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 a liquefied gas from a liquefied gas storage tank of a target, comprising:
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,
wherein, the bunkering vessel supplies the dry gas to the liquefied gas storage tank through the manifold,
wherein, before loading a liquefied gas to the liquefied gas storage tank, the bunkering vessel supplies the dry gas to the liquefied gas storage tank through the manifold to remove moisture inside the liquefied gas storage tank,
wherein the liquefied gas transfer line includes:
a liquid phase transfer line transferring a liquefied gas of a liquid phase; and
a gas phase transfer line transferring a liquefied gas of a gas phase, and
wherein the bunkering vessel further comprises a gas supply line delivering the dry gas received from the dry gas supply portion to at least one of the liquid phase transfer line and the gas phase transfer line, and
wherein the gas supply line supplies the dry gas through the liquid phase transfer line when an external temperature of the bunkering vessel is higher than or equal to a predetermined temperature, and supplies the dry gas through the gas phase transfer line when an external temperature of the bunkering vessel is lower than the predetermined temperature.
2 . A bunkering vessel for loading a liquefied gas to or unloading a liquefied gas from a liquefied gas storage tank of a target, comprising:
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,
wherein, the bunkering vessel supplies the dry gas to the liquefied gas storage tank through the manifold,
wherein, before loading a liquefied gas to the liquefied gas storage tank, the bunkering vessel supplies the dry gas to the liquefied gas storage tank through the manifold to remove moisture inside the liquefied gas storage tank,
wherein the liquefied gas transfer line includes:
a liquid phase transfer line transferring a liquefied gas of a liquid phase; and
a gas phase transfer line transferring a liquefied gas of a gas phase,
wherein the bunkering vessel further comprises a gas supply line delivering the dry gas received from the dry gas supply portion to at least one of the liquid phase transfer line and the gas phase transfer line, and
wherein the gas supply line supplies a dry gas through the liquid phase transfer line when an internal temperature of the liquefied gas storage tank is higher than or equal to a predetermined temperature, and supplies the dry gas through the gas phase transfer line when an internal temperature of the liquefied gas storage tank is lower than a predetermined temperature.
3 . A bunkering vessel for loading a liquefied gas to or unloading a liquefied gas from a liquefied gas storage tank of a target, comprising:
a bunkering tank storing a 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 liquefied gas transfer line connecting the bunkering tank and the manifold to flow the liquefied gas; and
a dry gas supply portion producing a dry gas,
wherein, the bunkering vessel supplies the dry gas to the liquefied gas storage tank through the manifold,
wherein after unloading a liquefied gas from the liquefied gas storage tank, the dry gas supply portion supplies the dry gas to the liquefied gas storage tank through the manifold to discharge an inert gas from the liquefied gas storage tank,
wherein the liquefied gas transfer line includes:
a liquid phase transfer line transferring a liquefied gas of a liquid phase; and
a gas phase transfer line transferring a liquefied gas of a gas phase,
wherein the bunkering vessel further comprising a gas supply line delivering the dry gas received from the dry gas supply portion to at least one of the liquid phase transfer line and the gas phase transfer line, and
wherein the bunkering vessel supplies the dry gas through the liquid phase transfer line when the inert gas is nitrogen gas, and supplies the dry gas through the gas phase transfer line when the inert gas is a gas generated by combusting heavy oil.