An expert rule-based fault diagnosis strategy for variable refrigerant flow air conditioning systems
•A rule-based fault diagnosis strategy is proposed for the VRF system.•22 expert rules are developed through expert knowledge and characteristics of the VRF system.•The fault diagnosis strategy is evaluated with data of nine faults types under cooling mode.•Nine faults are well diagnosed by the rule...
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Veröffentlicht in: | Applied thermal engineering 2019-02, Vol.149, p.1223-1235 |
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creator | Guo, Yabin Wang, Jiangyu Chen, Huanxin Li, Guannan Huang, Ronggeng Yuan, Yue Ahmad, Tanveer Sun, Shaobo |
description | •A rule-based fault diagnosis strategy is proposed for the VRF system.•22 expert rules are developed through expert knowledge and characteristics of the VRF system.•The fault diagnosis strategy is evaluated with data of nine faults types under cooling mode.•Nine faults are well diagnosed by the rule-based fault diagnosis strategy.
This paper proposed a novel fault diagnosis strategy of the variable refrigerant flow (VRF) system based on expert rules for the first time. The VRF fault diagnosis rules (VFDR) are obtained through the expert knowledge and characteristics of the VRF system. The VFDR includes a total of 22 expert rules, 10 rules for the outdoor unit and other 12 rules for the indoor unit. The proposed VFDR can help maintenance personnel to identify and eliminate VRF faults in time. In addition to obtaining the coefficients of the sensor regression model, the VFDR does not require a training process and is computationally simple, making it easily embedded in the building’s automatic control system to achieve online fault diagnosis. The proposed fault diagnosis strategy is validated with nine faults of the VRF system under cooling mode. These faults contain temperature sensor faults, the system fault and indoor unit faults. The diagnosis correct rate (DCR) is used to evaluate the performance of the VFDR. Through expert rules fault diagnosis strategy, the DCRs of all faults exceed 70% and the overall DCR of all faults is 85.13%. The results show that faults of VRF system are well diagnosed by fault diagnosis strategy based on expert rules. |
doi_str_mv | 10.1016/j.applthermaleng.2018.12.132 |
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This paper proposed a novel fault diagnosis strategy of the variable refrigerant flow (VRF) system based on expert rules for the first time. The VRF fault diagnosis rules (VFDR) are obtained through the expert knowledge and characteristics of the VRF system. The VFDR includes a total of 22 expert rules, 10 rules for the outdoor unit and other 12 rules for the indoor unit. The proposed VFDR can help maintenance personnel to identify and eliminate VRF faults in time. In addition to obtaining the coefficients of the sensor regression model, the VFDR does not require a training process and is computationally simple, making it easily embedded in the building’s automatic control system to achieve online fault diagnosis. The proposed fault diagnosis strategy is validated with nine faults of the VRF system under cooling mode. These faults contain temperature sensor faults, the system fault and indoor unit faults. The diagnosis correct rate (DCR) is used to evaluate the performance of the VFDR. Through expert rules fault diagnosis strategy, the DCRs of all faults exceed 70% and the overall DCR of all faults is 85.13%. The results show that faults of VRF system are well diagnosed by fault diagnosis strategy based on expert rules.</description><identifier>ISSN: 1359-4311</identifier><identifier>EISSN: 1873-5606</identifier><identifier>DOI: 10.1016/j.applthermaleng.2018.12.132</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Air conditioners ; Air conditioning ; Automatic control systems ; Embedded systems ; Energy saving ; Expert rules ; Fault detection ; Fault diagnosis ; Flow velocity ; On-line systems ; Refrigerants ; Refrigeration ; Regression analysis ; Regression models ; Sensors ; Strategy ; Temperature sensors ; Variable refrigerant flow</subject><ispartof>Applied thermal engineering, 2019-02, Vol.149, p.1223-1235</ispartof><rights>2018 Elsevier Ltd</rights><rights>Copyright Elsevier BV Feb 25, 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c416t-d40f92efe3aea32421c7f15900e80ab55dc214d77e917a1c06b9e456ffd096623</citedby><cites>FETCH-LOGICAL-c416t-d40f92efe3aea32421c7f15900e80ab55dc214d77e917a1c06b9e456ffd096623</cites><orcidid>0000-0002-4350-1396</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.applthermaleng.2018.12.132$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Guo, Yabin</creatorcontrib><creatorcontrib>Wang, Jiangyu</creatorcontrib><creatorcontrib>Chen, Huanxin</creatorcontrib><creatorcontrib>Li, Guannan</creatorcontrib><creatorcontrib>Huang, Ronggeng</creatorcontrib><creatorcontrib>Yuan, Yue</creatorcontrib><creatorcontrib>Ahmad, Tanveer</creatorcontrib><creatorcontrib>Sun, Shaobo</creatorcontrib><title>An expert rule-based fault diagnosis strategy for variable refrigerant flow air conditioning systems</title><title>Applied thermal engineering</title><description>•A rule-based fault diagnosis strategy is proposed for the VRF system.•22 expert rules are developed through expert knowledge and characteristics of the VRF system.•The fault diagnosis strategy is evaluated with data of nine faults types under cooling mode.•Nine faults are well diagnosed by the rule-based fault diagnosis strategy.
