage in an ultra-low temperature cascade refrigeration system using CO2 as a working fluid. International Journal of Refrigeration, 34 (2), 466–475. doi: 10.1016/j.ijrefrig.2010.11.001
  7. Martyinovskiy, V. S. (1972). Analiz deystvitelnyih termodinamicheskih tsiklov. Moscow: Energiya, 216.
  8. Kompressoryi dlya CO2. Danfoss. Available at: http://s-parts.com.ua/documentation-20/danfoss/co2.html (Last accessed: 29.05.2012).
  9. Novyiy spiralnyiy kompressor dlya CO2. Emerson Climate Technologies. Available at: http://www.emersonclimate.com/europe/Documents/RU_Documents/2011_0526_PREL_CO2scroll_RU.pdf (Last accessed: 26.10.2011).
  10. Nikulshin, R. K. (2012). Entropiynyiy metod modelirovaniya i analiza dvuhstupenchatyih tsiklov holodilnih mashin i teplovih nasosov. Sbornik nauchnyih trudov 8-oy Mezhdunarodnoy nauchno-tehnicheskoy konferentsii «Ustoychivoe razvitie i iskusstvennyiy holod», 1, 8–16.
  11. Morozyuk, L. I. (2016). Termodinamicheskiy analiz kaskadnyih holodilnyih mashin s R744 v verhnem. Holodilnaya tehnika i tehnologiya, 52 (1), 12–17.
  12. 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: 10.2298/tsci0601111m
  13. Rozhentsev, A., Naer, V. A., Wang, C.-C. (2005). The analysis of triangular cycles of cooling and heating. Applied Thermal Engineering, 25 (1), 21–30. doi: 10.1016/j.applthermaleng.2004.05.009
  14. Khaliq, A. (2009). Exergy analysis of gas turbine trigeneration system for combined production of power heat and refrigeration. International Journal of Refrigeration, 32 (3), 534–545. doi: 10.1016/j.ijrefrig.2008.06.007

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Published

2016-04-24

How to Cite

Morozyuk, L. (2016). Evaluation of thermodynamic perfection of the heating cascade machine cycles. Eastern-European Journal of Enterprise Technologies, 2(8(80), 50–55. https://doi.org/10.15587/1729-4061.2016.65939

Issue

Vol. 2 No. 8(80) (2016): Energy-saving technologies and equipment

Section

Energy-saving technologies and equipment

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Copyright (c) 2016 Larisa Morozyuk

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