Development of airflow resistivity system with rapid prototyping and Arduino configuration

Zaiham, Nur Afiqah Aina (2023) Development of airflow resistivity system with rapid prototyping and Arduino configuration. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The purpose of this study is to broaden the scope of research on natural fiber acoustic since there have been least studies on air flow through natural fiber. Besides that, to provide the further research with exposure to these types of devices and to get the data faster and more accurately compared to the previous research. An existing low-cost airflow test rig was design with improvement in certain part with the ability to analyse a variety of samples using an Arduino configuration. This can contribute to enhance awareness of the various types of natural fibres and, in turn, limit the use of synthetic fiber in industry. The objective of this study is to design an improvement on existing airflow test rig. Next, to developed the improved test rig using 3D printing machine. Lastly, to analyse the airflow resistivity on different thickness of the durian inner peel fiber using airflow test rig with the aid of Arduino configuration. To accomplish the first objective of this project, which is to design an improvement on existing airflow test rig, the morphology chart, conceptual design, and Pugh method were employed. The concept design 3 with highest total score in Pugh method was chosen as the best concept design compared to the other designs. Besides that, in order to achieve the second objective which is a development of improved test rig using 3D printing machine, it can be done by using Farsoon 402P Selective Laser Sintering (SLS) 3D printing machine available in university. Furthermore, to achieve the third objective of this project which is to analyse the airflow resistivity on different thickness of the durian inner peel fiber, it needs to be analysed through the testing when the air passes through the specimen using an airflow test rig. In order to get the value of differential pressure and output velocity accurately through this testing, it can be obtained with the aid of Arduino configuration and anemometer. The results show the output velocity become lower, meanwhile the differential pressure become higher as the thickness of the specimen increases. However, the airflow resistivity can be obtained from the manual calculation. Based on the results, the specimen with higher thickness will result in lower airflow resistivity. These airflow resistivity data, whether at low or high speed, are significant after being analysed using linear regression method. The linear regression analysis of variance table with P-value less than 0.05 is shown in this statistical method analysis at both speeds. Due to the microstructure and the arrangement of the durian inner peel fiber is greater, it has been chosen as a natural fiber acoustic to be used for this research. In this case, lower airflow resistivity considered as the best sound absorption coefficient as the least amount of sound velocity can penetrates the fiber.

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