Numerical study of axial inclination effect on a

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Numerical study of axial inclination effect on a tubular BOG heat exchanger Yan Mechanical

Numerical study of axial inclination effect on a tubular BOG heat exchanger Yan Mechanical Engineering Southeast University Nanjing, China yanyan. me@seu. edu. cn

Outline v FLNG Facility v Thermal (Floating Liquefied Natural Gas) analysis under axial inclination

Outline v FLNG Facility v Thermal (Floating Liquefied Natural Gas) analysis under axial inclination v Comparison of two inclinations 2

1. FLNG Facility Ø Typical FLNG carries a mass of thermal equipment. Ø Spatial

1. FLNG Facility Ø Typical FLNG carries a mass of thermal equipment. Ø Spatial layout of the equipment has an effect on thermal stability. Ø Max angle of the inclination is set to 30°[1] Ø Two types of equipment location A B [1] International Code on Intact Stability 2008. (IMO Publishing)

1. FLNG Facility 0. 68 kg/s 0. 14 kg/s Ø Max angle of the

1. FLNG Facility 0. 68 kg/s 0. 14 kg/s Ø Max angle of the inclination is set to 30°[1] Ø Two types of equipment location [1] International Code on Intact Stability 2008. (IMO Publishing)

Outline v FLNG Facility v Thermal (Floating Liquefied Natural Gas) analysis under axial inclination

Outline v FLNG Facility v Thermal (Floating Liquefied Natural Gas) analysis under axial inclination v Comparison of two inclinations 5

2. Thermal analysis under axial inclination v Shell-side mass flow rate = 0. 68

2. Thermal analysis under axial inclination v Shell-side mass flow rate = 0. 68 kg/s Ø Growth of low-T pool Inclination angle 30° -30° 22. 5° -22. 5° 15° -15° 7. 5° -7. 5° 0° Temperature distribution of ethylene glycol

2. Thermal analysis under axial inclination v Streamline comparison between two extreme inclinations Ø

2. Thermal analysis under axial inclination v Streamline comparison between two extreme inclinations Ø Moving of stagnant area Inclination of 30° 2 1 Inclination of -30° 2 1 Velocity [m/s] 0 0. 03 0. 06 0. 09 0. 12 0. 15 Shell-side mass flow rate = 0. 68 kg/s

2. Thermal analysis under axial inclination v Shell-side mass flow rate = 0. 14

2. Thermal analysis under axial inclination v Shell-side mass flow rate = 0. 14 kg/s Ø Growth of low T area in negative heel Ø Compress of high-T area in positive heel Inclination angle 30° -30° 22. 5° -22. 5° 15° -15° 7. 5° -7. 5° 0° Temperature distribution of ethylene glycol

2. Thermal analysis under axial inclination v Streamline comparison between two extreme inclinations Ø

2. Thermal analysis under axial inclination v Streamline comparison between two extreme inclinations Ø Moving of stagnant area Inclination of 30° 2 1 Inclination of -30° 1 Velocity [m/s] 3 2 3 0 0. 01 0. 02 0. 03 0. 04 0. 05 Shell-side mass flow rate = 0. 14 kg/s

2. Thermal analysis under axial inclination v Ethylene glycol Inlet temperature of E. G.

2. Thermal analysis under axial inclination v Ethylene glycol Inlet temperature of E. G. = 318. 15 v Boil-off Gas Inlet temperature of BOG = 148. 15

Outline v FLNG Facility v Thermal (Floating Liquefied Natural Gas) analysis under axial inclination

Outline v FLNG Facility v Thermal (Floating Liquefied Natural Gas) analysis under axial inclination v Comparison of two inclinations 11

3. Comparison of two inclinations How to locate the heat exchanger Temperature shift during

3. Comparison of two inclinations How to locate the heat exchanger Temperature shift during the inclination 25 Temperature shift [K] v 21. 692 BOG 20 EG B A 13. 736 15 10 5 0 0. 812000001 2. 988 2 0. 68 kg/s 0. 981999997 0. 552000002 2. 531999998 2. 205999996 1 1 0. 14 kg/s Axial inclination 0. 68 kg/s 0. 14 kg/s Radial inclination Recommended High mass flow rate

Q&A Thank you for your attention ! Yan yanyan. me@seu. edu. cn

Q&A Thank you for your attention ! Yan yanyan. me@seu. edu. cn