The effect of hand dryer fan parameter on noise and aerodynamic level

Cheak, Celina Mei Min (2022) The effect of hand dryer fan parameter on noise and aerodynamic level. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The aim of this research is to improve the cunent design of the hand dryer by manipulating different input parameters that can be implemented to optimise the output responses. The input parameters are defined in terms of two aspects which are the type of nozzle design and the type of insulation. Whereas the output responses to be evaluated are the air velocity in (MPH), noise level in (dB) and drying time in (s). The method of conducting this research is by implementing the Full Factorial design in the Design of Experiment (DoE) with a total of 9 runs of experiments provided with 2 factors at 3 levels. The chrome nozzle, concentrator nozzle and diffuser nozzle represent the type of nozzle design whereas the egg carton, wedge and pyramid acoustic foam represent the type of insulation. The results revealed that the best combination suggested by the Design Expert software are the chrome nozzle with wedge foam and pyramid foam as the nozzle installed at the air outlet and also used as insulations in the internal motor housing of the hand dryer, respectively. All three of these parameters combination has given the most desirable output and have achieved the aim of this project which is to have the lowest noise level, shortest drying time and highest air velocity. Furthermore, this has also proven that the effect of hand dryer fan parameter which involved the combination of chrome nozzle with wedge foam and pyramid foam has produced the greatest impact on the reduction of noise level and aerodynamic level of the hand dryer.

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