Fault detection algorithm for multiple-simultaneous refrigerant charge and secondary fluid flow rate faults in heat pumps

Samuel Boahen; Kwesi Mensah; Selorm Kwaku Anka; Kwang Ho Lee; Jong Min Choi

doi:10.3390/en14133877

Fault detection algorithm for multiple-simultaneous refrigerant charge and secondary fluid flow rate faults in heat pumps

Samuel Boahen
, Kwesi Mensah
, Selorm Kwaku Anka
, Kwang Ho Lee
, Jong Min Choi^*

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

The detection and diagnosis of faults is becoming necessary in ensuring energy savings in heat pump units. Faults can exist independently or simultaneously in heat pumps at the refrigerant side and secondary fluid flow loops. In this work, we discuss the effects that simultaneous refrigerant charge faults and faults associated with the flow rate of secondary fluids have on the performance of a heat pump operating in summer season and we developed a correlation to detect and diagnose these faults using multiple linear regression. The faults considered include simultaneous refrigerant charge and indoor heat exchanger secondary fluid flow rate faults (IFRFs), simultaneous refrigerant charge and outdoor heat exchanger secondary fluid flow rate faults (OFRFs) and simultaneous refrigerant charge, IFRF and OFRF. The occurrence of simultaneous refrigerant charge fault, IFRF and OFRF caused up to a 5.7% and 8% decrease in cooling capacity compared to simultaneous refrigerant charge and indoor heat exchanger secondary fluid flow rate faults, and simultaneous refrigerant charge and outdoor heat exchanger secondary fluid flow rate faults, respectively. Simultaneous refrigerant charge fault, IFRF and OFRF resulted in up to an 11.6% and 5.9% decrease in COP of the heat pump unit compared to simultaneous refrigerant charge fault and IFRF, and simultaneous refrigerant charge fault and OFRF, respectively. The developed FDD correlations accurately predicted the simultaneous refrigerant charge and faults in the flow rate of the secondary fluid within an error margin of 7.7%.

Original language	English
Article number	3877
Journal	Energies
Volume	14
Issue number	13
DOIs	https://doi.org/10.3390/en14133877
Publication status	Published - 2021 Jul 1

Bibliographical note

Funding Information:
Acknowledgments: This research was assisted by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1A2C2087157, Artificial neutral network-based optimized operating model of building HVAC systems control parameters for improved energy efficiency and reduced operating cost).

Funding Information:
Funding: This work was sponsored by the Korean government (MSIT) [No. 2019R1A2C2087157].

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Brine flow rate fault
COP
Cooling capacity
Fault detection
Fault diagnosis
Heat pump
Refrigerant charge fault

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology
Energy (miscellaneous)
Control and Optimization
Electrical and Electronic Engineering

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10.3390/en14133877

Cite this

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title = "Fault detection algorithm for multiple-simultaneous refrigerant charge and secondary fluid flow rate faults in heat pumps",

abstract = "The detection and diagnosis of faults is becoming necessary in ensuring energy savings in heat pump units. Faults can exist independently or simultaneously in heat pumps at the refrigerant side and secondary fluid flow loops. In this work, we discuss the effects that simultaneous refrigerant charge faults and faults associated with the flow rate of secondary fluids have on the performance of a heat pump operating in summer season and we developed a correlation to detect and diagnose these faults using multiple linear regression. The faults considered include simultaneous refrigerant charge and indoor heat exchanger secondary fluid flow rate faults (IFRFs), simultaneous refrigerant charge and outdoor heat exchanger secondary fluid flow rate faults (OFRFs) and simultaneous refrigerant charge, IFRF and OFRF. The occurrence of simultaneous refrigerant charge fault, IFRF and OFRF caused up to a 5.7\% and 8\% decrease in cooling capacity compared to simultaneous refrigerant charge and indoor heat exchanger secondary fluid flow rate faults, and simultaneous refrigerant charge and outdoor heat exchanger secondary fluid flow rate faults, respectively. Simultaneous refrigerant charge fault, IFRF and OFRF resulted in up to an 11.6\% and 5.9\% decrease in COP of the heat pump unit compared to simultaneous refrigerant charge fault and IFRF, and simultaneous refrigerant charge fault and OFRF, respectively. The developed FDD correlations accurately predicted the simultaneous refrigerant charge and faults in the flow rate of the secondary fluid within an error margin of 7.7\%.",

keywords = "Brine flow rate fault, COP, Cooling capacity, Fault detection, Fault diagnosis, Heat pump, Refrigerant charge fault",

author = "Samuel Boahen and Kwesi Mensah and Anka, \{Selorm Kwaku\} and Lee, \{Kwang Ho\} and Choi, \{Jong Min\}",

note = "Funding Information: Acknowledgments: This research was assisted by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1A2C2087157, Artificial neutral network-based optimized operating model of building HVAC systems control parameters for improved energy efficiency and reduced operating cost). Funding Information: Funding: This work was sponsored by the Korean government (MSIT) [No. 2019R1A2C2087157]. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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doi = "10.3390/en14133877",

language = "English",

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T1 - Fault detection algorithm for multiple-simultaneous refrigerant charge and secondary fluid flow rate faults in heat pumps

