Heating Coil Sizing For Fuel Oil Tank [PDF]

Zitiervorschau

OOTCL

ZISHAN ENGINEERS (PVT) LTD.

Determination of Steam Requirement & Heating Coil Sizing For Insulated Fuel Oil Tank

Prepared By:

HZ

Checked By:

QAS

Date: CONSULTANT: EQUIPMENT: CLIENT: REVISION:

12/1/2012

ZISHAN ENGINEERS (PVT) LIMITED Fuel Oil Tank OOTCL 0

TANK DETAILS Tank Height Tank Diameter Area of Tank Walls Area of Tank Top Tank Volume Density of Fluid in Tank Mass of Fluid in tank OPERATING PARAMETERS Specific Heat of Fluid in Tank Initial Fluid Temperature (Inside Tank) T1 Final Fluid Temperature (Inside Tank) T2 Surrounding Air Temperature Steam Quality Temperature of Steam Temperature of Steam at Saturation Pressure of Steam Latent Heat of Steam Mean Temperature Difference

= = = = = = =

= = = = = = = = =

HEAT TRANSFER RATES Heat Transfer Rate (From Insulated Tank Walls to Air) Heat Transfer Rate (From Insulated Tank Top to Air) Heat Transfer Rates of Coil

= = =

HEAT LOSS & STEAM REQUIREMENT Heat Loss to Atmosphere from Tank Sides Heat Loss to Atmosphere from Tank Top Total Heating Requirement Steam Requirement

= = = =

COIL DETAILS Tube O.D. Outside Surface Area Surface Required for Heating Coil Length Required

= = = =

85.31 65.62 17586 3382 288497.4 58.8 16,110,515

ft ft ft2 ft2 ft3 lb/ft3 lb

26 20

942.7

0.43 Btu/lb/F 104 F 104.001 F 50 F Saturated Steam at 8 barg. 347.62 F 347.61 F 116 psig 872.97 BTU/Lb 243.6 F . 2 0.83036 BTU/hr/ft /F 2 0.505435 BTU/hr/ft /F 2 21 BTU/hr/ft /F

788,558 92,306 881,151 1,009

2.375 0.622 172 277

m m

Input Values Calculated Values

kg/m3 (from Hysys, FO) 95 % Filled of Tank Volume

(from Hysys, FO) 40.0 C 40.0 C 10.0 C 175.3 C 175.3 C

135.3 C

From Spirax Sarco Module "Energy Consumption of Tanks and Vats" From Spirax Sarco Module "Energy Consumption of Tanks and Vats" From Ernest E. Ludwig Vol-3

BTU/hr BTU/hr BTU/hr Lbs/hr

in ft2/ft of pipe length ft2 ft

458 Kg/hr

84 m

Note: 1. Heat transfer rates for atmospheric losses are taken for Wind Velocities of 36 Km/hr.

FILE: 112745981.xlsx.ms_office

SHEET 2 OF 1

ZISHAN ENGINEERS (PVT.) LTD.

OOTCL

Determination of Steam Requirement & Heating Coil Sizing For Un-Insulated Fuel Oil Tanks CONSULTANT: EQUIPMENT: CLIENT: REVISION:

Prepared By:

HZ

Checked By:

QAS

Date:

12/1/2012

ZISHAN ENGINEERS (PVT) LIMITED Fuel Oil Tank OOTCL 0

TANK DETAILS Tank Height Tank Diameter Area of Tank Walls Area of Tank Top Tank Volume Density of Fluid in Tank Mass of Fluid in tank OPERATING PARAMETERS Specific Heat of Fluid in Tank Initial Fluid Temperature (Inside Tank) T1 Final Fluid Temperature (Inside Tank) T2 Surrounding Air Temperature Steam Quality Temperature of Steam (super heated) Temperature of Steam at Saturation Pressure of Steam Latent Heat of Steam Mean Temperature Difference

= = = = = = =

= = = = = = = = =

HEAT TRANSFER RATES Heat Transfer Rate (From Tank Walls to Air) Heat Transfer Rate (From Tank Top to Air) Heat Transfer Rates of Coil

= = =

HEAT LOSS & STEAM REQUIREMENT Heat Loss to Atmosphere from Tank Sides Heat Loss to Atmosphere from Tank Top Total Heating Requirement Steam Requirement

= = = =

COIL DETAILS Tube O.D. Outside Surface Area Surface Required for Heating Coil Length Required

= = = =

85.31 65.62 17586 3382 288497.4 58.8 16,110,515

ft ft ft2 ft2 ft3 lb/ft3 lb

26 20

942.7

0.42 Btu/lb/F 104 F 104.001 F 50 F Saturated Steam at 8 barg. 347.62 F 347.61 F 116 psig 872.97 BTU/Lb 243.6 F

2 8.3036 BTU/hr/ft /F 2 5.05435 BTU/hr/ft /F 2 21 BTU/hr/ft /F

7,885,585 923,059 8,808,926 10,091

2.375 0.622 1722 2768

m m

Input Values Calculated Values

kg/m3 (from Hysys, FO) 95 % Filled of Tank Volume

(from Hysys, FO) 40.0 C 40.0 C 10.0 C 175.3 C 175.3 C

135.3 C

From Spirax Sarco Module "Energy Consumption of Tanks and Vats" From Spirax Sarco Module "Energy Consumption of Tanks and Vats" From Ernest E. Ludwig Vol-3

BTU/hr BTU/hr BTU/hr Lbs/hr

in ft2/ft of pipe length ft2 ft

4,578 Kg/hr

844 m

Note: 1. Heat transfer rates for atmospheric losses are taken for Wind Velocities of 36 Km/hr.

FILE: 112745981.xlsx.ms_office

SHEET 2 OF 2