adata pengamatan pompa sentrifugal
DESCRIPTION
sentriTRANSCRIPT
I. Data Percobaan Data Pengamatan Pompa Kecepatan Putaran (N) = 1200 rpmPada V = 20 Liter dan t = 8 sH orifice (m Hg)H1 (m Hg)H2 (m Hg)Hs (m w g)Hd (m w g)W (Kg)
0.0150.5400.4470.400.50.6170
0.0400.5640.4250.401.00.9677
0.0350.5680.4320.401.00.8728
0.0400.5850.4500.401.01.0215
Data Pengamatan Pompa Kecepatan Putaran (N) = 1350 rpmPada V = 20 Liter dan t = 7 sH orifice (m Hg)H1 (m Hg)H2 (m Hg)Hs (m w g)Hd (m w g)W (Kg)
0.0250.5250.4630.300.10.7194
0.0330.5400.4550.231.00.6171
0.0280.5700.4150.301.00.7163
0.0400.5900.4000.402.00.7164
Data Pengamatan Pompa Kecepatan Putaran (N) = 1425 rpmPada V = 20 Liter dan t = 5.5 sH orifice (m Hg)H1 (m Hg)H2 (m Hg)Hs (m w g)Hd (m w g)W (Kg)
0.0400.5500.4300.401.00.7705
0.0350.5530.4400.301.00.7960
0.0300.5550.4400.371.00.7705
0.0350.5700.4300.301.50.8187
Data Pengamatan Pompa Kecepatan Putaran (N) = 1575 rpmPada V = 20 Liter dan t = 5.6 sH orifice (m Hg)H1 (m Hg)H2 (m Hg)Hs (m w g)Hd (m w g)W (kg)
0.0380.5750.4330.401.00.8729
0.0380.5700.4400.401.50.8903
0.0400.5900.4500.302.00.9718
0.0400.5650.4400.401.00.8943
Data Pengamatan Pompa Kecepatan Putaran (N) = 1775 rpmPada V = 20 Liter dan t = 5.1 sH orifice (m Hg)H1 (m Hg)H2 (m Hg)Hs (m w g)Hd (m w g)W (Kg)
0.0500.5900.4250.601.51.2346
0.0530.5950.4250.501.81.1319
0.0530.6000.4130.501.51.1319
0.0550.6240.3900.502.31.2346
II. Pengolahan Data Menghitung Laju Alir (Q)
Perhitungan dengan menggunakan cara tak langsung Perhitungan Head Pompa Rumus : H = ( )+ VHC + ZPerhitungan dengan menggunakan cara langsung Perhitungan Head Pompa Rumus : H = (Hd )+ VHC + Z
VHC = Q2 x 21.300Keterangan Hs : Tinggi permukaan air raksa manometer pipa suction (m)Hd : Tinggi permukaan air raksa manometer pipa discharge (m)Z : Perbedaan tinggi pengukuran suction & discharge (0,3 m)VHC : Velocity head correction Ug : Densitas air raksa (13.600 Kg/m3)Uw : Densitas air (1000 Kg/m3)
Perhitungan Daya Dinamometer pompa Rumus : No = W L g n KeteranganW : Beban untuk kesetimbangan dinamometer (kg) L : Panjang lengan torsi = 200mm = 0,2 m n : Kecepatan putaran dinamometer (rad/s) n = N (2 / 60) (rad / s) N : Kecepatan putaran dinamometer (rpm) g : Gaya gravitasi (9,8 m/s2) Perhitungan Efisiensi Pompa Rumus : = [Nh/Np] x 100 %KeteranganNh : Daya hidrolik (watt)Nh = Q w g H Uw : Densitas air (kg/m3)Np : Daya yang dibutuhkan pompa (watt)Np = No - NtNt : Antara 100 150 Watt
III. Hasil PerhitunganA. Hasil Perhitungan1. Secara LangsungN (rpm)BukaanValveQ x 10-3 (m3/s)H PompaNo (watt)Nh (watt)Np (watt) (%)
1200Tap 12.500.5331151.890613.060951.8906690.8362
Tap 21.0331238.224525.3109588.224528.683
Tap 31.0331214.862425.3109564.862439.0225
Tap 41.0331251.468825.31095101.468824.9446
1350Tap 12.860.2742199.23647.6852844.23647.5740
Tap 21.2442170.904634.8724420.9046166.8171
Tap 31.1742198.377932.9104748.377968.0278
Tap 42.0742198.405558.1356848.405558.1250
1425Tap 13.641.1822563.108442.17144413.108410.2083
Tap 21.2822232.697945.7386482.243355.6138
Tap 31.2122225.243343.2416075.243357.4690
Tap 41.7822239.333863.5746489.333371.1657
1575Tap 13.571.1175282.039239.09686132.039229.6100
Tap 21.6175287.661356.58986137.661341.1080
Tap 32.2715313.994479.4707163.994448.4594
Tap 41.1175288.953739.09686138.953728.1366
1775Tap 13.921.5273449.553458.67276299.553419.5881
Tap 21.9273412.157474.03916262.157428.2423
Tap 31.1273412.157443.30636262.157416.5192
Tap 42.6273449.5534100.9304299.553433.6936
2. Secara Tak LangsungN (rpm)BukaanValveQ x 10-3 (m3/s)H PompaNo (watt)Nh (watt)Np (watt) (%)
1200Tap 12.501.6049151.890639.320051.89062079.7657
Tap 22.1845238.224553.5202588.224560.6637
Tap 32.1467214.862452.5941564.862481.0857
Tap 42.1341251.468852.28545101.468851.5286
1350Tap 12.861.2554199.236435.1863544.236434.6770
Tap 21.5452170.904643.3088920.9046207.1740
Tap 32.4272198.377968.0295648.3779140.6212
Tap 42.8682198.405580.3899148.4055166.0760
1425Tap 13.642.0942563.108474.7043413.108418.0834
Tap 22.006232.697971.5580382.243387.0077
Tap 32.0312225.243372.4569775.243396.2969
Tap 42.3462239.333883.6936489.333393.6869
1575Tap 13.572.3607282.039282.59145132.039262.7779
Tap 22.2095287.661377.30157137.661356.1535
Tap 32.3355313.994481.7098163.994449.8248
Tap 42.1465288.953775.09745138.953754.0449
1775Tap 13.922.7063449.5534103.9652299.553434.7067
Tap 22.7693412.1574106.38543262.157440.5807
Tap 32.9835412.1574114.6141262.157443.7196
Tap 43.5757449.5534137.3641299.553445.8563
IV. Hasil Percobaan Grafik Laju Alir (Q) Terhadap Head Pompa (Secara Langsung)
Grafik Laju Alir (Q) Terhadap Head Pompa (Secara Tidak Langsung)
Grafik Laju Alir (Q) Terhadap Daya Dinamometer Pompa (No)
Grafik Laju Alir (Q) Terhadap Efisiensi Pompa () (Secara Langsung)
Grafik Laju Alir (Q) Terhadap Efisiensi Pompa () (Secara Tidak Langsung)
Lampiran Gambar PraktikumNo.Gambar AlatKeterangan
1.Satu Set Alat Pompa Sentrifugal (Dalam keadaan shutdown).
2.Skema aliran alat.
3.Tangki Pompa dengan
4.Beban yang digunakan untuk menyeimbangkan tangki pompa.
5.Pipa Ventutimeter.
6.Rumah pompa yang berisi setengah isian air.
7.
8.Pipa suction yang menghubungkan aliran masukan ke ruang pompa sentrifugal.
9.Pipa discharge yang mengalirkan air keluaran pompa.