US 10,889,361 B2
Ship comprising engine
Joon Chae Lee, Seoul (KR); and Won Jae Choi, Seoul (KR)
Assigned to Daewoo Shipbuilding & Marine Engineering Co., Ltd., Geoje-si (KR)
Appl. No. 15/742,839
Filed by DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD., Seoul (KR)
PCT Filed Jun. 29, 2016, PCT No. PCT/KR2016/006971
§ 371(c)(1), (2) Date Jan. 8, 2018,
PCT Pub. No. WO2017/007167, PCT Pub. Date Jan. 12, 2017.
Claims priority of application No. 10-2015-0097308 (KR), filed on Jul. 8, 2015; and application No. 10-2015-0175090 (KR), filed on Dec. 9, 2015.
Prior Publication US 2018/0194447 A1, Jul. 12, 2018
Int. Cl. F01K 25/08 (2006.01); F25J 1/00 (2006.01); B63B 25/16 (2006.01); B63H 21/38 (2006.01); F17C 6/00 (2006.01); F25J 1/02 (2006.01); F02M 21/02 (2006.01)
CPC B63H 21/38 (2013.01) [B63B 25/16 (2013.01); F02M 21/0221 (2013.01); F17C 6/00 (2013.01); F25J 1/004 (2013.01); F25J 1/0025 (2013.01); F25J 1/0045 (2013.01); F25J 1/0202 (2013.01); F25J 1/023 (2013.01); F25J 1/0277 (2013.01); F17C 2223/0153 (2013.01); F17C 2227/0157 (2013.01); F17C 2265/038 (2013.01); F25J 2220/62 (2013.01); F25J 2230/30 (2013.01); Y02T 10/30 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A ship comprising:
a storage tank configured to store liquefied gas;
a boil-off gas line configured to flow boil-off gas discharged from the storage tank;
a compressor configured to receive boil-off gas from the boil-off gas line and to compress the boil-off gas to provide compressed boil-off gas having a pressure in a first range between 150 and 400 bar;
a first line configured to flow a first flow of compressed boil-off gas comprising a portion of the compressed boil-off gas from the compressor;
a high-pressure engine configured to receive the first flow of compressed boil-off gas from the first line and to consume the first flow of compressed boil-off gas at a pressure in the first range;
a second line configured to flow a second flow of compressed boil-off gas comprising a portion of the compressed boil-off gas from the compressor;
a heat exchanger configured to cool the second flow of compressed boil-off gas flowing the second line to provide a cooled second flow to a cooled second line;
a re-liquefaction decompressor located downstream the heat exchanger to receive a first portion of the cooled second flow from the cooled second line;
a cooling decompressor located downstream the heat exchanger to receive a second portion of the cooled second flow from the cooled second line;
wherein re-liquefaction decompressor receiving the first portion of the cooled second flow is configured to liquefy the received first portion of the cooled second flow from the cooled second line to provide a liquefied flow for sending to the storage tank,
wherein the cooling decompressor receiving the second portion of the cooled second flow is configured to decompress the received second portion of the cooled second flow from the cooled second line to generate a cooled flow of decompressed boil-off gas and further configured to return the cooled flow of decompressed boil-off gas to the heat exchanger for cooling the second flow of compressed boil-off gas, and
a low-pressure engine or generator configured to receive the cooled flow of decompressed boil-off gas that has cooled the second flow of compressed boil-off gas in the heat exchanger and to consume the cooled flow of decompressed boil-off gas at a pressure in a second range higher than 0 bar and lower than 20 bar.