LNG Vaporizer

모델

시리즈

해양

제품 소개

LNG Vaporizer
B.O.G(Boil-off gas) is generated while LNG is being transported, and this gas is utilized as fuel in steam turbine for sailing of LNG Carrier. Therefore, water-feeding shall be maintained very strictly on LNG Carrier. Meanwhile, the general-purpose-steam is supplied from the main boiler, and utilized to operate various auxiliary components of the ship. However, if those auxiliary component are defaulted or being operated incorrectly, feed-water could be mixed with boiler water, and eventually the life-time of boiler could be shorten. In this reason, the steam for mail boiler and general-purpose-steam are separated.

LNG RV/FSRU Regasfication System

sea water direct heating
combined open/closed loop with seawater and steam heating

- Min. equipment
- Control simple
- Min. Energy consumption
- High pressure vaporizer : Shell and Tube type heat exchanger

General Design Data

ITEM	200 MMSCFD	150 MMSCFD
Surface (m²)	Gross 943.66	Gross 806.01
Heat exchanged (kW)	36,656	28,031
Design pressure (barg)	Shell 7.0 / Tube 135.0	Shell 7.0 / Tube 135.0
Design code	ASME, Class	ASME, Class
Tubes	OD : 19.05mmLength : 13.50m	OD : 19.05mmLength : 13.00m
Shell ID	1450mm	1350 mm

Design Concepts
A. Steady Uniform Flow
Distributor installation on the channel

B. Anti-corrosion(Material of Tube : SMO 254)
To prevent corrosion due to seawater

C. Anti-Freezing
– Seawater inlet located in the low-temperature region
– To minimize shell side dead zone

D. Structural Stablility evaluation / Quality Assessment

LNG Heater / Vaporizer

DongHwa Entec heat exchangers for LNG applications are of the shell and tube design and delivered for any BOG or LNG vapor duty according to customer specifications.Materials are typically 304L or 316L. Instrumentation and control valves will be part of the supply scope.

LNG Heater / Vaporizer – Test Model

Verification Tests for Development The DongHwa Steam Heating LNG Vaporizer is a highly reliable vaporizer development through extensive verification tests as shown left.

LNGC – N2 Compander Package Unit

N2 Compander is a re-liquefaction equipment which will be installed inside the 216K LNG vessel for the first time, now being built by three big domestic shipyards. It uses the nitrogen of extremely lowered temperature to change the natural boil-off gas, which originates from the cargo tanks of low temperature, to LNG and gets it back to the cargo tank.

LPG Cargo Heater / Vaporizer

DongHwa cargo heaters and vaporizers are delivered as separate units or combined for both duties in the same shell.Typically cargo heaters are designed for sea water cooling with sea water on the shell side and tubes of corrosion resistant high Ni-alloy stainless steel 904L. Heat exchangers in all Titanium are also available.