Can you hear it? Reducing the sound power of heat pumps to ambient noise level 
Despite the advantages heat pumps provide in terms of CO2 emission reduction, with increasing numbers of installed and operated heat pumps increasingly more sources of noise are deployed. As noise is one of the most underestimated sources of illnesses, there is chance that the acceptance of heat pumps suffers or to avoid that strict legislation to protect people from noise are enacted. Therefore, for example a major share of heat pumps must be operated in part load operation over night to be within the given limits. At the same time a high share of heating is required over the night hours. The presentation will introduce the latest development in axial fan technology which can provide a solution to both issues. It will show the potential of axial fans applied in heat pump which are specifically developed to achieve the lowest possible noise level including lowest tonality in that application to avoid part load operation over night or reduce the related power loss. The low noise fan (FP-series) will be introduced, including several comparisons with current state-of-the-art axial fan solutions. The comparison will be related to the relevant built in situation in several outdoor evaporator units of heat pumps, whereas only the fan has been exchanged and an adoption of the axial position was conducted. All comparison will not be provided on calculation but on actual measurements. Additionally, solutions of common issues mostly related with acoustics and efficiency in the built-in situation will be provided. This covers the influence of guard grilles, the shape of bell mouths etc.
--- Datum: 26.10.2021 Uhrzeit: 15:45 - 16:10 Uhr Ort: Saal Brüssel, NCC Mitte