An evaluation of R22 substitutes performances regulating continuously the compressor refrigeration capacity

This paper presents the results of an experimental analysis which compares in terms of energetic performances the refrigeration capacity control obtained by means of a variable-speed compressor with the on/off control deriving from a classical thermostatic device. The compressor considered is semi-h...

Full description

Saved in:
Bibliographic Details
Published in:Applied thermal engineering 2004, Vol.24 (1), p.127-139
Main Authors: Aprea, C., Mastrullo, R., Renno, C., Vanoli, G.P.
Format: Article
Language:English
Subjects:
Air conditioning. Ventilation
Applied sciences
Energy
Energy saving
Energy. Thermal use of fuels
Exact sciences and technology
Heating, air conditioning and ventilation
R22 substitutes
Refrigerating engineering
Refrigerating engineering. Cryogenics. Food conservation
Refrigerating system
Techniques, equipment. Control. Metering
Techniques. Materials
Variable speed compressor
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents the results of an experimental analysis which compares in terms of energetic performances the refrigeration capacity control obtained by means of a variable-speed compressor with the on/off control deriving from a classical thermostatic device. The compressor considered is semi-hermetic reciprocating and is a component of a vapour compression refrigeration plant subjected to a commercially available cold store. The compressor working with the fluids R22, R507 and R407C and designed for a revolution speed corresponding to the compressor supply current nominal frequency of 50 Hz, has been tested varying the frequency in the range 30–50 Hz. In this range, the most suitable working fluids proposed as substitutes of the R22 as the R407C (R32/R125/R134a 23/25/52% in mass), the R507 (R125/R143A 50/50% in mass) and the R417A (R125/R134a/R600 46.6/50/3.4% in mass) have been tested. The results show that, using the R407C, it is possible an average an electric energy consumption about 12% smaller when an inverter is employed to control the compressor refrigeration capacity instead of the thermostatic control which imposes on/off cycles on the compressor, working at the nominal frequency of 50 Hz. So the R407C confirms its superiority in comparison with the R417A and R507; only the R22 shows a better performance.
ISSN:1359-4311
DOI:10.1016/S1359-4311(03)00187-X