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In situ measurement methods of air to air heat pump performance

Abstract : There is no in situ reliable measurement method of air-to-air heat pump heating performances. This paper tests and validates two methods in laboratory and in steady-state conditions. The first method based on refrigerant fluid measurements determines the refrigerant flow rate by using the compressor thermal balance. In particular, the evaporation pressure is measured by a saturation temperature measurement and the compressor ambient heat losses are evaluated from the heat exchanges. The method uses only non-intrusive sensors, except for the condensation pressure sensor installed at the refrigerant charging plug. The second method based on air measurements determines the air flow rate via a multi-point velocity measurement. According to the experimental results, these methods are fully applicable on field with deviations of 4% and 10%, for the refrigerant method and the air method respectively, when compared to the "etalon" measurement.
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Submitted on : Tuesday, November 5, 2013 - 2:57:31 PM
Last modification on : Monday, June 27, 2022 - 3:02:03 AM




Cong-Toan Tran, Philippe Rivière, Dominique Marchio, Christine Arzano-Daurelle. In situ measurement methods of air to air heat pump performance. International Journal of Refrigeration, Elsevier, 2013, 36 (5), pp.1442-1455. ⟨10.1016/j.ijrefrig.2013.03.021⟩. ⟨hal-00880157⟩



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