Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Diagnosing Fouling of Heat Exchangers of a Hybrid Heat Pump

하이브리드 열펌프 열교환기 오염 진단 연구

  • Shin, Younggy (Department of Mechanical Engineering, Sejong University)
  • Received : 2014.01.20
  • Accepted : 2014.04.09
  • Published : 2014.05.10
Download PDF
⟨ Previous Next ⟩

Abstract

A fault detector was developed for heat exchangers of a hybrid heat pump (HP) for household. The proposed detector can be applied directly to raw operating data. It is to monitor a tracking error between a measured saturation temperature and its state observer. The observer was estimated from a state-space model simulating dynamics of a heat exchanger. The real hybrid HP was substituted with a dynamic simulator that implemented two-phased heat transfer and was validated by experimental data. And artificial fault data were generated using the simulator. Diagnosing the data showed the following. The residual calculated from the state observer error shows a relatively robust consistency with respect fouling level. The fault detector is practically useful because it detects a threshold fouling beyond which the performance starts to deteriorate significantly.

Keywords

References

  1. Cui, J. and Wang, S., 2005, A model-based online fault detection and diagnosis strategy for centrifugal chiller systems, International Journal of Thermal Sciences, Vol. 44, pp. 986-999. https://doi.org/10.1016/j.ijthermalsci.2005.03.004
  2. Suzhou Samsung Electronics Co., 2013, Rotary compressor specification sheet(Model : UG8T260FUAJW).
  3. Li, B. and Alleyne, A. G., 2010, A dynamic model of a vapor compression cycle with shut-down and start-up operations, International Journal of Refrigeration, Vol. 33, pp. 538-552. https://doi.org/10.1016/j.ijrefrig.2009.09.011
  4. McKinley, T. L. and Alleyne, A. G., 2008, An advanced nonlinear switched heat exchanger model for vapor compression cycles using the moving-boundary method, International Journal of Refrigeration, Vol. 31, pp. 1253- 1264. https://doi.org/10.1016/j.ijrefrig.2008.01.012
  5. Shin, Y. G., Kim, J. H., and Yoo, B. J., 2013, Dynamic modeling and simulation of a hybrid heat pump, Korean Journal of Air-Condtioning and Refrigeration Engineering, Vol. 25, No. 7, pp. 406-412. https://doi.org/10.6110/KJACR.2013.25.7.406
  6. Shah, R., Alleyne, A. G., Bullard, C. W., Rasmussen, B. P., and Hrnjak, P. S., 2003, Dynamic modeling and control of single and multi-evaporator subcritical vapor compression systems, ACRC TR-216.
  7. Wu, X. and Cremaschi, L., 2012, Thermal and chemical analysis of fouling phenomenon in condensers for cooling tower applications, Proceedings, International Refrigeration and Air Conditioning Conference, Purdue.

Cited by

  1. Recent Progress in Air-Conditioning and Refrigeration Research: A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2014 vol.27, pp.7, 2015, https://doi.org/10.6110/KJACR.2015.27.7.380