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Cahyo Wibowo / JOJAPS – JOURNAL ONLINE JARINGAN PENGAJIAN SENI BINA
JTE Calculation at 250 bar pressure [7]

[ ̂ − ( ̂ ) ]
) ]
[ − (
= ( ) = − = − =
̂
̂
̂ = ( )

Heat Capacity Calculation ̂ :

̂ ̂ (39.47℃) − ̂(−45℃)
̂ = ( ) =

(39.47 − (−19))℃

(−140.2893 − (−175.5794) 35.2901
= = = 0.6035
58.47 58.47 .

3
̂ ̂ (39.47℃) − ̂ (−45℃) (0.00611 − 0.07366) −0.0675 3
( ) ≈ = = = −7.975 × 10 −4
(39.47 − (−45))℃ 84.47 84.7 .

̂
[ ̂ − ( ) ]

= ( ) = −
̂

3
.
= −0.090108614

-3
3
Since 1 kJ = 10 MPa.m , and 1 MPa = 10 bar [9]

o
Then the Joule Coefficient of Thompshon Effect Natural Gas at a pressure of 250 bar and 39.47 C is :
K K
μ = −0.090108614 = −0.9x10 −2
MPa bar
K o
On value −0.009010861 or -273.159 C/Bar, Icing happened.
bar

With the same calculation technique, the JTE values obtained on the 2nd to 6th measurements are shown in Table 3

Table 3. Table of measurement data that has been processed for JTE analysis.
Z2=
Quanti
Time X1-P1 X2- Y1-Qm Z1-JTE fikasi
[min] (BAR) T2oC T1oC P2 (BAR) P3 (BAR) T2oC (Nm3/h) Qm Std TwoC K/Mpa JTE
X1 X2 Y1 Z1
1 250 -45 11 15 1 26 111 100 28 -0.09011 3
2 230 -39 32 15 0.9 28 105 100 28 0.171428 4
3 200 -20 33 15 0.9 33 107 100 55 0.222937 5
4 162 -12 33 14 0.7 34 101 100 48 0.066683 4
5 77 6 32 10 0.5 37 107 100 46 0.050233 2
6 53 19 35 8 0.4 35 102 100 46 0.054792 1

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