kelengkapan sistem perpipaan
DESCRIPTION
Sistem Perpipaan D3 Teknik Kimia Univeritas Sebelas Maret SurakartaMata Kuliah Transportasi FluidaDosen Pengampu : Wusana Agung WibowoTRANSCRIPT
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Kelengkapan Sistem Perpipaan
Pengampu:Wusana Agung Wibowo
Transportasi Fluida D3
04/27/23 1
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Isi Kuliah
Pipelines (color and symbol) Alat ukur laju alir Alat ukur tekanan Alat ukur temperatur Jenis-jenis Valve Strainers dan filters Air vent Vacumm breaker Pressure safety valve
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Jenis fluida yg ditransportasikan
504/27/23
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Warna Pipa
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704/27/23
Joint
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Valve
Drain
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904/27/23
Support & hanger
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ALAT UKUR LAJU ALIR
1104/27/23
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Menurut prinsip Bernoulli, jika laju cairan meningkat, maka tekanan cairan menjadi kecil. Jadi tekanan zat cair pada penampang besar lebih besar dari tekanan zat cair pada penampang kecil (P1 > P2). Sebaliknya v2 > v1
P1 +1/2 ρ.v12 +ρ.g.h1 = P2 +1/2 ρ.v2
2 + ρ.g.h2
Karena P1>P2 dan v2>v1, maka persamaannya menjadi :P1-P2 = 1/2ρ.v2
2-1/2ρ.v12
P1-P2 = 1/2ρ(v22-v1
2)
Berdasarkan pers. Kontinuitas maka persamaannya menjadi :A1.v1 = A2.v2
v2 = A1.v1 A2
1. VENTURIMETER TANPA MANOMETER
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∆P = ρg∆hUntuk kasus di atas, persamaan ini bisa di ganti menjadi :P1 – P2 = ρgh persamaan BSekarang, kita ganti p1 – p pada persamaan 3, dengan p1 – p2 pada persamaan B
P1 – P2 = 1 ρv12 ( A1
2)-1 2 A2
2
ρgh = 1 ρv12 (A1
2)-1 2 A2
2 gh = 1 v12 (A1
2)-1 2 A2
2
2gh = v12 (A1
2)-1 A2
2
V12 = 2gh (A1
2)-1 A2
2
V1 = √ 2gh (A1)2-1 A2
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2. VENTURIMETER DENGAN MANOMETERV1 = A2 √2(ρ‘- ρ)gh/ ρ(A1
2 – A22)
V2 = A1 √2(ρ‘- ρ)gh/ ρ(A12 – A2
2)
KETERANGAN :ρ = MASSA JENIS ZAT CAIR PADA VENTURIMETER (kg/m3)ρ‘ = MASSA JENIS ZAT CAIR PADA MANOMETER (kg/m3) H = BEDA KETINGGIAN ZATCAIR PADA MANOMETER (m)
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SoalAir mengalir dalam sebuah venturimeter. Luas penampang 1 adalah 100 cm2 dan luas penampang 2 adalah 10 cm2. Jika perbedaan tinggi raksa pada manometer 3 cm, berapa kecepatan air yang masuk pada penampang 1?
PembahasanDiket: A1 = 100 cm2 = 10-2 m2
A2 = 10 cm2 = 10-3 m2
h = 3 cm = 0,03 m ρair = 1000 kg/m3
ρraksa = 13600 kg/m3
g = 9,8 m/sDit: v1 = ?Jawab: v1 = A2√2(ρraksa - ρair).g.h/ ρair (A1
2-A22)
v1 = 10-3√2.(13600-1000).(9,8)(0,03)/1000(10-4-10-6) = 0,273Jadi kecepatan air yang masuk adalah 0,273 m/s.
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3. Tabung Pitot P1 + ½ ρv12 = P2 + ½ ρv2
2 v2 = 0P1 + ½ ρv1
2 = P2
P2 – P1 = ½ ρv12 ------- persamaan 1
P2 – P1 = ρ’gh ---------- persamaan 2
½ . ρv12 = ρ ‘gh
ρV ρ12 = 2 ρ’gh
V1
2 = 2 ρ’gh/ ρ V1 = √2 ρ’gh/ ρ
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ALAT UKUR TEKANAN
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Mengukur Tekanan (fluida bergerak)a. Manometer tabung – terbuka
Pa – P = ρm.g.h1
P = Pa – ρm.g.h1
b. Tabung Prantl
P2 = P + ½. ρ.v2
Pa – P2 = ρm.g.h2
P2 = P + ½. ρ.v2 = Pa - ρm.g.h2
44
P
h1 Pa
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P2
h2Pa
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Analog Pressure Gauge meter
4504/27/23
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Analog Pressure Gauge meter
4604/27/23
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ALAT UKUR TEMPERATUR
4704/27/23
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Thermocouple
4804/27/23
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Jenis-jenis Valve
4904/27/23
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STOP VALVE
5004/27/23
PISTON VALVECHECK VALVEBALL VALVE
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Strainer dan Filter
5104/27/23
Vacumm Breaker
Air ventsFor liquid system
For hot and cold waterFor steam