MAN B&W
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MAN Diesel
12.09
MAN B&W ME-GI engines 198 89 46-8.1
Heating of LNG
High-pressure LNG heater
Suitable for the fuel gas supply pressure, a shell
and tube type heat exchanger is typically used. As
an example, the key specification is:
• Tube side
Medium: .................................................... LNG/NG
Temperature, inlet: ............................approx. 55 °C
Material: ....................................................AISI 316L
• Shell side
Medium: ..................................... Water/glycol (WG)
Temperature, outlet: ................................ 45 °C ±10
Material: .............................................. Carbon steel
For more information on LNG heating solutions,
contact MAN Diesel & Turbo, Copenhagen.
Fig. 12.09.01: Example of high-pressure LNG heater installation
560 79 03-2.0.0
The LNG for fuel gas supply must be heated to
45 °C ±10 as specified in MAN Diesel & Turbo’s
‘Guiding fuel gas specification’, see Section 7.00.
Subject to the availability on the actual engine
plant, a number of waste heat sources could be
utilised for heating of the LNG including:
• jacket cooling water
• scavenge air cooling water
• steam.
Capacity of the high-pressure LNG heater
The required capacity of the LNG heater is listed
in the CEAS report for the actual project, see Sec-
tion 20.02.
Gas inlet
Expansion
tank
÷15 0 °C
HP vaporiser
+45 °C
T = 55 °C
+85 °C
Inlet
Outlet
Jacket water
Glycol water
system heater
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