This paper proposed a novel fault diagnosis strategy of the variable refrigerant flow (VRF) system based on expert rules for the first time. The VRF fault diagnosis rules (VFDR) are obtained through the expert knowledge and characteristics of the VRF system. The VFDR includes a total of 22 expert rules, 10 rules for the outdoor unit and other 12 rules for the indoor unit. The proposed VFDR can help maintenance personnel to identify and eliminate VRF faults in time. In addition to obtaining the coefficients of the sensor regression model, the VFDR does not require a training process and is computationally simple, making it easily embedded in the building’s automatic control system to achieve online fault diagnosis. The proposed fault diagnosis strategy is validated with nine faults of the VRF system under cooling mode. These faults contain temperature sensor faults, the system fault and indoor unit faults. The diagnosis correct rate (DCR) is used to evaluate the performance of the VFDR. Through expert rules fault diagnosis strategy, the DCRs of all faults exceed 70% and the overall DCR of all faults is 85.13%. The results show that faults of VRF system are well diagnosed by fault diagnosis strategy based on expert rules.</description><subject>Air conditioners</subject><subject>Air conditioning</subject><subject>Automatic control systems</subject><subject>Embedded systems</subject><subject>Energy saving</subject><subject>Expert rules</subject><subject>Fault detection</subject><subject>Fault diagnosis</subject><subject>Flow velocity</subject><subject>On-line systems</subject><subject>Refrigerants</subject><subject>Refrigeration</subject><subject>Regression analysis</subject><subject>Regression models</subject><subject>Sensors</subject><subject>Strategy</subject><subject>Temperature sensors</subject><subject>Variable refrigerant flow</subject><issn>1359-4311</issn><issn>1873-5606</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqNkEtLBDEQhAdRUFf_Q0CvM6Yzb_Ai4gsEL3oO2aQzZplNxk5W3X_vLOvFm6euQ1U19WXZJfACODRXq0JN05jekdZqRD8UgkNXgCigFAfZCXRtmdcNbw5nXdZ9XpUAx9lpjCvOQXRtdZKZG8_we0JKjDYj5ksV0TCrNmNixqnBh-gii4lUwmHLbCD2qcip5YiM0JIbkJRPzI7hiylHTAdvXHLBOz-wuI0J1_EsO7JqjHj-exfZ2_3d6-1j_vzy8HR785zrCpqUm4rbXqDFUqEqRSVAtxbqnnPsuFrWtdECKtO22EOrQPNm2WNVN9Ya3jeNKBfZxb53ovCxwZjkKmzIzy-lgL7tatFVMLuu9y5NIcZ5hJzIrRVtJXC54ypX8i9XueMqQciZ6xy_38dxXvLpkGTUDr1G4wh1kia4_xX9APqIjAg</recordid><startdate>20190225</startdate><enddate>20190225</enddate><creator>Guo, Yabin</creator><creator>Wang, Jiangyu</creator><creator>Chen, Huanxin</creator><creator>Li, Guannan</creator><creator>Huang, Ronggeng</creator><creator>Yuan, Yue</creator><creator>Ahmad, Tanveer</creator><creator>Sun, Shaobo</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><orcidid>https://orcid.org/0000-0002-4350-1396</orcidid></search><sort><creationdate>20190225</creationdate><title>An expert rule-based fault diagnosis strategy for variable refrigerant flow air conditioning systems</title><author>Guo, Yabin ; Wang, Jiangyu ; Chen, Huanxin ; Li, Guannan ; Huang, Ronggeng ; Yuan, Yue ; Ahmad, Tanveer ; Sun, Shaobo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c416t-d40f92efe3aea32421c7f15900e80ab55dc214d77e917a1c06b9e456ffd096623</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Air conditioners</topic><topic>Air conditioning</topic><topic>Automatic control systems</topic><topic>Embedded systems</topic><topic>Energy saving</topic><topic>Expert rules</topic><topic>Fault detection</topic><topic>Fault diagnosis</topic><topic>Flow velocity</topic><topic>On-line