Szukana fraza: [Abstrakt = "This paper presents results of experimental tests conducted in the Chair of Thermal En\-gineering of Poznan University of Technology dedicated to determination of efficiency of low\-power barrel fans. Operation parameters of fans produced for industry were checked with respect to the requirements of Directive 2009\/125\/EC of the European Parliament. Experimental tests allow determining the efficiency of fans and comparing them to values determined according to the European Directive. Test results are presented on graphs as functions of air volume flow. Those characteristics comprise distributions of total pressure, electric power absorbed by the motor and fan’s efficiency. Obtained results indicate that there is a need to develop new guidelines. They should concern those efficiencies of low\-power fans which are not covered by Directive 2009\/125\/EC of the European Parliament."]

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