Refrigerating machine operating characteristics under various mixed refrigerant mass charges

Investigation of the starting modes of the low-temperature refrigerating machines working on the mixtures of refrigerants

“…This assumption was rather oversimplified but the only possible one under the given conditions. There was reported (Rozhentsev, 2008) that the charging and circulating compositions of non-azeotropic working mixtures could be in close agreement in MR refrigerating machines charged with a working mixture thoroughly optimized by composition and mass. As it was already mentioned above, the MR system under investigation was charging with the working mixtures optimized by mass.…”

Low Charge Transport Refrigerator (I). Refrigerant Charge and Strategies of Charge Reduction

“…The CO 2 system showed higher performance sensitivity to refrigerant charge than that other compared systems. Rozhentsev [11] investigated a low-temperature Joule-Thomson refrigerating machine, using a nonazeotropic mixture of refrigerants. The machine was equipped with a single-stage hermetic compressor, operated at the temperature level of -75°C and was charged with the working non-azeotropic mixture which comprised of two components with considerably different thermodynamic properties.…”

The role of maintenance in energy saving in commercial refrigeration

“…It is essential that the optimal mass charge is known in order to determine the best monitoring and maintenance procedure. Rozhentsev (2008) has proposed a computational model for determining the correct charge.…”