Journal
INTERNATIONAL JOURNAL OF REFRIGERATION
Volume 36, Issue 7, Pages 1821-1829Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2013.04.022
Keywords
Compressor; Injection cycle; Economizer; Extreme conditions; Heat pumps
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Funding
- Spanish Ministerio de Economia y Competitividad [DPI 2011-26771-C02-01]
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The interest in two stage cycles has increased in the last years and some compressor manufacturers have commercialized compressors adapted to work in these conditions. Nevertheless, the information supplied by them usually is limited to certain design conditions defined by the application and extrapolation to other conditions is not straightforward. In this article a test campaign of an injection scroll compressor is presented. This test campaign was divided in two parts, on the first one a wide range of evaporating and condensing pressures for the intermediate conditions recommended by the manufacturer were measured, and the compressor behavior was systematically compared with single stage compressor of the same volume. On the second part an experimental study of the influence of the intermediate conditions on the performance have been done. The study has included the evaluation of the separate influence of intermediate gas superheat, intermediate pressure and wet injection. (C) 2013 Elsevier Ltd and IIR. All rights reserved.
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