Dual-fuel low-speed machine cooling system on LNG power ship

Abstract

The invention discloses a dual-fuel low-speed machine cooling system on an LNG power ship. The system comprises: an LNG gasification module, wherein the LNG gasification module comprises two sides capable of conducting heat exchange, one side of the LNG gasification module is connected into natural gas flow paths in series, and the other side of the LNG gasification module is connected into ethylene glycol flow paths in series; a cooling system heat exchanger, wherein the cooling system heat exchanger comprises two sides capable of exchanging heat, one side of the cooling system heat exchangeris connected into the ethylene glycol flow paths in series, and the other side of the cooling system heat exchanger is connected into fresh water flow pathes in series; and a dual-fuel low-speed machine. Cold energy generated by LNG fuel on the LNG power ship is recycled, the cold energy is transmitted to the dual-fuel low-speed machine cooling water system, and the purposes of reducing the dual-fuel low-speed machine cooling water temperature, optimizing and propelling the energy consumption index of the dual-fuel low-speed machine and improving the environmental friendliness are achieved.

Description

technical field [0001] The invention belongs to the technical field of ships, and in particular relates to a dual-fuel low-speed machine cooling system on an LNG-powered ship. Background technique [0002] With its clean, convenient and high calorific value, natural gas has become a new energy source to replace coal and oil. In the shipping industry, the use of LNG as fuel for ships has gradually become mainstream. Using natural gas as fuel can not only reduce 92% of nitrogen oxides and nearly 30% of carbon dioxide, but also does not contain sulfur and particulate matter, which is a clean and environmentally friendly green energy. In the LNG fuel supply system on board, the LNG booster pump is usually used with the gas supply module of the gasifier, and the heat source used to heat the LNG to make it vaporize is generally marine steam, and at the same time, the surrounding of the LNG fuel tank and the hull structure Also need to have heating device between, therefore, the ...

AI Technical Summary

Problems solved by technology

Since the seawater temperature is generally higher than 25°C, the cooling water temperature of the ship's dual-fuel low-speed engine in the traditional design cannot meet the requirements of the diesel engine design company

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