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Use of Diamond/POE nanolubricant in a refrigeration system operating with R410A and R32.
Number: pap. n. 1316
Author(s) : MARCUCCI D., FREITAS L., BANDARRA FILHO E., et al.
Summary
The present study deals with the use of a nanolubricant based on synthetic lubricant polyol ester (POE) and diamond nanoparticles in a refrigeration system. An experimental refrigeration bench was developed in order to evaluate the refrigeration capacity, the power consumption by the compressor, the coefficient of performance (COP), the discharge temperature of the compressor and, finally, the performance of the nanolubricants at the mass fractions of 0.0%, 0.1% and 0.5% of diamond nanoparticles. Tests were performed with R410A and R32 refrigerants in the evaporation temperature range between -7 and 7 °C, varying the operating frequency of the compressor from 45 to 60 Hz and maintaining the condensation temperature constant at 41 °C. According to the results of R410A, it was possible to conclude that, with the use of nanolubricant, there was an increase in both the refrigeration capacity and the coefficient of performance. The compressor’s discharge temperature decreased. In contrast, for R32, the use of nanolubricants under the evaluated conditions did not show significant improvements in the refrigeration system in terms of refrigeration capacity and discharge temperature.
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Details
- Original title: Use of Diamond/POE nanolubricant in a refrigeration system operating with R410A and R32.
- Record ID : 30026098
- Languages: English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Publication date: 2019/08/24
- DOI: http://dx.doi.org/10.18462/iir.icr.2019.1316
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Indexing
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Themes:
HFCs;
Lubricants - Keywords: Test rig; R410A; Polyolester; Nanolubricant; Temperature; Discharge; R32; Cooling capacity; Nanoparticle; COP
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