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JPS6228357B2 - - Google Patents
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JPS6228357B2 - - Google Patents

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Publication number
JPS6228357B2
JPS6228357B2 JP5078581A JP5078581A JPS6228357B2 JP S6228357 B2 JPS6228357 B2 JP S6228357B2 JP 5078581 A JP5078581 A JP 5078581A JP 5078581 A JP5078581 A JP 5078581A JP S6228357 B2 JPS6228357 B2 JP S6228357B2
Authority
JP
Japan
Prior art keywords
gas
heat
boil
heat exchanger
compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP5078581A
Other languages
Japanese (ja)
Other versions
JPS57167597A (en
Inventor
Yutaka Katsura
Tsunanori Nishimoto
Reiichiro Abiko
Takeshi Sakamoto
Hisashi Kawashima
Shinzo Tsubaki
Koichi Mitani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kanadevia Corp
Original Assignee
Hitachi Shipbuilding and Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Shipbuilding and Engineering Co Ltd filed Critical Hitachi Shipbuilding and Engineering Co Ltd
Priority to JP5078581A priority Critical patent/JPS57167597A/en
Publication of JPS57167597A publication Critical patent/JPS57167597A/en
Publication of JPS6228357B2 publication Critical patent/JPS6228357B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F17C9/04—Recovery of thermal energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Description

【発明の詳細な説明】 本発明はLNG運搬船における気化ガスの処理
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vaporized gas processing device in an LNG carrier.

LNGは沸点が約−162℃の超低温液体であるた
め、外気からの侵入熱によるボイルオフガスの発
生はさけられない。今日まで就航しているLNG
運搬船は、第１図に示すように、LNGタンク１
で発生したボイルオフガス２はコンプレツサー３
で圧縮供給され、そしてヒーター４において蒸気
または海水５によつて加熱されたのち、ボイラー
６で重油７と混焼される。これによつて生じたス
チーム８がタービン９に送られ、推進機の動力源
として利用している。ところでヒーター４におけ
る熱交換によつて凝縮した蒸気ドレンは再びボイ
ラーに供給され、一方海水の場合はそのまま投棄
されるのであり、したがつて冷熱は何ら利用され
ていないのが現状である。 Since LNG is an ultra-low temperature liquid with a boiling point of approximately -162°C, the generation of boil-off gas due to heat entering from the outside air is unavoidable. LNG in service to date
The carrier ship has LNG tank 1 as shown in Figure 1.
The boil-off gas 2 generated in the compressor 3
After being compressed and supplied by steam or seawater 5 in a heater 4, it is co-fired with heavy oil 7 in a boiler 6. Steam 8 generated thereby is sent to a turbine 9 and is used as a power source for the propulsion machine. By the way, steam condensate condensed by heat exchange in the heater 4 is supplied to the boiler again, while seawater is simply dumped, so the current situation is that the cold energy is not utilized at all.

本発明は冷熱を有効に利用し得るLNG運搬船
における気化ガスの処理装置を提供することを目
的とし、LNGタンクから発生するボイルオフガ
スを第１のコンプレツサーを介して再液化装置に
導き該再液化装置で再液化されたガスを前記
LNGタンクに帰還させる第１の管系と、前記コ
ンプレツサーで圧縮されたボイルオフガスを第１
〜第３の熱交換器を通してボイラーに導く第２の
管系とを備え、前記第１の熱交換器によつて冷却
された熱媒体を加熱・気化させる第４の熱交換器
と、この第４の熱交換器によつて気化された熱媒
体によつて発電機を駆動する膨張タービンと、前
記第２の熱交換器によつて冷却された冷媒と熱交
換を行う冷蔵庫と、この冷蔵庫で熱交換を終えた
冷媒を圧縮して再び前記第２の熱交換器に導く第
２のコンプレツサーと、メインエンジンの冷却水
を前記第３の熱交換器および前記第４の熱交換器
を通して循環させる経路とを設けた構成とした。 An object of the present invention is to provide a processing device for vaporized gas in an LNG carrier that can effectively utilize cold energy, and the boil-off gas generated from an LNG tank is guided to a reliquefaction device via a first compressor. The reliquefied gas is
A first pipe system returns the LNG tank, and a first pipe system returns the boil-off gas compressed by the compressor.
~ a second pipe system that leads to the boiler through a third heat exchanger; a fourth heat exchanger that heats and vaporizes the heat medium cooled by the first heat exchanger; an expansion turbine that drives a generator with the heat medium vaporized by the second heat exchanger; and a refrigerator that exchanges heat with the refrigerant cooled by the second heat exchanger; A second compressor that compresses the refrigerant that has undergone heat exchange and guides it again to the second heat exchanger, and circulates cooling water for the main engine through the third heat exchanger and the fourth heat exchanger. The configuration includes a route.

