Modeling of the Compression Process for Refrigerants R134a and R1234yf of a Variable Speed Reciprocating Compressor

Authors

  • J.M. Barroso-Maldonado University of Guanajuato, Salamanca, Gto., CP.36885, Mexico
  • J.M. Belman-Flores University of Guanajuato, Salamanca, Gto., CP.36885, Mexico
  • S. Ledesma University of Guanajuato, Salamanca, Gto., CP.36885, Mexico

DOI:

https://doi.org/10.15377/2409-5826.2015.02.01.5

Keywords:

Vapour compression, refrigeration, energy, thermodynamic analysis.

Abstract

This paper presents a robust computational model to predict the behavior of a variable speed reciprocatingcompressor, incorporating infinitesimal displacements to calculate state by state according to the piston movement. Thephilosophy of the model is to consider eight sub internal processes: heat transfer on the suction and discharge internallines, pressure drop across the suction and discharge valves, expansion, suction, compression and discharge. The inputvariables are: pressure and temperature on the suction (before starting the compression process), discharge pressure(after the compression process completed) and rotation speed, with this the model is able to compute the outputparameters like: mass flow rate, power consumption and discharge temperature. With the development of the model, thebehaviors of R1234yf and R134a are analyzed. Then the model is validated with experimental data using these bothrefrigerants, concluding that the model predict with an error of ±10% for the mass flow rate and power consumption, andwith an error of ±1 K for the discharge temperature. In the validation, differences in energy behavior for the tworefrigerants are discussed; the compressor with R1234yf as working fluid increases its power consumption and deliversgreater mass flow rate with low temperature compared when the working fluid on the compressor is R134a.

Author Biographies

J.M. Barroso-Maldonado, University of Guanajuato, Salamanca, Gto., CP.36885, Mexico

Engineering Division, Campus Irapuato-Salamanca

J.M. Belman-Flores, University of Guanajuato, Salamanca, Gto., CP.36885, Mexico

Engineering Division, Campus Irapuato-Salamanca

S. Ledesma, University of Guanajuato, Salamanca, Gto., CP.36885, Mexico

Engineering Division, Campus Irapuato-Salamanca

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Published

2015-01-15

How to Cite

1.
J.M. Barroso-Maldonado, J.M. Belman-Flores, S. Ledesma. Modeling of the Compression Process for Refrigerants R134a and R1234yf of a Variable Speed Reciprocating Compressor. J. Adv. Therm. Sci. Res. [Internet]. 2015Jan.15 [cited 2021Sep.26];2(1):33-4. Available from: https://www.avantipublishers.com/jms/index.php/jatsr/article/view/215

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