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EP-3412555-B1 - SHIP INCLUDING GAS RE-VAPORIZING SYSTEM

EP3412555B1EP 3412555 B1EP3412555 B1EP 3412555B1EP-3412555-B1

Inventors

  • LEE, TAE YEONG
  • HA, JONG PIL
  • KANG, MIN HO
  • HEO, HEE SEUNG
  • YANG, SEUNG WOOK

Dates

Publication Date
20260506
Application Date
20170330

Claims (13)

  1. A ship including a gas re-vaporizing system (1), the ship comprising: a ship body (100); a vaporizer (40) which is arranged in an upper portion of an upper deck(104) of a stem (101) of the ship body (100), and vaporizes liquefied gas and supplies the vaporized liquefied gas to a first demander; a heat source supply apparatus which is arranged inside of the stem (101) of the ship body (100) and supplies a heat source which is a non-explosive refrigerant to the vaporizer (40); a seawater pump (51) which is disposed at the stem (101) side inside the ship body (100) and supplies seawater to a seawater heat exchanger (41) included in the heat source supply apparatus so as to exchange heat between the heat source and the seawater; the ship is characterized by a steam heat exchanger (62), which exchanges heat between the heat source and the steam; and a steam line (L5) which connects a second demander (61) arranged inside a stern (103) and the steam heat exchanger (62).
  2. The ship of claim 1, further comprising: at least one deck which vertically divides an internal space of the ship body(100).
  3. The ship of claim 2, wherein the heat source supply apparatus includes: a heat source pump (42), which supplies the heat source; and a heat source circulation line (L3), which is provided with the heat source pump and the seawater heat exchanger (41), and the heat source pump (42) and the seawater heat exchanger (41) are sectioned and disposed at an upper side or a lower side by the deck.
  4. The ship of claim 3, further comprising: a seawater line (L4), in which the seawater flows and which is provided with the seawater pump (51) and the seawater heat exchanger (41), wherein the heat source circulation line (L3) is formed to have a smaller diameter than a diameter of the seawater line (L4).
  5. The ship of claim 4, wherein the seawater line (L4) has one end, which is connected to a seawater inlet (H1) formed on a lateral surface of the ship body (100), and the other end, which is connected to a seawater outlet (H2) formed on a lateral surface of the ship body, and the heat source supply apparatus is disposed in a section inside the ship body (100), in which the seawater outlet (H2) is provided.
  6. The ship of claim 3, wherein the heat source pump (42), the seawater heat exchanger (41), or the steam heat exchanger (62) is sectioned and disposed at an upper side or a lower side by the deck.
  7. The ship of claim 6, further comprising: a boiler, which generates the steam and is disposed in an engine room inside the ship body (100), wherein the steam line (L5) connects the steam heat exchanger (62) and the boiler so that the steam circulates the steam heat exchanger (62) and the boiler, and wherein the steam line (L5) is arranged inside a hull formed in at least a part of a ship bottom (105) of the ship body (100).
  8. The ship of claim 7, wherein the steam is heat-exchanged with the heat source next to the seawater.
  9. The ship of claim 6, wherein the heat source supply apparatus is manufactured in a module type so as to include the heat source pump (42), the seawater heat exchanger (41), or the steam heat exchanger (62).
  10. The ship of claim 1, wherein the heat source supply apparatus is disposed at the stem (101) side inside the ship body (100).
  11. The ship of claim 1, wherein the heat source supply apparatus is disposed at an internal side of the ship body (100).
  12. The ship of claim 11, wherein the heat source supply apparatus is disposed on a lateral surface of an engine room, which is disposed inside the stern (103) of the ship body (100).
  13. The ship of claim 3, wherein the heat source supply apparatus includes a pressure maintaining device (94), which maintains a pressure of a heat source flowing within the heat source circulation line (L3), and the pressure maintaining device (94) maintains the pressure of the heat source by using inert gas.

