Mixed refrigerant composition (%, mol)

Refrigerant circulation amount (kmol/h)

Total energy (10e+07 kJ/h)

CH4

C2H6

C3H8

i-C4H10

n-C4H10

N2

1st

70

10

10

3.60

3.40

3.00

78,650

78.6

2nd

60

15

15

4.60

3.40

2.00

25,470

54.4

3rd

50

15

25

4.60

3.40

2.00

17,560

30.7

4th

40

25

25

4.60

3.40

2.00

10,420

27.5

5th

30

38

22

4.60

3.40

2.00

7850

24.2

6th

33

35

22

4.60

3.40

2.00

6290

17.3