Fault Detection Algorithm for Multiple-Simultaneous Refrigerant Charge and Secondary Fluid Flow Rate Faults in Heat Pumps
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/13/3877 |
| _version_ | 1797528529865277440 |
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| author | Samuel Boahen Kwesi Mensah Selorm Kwaku Anka Kwang Ho Lee Jong Min Choi |
| author_facet | Samuel Boahen Kwesi Mensah Selorm Kwaku Anka Kwang Ho Lee Jong Min Choi |
| author_sort | Samuel Boahen |
| collection | DOAJ |
| description | 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%. |
| first_indexed | 2024-03-10T10:00:38Z |
| format | Article |
| id | doaj.art-65cc5aecd4d74742893e646164bbb6a5 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T10:00:38Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-65cc5aecd4d74742893e646164bbb6a52023-11-22T01:59:31ZengMDPI AGEnergies1996-10732021-06-011413387710.3390/en14133877Fault Detection Algorithm for Multiple-Simultaneous Refrigerant Charge and Secondary Fluid Flow Rate Faults in Heat PumpsSamuel Boahen0Kwesi Mensah1Selorm Kwaku Anka2Kwang Ho Lee3Jong Min Choi4Department of Mechanical Engineering, Kwame Nkrumah University of Science and Technology, Kumasi AK-039-5028, GhanaGraduate School of Mechanical Engineering, Hanbat National University, Daejeon 34158, KoreaGraduate School of Mechanical Engineering, Hanbat National University, Daejeon 34158, KoreaDepartment of Architecture, Korea University, Seoul 02741, KoreaDepartment of Mechanical Engineering, Hanbat National University, Daejeon 34158, KoreaThe 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%.https://www.mdpi.com/1996-1073/14/13/3877heat pumpfault detectionfault diagnosiscooling capacityCOPrefrigerant charge fault |
| spellingShingle | Samuel Boahen Kwesi Mensah Selorm Kwaku Anka Kwang Ho Lee Jong Min Choi Fault Detection Algorithm for Multiple-Simultaneous Refrigerant Charge and Secondary Fluid Flow Rate Faults in Heat Pumps Energies heat pump fault detection fault diagnosis cooling capacity COP refrigerant charge fault |
| title | Fault Detection Algorithm for Multiple-Simultaneous Refrigerant Charge and Secondary Fluid Flow Rate Faults in Heat Pumps |
| title_full | Fault Detection Algorithm for Multiple-Simultaneous Refrigerant Charge and Secondary Fluid Flow Rate Faults in Heat Pumps |
| title_fullStr | Fault Detection Algorithm for Multiple-Simultaneous Refrigerant Charge and Secondary Fluid Flow Rate Faults in Heat Pumps |
| title_full_unstemmed | Fault Detection Algorithm for Multiple-Simultaneous Refrigerant Charge and Secondary Fluid Flow Rate Faults in Heat Pumps |
| title_short | Fault Detection Algorithm for Multiple-Simultaneous Refrigerant Charge and Secondary Fluid Flow Rate Faults in Heat Pumps |
| title_sort | fault detection algorithm for multiple simultaneous refrigerant charge and secondary fluid flow rate faults in heat pumps |
| topic | heat pump fault detection fault diagnosis cooling capacity COP refrigerant charge fault |
| url | https://www.mdpi.com/1996-1073/14/13/3877 |
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