Description

[Technical Field] The present invention relates to a ship including a gas re-vaporizing system. [Background Art] In general, it is known that Liquefied Natural Gas (LNG) is clean fuel and reserves of LNG are larger than oil reserves, and the amount of LNG used is sharply increased according to the development of oil drilling and transport technologies. It is general that LNG is stored in a liquid state by decreasing a temperature of methane that is a main component to a temperature of - 162°C or lower at 1 atmosphere, and a volume of liquefied methane is about 1/600 of a volume of methane in a gas state that is a standard state, and specific gravity of liquefied methane is about 0.42, which is 1/2 of specific gravity of crude oil. LNG is liquefied and transported, and then is vaporized and used at a used place by easiness of the transportation. However, due to natural disasters and a terror risk, there is a concern that LNG vaporizing equipment is installed on land. Accordingly, instead of a liquefied natural gas re-vaporizing system installed on land in the related art, equipment, in which a re-vaporizing apparatus is installed in an LNG carrying vessel carrying LNG and vaporized natural gas is supplied to land, is in the limelight. In an LNG re-vaporizing apparatus system, LNG stored in a liquefied gas storage tank is pressurized by a boosting pump and is sent to an LNG vaporizer, and the LNG is vaporized to NG in the LNG vaporizer and is sent to a demander on land. Here, large energy is required in a process of heat exchange, in which a temperature of LNG is increased in the LNG vaporizer. Accordingly, in order to solve the problem in that energy used in the process is inefficiently exchanged and is wasted, research on various heat exchange technologies for efficient re-vaporization has been conducted. Document KR 2013 0011152 A refers to a seawater heating device comprising an engine room cooling system, a buffer tank, and a supply valve. The engine room cooling system discharges temperature-elevated first seawater with using the waste heat generated when cooling an engine room. The buffer tank loads the discharged first seawater. In order to supply third seawater, of which temperature is increased by mixing the first seawater with second seawater supplied to an LNG regasification system, to the LNG regasification system, the supply valve is installed on a discharge line between the buffer tank and a seawater supply line to control the quantity of the first seawater. [Disclosure] [Technical Problem] The present invention is conceived to improve the related art, and an object of the present invention is to provide a ship including a gas re-vaporizing system, which is capable of maximizing efficiency of re-vaporization of liquefied gas. [Technical Solution] The present invention is defined in the independent claims. Preferred embodiments are defined in the dependent claims. A ship including a gas re-vaporizing system according to the present invention is defined in claim 1. Particularly, the ship may further include at least one deck which vertically divides an internal space of the ship body. According to the invention, the heat source supply apparatus includes: a heat source pump, which supplies the heat source; a seawater heat exchanger, which heat exchanges the heat source and seawater; and a heat source circulation line, which is provided with the heat source pump and the seawater heat exchanger, and the heat source pump and the seawater heat exchanger may be sectioned and disposed at an upper side or a lower side by the deck. According to the invention, the ship further includes: a seawater pump, which supplies the seawater to the seawater heat exchanger; and a seawater line, in which the seawater flows and which is provided with the seawater pump and the seawater heat exchanger, in which the heat source circulation line may be formed to have a smaller diameter than a diameter of the seawater line. Particularly, the seawater line may have one end, which is connected to a seawater inlet formed on a lateral surface of the ship body, and the other end, which is connected to a seawater outlet formed on a lateral surface of the ship body, and the heat source supply apparatus may be disposed in a section inside the ship body, in which the seawater outlet is provided. According to the invention, the seawater pump may be disposed at a stem side inside the ship body. According to the invention, the ship further includes a steam heat exchanger, which heat exchanges the heat source and steam, in which the heat source pump, the seawater heat exchanger, or the steam heat exchanger may be sectioned and disposed at an upper side or a lower side by the deck. Particularly, the ship may further include: a boiler, which generates the steam and is disposed in an engine room inside the ship body; and a steam line, which connects the steam heat exchanger and the boiler so that the steam circulates the steam heat exchange