Bunkering vessel
A bunkering vessel according to the present invention is for loading a liquefied gas to and unloading a liquefied gas from a liquefied gas storage tank of a target, and it includes a bunkering tank storing a liquefied gas; a manifold provided at a bunkering station of the bunkering vessel to flow in a liquefied gas to and flow out a liquefied gas from the bunkering vessel; a liquefied gas transfer line connecting the bunkering tank and the manifold to flow a liquefied gas; and a dry gas supply portion producing a dry gas, and the dry gas supply portion supplies a dry gas to the liquefied gas storage tank through the manifold before loading a liquefied gas to the liquefied gas storage tank to remove moisture inside the liquefied gas storage tank.
1 . A bunkering vessel for loading a liquefied gas to or unloading the liquefied gas from a liquefied gas storage tank of a target, comprising:
a bunkering tank storing the liquefied gas;
a manifold provided at a bunkering station of the bunkering vessel to flow in the liquefied gas to and flow out the liquefied gas from the bunkering vessel;
a liquid phase transfer line transferring a liquefied gas in a liquid phase by connecting the bunkering tank and the manifold; and
a gas phase transfer line transferring a liquefied gas in a gas phase by connecting the bunkering tank and the manifold,
wherein the bunkering vessel supplies the liquefied gas through the manifold to the liquefied gas storage tank prepared at the target and receives a discharge gas from the target, and
the bunkering vessel further comprising a liquefied gas vaporizer vaporizing the liquefied gas,
wherein before loading the liquefied gas to the target, the liquefied gas vaporized at the liquefied gas vaporizer or a liquefied gas of a relatively small flow rate compared to a flow rate of the liquefied gas upon loading is supplied to the liquefied gas storage tank provided at the target through the manifold, and the discharge gas is received from the target, and
wherein the liquefied gas vaporizer vaporizes a liquefied gas received from the bunkering tank or the liquefied gas storage tank and then supplies to the gas phase transfer line, and the discharge gas is a gas stored in the liquefied gas storage tank and then discharged when the liquefied gas vaporized at the liquefied gas vaporizer is injected into the liquefied gas storage tank.
2 . The bunkering vessel of claim 1 , wherein the bunkering vessel receives the discharge gas through the liquid phase transfer line or the gas phase transfer line.
3 . The bunkering vessel of claim 2 , wherein the liquid phase transfer line or the gas phase transfer line supplies the discharge gas to at least one of a gas combustion unit and a venting portion when a concentration of an inert gas included in the discharge gas is higher than or equal to a predetermined value, and supplies the discharge gas to at least one of the gas combustion unit and a buffer tank when a concentration of the inert gas included in the discharge gas is lower than a predetermined value.
4 . A bunkering vessel for loading a liquefied gas to or unloading the liquefied gas from a liquefied gas storage tank of a target, comprising:
a bunkering tank storing the liquefied gas;
a manifold provided at a bunkering station of the bunkering vessel to flow in the liquefied gas to and flow out the liquefied gas from the bunkering vessel;
a liquid phase transfer line transferring a liquefied gas in a liquid phase by connecting the bunkering tank and the manifold; and
a gas phase transfer line transferring a liquefied gas in a gas phase by connecting the bunkering tank and the manifold,
wherein the bunkering vessel supplies the liquefied gas through the manifold to the liquefied gas storage tank prepared at the target and receives a discharge gas from the target, and
wherein after the liquefied gas is unloaded from the liquefied gas storage tank, the liquefied gas is supplied to the liquefied gas storage tank through the manifold, and the discharge gas is received from the target, and
the bunkering vessel further comprising a liquefied gas vaporizer vaporizing the liquefied gas, and
wherein after the liquefied gas is unloaded from the liquefied gas storage tank, a liquefied gas in a gas phase is supplied to the liquefied gas storage tank.
5 . The bunkering vessel of claim 4 , wherein the discharge gas is a liquefied gas remaining in the liquefied gas storage tank.
6 . The bunkering vessel of claim 4 , wherein immediately after unloading the liquefied gas from the liquefied gas storage tank, the bunkering vessel supplies the liquefied gas to the liquefied gas storage tank through the liquid phase transfer line and receives the discharge gas through the gas phase transfer line.
7 . The bunkering vessel of claim 4 , wherein the liquid phase transfer line or the gas phase transfer line supplies the discharge gas to a buffer tank, wherein the buffer tank supplies the liquefied gas in a liquid phase to the bunkering tank.