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Derek Noël currently works as a research engineer at EDF R&D. Derek does research in Residential Buildings and Energy Policies.
For residential heat pumps, R32 becomes one of the most widely used refrigerant, thanks to an environmental impact much lower than R410A. However, with a classic suction superheat control, R32 induces higher discharge temperatures. Two-phase suction is thus generally allowed in rotary compressors to lower the discharge temperature. In theory, this...
There is no reliable in situ measurement method of air-to-air heat pump seasonal heating performances. Several methods were previously developed but they were only validated in steady-state conditions. In real life, dynamic sequences such as defrost cycle and starting phases occur, which are not considered in these methods. The goal of this work is...
La pompe à chaleur est l’une des clés de la réduction des émissions de gaz à effet de serre dans les bâtiments. Ses performances in-situ dépendent de nombreux facteurs, et la mesure embarquée est alors nécessaire afin de connaître les performances réelles de chaque installation. Une méthode de mesure précédemment développée est présentée puis valid...
The heat pump technology answers to the three key targets of the European Union climate action by reducing greenhouse gas emissions, increasing renewable energy share and improving energy efficiency of buildings. In standard conditions, heat pumps can reach very high coefficients of performance (COPs). However, the in-situ COPs are poorly known and...
Thanks to their high theoretical efficiency, residential heat pumps (HP) are a promising technology when attempting to reduce the energy consumption of heating in dwellings. Evaluation of their real performances on-field is thus crucial to guarantee their efficiency. However, measuring accurately real heating capacity of air-to-air HP is not easy,...
Abstract. An innovative hydraulic design was studied for corrugated tube geometry for a heat exchanger. An ellipse based double corrugation was used as a concept of the geometry. The hydraulic diameter (Dh) is maintained over the tube length while the shape of the cross section varies continuously along the flow direction. 38 corrugated tubes with...