The system heats glycol water using steam generated by a boiler and heating LNG using the glycol water, thereby increasing efficiently the LNG to temperature required for an engine. In addition, the system senses LNG flowing to a glycol tank using a pressure sensor, etc. when the LNG flows to the glycol tank due to pressure difference between a fuel supplying line and a glycol circulation line generated according as a heat exchanger is broken down, and outputs the flowed LNG to the outside. As a result, the glycol circulation line may be returned to original state and stability of the system may be enhanced.

The present invention relates to improvements to fill prevention devices and more particularly to a permanently installed fill prevention device used for potable water tanks. There are other fill prevention devices however because other fill prevention devices related to potable water systems require them to be removed before filling the water tank, these other devices are difficult to use and are often lost. The present invention discloses a circular disk (1) made from plastic such as Nylon, High Density Polypropylene, or other inert durable plastic. The outer area of the disk is threaded (3) to allow this fill prevention device to be threaded into existing potable water deck fill (7) When in place the device will prevent the insertion of a fuel nozzle, hence keeping the water tank and potable water contamination free. From the center of the circular disk is a hollow cylinder (2) which rises vertically and is connected to the inner wall of the circular disk. The diameter of this hollow cylinder is such so that the end of a garden hose (5) can be inserted over it to fill the water tank. Along the bottom edge of the device are holes (4) that allow air and excess water to escape. This device when inserted into an existing deckfill (7) creates both a mechanical barrier along with a visual deterrent due to it's blue color which is consistent with containers used for potable water.

This device when inserted still allows the existing deck cap (6) to be used.

This fill prevention device can also be manufactured into a deckfill (12) as shown in FIG. 7.

The advantage of having this device in place is to prevent the costly error of accidentally adding fuel to a watercrafts potable water system. This is an error that occurs often and results in irreparable damage to the watercrafts potable water tank resulting in thousands of dollars of damage; in most cases causing the need for expensive replacement of the watercrafts water tank system. There is also the creation of a hazardous waste material when mixing fuel within the water system. This will affect the need for proper hazardous waste disposal.

The present invention relates to improvements to fill prevention devices and more particularly to a permanently installed fill prevention device used for potable water tanks. There are other fill prevention devices however because other fill prevention devices related to potable water systems require them to be removed before filling the water tank, these other devices are difficult to use and are often lost. The present invention discloses a circular disk (1) made from plastic such as Nylon, High Density Polypropylene, or other inert durable plastic. The outer area of the disk is threaded (3) to allow this fill prevention device to be threaded into existing potable water deck fill (7) When in place the device will prevent the insertion of a fuel nozzle, hence keeping the water tank and potable water contamination free. From the center of the circular disk is a hollow cylinder (2) which rises vertically and is connected to the inner wall of the circular disk. The diameter of this hollow cylinder is such so that the end of a garden hose (5) can be inserted over it to fill the water tank. Along the bottom edge of the device are holes (4) that allow air and excess water to escape. This device when inserted into an existing deckfill (7) creates both a mechanical barrier along with a visual deterrent due to it's blue color which is consistent with containers used for potable water.

This device when inserted still allows the existing deck cap (6) to be used.

This fill prevention device can also be manufactured into a deckfill (12) as shown in FIG. 7.

The advantage of having this device in place is to prevent the costly error of accidentally adding fuel to a watercrafts potable water system. This is an error that occurs often and results in irreparable damage to the watercrafts potable water tank resulting in thousands of dollars of damage; in most cases causing the need for expensive replacement of the watercrafts water tank system. There is also the creation of a hazardous waste material when mixing fuel within the water system. This will affect the need for proper hazardous waste disposal.

A system for reliquefying a boil off gas generated in a storage tank includes a first compressor compressing a partial amount (hereinafter, referred to as ‘fluid a’) of boil off gas discharged from the storage tank, a second compressor compressing another partial amount (hereinafter, referred to as ‘fluid b’) of boil off gas discharged from the storage tank, a second expanding unit expanding a partial amount (hereinafter, referred to as ‘fluid c’) of a flow formed as the fluid a and the fluid b join, a heat-exchanger cooling another partial amount (hereinafter, referred to as ‘fluid d’) of the flow formed as the fluid a and the fluid b join, and a first expanding unit expanding the fluid d cooled by the heat-exchanger, wherein the heat-exchanger heat-exchanges the fluid d with the fluid c as a coolant expanded by the second expanding unit to cool the fluid d.

A system for reliquefying a boil off gas generated in a storage tank includes a first compressor compressing a partial amount (hereinafter, referred to as ‘fluid a’) of boil off gas discharged from the storage tank, a second compressor compressing another partial amount (hereinafter, referred to as ‘fluid b’) of boil off gas discharged from the storage tank, a second expanding unit expanding a partial amount (hereinafter, referred to as ‘fluid c’) of a flow formed as the fluid a and the fluid b join, a heat-exchanger cooling another partial amount (hereinafter, referred to as ‘fluid d’) of the flow formed as the fluid a and the fluid b join, and a first expanding unit expanding the fluid d cooled by the heat-exchanger, wherein the heat-exchanger heat-exchanges the fluid d with the fluid c as a coolant expanded by the second expanding unit to cool the fluid d.

An improved amphibious vehicle comprising: a drive train; a plurality of ground engaging wheels; a cooling system; a water propulsion system; and a hull which defines a passenger compartment, wherein the form/shape of the hull below the waterline is substantially defined by a plurality of buoyancy modules that are demountably mountable to the amphibious vehicle.

An improved amphibious vehicle comprising: a drive train; a plurality of ground engaging wheels; a cooling system; a water propulsion system; and a hull which defines a passenger compartment, wherein the form/shape of the hull below the waterline is substantially defined by a plurality of buoyancy modules that are demountably mountable to the amphibious vehicle.

A seawater cooling system adapted to mitigate salt crystallization in a seawater cooling loop. The system may include a pump operatively connected to the cooling loop and configured to pump seawater through the cooling loop, a temperature sensor operatively connected to the cooling loop and configured to monitor a temperature of the seawater in the cooling loop, and a controller operatively connected to the temperature sensor and to the pump, the controller configured to issue a warning and to increase a speed of the pump if it is determined that the monitored temperature of the seawater exceeds a predetermined threshold temperature.

Provided is a liquefied gas treatment system for a vessel, which includes a cargo tank storing liquefied natural gas (LNG), and an engine using the LNG as fuel. The liquefied gas treatment system includes: a compressor line configured to compress boil-off gas (BOG) generated in the cargo tank by a compressor and supply the compressed BOG to the engine as fuel; a high pressure pump line configured to compress the LNG stored in the cargo tank by a pump and supply the compressed LNG to the engine as fuel; and a heat exchanger configured to liquefy a part of BOG, which is compressed by the compressor, by exchanging heat with BOG that is discharged from the cargo tank and transferred to the compressor.

Provided is a liquefied gas treatment system for a vessel, which includes a cargo tank storing liquefied natural gas (LNG), and an engine using the LNG as fuel. The liquefied gas treatment system includes: a compressor line configured to compress boil-off gas (BOG) generated in the cargo tank by a compressor and supply the compressed BOG to the engine as fuel; a high pressure pump line configured to compress the LNG stored in the cargo tank by a pump and supply the compressed LNG to the engine as fuel; and a heat exchanger configured to liquefy a part of BOG, which is compressed by the compressor, by exchanging heat with BOG that is discharged from the cargo tank and transferred to the compressor.