AU - Boahen, Samuel

AU - Mensah, Kwesi

AU - Anka, Selorm Kwaku

AU - Lee, Kwang Ho

AU - Choi, Jong Min

N1 - Funding Information: Acknowledgments: This research was assisted by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1A2C2087157, Artificial neutral network-based optimized operating model of building HVAC systems control parameters for improved energy efficiency and reduced operating cost). Funding Information: Funding: This work was sponsored by the Korean government (MSIT) [No. 2019R1A2C2087157]. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/7/1

Y1 - 2021/7/1

N2 - The detection and diagnosis of faults is becoming necessary in ensuring energy savings in heat pump units. Faults can exist independently or simultaneously in heat pumps at the refrigerant side and secondary fluid flow loops. In this work, we discuss the effects that simultaneous refrigerant charge faults and faults associated with the flow rate of secondary fluids have on the performance of a heat pump operating in summer season and we developed a correlation to detect and diagnose these faults using multiple linear regression. The faults considered include simultaneous refrigerant charge and indoor heat exchanger secondary fluid flow rate faults (IFRFs), simultaneous refrigerant charge and outdoor heat exchanger secondary fluid flow rate faults (OFRFs) and simultaneous refrigerant charge, IFRF and OFRF. The occurrence of simultaneous refrigerant charge fault, IFRF and OFRF caused up to a 5.7% and 8% decrease in cooling capacity compared to simultaneous refrigerant charge and indoor heat exchanger secondary fluid flow rate faults, and simultaneous refrigerant charge and outdoor heat exchanger secondary fluid flow rate faults, respectively. Simultaneous refrigerant charge fault, IFRF and OFRF resulted in up to an 11.6% and 5.9% decrease in COP of the heat pump unit compared to simultaneous refrigerant charge fault and IFRF, and simultaneous refrigerant charge fault and OFRF, respectively. The developed FDD correlations accurately predicted the simultaneous refrigerant charge and faults in the flow rate of the secondary fluid within an error margin of 7.7%.

AB - The detection and diagnosis of faults is becoming necessary in ensuring energy savings in heat pump units. Faults can exist independently or simultaneously in heat pumps at the refrigerant side and secondary fluid flow loops. In this work, we discuss the effects that simultaneous refrigerant charge faults and faults associated with the flow rate of secondary fluids have on the performance of a heat pump operating in summer season and we developed a correlation to detect and diagnose these faults using multiple linear regression. The faults considered include simultaneous refrigerant charge and indoor heat exchanger secondary fluid flow rate faults (IFRFs), simultaneous refrigerant charge and outdoor heat exchanger secondary fluid flow rate faults (OFRFs) and simultaneous refrigerant charge, IFRF and OFRF. The occurrence of simultaneous refrigerant charge fault, IFRF and OFRF caused up to a 5.7% and 8% decrease in cooling capacity compared to simultaneous refrigerant charge and indoor heat exchanger secondary fluid flow rate faults, and simultaneous refrigerant charge and outdoor heat exchanger secondary fluid flow rate faults, respectively. Simultaneous refrigerant charge fault, IFRF and OFRF resulted in up to an 11.6% and 5.9% decrease in COP of the heat pump unit compared to simultaneous refrigerant charge fault and IFRF, and simultaneous refrigerant charge fault and OFRF, respectively. The developed FDD correlations accurately predicted the simultaneous refrigerant charge and faults in the flow rate of the secondary fluid within an error margin of 7.7%.

KW - Brine flow rate fault

KW - COP

KW - Cooling capacity

KW - Fault detection

KW - Fault diagnosis

KW - Heat pump

KW - Refrigerant charge fault

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DO - 10.3390/en14133877

M3 - Article

AN - SCOPUS:85109370413

SN - 1996-1073

VL - 14

JO - Energies

JF - Energies

IS - 13

M1 - 3877

ER -

Fault detection algorithm for multiple-simultaneous refrigerant charge and secondary fluid flow rate faults in heat pumps

Abstract

Bibliographical note

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

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