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The beginning of this work is the achievement of a design tool, which is amultiple model software called " CODYRUN ", suitable for professionnals andusable by researchers. The original aspect of this software is that thedesigner has at his disposal a wide panel of choices between different heattransfer models More precisely, it consists in a multizone software integratingboth natural ventilation and moisture tranfers . This software is developed onPC micro computer and gets advantage of the Microsoft WINDOWS front-end. Mostof time, HVAC systems and specially domestic air conditioners, are taken intoaccount in a very simplified way, or in a elaborated one. On one side,they arejust supposed to supply the demand of cooling loads with an ideal control loop(no delay between the sollicitations and the time response of the system), Theavailable outputs are initially the hourly cooling and heating consumptionswithout integrating the real caracteristics of the HVAC system This paper isalso following the same multiple model approach than for the building modellingby defining different modelling levels for the air conditionning systems, froma very simplified one to a detailled one. An experimental validation isachieved in order to compare the sensitivity of each defined model and to pointout the interaction between the thermal behaviour of the envelop and theelectrical system consumption. For validation purposes, we will describe thedata acquisition system. and the used real size test cell located in theUniversity of Reunion island, Indian Ocean.

Multiple model approach and experimental validation of a residential air-to-air heat pump