これにより、ボイルオフガスを利用して膨張タ
ービンならびに発電機を駆動することができると
ともに、冷蔵庫の冷媒冷却およびメインエンジン
の冷却水冷却を行うことができる。また、ボイル
オフガスの利用順位を考慮したことにより、メイ
ンエンジンの冷却水を二段冷却して循環させるこ
とができ、高い冷却効率を得ることができる。 Thereby, the expansion turbine and the generator can be driven using the boil-off gas, and the refrigerant of the refrigerator and the cooling water of the main engine can be cooled. Furthermore, by considering the usage order of boil-off gas, the main engine cooling water can be cooled and circulated in two stages, and high cooling efficiency can be obtained.

以下本発明の一実施例を第２図に基づいて説明
する。 An embodiment of the present invention will be described below with reference to FIG.

LNGタンク１０で発生したボイルオフガス１
１はコンプレツサー１２を介して冷却器１３に入
り、熱媒体１４を凝縮させる冷熱源として利用さ
れる。熱媒体１４は沸点が−50℃〜60℃程度のも
ので、例えばプロパンや炭化水素混合体（メタ
ン、エタン、プロパン、ブタンなど）が該当す
る。熱交換器１３で凝縮した熱媒体１４はポンプ
１５で昇圧された後、ヒーター１６においてメイ
ンエンジン１７からの冷却水１８で気化される。
気化された熱媒体１４は膨張タービン１９に入
り、エネルギーが回収されて発電機２０を駆動す
る。この膨張タービン１９を出た熱媒体１４の低
圧ガスは冷却器１に入つて凝縮され、再び同じサ
イクルを繰返し、以つてボイルオフガス１１の冷
熱を利用した発電が行なわれる。次にボイルオフ
ガス１１は冷媒凝縮器２１を通る。凝縮した冷媒
２２は膨張弁２３を介して糧食冷蔵庫２４に利用
される。従来の方式では凝縮器２１の冷却水とし
て海水を用いているが、本方式では海水より低温
のボイルオフガスを用いているので凝縮圧力は低
くなり、コンプレツサー２５の負荷は小さくな
り、結果として電動機２６の消費電力は小さくな
る。またボイルオフガスの温度が充分に低い場
合、コンプレツサー２５はブロワー程度のもので
もよい。さらにボイルオフガス１１は冷却器２７
を通され、ここで、メインエンジン１７からの冷
却水１８を前記ヒーター１６の前段において冷却
させる。常温にまで昇温したボイルオフガス１１
はボイラー２８で燃焼され、タービン２９を駆動
して発電機３０を運転する。両発電機２０，３０
で得られた電力は船内所要電力の一部として利用
できる。３１は第１のコンプレツサー１２を出た
ボイルオフガス１１の一部を再液化する再液化装
置で、ボイルオフガスにより発電した前記電力で
運転される構成とされている。これにより、ボイ
ルオフガス１１の節減および省エネルギー効果が
期待できる。ヒーター１６で充分に冷却された冷
却水１８はフアンユニツト３２を通すことにより
居住区の冷房に利用できる。一方、メインエンジ
ン１７を出た温かい冷却水１８はフアンユニツト
３３を通すことによつて、冬期に居住区の暖房に
利用できる。またメインエンジン１７の排ガス３
４の持つ熱は排ガスエコノマイザ３５で回収さ
れ、タービン２９の駆動エネルギーとして利用さ
れる。 Boil-off gas 1 generated in LNG tank 10
1 enters a cooler 13 via a compressor 12 and is used as a cold heat source to condense a heat medium 14. The heat medium 14 has a boiling point of about -50°C to 60°C, such as propane or a hydrocarbon mixture (methane, ethane, propane, butane, etc.). The heat medium 14 condensed in the heat exchanger 13 is pressurized by the pump 15 and then vaporized by the cooling water 18 from the main engine 17 in the heater 16 .
The vaporized heat transfer medium 14 enters the expansion turbine 19 and energy is recovered to drive the generator 20 . The low-pressure gas of the heat medium 14 that exits the expansion turbine 19 enters the cooler 1 and is condensed, and the same cycle is repeated again, thereby generating electricity using the cold heat of the boil-off gas 11. The boil-off gas 11 then passes through a refrigerant condenser 21 . The condensed refrigerant 22 is used in the food refrigerator 24 via the expansion valve 23. In the conventional method, seawater is used as cooling water for the condenser 21, but in this method, boil-off gas at a lower temperature than seawater is used, so the condensing pressure is lower, the load on the compressor 25 is reduced, and as a result, the electric motor 26 The power consumption of will be reduced. Further, if the temperature of the boil-off gas is sufficiently low, the compressor 25 may be of the order of a blower. Furthermore, the boil-off gas 11 is fed to a cooler 27
Here, cooling water 18 from the main engine 17 is cooled before the heater 16. Boil-off gas 11 heated to room temperature
is burned in the boiler 28 and drives the turbine 29 to operate the generator 30. Both generators 20, 30
The electricity obtained can be used as part of the ship's power requirements. Reference numeral 31 denotes a reliquefaction device that reliquefies a portion of the boil-off gas 11 that has exited the first compressor 12, and is configured to be operated using the electric power generated from the boil-off gas. As a result, reduction in boil-off gas 11 and energy saving effects can be expected. The cooling water 18 sufficiently cooled by the heater 16 can be used for cooling the living area by passing it through the fan unit 32. On the other hand, the warm cooling water 18 discharged from the main engine 17 can be used for heating the living quarters in winter by passing through the fan unit 33. Also, the exhaust gas 3 of the main engine 17
4 is recovered by the exhaust gas economizer 35 and used as driving energy for the turbine 29.

