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BAB IV
HASIL PENGAMATAN DAN PENGOLAHAN DATA
A.HASIL PENGAMATAN
Sistem Linier :
MATERIAL TIN Q T1 T2 T3 T4 T5 T6 T7 T8 T9 DIAMETER DXKuningan Besar 30 30 92,1 90,1 87,2 65,6 44,4 42,1 37 35,4 31,6 25 mm 10 mm
Kuningan kecil 30 30 95,2 92,1 90,4 65,6 44,4 42,1 35,3 32,6 31,6 13 mm 10 mm
Stainless Steel 30 30 90,6 87,1 85 65,1 44,5 42,4 34,2 32,6 31,1 25 mm 10 mm
Sistem Radial :
MATERIAL TIN Q T1 T2 T3 T4 T5 T6 T7 T8 T9 DXKuningan 30 30 44,9 41,8 38,5 37,1 34,9 33,7 10 mm
Ro = 10 mm = 10-2 m RL = 50 mm = 5.10-2 m L = 30 mm = 3. 10-2 m
B. PENGOLAHAN DATA
4.1. Perhitungan Harga k untuk Setiap Logam
a) Sistem Linear
Kuningan Besar :
D = 25 mm = 25. 10-3 m
A = Konstan
Untuk DT1 = T1-T2= 365,25˚K-362,25˚K=2˚K
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∆T2 = T2-T3 = 362,25˚K-360,35˚K = 1,9˚K
Ti1=349,55˚K
Ti2=312,7 K
km(rata-rata)=k1+k2+k3+k4+k5+k6+k7+k8+k9+k10=194,568˚K
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Kuningan kecil :
Ti1=351,15
Ti2=311,85˚K
km(rata-rata)=k1+k2+k3+k4+k5+k6+k7+k8+k9+k10= 792,330˚K
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Stainless steel :
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Ti1= 348,2˚K
Ti2=311,45˚K
Km(rata-rata)= k1+k2+k3+k4+k5+k6+k7+k8+k9+k10= 197,592˚K
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b)Sistem radial :
k1 = = 82,67
k2 = = 77,660
k3 = = 183,057
k4 = = 116,490
k5 = =213,566
km(rata-rata)= k1+k2+k3+k4+k5=134,688˚K
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4.2. Perhitungan untuk nilai Q pada setiap logam
a)Sistem Linier
Kuningan Besar :
Kuningan Kecil :
Stainless Steel :
b)Sistem Radial
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4.3.Tabel Hubungan k dan Q
Jenis Material T=Ti1-Ti2 Q(W)
1.Sistem Linier
a.Kuningan besar 36,85K 352,038W
b.Kuningan kecil 39,3K 414,142W
c.Stainless Steel 36,75K 356,539W
2.Sistem Radial 1,2K 37,214W
4.4.Persen Kesalahan Harga Q
%Kesalahan= x100%
Sistem Linier
Kuningan Besar
Q Praktek = 30 W
%Kesalahan= x100% = 91,47%
Kuningan Kecil
Q Praktek = 30 W
%Kesalahan= x100% = 92,75%
Stainless Steel
Q Praktek = 30 W
%Kesalahan= x100% = 91,58%
Sistem Radial
Q Praktek = 30 W
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%Kesalahan= x100% = 19,38%