Grey-box Fault Models and Applications for Low Carbon Emission CO2 Refrigeration System

Yanfei Li; Jian Sun; Brian Fricke; Piljae Im; Teja Kuruganti

doi:10.1016/j.ijrefrig.2022.06.003

Grey-box Fault Models and Applications for Low Carbon Emission CO2 Refrigeration System

Yanfei Li, Jian Sun, Brian Fricke, Piljae Im, Teja Kuruganti

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

8 Scopus citations

Abstract

CO2 refrigeration systems have attracted more attentions in recent years because of their zero-carbon emission advantages compared with traditional refrigerants. These systems are widely used in certain commercial buildings such as supermarkets. However, very limited energy studies have been done for such refrigeration systems under faults. This study investigated five common faults for supermarket transcritical CO2 refrigeration systems with display cases. The following major tasks were implemented for this study. (1) Five fault models (gray-box format) regarding the power consumption and supply air temperature were proposed for low- and high-temperature display cases, respectively. The models cover: ice accumulation on evaporator coil, evaporator fan partial failure, expansion valve failure, display door open, and condenser blockage. (2) These fault models were calibrated with field tests, and the modeling accuracies were in good agreement with measurement datasets. (3) The proposed fault models demonstrated more than 90% of fault detection for Fault Detection and Diagnostics (FDD) purposes for both field measurement and simulated data.

Original language	English
Pages (from-to)	76-89
Number of pages	14
Journal	International Journal of Refrigeration
Volume	141
DOIs	https://doi.org/10.1016/j.ijrefrig.2022.06.003
State	Published - Sep 2022

Funding

Funding for this research was provided by the US Department of Energy, Office of Energy Efficiency and Renewable Energy, Building Technology Office. The authors would like to thank Erika Gupta, Antonio Bouza, Ed Vineyard, and Samuel Petty, Program Managers of the Building Technologies Office, for their support of this work. This manuscript has been authored in part by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan )

Keywords

Fault Detection and Diagnostics (FDD)
Fault Impacts
Fault Model
Refrigeration System
Transcritical CO2 Refrigeration

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijrefrig.2022.06.003

Cite this

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title = "Grey-box Fault Models and Applications for Low Carbon Emission CO2 Refrigeration System",

abstract = "CO2 refrigeration systems have attracted more attentions in recent years because of their zero-carbon emission advantages compared with traditional refrigerants. These systems are widely used in certain commercial buildings such as supermarkets. However, very limited energy studies have been done for such refrigeration systems under faults. This study investigated five common faults for supermarket transcritical CO2 refrigeration systems with display cases. The following major tasks were implemented for this study. (1) Five fault models (gray-box format) regarding the power consumption and supply air temperature were proposed for low- and high-temperature display cases, respectively. The models cover: ice accumulation on evaporator coil, evaporator fan partial failure, expansion valve failure, display door open, and condenser blockage. (2) These fault models were calibrated with field tests, and the modeling accuracies were in good agreement with measurement datasets. (3) The proposed fault models demonstrated more than 90% of fault detection for Fault Detection and Diagnostics (FDD) purposes for both field measurement and simulated data.",

keywords = "Fault Detection and Diagnostics (FDD), Fault Impacts, Fault Model, Refrigeration System, Transcritical CO2 Refrigeration",

author = "Yanfei Li and Jian Sun and Brian Fricke and Piljae Im and Teja Kuruganti",

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AU - Li, Yanfei

AU - Sun, Jian

AU - Fricke, Brian

AU - Im, Piljae

AU - Kuruganti, Teja

PY - 2022/9

Y1 - 2022/9

N2 - CO2 refrigeration systems have attracted more attentions in recent years because of their zero-carbon emission advantages compared with traditional refrigerants. These systems are widely used in certain commercial buildings such as supermarkets. However, very limited energy studies have been done for such refrigeration systems under faults. This study investigated five common faults for supermarket transcritical CO2 refrigeration systems with display cases. The following major tasks were implemented for this study. (1) Five fault models (gray-box format) regarding the power consumption and supply air temperature were proposed for low- and high-temperature display cases, respectively. The models cover: ice accumulation on evaporator coil, evaporator fan partial failure, expansion valve failure, display door open, and condenser blockage. (2) These fault models were calibrated with field tests, and the modeling accuracies were in good agreement with measurement datasets. (3) The proposed fault models demonstrated more than 90% of fault detection for Fault Detection and Diagnostics (FDD) purposes for both field measurement and simulated data.

AB - CO2 refrigeration systems have attracted more attentions in recent years because of their zero-carbon emission advantages compared with traditional refrigerants. These systems are widely used in certain commercial buildings such as supermarkets. However, very limited energy studies have been done for such refrigeration systems under faults. This study investigated five common faults for supermarket transcritical CO2 refrigeration systems with display cases. The following major tasks were implemented for this study. (1) Five fault models (gray-box format) regarding the power consumption and supply air temperature were proposed for low- and high-temperature display cases, respectively. The models cover: ice accumulation on evaporator coil, evaporator fan partial failure, expansion valve failure, display door open, and condenser blockage. (2) These fault models were calibrated with field tests, and the modeling accuracies were in good agreement with measurement datasets. (3) The proposed fault models demonstrated more than 90% of fault detection for Fault Detection and Diagnostics (FDD) purposes for both field measurement and simulated data.

KW - Fault Detection and Diagnostics (FDD)

KW - Fault Impacts

KW - Fault Model

KW - Refrigeration System

KW - Transcritical CO2 Refrigeration

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ER -

Grey-box Fault Models and Applications for Low Carbon Emission CO2 Refrigeration System

Abstract

Funding

Keywords

UN SDGs

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