タービン２９は発電機３０の駆動に使わず、例
えば第３図に示すようにメインエンジン１７とギ
ヤー３６で接続し、推進力として利用することも
可能である。 The turbine 29 may not be used to drive the generator 30, but may be connected to the main engine 17 through a gear 36, as shown in FIG. 3, for example, and used as a propulsive force.

以上述べたように本発明によると、ボイルオフ
ガスを利用して膨張タービンならびに発電機を駆
動することができるとともに、冷蔵庫の冷媒冷却
およびメインエンジンの冷却水冷却を行うことが
できる。また、ボイルオフガスの利用順位を考慮
したことにより、メインエンジンの冷却水を二段
冷却して循環させることができ、高い冷却効率を
得ることができる。 As described above, according to the present invention, it is possible to drive an expansion turbine and a generator using boil-off gas, and it is also possible to cool the refrigerant of the refrigerator and the cooling water of the main engine. Furthermore, by considering the usage order of boil-off gas, the main engine cooling water can be cooled and circulated in two stages, and high cooling efficiency can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来例の説明図、第２図は本発明の一
実施例を示す説明図、第３図は別の実施例を示す
要部の説明図である。 １０……LNGタンク、１１……ボイルオフガ
ス、１２……コンプレツサー、１３……冷却器、
１４……熱媒体、１６……ヒーター、１７……メ
インエンジン、１８……冷却水、１９……膨張タ
ービン、２０……発電機、２１……冷媒凝縮器、
２２……冷媒、２４……糧食冷蔵庫、２５……コ
ンプレツサー、２６……電動機、２７……冷却
器、２８……ボイラー、２９……タービン、３０
……発電機、３１……再液化装置。 FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is an explanatory diagram of one embodiment of the present invention, and FIG. 3 is an explanatory diagram of main parts of another embodiment. 10...LNG tank, 11...boil-off gas, 12...compressor, 13...cooler,
14... Heat medium, 16... Heater, 17... Main engine, 18... Cooling water, 19... Expansion turbine, 20... Generator, 21... Refrigerant condenser,
22... Refrigerant, 24... Food refrigerator, 25... Compressor, 26... Electric motor, 27... Cooler, 28... Boiler, 29... Turbine, 30
... Generator, 31 ... Reliquefaction device.

