Conversion of a Direct to an Indirect Refrigeration System at Medium Temperature Using R-134a and R-507A: An Energy Impact Analysis
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comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/8617
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INVESTIGACIONMetadata
Title
Conversion of a Direct to an Indirect Refrigeration System at Medium Temperature Using R-134a and R-507A: An Energy Impact AnalysisAuthor (s)
Date
2018-02-06Publisher
MDPIISSN
2076-3417Bibliographic citation
LLOPIS, Rodrigo, et al. Conversion of a Direct to an Indirect Refrigeration System at Medium Temperature Using R-134a and R-507A: An Energy Impact Analysis. Applied Sciences, 2018, vol. 8, no 2, p. 247Type
info:eu-repo/semantics/articlePublisher version
http://www.mdpi.com/2076-3417/8/2/247/htmlVersion
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Abstract
This work presents the experimental evaluation of energy consumption and refrigerant charge reduction when a commercial direct expansion refrigeration system is converted into an indirect system. The evaluation (with ... [+]
This work presents the experimental evaluation of energy consumption and refrigerant charge reduction when a commercial direct expansion refrigeration system is converted into an indirect system. The evaluation (with R-134a and R-507A) used a commercial cabinet with doors for medium temperature and a single-stage refrigeration cycle using a semi-hermetic compressor and electronic expansion valve; 24-h energy consumption tests were performed at laboratory conditions for each refrigerant and configuration at three heat rejection levels (23.3, 32.8 and 43.6 °C), maintaining an average product temperature inside the cabinet of 2 °C. The work analyses the impact of the conversion on temperature and pressure indicators, as well as, in the energy performance of each element. For R-134a the refrigerant charge was reduced in a 42.9%, but the energy consumption rose by 22.0%–22.8%; for R-507A the charge reduction was of 32.8% with an increase in energy consumption of between 27.7% and 38.7%. [-]
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Applied Sciences, 2018, vol. 8, no 2Investigation project
Ministerio de Economia y Competitividad of Spain: ENE2014-53760-R.7, FPI BES-2015-073612; Jaume I University of Spain: P11B2015-66; Generalitat Valenciana of Spain: ACIF/2017/194Rights
info:eu-repo/semantics/openAccess
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