Studi Eksperimen Aliran Melalui Square Duct Dan Square Elbow 90o Dengan Double Guide Vane Pada Variasi Sudut Bukaan Damper

Nazar, Andrew Jaya (2016) Studi Eksperimen Aliran Melalui Square Duct Dan Square Elbow 90o Dengan Double Guide Vane Pada Variasi Sudut Bukaan Damper. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Instalasi saluran udara tidak hanya berupa pipa lurus, tetapi juga terdapat fitting/aksesoris perpipaan misalnya elbow 90o dan damper. Aksesoris perpipaan ini berfungsi agar saluran udara dapat terpasang sesuai dengan kebutuhan. Namun, penggunaan aksesoris perpipaan ini menyebabkan bertambahnya pressure drop akibat adanya friction loss dan separation loss. Pemasangan guide vane pada elbow 90o diharapkan dapat mengurangi pressure drop karena dapat mengurangi terjadinya secondary flow, namun hal ini dapat menambah kerugian akibat gaya gesek. Saat ini penghematan energi menjadi sorotan terutama dalam dunia industri. Penurunan pressure drop pada belokan perpipaan sangat diharapkan, agar dapat menghemat energi lebih. Untuk itu perlu dilakukan usaha agar dapat menurunkan pressure drop yang terjadi. Penelitian ini dilakukan secara eksperimen dengan benda uji saluran udara yang terdiri dari: upstream duct (straight duct), square elbow 90o dengan r/Dh=1,5 dan dilengkapi double guide vane, damper, downstream duct (straight duct), dan induced fan. Pengukuran parameter yang dibutuhkan dilakukan dengan menggunakan: pitot tube, inclined manometer, pressure tranducer. Pengujian dilakukan dengan variasi sudut damper 0o, 10o, 20o, 30o yang diputar secara CCW dengan Re=7,87x104 untuk mendapatkan profil kecepatan bidang vertikal dan horziontal, sedangkan untuk mengetahui pressure drop yangii terjadi dilakukan pada beberapa variasi nilai Re yang berbeda, yaitu 3,99x104; 4,73x104; 5,52x104; 6,3x104; 7,09x104; 7,87x104; 8,67x104; 9,46x104. Dari eksperimen ini diperoleh bahwa profil kecepatan pada masing-masing variasi sudut bukaan damper sudah mendekati keadaan recovery aliran pada akhir section baik dari bidang vertikal maupun horizontal. Pressure drop yang terjadi semakin naik seiring dengan bertambahnya nilai bilangan Reynolds dan sudut bukaan damper. Nilai konstanta damper semakin naik dari bukaan sudut 0o hingga 30o ======================================================================================================== Installation of air ducts not only in the form of a straight pipe, but also there is a piping accessories, eg 90 ° elbow and damper. Piping accessories function so that the air ducts can be installed as needed. However, the use of this piping accessories will increase the pressure drop due to friction loss and separation loss. Installation guide vane at 90o elbow is expected to reduce pressure drop because it can reduce the occurrence of secondary flow, but it can add to losses due to friction forces. Currently the energy savings in the spotlight, especially in the industrial world. Decreasing pressure drop in the piping bends are highly desirable, in order to conserve more energy. It is necessary for businesses to be able to lower the pressure drop that occurs. This research was done experimentally with the test object air duct consisting of: upstream duct (straight duct), square elbow 90 o with r / Dh = 1,5 and include double guide vane, damper, downstream duct (straight duct), and induced fan , Measurement parameters are required to do by using: pitot tube, inclined manometer, pressure transducer. Testing was done by varying the angle damper 0o, 10 o, 20 o, 30 o rotated CCW by Re = 7,87x104 to get vertical and horizontal plane velocity profile, while to know the pressure drop that occurs is done in several different variations of Re values, are 3,99x104; 4,73x104; 5,52x104; 6,3x104; 7,09x104; 7,87x104; 8,67x104; 9,46x104.iv From these experiments showed that the velocity profile at each variation damper opening angle is approaching a state of recovery flow at end section of the field either vertically or horizontally. Pressure drop is happening farther up along with increasing the value of the Reynolds number and opening angle of the damper. Constant value of damper are increasingly rising on the opening angle of 0 ° to 30 °

Item Type: Thesis (Undergraduate)
Additional Information: RSIf 620.106 4 Naz s
Uncontrolled Keywords: elbow 90o dengan double guide vane; damper; karakteristik aliran setelah elbow
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ935 Pipe--Fluid dynamics.
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 23 Apr 2020 01:42
Last Modified: 23 Apr 2020 01:43
URI: http://repository.its.ac.id/id/eprint/75884

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