Comparative analysis of various CO2 configurations in supermarket refrigeration systems

Vishaldeep Sharma; Brian Fricke; Pradeep Bansal

doi:10.1016/j.ijrefrig.2014.07.001

Comparative analysis of various CO₂ configurations in supermarket refrigeration systems

Vishaldeep Sharma, Brian Fricke, Pradeep Bansal

Building Equipment Research Group

Research output: Contribution to journal › Article › peer-review

105 Scopus citations

Abstract

This paper presents an analysis of various CO₂ transcritical and cascade/secondary loop refrigeration systems that are becoming popular in supermarket applications with the objective of optimizing the operating parameters of these systems. In addition, the performance of selected CO₂-based refrigeration systems is compared to the baseline R404A multiplex direct expansion system using bin analyses in the eight climate zones of the United States. For the refrigeration systems investigated, it was found that the Transcritical Booster System with Bypass Compressor (TBS-BC) had the lowest energy consumption for ambient temperatures (T_amb) less than 8 °C, and for higher ambient temperatures the R404A direct expansion system was found to have the lowest energy consumption. Also, the TBS-BC performs equivalent to or better than the R404A direct expansion system in the northern two-thirds of the US. For the southern portion of the US, the R404A multiplex DX system performs better than CO₂ systems.

Original language	English
Pages (from-to)	86-99
Number of pages	14
Journal	International Journal of Refrigeration
Volume	46
DOIs	https://doi.org/10.1016/j.ijrefrig.2014.07.001
State	Published - Oct 2014

Funding

Notice: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes.

Funders	Funder number
U.S. Department of Energy

Keywords

Carbon dioxide
Cascade system
Refrigeration
Secondary loop system
Thermodynamics
Transcritical booster system

Access to Document

10.1016/j.ijrefrig.2014.07.001

Cite this

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