Abstract
This paper discusses fault detection of improper refrigerant charge for heat pump system using model-based method. In this study, we employed normalized distance method for fault detection classifier. Normalized distance method identifies a fault by statistically different between the current residuals and the expected residuals. Compressor speed, outdoor air dry bulb temperature, and indoor air dry bulb temperature are selected as independent variables of fault-free reference model. Dependent variables select compressor discharge temperature, condenser temperature, evaporator temperature, superheat temperature, subcool temperature, and total current. In this study, we developed fault-free reference model using experimental characteristic data of heat pump system under normal operation. Sensitivity analysis of fault detection was carried out with respect of fault progress. Fault detection using normalized distance method proposed in this study predicts accurately failure mode for improper refrigerant charge.
| Original language | English |
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| Title of host publication | ACRA 2014 - Proceedings of the 7th Asian Conference on Refrigeration and Air Conditioning |
| Publisher | Society of Air-conditioning and Refrigerating Engineers of Korea, SAREK |
| Publication status | Published - 2014 |
| Event | 7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014 - Jeju Island, Korea, Republic of Duration: 2014 May 18 → 2014 May 21 |
Other
| Other | 7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014 |
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| Country/Territory | Korea, Republic of |
| City | Jeju Island |
| Period | 14/5/18 → 14/5/21 |
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics
- Control and Systems Engineering
- Mechanical Engineering