systems</topic><topic>Refrigerants</topic><topic>Refrigeration</topic><topic>Regression analysis</topic><topic>Regression models</topic><topic>Sensors</topic><topic>Strategy</topic><topic>Temperature sensors</topic><topic>Variable refrigerant flow</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Guo, Yabin</creatorcontrib><creatorcontrib>Wang, Jiangyu</creatorcontrib><creatorcontrib>Chen, Huanxin</creatorcontrib><creatorcontrib>Li, Guannan</creatorcontrib><creatorcontrib>Huang, Ronggeng</creatorcontrib><creatorcontrib>Yuan, Yue</creatorcontrib><creatorcontrib>Ahmad, Tanveer</creatorcontrib><creatorcontrib>Sun, Shaobo</creatorcontrib><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Applied thermal engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Guo, Yabin</au><au>Wang, Jiangyu</au><au>Chen, Huanxin</au><au>Li, Guannan</au><au>Huang, Ronggeng</au><au>Yuan, Yue</au><au>Ahmad, Tanveer</au><au>Sun, Shaobo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>An expert rule-based fault diagnosis strategy for variable refrigerant flow air conditioning systems</atitle><jtitle>Applied thermal engineering</jtitle><date>2019-02-25</date><risdate>2019</risdate><volume>149</volume><spage>1223</spage><epage>1235</epage><pages>1223-1235</pages><issn>1359-4311</issn><eissn>1873-5606</eissn><abstract>•A rule-based fault diagnosis strategy is proposed for the VRF system.•22 expert rules are developed through expert knowledge and characteristics of the VRF system.•The fault diagnosis strategy is evaluated with data of nine faults types under cooling mode.•Nine faults are well diagnosed by the rule-based fault diagnosis strategy.
This paper proposed a novel fault diagnosis strategy of the variable refrigerant flow (VRF) system based on expert rules for the first time. The VRF fault diagnosis rules (VFDR) are obtained through the expert knowledge and characteristics of the VRF system. The VFDR includes a total of 22 expert rules, 10 rules for the outdoor unit and other 12 rules for the indoor unit. The proposed VFDR can help maintenance personnel to identify and eliminate VRF faults in time. In addition to obtaining the coefficients of the sensor regression model, the VFDR does not require a training process and is computationally simple, making it easily embedded in the building’s automatic control system to achieve online fault diagnosis. The proposed fault diagnosis strategy is validated with nine faults of the VRF system under cooling mode. These faults contain temperature sensor faults, the system fault and indoor unit faults. The diagnosis correct rate (DCR) is used to evaluate the performance of the VFDR. Through expert rules fault diagnosis strategy, the DCRs of all faults exceed 70% and the overall DCR of all faults is 85.13%. The results show that faults of VRF system are well diagnosed by fault diagnosis strategy based on expert rules.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.applthermaleng.2018.12.132</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0002-4350-1396</orcidid></addata></record> |
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subjects | Air conditioners Air conditioning Automatic control systems Embedded systems Energy saving Expert rules Fault detection Fault diagnosis Flow velocity On-line systems Refrigerants Refrigeration Regression analysis Regression models Sensors Strategy Temperature sensors Variable refrigerant flow |
title | An expert rule-based fault diagnosis strategy for variable refrigerant flow air conditioning systems |
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