Integrated updating method of LNG (Liquefied Natural Gas) ship power system

Abstract

The invention relates to an integrated updating method of an LNG (Liquefied Natural Gas) ship power system and belongs to the technical field of ships. Improvement devices used in the integrated updating method of the LNG ship power system comprise an LNG low-temperature gas storage tank, a vaporizer, an LNG gas supply pipeline, a double-wall pipe ventilation pipeline, an LNG single-fuel engine, a gas valve component unit, a flammable gas detector and a fire alarm; an engine is replaced by the LNG single-fuel engine; the LNG low-temperature gas storage tank is arranged on a deck at the tail of a ship and is connected to the LNG single-fuel engine; the LNG gas supply pipeline is arranged in the double-wall pipe ventilation pipeline; the flammable gas detector is arranged in a cooling box of the LNG low-temperature gas storage tank; the flammable gas detector and the fire alarm are arranged inside an LNG single-fuel engine cabin to complete the improvement of a power system. Through the integrated updating method of the LNG ship power system, an application method for replacing oil with gas can be greatly improved; the improvement strength is reduced; the energy conservation and environmental protection benefits are increased.

Description

technical field [0001] The invention relates to a method for updating the overall power system of an LNG ship, in particular to the arrangement and method for the overall update of the power system of an existing diesel-powered ship, and belongs to the technical field of ships. Background technique [0002] As a clean and efficient gas fuel, natural gas has become an important energy source for economic development in the 21st century due to its remarkable characteristics in terms of environmental impact and energy efficiency. The development of liquefied natural gas (LNG) technology is accompanied by progress in energy technology, low temperature technology, and material technology. Because LNG can greatly save storage and transportation space and cost, and has the characteristics of large calorific value and high performance, it is widely used in automobiles and ships. , Aircraft, trains and other means of transportation and cold energy utilization and other fields. [...

AI Technical Summary

Problems solved by technology

Practice has proved that the transformation of ship power system adopts co-combustion technology, the replacement rate of LNG is not high, and the discharge of pollutants does not meet the requirements, which is not conducive to the environmental protection of the atmosphere and water

At present, the shipping market is severely overcapacity, and it is very difficult to really promote the use of LNG fuel for new ships; at the same time, the price of oil and gas is inverted, and the enthusiasm of ship owners to use LNG as an alternative fuel is not high.

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