ldo system calculation
Post on 27-Dec-2015
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Jindal Steel & Power Limited
LDO Unloading Pump sizing:
A) Capacity selection of LDO unloading Pump for 6x135 MW CPP:
We have considered that the required LDO will be brought to the CPP fuel oil unloadingarea in road tankers. The unloading system will be designed to unload LDO from two (2)nos. road tankers sequentially one after another.
The capacity for each tanker is considered 13
The effective unloading time for each tanker considered 20 minutes
Hence, required capacity of unloading pumps comes out to be = (13 x 60)/20 m3/hr.39 m3/hr.
Margin over required pump capacity considered 10%
So, design capacity of pumps (considering margin) 42.9 m3/hr.
Hence, selected LDO unloading pump capacity 45 m3/hr.
B) Capacity selection of LDO unloading Pumps for 5x180 TPH Process Boiler Plant:
We have considered that the required LDO will be brought to the fuel oil unloadingarea dedicated for Process Boiler Plant in road tankers. The unloading system will be designed to unload LDO from two (2) nos. road tankers sequentially one after another.
The capacity for each tanker is considered 13
The effective unloading time for each tanker considered 20 minutes
Hence, required capacity of unloading pumps comes out to be = (13 x 60)/20 m3/hr.39 m3/hr.
Margin over required pump capacity considered 10%
So, design capacity of pumps (considering margin) 42.9 m3/hr.
Hence, selected LDO unloading pump capacity 45 m3/hr.
6x135 MW CPP + 5x180 TPH Process Boiler Plant at Angul, Orissa
m3
m3
ATTACHMENT-1A
ATTACHMENT-1BLDO UNLOADING PUMP (FOR CPP) TDH CALCULATION
CONSIDERATION1. Kinematic viscosity of LDO =7 Cst2.LDO Storage Tank inlet nozzle elevation = 10.5 M3. Flow through suction header = 45 m3/hr.
SUCTION DISCHARGE
150 100
168.3 114.3
7.11 6.02
154.08 102.26
70 100
45 45
810 810
Viscosity (CS) 7 Viscosity (CS) 7
Reynolds No. 14756.24 Reynolds No. 22233.93
0.023 0.025
0.670 Velocity (m/sec) 1.522
0.239351 2.8864
0.26329 3.1750
1
1.2633 3.1750
PUMP HEAD CALCULATION
10.5
PIPE SIZE (mm NB)
PIPE SIZE (mm NB)
Pipe outer Diameter
Pipe outer Diameter
Pipe Thickness (mm)
Pipe Thickness (mm)
Pipe Inner Diameter (mm)
Pipe Inner Diameter (mm)
Suction Piping Length (m)
Discharge Piping Length (m)
Flow, Q (m3/hr) Flow, Q (m3/hr)
Density (kg/m3) Density (kg/m3)
Darcy Friction Factor
Darcy Friction Factor
Velocity (m/sec)
Pressure Drop (m) in st pipe
Pressure Drop (m) in st pipe
Adding 10% MARGIN ON PRESSURE DROP = (M)
Adding 10% MARGIN ON PRESSURE DROP = (M)
Pr.loss due to strainer(MLC)
TOTAL SUCTION HEAD LOSS (ABSOLUTE) (MLC)
TOTAL DISCHARGE HEAD LOSS (ABSOLUTE) (MLC)
Total staic Head to be developped(by differnce)in MLC
= 14.938 MLC
Bend & Fittings loss considered = 5%
Total Dynamic head (considering Bend & Fittings Loss) = 15.685 MLC
Margin over estimated pumping head required = 5%
SELECTED TOTAL HEAD = 16.47 MLC
20 MLC
TOTAL DYNAMIC HEAD (without bend & Fittings loss)= Total Static head to be developed+Friction loss (suction+ discharge)
of total developed head
NOTE: Minimum wall thickness for steel piping shall be (i) Sch. 80 for pipe sizes up to 50 NB; (ii) Sch. 40 for pipe sizes above 50 NB but below 300 NB; and (iii) Sch. STD for pipe sizes 300 NB and above.
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