Performance of a Residential Heat Pump Operating in the Cooling Mode With Single Faults Imposed

Published

September 1, 2006

Author(s)

William V. Payne, Piotr A. Domanski, Minsung Kim, Christian Hermes

Abstract

System behavior of a R410A residential unitary split heat pump system operating in the cooling mode was investigated. Seven artificial faults were implemented: compressor/reversing valve leakage, improper outdoor air flow, improper indoor air flow, liquid line restriction, refrigerant undercharge, refrigerant overcharge, and presence of non-condensable gas in the refrigerant. Since the cooling mode expansion device was a thermostatic expansion valve (TXV), the system could adapt itself to considerable external variation. Thus, faulty behavior was not as detectable as it would have been in a system equipped with a fixed area expansion device. The distinctiveness of a fault depended on the TXV status. Heat exchanger faults effects upon performance depend on the sizing of the heat exchanger. Using the fault test database, a rule-based chart was proposed to detect and diagnose the fault. The effect of the various fault levels on EER was also estimated.

Citation

International Journal of Heating, Ventilating, Air-conditioning and Refrigerating Research

Volume

29

Pub Type

Journals

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Keywords

fault diagnosis, heat pump fault detection, rule based decision chart, thermostatic expansion valve

Citation

Payne, W. , Domanski, P. , Kim, M. and Hermes, C. (2006), Performance of a Residential Heat Pump Operating in the Cooling Mode With Single Faults Imposed, International Journal of Heating, Ventilating, Air-conditioning and Refrigerating Research, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=861036 (Accessed October 16, 2025)