Ship Gas Re-Vaporizing Layout With Internal Heat Source Supply
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Solution Overview
Problem
Existing LNG re-vaporizing systems on ships face inefficiencies in energy exchange and high construction costs due to the placement of heat exchangers and pumps on upper decks, leading to long seawater lines and reduced space utility.
Innovation Solution
The system includes a heat source supply apparatus with a heat source pump, seawater heat exchanger, and circulation lines sectioned by decks, with seawater and steam heat exchangers disposed inside the ship body, using non-explosive refrigerants like glycol water, and a pressure maintaining device to enhance efficiency and reduce construction costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If LNG is stored in large quantities on board the ship, then the ship's cargo capacity and operational range are improved, but the risk of gas accumulation and explosion increases
Solution Approach 1:
The invention utilizes the harmful leaked LNG gas by directing it to vaporization engines where it is converted into useful mechanical work. The gas that would otherwise accumulate and create explosion risks is instead burned in controlled combustion processes, generating power to drive ship auxiliaries or main engines, thus transforming a hazardous byproduct into a valuable energy source
Solution Approach 2:
The invention introduces vaporization engines as an intermediary system between the LNG storage tanks and the atmosphere. Instead of allowing direct release of LNG gas into the cargo hold or environment, the system uses specialized engines to intermediate the gas flow, controlling vaporization and combustion processes to safely manage gas release while generating useful work in the process
2Device complexity
If LNG is vented directly to the atmosphere or cargo hold, then the system complexity is reduced, but energy is wasted and environmental pollution increases
Solution Approach 1:
The invention converts the wasted energy in vented LNG gas into useful work by directing the gas to vaporization engines. The chemical energy in the LNG that would be lost to the atmosphere is instead harnessed through controlled combustion to generate mechanical power, simultaneously reducing energy waste and eliminating the need for complex recovery systems
Solution Approach 2:
The vaporization engines serve dual functions: they vaporize the LNG gas for safe release while simultaneously generating useful mechanical work to power ship auxiliaries or main engines. The system essentially serves itself by using the fuel (LNG gas) to power the very process that manages its own vaporization and release, eliminating the need for separate external power sources
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration maximizes liquefied gas re-vaporization efficiency while minimizing construction costs and improving system reliability by reducing the length of seawater lines and allowing compact, modular installation within the ship.
Implementation Method 1
the vaporization engine to be coupled to a crankcase of the vaporization engine. The vaporization engine may be any type of internal combustion engine
Data Source
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AI summary
A ship including a gas re-vaporizing system according to the present invention includes: a ship body; a vaporizer which is arranged in an upper portion of the ship body, and vaporizes liquefied gas and supplies the vaporized liquefied gas to a demander; and a heat source supply apparatus which is arranged inside the ship body and supplies a heat source to the vaporizer.