Claims (1)

【特許請求の範囲】[Claims] １ LNGタンクから発生するボイルオフガスを
第１のコンプレツサーを介して再液化装置に導き
該再液化装置で再液化されたガスを前記LNGタ
ンクに帰還させる第１の管系と、前記コンプレツ
サーで圧縮されたボイルオフガスを第１〜第３の
熱交換器を通してボイラーに導く第２の管系とを
備え、前記第１の熱交換器によつて冷却された熱
媒体を加熱・気化させる第４の熱交換器と、この
第４の熱交換器によつて気化された熱媒体によつ
て発電機を駆動する膨張タービンと、前記第２の
熱交換器によつて冷却された冷媒と熱交換を行う
冷蔵庫と、この冷蔵庫で熱交換を終てた冷媒を圧
縮して再び前記第２の熱交換器に導く第２のコン
プレツサーと、メインエンジンの冷却水を前記第
３の熱交換器および前記第４の熱交換器を通して
循環させる経路とを設けたことを特徴とする
LNG運搬船における気化ガスの処理装置。1 A first pipe system for guiding boil-off gas generated from an LNG tank to a reliquefaction device via a first compressor and returning the gas reliquefied in the reliquefaction device to the LNG tank; and a second pipe system for guiding the boil-off gas to the boiler through the first to third heat exchangers, and a fourth heat source for heating and vaporizing the heat medium cooled by the first heat exchanger. an expansion turbine that drives a generator with the heat medium vaporized by the exchanger and the fourth heat exchanger, and exchanges heat with the refrigerant cooled by the second heat exchanger. a refrigerator; a second compressor that compresses the refrigerant that has undergone heat exchange in the refrigerator and guides it again to the second heat exchanger; characterized by providing a circulation path through a heat exchanger.
Vaporized gas processing equipment on LNG carriers.
JP5078581A 1981-04-03 1981-04-03 Treatment of evaporated gas in lng carrying ship Granted JPS57167597A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5078581A JPS57167597A (en) 1981-04-03 1981-04-03 Treatment of evaporated gas in lng carrying ship

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5078581A JPS57167597A (en) 1981-04-03 1981-04-03 Treatment of evaporated gas in lng carrying ship

Publications (2)

Publication Number Publication Date
JPS57167597A JPS57167597A (en) 1982-10-15
JPS6228357B2 true JPS6228357B2 (en) 1987-06-19

Family

ID=12868466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5078581A Granted JPS57167597A (en) 1981-04-03 1981-04-03 Treatment of evaporated gas in lng carrying ship

Country Status (1)

Country Link
JP (1) JPS57167597A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030080163A (en) * 2002-04-06 2003-10-11 김영수 Air conditioner with vaporized LNG for residental area in LNG carrier
FR2877078B1 (en) 2004-10-25 2007-02-02 Snecma Moteurs Sa ENERGY SYSTEM USING STORED NATURAL GAS IN LIQUID FORM AND THERMOELECTRIC MACHINES
WO2008031146A1 (en) * 2006-09-11 2008-03-20 Woodside Energy Limited Boil off gas management during ship-to-ship transfer of lng
KR100955036B1 (en) 2007-09-14 2010-04-28 삼성중공업 주식회사 Ship's cooling system
KR101103769B1 (en) * 2009-10-12 2012-01-06 주식회사 코와 LGN vaporization process system using heat pump
CN102927645A (en) * 2012-11-15 2013-02-13 上海佳豪船舶工程设计股份有限公司 Cold-energy utilization device and method for ships using liquefied natural gas as fuel
JP2016008042A (en) * 2014-06-25 2016-01-18 潮冷熱株式会社 Binary power generation system for lng ship

Also Published As

Publication number Publication date
JPS57167597A (en) 1982-10-15

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