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7/26/2019 Mathcad - m tr.pdf
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Tri Bagus Iman Santoso 2G / 1331210207
2. Data tekanan atmosfer (Patm)
pada beberapa suhu (oC):
Data weight specific (N/m3) pada
beberapa suhu (oC):
P
atm 0 1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
0 51.01410
152.4 49.92810
304.8 49.79110
457.2 49.58410
609.6 49.44610
762 49.23910
914.4 49.10110
31.06710 48.89410
31.21910 48.75610
31.37210 48.54910
31.52410 48.41210
31.67610 48.27410
31.82910 48.13610
31.98110 47.92910
32.13410 47.79110
32.28610 47.65310
32.43810 47.51510
32.59110 47.37710
32.74310 47.23910
32.89610 47.10210
33.04810 46.96410
34.57210 45.72310
0 1
0
1
2
3
4
5
6
7
8
9
10
11
0 39.80610
5 39.80710
10 39.80410
20 39.78910
30 39.76510
40 39.73110
50 39.6910
60 39.64210
70 39.58910
80 39.5310
90 39.46710
100 39.39910
data csort 0( )
suhu 0
weight_specific 1
x( ) linterp suhu weight_specific x( )
data csort Patm 0
suhu Patm0
tekanan_atmosfer Patm1
Patmx( ) linterp suhu tekanan_atmosfer x( )
Tugas Mesin - Mesin Fluida
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Mochamad Deni Wibisono 1331210158 2G/13
Data tekanan uap (N/m2) pada
beberapa suhu (oC):
Pv
0 1
0
1
2
3
4
5
6
7
8
9
10
11
0 610.5
5 872.2
10 31.22810
20 32.33810
30 34.24310
40 37.37610
50 41.23310
60 41.99210
70 43.11610
80 44.73410
90 47.0110
100 41.01310
data csort Pv 0( )
suhu Pv0
tekanan_uap Pv1
Pv x( ) linterp suhu tekanan_uap x( )
20( ) 9.789 103
Pv 20( ) 2.338 103
Patm2.21( ) 1.013 105
t 20
h 2.21m
hl 2.1336m
NPSHR 4m
NPSHA
Patm2.21( )
20( ) 2.21 2.1336
Pv 20( )
20( ) 5.768
Jadi nilai NPSHA = 5.768
Jika pompa memilikiNPSHR 4m=maka pompa dapat digunakan
Tugas Mesin - Mesin Fluida
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7/26/2019 Mathcad - m tr.pdf
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Mochamad Deni Wibisono 1331210158 2G/13
3. Data tekan atmosfer (Pa) pada beberapa
ketinggian (meter):
Data berat jenis (N/m3) pada
beberapa suhu (oC):
Pa
0 1
01
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
0 5
1.01410152.4 49.92810
304.8 49.79110
457.2 49.58410
609.6 49.44610
762 49.23910
914.4 49.10110
31.06710 48.89410
31.21910 48.75610
31.37210 48.54910
31.52410 48.41210
31.67610 48.27410
31.82910 48.13610
31.98110 47.92910
32.13410 47.79110
32.28610 47.65310
32.43810 47.51510
32.59110 47.37710
32.74310 47.23910
32.89610 47.10210
33.04810 46.96410
34.57210 45.72310
0 1
01
2
3
4
5
6
7
8
9
10
11
0
3
9.806105 39.80710
10 39.80410
20 39.78910
30 39.76510
40 39.73110
50 39.6910
60 39.64210
70 39.58910
80 39.5310
90 39.46710
100 39.39910
data csort 0( )
suhu 0
specific_weight 1
x( ) linterp suhu specific_weight x( )
data csort Pa 0( )
altitude Pa0
Tekanan_atmosfer Pa1
Pa x( ) linterp altitude Tekanan_atmosfer x( )
Tugas Mesin - Mesin Fluida
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Mochamad Deni Wibisono 1331210158 2G/13
Tekanan uap fluida cair pada beberapa suhu
(N/m2 abs):
Pv
0 1
0
1
2
3
4
5
6
7
8
9
10
11
0 610.5
5 872.2
10 31.22810
20 32.33810
30 34.24310
40 37.37610
50 41.23310
60 41.99210
70 43.11610
80 44.73410
90 47.0110
100 41.01310
data csort Pv 0( )
Pa 152.4( ) 9.928 104
suhu Pv0
Pv 27( )PvTekanan_uap Pv
1
27( ) 9.772 103
Pv x( ) linterp suhu Tekanan_uap x( )
Q 0.028g 9.81
t 27
D 0.1
KL 2
A
4D
27.854 10
3
V Q
A3.565 hL KL
V2
2 g 1.296 NPSHR 4.57m
Z1max Pa 152.4( ) 27( )
hL Pv 27( ) 27( )
4.57 3.919
Jadi Z1max = 3.919
Tugas Mesin - Mesin Fluida
