Hidayat, Septian (2020) Studi Eksperimen Evaluasi Head Loss Pada Cussons Friction Loss In Pipe Apparatus Dengan Modifikasi Orifice Dan Penggunaan Gate Valve, Globe Valve, Dan Ball Valve. Other thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
02111640000210-Undergraduate_Thesis.pdf Download (3MB) | Preview |
Abstract
CUSSONS friction loss in pipe apparatus adalah salah satu perangkat pengujian head loss perpipaan berupa instalasi sistem perpipaan yang ada di Laboratorium Mekanika dan Mesin-Mesin Fluida. Analisa head loss meliputi head loss mayor dan head loss minor.
Sistem perpipaan yang digunakan pada peralatan uji CUSSONS friction loss in pipe apparatus menggunakan bahan material Polyvinyl Chloride (PVC) dan Acrylic. Fitting perpipaan terdiri atas long radius elbow 90°, standard radius elbow 90°, elbow 45°, sudden enlargement, sudden contraction, orifice, gate valve, glove valve, dan ball valve. Beberapa pressure tap dihubungkan dengan manometer raksa dengan specific gravity (SG) 13,6. Head loss pipa dianalisis menggunakan formulasi Swamee-Jain dan persamaan Darcy Weisbach. Pompa sentrifugal single stage digerakkan oleh motor pompa MQC 175 dengan daya pompa 300 Watt dan putaran 2850 RPM. Pengujian melibatkan pengukuran pada tekanan suction dan discharge pompa. Pompa dapat beroperasi pada kapasitas maksimal 100 L/min. Pengujian menggunakan variasi debit pada debit 0 L/min hingga debit maksimal 100 L/min pada diameter 1 in dan 3/4 in dengan kenaikan 2 L/min. Modifikasi juga dilakukan pada line II dengan penambahan orifice (β=0,6) dan pada line III dengan penambahan gate valve, globe valve, dan ball valve.
Dari hasil eksperimen diperoleh grafik hubungan friction factor (f) terhadap Reynolds number (Re) dan relative roughness (e/D) pada line I yang berbahan PVC dan line III yang berbahan acrylic. Nilai f pada pipa akan turun seiring dengan kenaikan Reynolds number dan nilai e/D konstan terhadap Reynolds number yang semakin besar. Pada pengujian head loss minor, diperoleh grafik hubungan loss coefficient (K_L ) terhadap Reynolds number (Re) pada masing-masing fitting yang digunakan pada line IV dan juga pada gate valve, globe valve, dan ball valve pada line III. Seiring dengan bukaan valve yang diperkecil maka head loss yang dihasilkan semakin besar. Pada pengujian orifice (β=0,6) didapatkan grafik hubungan discharge coefficient (C_D ) terhadap Reynolds number (Re). Dengan rasio β yang dinaikkan dari 0,5 menjadi 0,6 maka nilai discharge coefficient yang dihasilkan juga meningkat seiring dengan kenaikan Reynolds number. Pada performa pompa, BEP didapatkan pada kapasitas 50 L/min dengan efisiensi tertinggi 43,27% dan titik operating point tidak dijumpainya pada kurva karakteristik kerja pompa. Penelitian dilakukan pada aliran turbulen hingga debit 50 L/min.
======================================================================================================================
CUSSONS friction loss in pipe apparatus is one of the testing devices for head loss piping as an installed piping system in the Laboratory of Mechanics and Fluid Machines. The analysis of head loss covers head loss major and head loss minor.
Piping system used on test equipment CUSSONS friction loss in pipe apparatus use Polyvinyl Chloride (PVC) and Acrylic materiasl. The piping fittings consist of long radius elbow 90˚, standard radius elbow 90˚, elbow 45˚, sudden enlargement, sudden contraction, orifice, gate valve, glove valve, and ball valve. Some pressure taps are linked with a mercury manometer with specific gravity (SG) 13,6. Head loss pipe is analyzed by using the Swamee-Jain formulations and Darcy Weisbach equations. A single stage centrifugal pump is driven by MQC 175 pump motor with 300 Watts pump power and 2850 RPM rotation. The test involves measuring on the suction and discharge pump. The pump can operate at maximum capacity 100 L/min. Testing use varying flow rate on 0 L/min to maximum flow rate 100 L/min at a diameter of 1 inch and 3/4 inch with a 2 L/min rise. Modifications are also made on line II with of orifice (β = 0.6) additions and on line III with the additions of the gate valve, the globe valve, and the ball valve.
The experiment acquired that there is the chart of friction factor (f) against Reynolds number (Re) and relative roughness (e/D) at line I with PVC material and line III with acrylic material. The f value on the pipe will go down as the increase of Reynolds number and the value e/D is constant toward Reynolds number which gets more increase. The testing of head loss minor is acquired that there is the chart of loss coefficient (K_L) against Reynolds number (Re) in each of the fittings used at line IV and also at the gate valve, the globe valve, and the ball valve on line III. As the valve openings receded, the resulting head loss gets more increase. At the testing of orifice (β = 0.6) it obtains the chart of discharge coefficient (C_D) against the Reynolds number (Re). With the ratio β raised from 0,5 to 0,6 so that the value of discharge coefficient resulted rises as Reynolds number mounts. At the pump performance, BEP is found at of 50 L/min capacity with a highest efficiency of 43.27% and the operating point point does not meet on the pump’s characteristic work point curve. The research is carried on turbulent flow to flow rate 50 L/min.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | head loss, friction factor, relative roughness, loss coefficient, discharge coefficient, Reynolds number =========================================================== head loss, friction factor, relative roughness, loss coefficient, discharge coefficient, Reynolds number |
| Subjects: | T Technology > TH Building construction > TH6840 Piping installation. Pipefitting |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | SEPTIAN HIDAYAT |
| Date Deposited: | 26 Aug 2020 02:27 |
| Last Modified: | 21 Jun 2023 14:58 |
| URI: | http://repository.its.ac.id/id/eprint/79483 |
Actions (login required)
 |
View Item |