A fuel cold energy utilization system for ammonia-powered container ships

Abstract

The invention discloses an ammonia-powered container ship fuel cold energy utilization system. The system mainly includes an ammonia fuel supply system and a refrigerated container refrigeration system. When ships consume ammonia fuel during navigation, using the cold energy released by ammonia fuel to refrigerate refrigerated containers can not only reduce the consumption of heat sources during the gasification process of ammonia fuel, but also reduce the load on the ship's power grid, and solve the problem of ammonia-powered container ships. Refrigeration causes the problem of large load on the ship's power grid, and realizes the rational use of energy. The structure of the system is relatively simple. While using the cold energy of ammonia fuel to refrigerate the refrigerated container, the original refrigeration system of the refrigerated container can also be retained. There is no need to make too many modifications to the original refrigerated container structure, and it is relatively easy to implement on ships. , provide support for promoting the application of ammonia fuel in ships, and promote the early realization of the goal of carbon neutrality, so the present invention has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of ships, and in particular relates to an ammonia-powered container ship fuel cold energy utilization system. Background technique [0002] At present, ships mainly use traditional fuel oil as fuel, but the combustion of fuel oil will produce a large amount of nitrogen oxides and sulfur oxides, causing serious air pollution, especially the main engine power of container ships is large, burning fuel oil will release more pollutants , the pollution problem is more serious. In recent years, the International Maritime Organization (IMO) has put forward strict requirements on the emission reduction of ships, and the country has also actively advocated the green development of ships. In order to solve this problem, relatively clean energy sources such as LNG (liquefied natural gas -163℃) have emerged , liquid hydrogen (-253℃), methanol, etc. Among them, LNG is more widely used on ships. The use of LNG fuel can gr...

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Problems solved by technology

However, other low-temperature fuels such as ammonia fuel and LNG need to be vaporized to the temperature of the air supply before being sent to the main engine of the ship for combustion. This process will release a large amount of cold energy. Since the main engine power of the container ship is relatively large, the amount of fuel required is also more , so more cold energy is released. If this part of fuel cold energy is directly taken away by seawater and air, it will cause waste of cold energy

[0005] Some patents have proposed the utilization of the cold energy of LNG fuel in ships, and the patent No. CN 211336398 U proposes a system and method for utilizing the cold energy of LNG in ships by refrigerated containers, using ethylene glycol solution as a refrigerant to exchange heat with LNG fuel , the refrigerant flows through the pipelines in turn, and the coils in the refrigerated container transfer the cold energy to the refrigerated container, which can make use of the cold energy of the LNG fuel. Adding heat exchange coils will occupy the cargo space of the refrigerated container, and the number of refrigerated containers is large, making implementation difficult and costly

[0006] The refrigerated containers on the container ship need to be refrigerated by refrigeration units. Due to the large number of refrigerated containers on the container ship, it will consume a large amount of electric energy of the ship's power grid

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