Comparative evaluation of the intermediate systems employed in two-stage refrigeration cycles driven by compound compressors
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http://dx.doi.org/10.1016/j.energy.2009.11.009 |
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Títol
Comparative evaluation of the intermediate systems employed in two-stage refrigeration cycles driven by compound compressorsAutoria
Data de publicació
2010Editor
ElsevierISSN
3605442Cita bibliogràfica
Energy, 35, 3, p. 1274-1280Tipus de document
info:eu-repo/semantics/articleParaules clau / Matèries
Resum
This work presents an experimental evaluation, from an energy analysis point of view, for two of the most used inter-stage systems in two-stage vapour compression cycles driven by compound compressors: the direct ... [+]
This work presents an experimental evaluation, from an energy analysis point of view, for two of the most used inter-stage systems in two-stage vapour compression cycles driven by compound compressors: the direct liquid injection and subcooler systems. The evaluation, considers the two-stage cycle with no intermediate systems as reference cycle and was performed on a plant, driven by a compound compressor using the refrigerant R404A for an evaporating temperature range of -36 to -20 °C and for a condensing temperature range of 30-47 °C. The analysis of the results shows that the inter-stage systems determine the performance of the energy parameters, which are discussed in the paper. The configuration yielding the best results was the two-stage compression cycle with subcooler, since the cooling capacity and COP values for this configuration were the highest. Conversely, the two-stage compression cycle working with direct liquid injection showed lower performance from an energy point of view, though this configuration allows a substantial reduction of the discharge temperature. © 2009 Elsevier Ltd. All rights reserved. [-]
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