49

Leak air (approx. 5% of inlet air )

m

la

= m

ha

· 0.05

m

la

=

**1995.239532**

lb/h

50

51

B

C

D

E

F

G

H

I

J

52

Heat from ambient air

Q

a

= m

ha

· h

3

a

Q

a

=

**344885.1341**

Btu/h

53

54

Heat from fuel

Q

f

= m

f

· T

f

· cp

f

Q

f

=

**39461.72314**

Btu/h

55

56

Heat from combustion

Q

comb

. = m

f

· NCVF

Q

comb.

=

**9505883.79**

Btu/h

57

58

Total amount of heat in furnance

Q

Fin

= Q

a

+ Q

f

+ Q

comb.

Q

Fin

=

**9890230.647**

Btu/h

59

60

**FUEL BURNING**

61

The fuel used is mixture of light and medium light fuel oil composition 87%C i 11%H

62

The amount of oxigen and air can be calculated as follows:

63

64

m(O

2

) = 0.01 · (2.667·C+8·H) = 0.01·(2.667·87+8·11)

mO

2

=

**6.614**

lb

65

m

AIR

= 0.115·C + 0.345·H = 0.115·87+0.345·11

m

AIR

=

**28.66**

lb

66

1,3* coefficient of air surplus*

67

m

AIR

= 1,3 · 13,79 = 17,927 kg

air

/ kg

fuel

68

m(N

2

) = 0.786 · mAIR = 0.786 · 17.927 = 13.76 kg N

2

/ kg fuel

69

Air for combustion of 1lb fuel

**17.927**

lb

70

71

Total amount air for combustion

m(air

comb.

) = m

f

· m

AIR

m(air

comb.)

=

**9620.831614**

lb

72

73

**TOTAL AMOUNT HEAT FROM FURNANCE**

74

Heat from hot air

Q

ha

= [m

ha

- m(air

comb

)] · h

1

a

Q

ha

=

**6039796.449**

Btu/h

75

76

Heat from water in combustion

Q(H

2

0) = m

f

· m(H

2

O) · h

1

(H

2

O)

Q(H

2

O) =

**806691**

Btu/h

77

*burning of 1 kg of fuel 1,035 kg water is produced*

78

79

Heat from nitrogen

Q(N

2

) = m

f

· m(N

2

)

· cp(N

2

)

· T

in

Q(N

2

) =

**1278172**

Btu/h

80

*burning of 1 kg fuel 10,65 kg nitrogen is produced*

81

82

Heat from CO

2

Q(CO

2

) = m

f

· m(CO

2

)

· cp(CO

2

)

+ Tin

Q(CO

2

) =

**398424**

Btu/h

83

*burning of 1 kg fuel 3,11 kg CO2 is produced*

84

85

**Total heat from furance **

QF

out

= Q

ha

+Q(H

2

O)+Q(N

2

)+Q(CO

2

)

Q

Fout

=

**8523083.417**

Btu/h

86

87

Furnace losses

Q

FL

= Q

Fin

- QF

out

Q

FL

=

**1367147.23**

Btu/h

88

89

**HEAT ENTERNIG IN TOWER (Qt) [kJ/h]**

90

Heat from furance

Q

F

=

**8523083**

Btu/h

91

Heat from slurrry

Q

sl

= m

wm

· cp

S

· T

S

Q

sl

=

**978895**

Btu/h

92

Heat from leak air

Q

LA

= Qa · h

3

a

Q

LA

=

**17244**

Btu/h

93

**Total amount heat in tower **

Qt

in

= QF

out

+ Q

sl

+ Q

la

Qt

in

=

**9519223**

Btu/h

94

95

**HEAT LEAVING TOWER (Qout) [kJ/h]**

96

Heat from exhaust air

Qa

out

= (m

ha

+m

la

) · h

2

a

Qa

out

=

**1986815.631**

Btu/h

97

Heat from evaporated water

Qew

out

= [m

ev

+(m(H

2

0) · m

f

)] · h

2

w

Qew

out

=

**7179178.119**

Btu/h

98

Heat from N

2

Q(N

2

)

out

= mf · m(N

2

)

· cp(N

2

)

· T

out

Q(N

2

)

out

=

**349144.3442**

Btu/h

99

Heat from CO

2

Q(CO

2

)

out

= m

f

· m(CO

2

)

·cp(CO

2

)

·T

out

Q(CO

2

)

out

=

**108833.2816**

Btu/h

100

Heat from dried material

Q

dm

= m

dm

· cp

dm

· T

dm

Q

dm

=

**294461.5557**

Btu/h

101

102

**Total amount heat from tower **

103

Q

out

= Qa

out

+ Qew

out

+ Q(N

2

)

out

+ Q(CO

2

)

out

+ Q

dm

Q

out

=

**9918432.932**

Btu/h

104