An ammonia dual-fuel marine air conditioning refrigeration system, method and marine vessel

By introducing a liquid ammonia cooling capacity recovery heat exchanger and an air conditioning refrigerant water expansion tank into the air conditioning system of ammonia dual-fuel ships, and combining it with refrigerant R-1234yf with a GWP value of less than 150, the problems of ammonia fuel cooling capacity utilization and EU refrigerant restrictions have been solved, achieving energy conservation, emission reduction and safe operation.

CN118753488BActive Publication Date: 2025-12-05GUANGZHOU SHIPYARD INTERNATIONAL LTD
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Patent Information

Application Number
CN202410952111.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-16
Publication Date
2025-12-05
Estimated Expiration
2044-07-16

AI Technical Summary

Technical Problem

In the existing technology, the air conditioning system of ammonia dual-fuel ships cannot effectively utilize the cooling energy released when ammonia fuel heats up, resulting in high power consumption and failure to meet the EU's restrictions on high GWP refrigerants, which affects the maintenance and operation of ships in the EU region.

Method used

An indirect chiller system is adopted, which combines a liquid ammonia cooling capacity recovery heat exchanger and an air conditioning refrigerant water expansion tank. It is connected to the air conditioning chiller and air conditioner through a circulation pipeline. It utilizes ammonia fuel cooling capacity recovery and uses refrigerant R-1234yf with a GWP value of less than 150. Combined with safety protection measures, it achieves efficient utilization and safe storage of cooling capacity.

Benefits of technology

It enables the recovery and utilization of ammonia fuel cooling capacity, reduces electricity consumption, meets EU refrigerant restrictions, reduces carbon emissions, lowers safety protection costs, and ensures the normal operation of ships in the EU region.

✦ Generated by Eureka AI based on patent content.
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Abstract

The application discloses an ammonia dual-fuel ship air conditioning refrigeration system and method and a ship, and relates to the field of ship air conditioning refrigeration systems. The system comprises an air conditioning cold water unit system, a liquid ammonia cold energy recovery heat exchanger system, an air conditioning refrigerant water expansion tank and an air conditioner. The air conditioning cold water unit system, the liquid ammonia cold energy recovery heat exchanger system, the air conditioning refrigerant water expansion tank and the air conditioner are connected through circulating pipelines and corresponding valves. The air conditioning cold water unit system and the liquid ammonia cold energy recovery heat exchanger system are arranged in an ammonia fuel supply equipment room, and the air conditioning refrigerant water expansion tank and the air conditioner are arranged inside a driver's cabin. An air conditioning refrigerant water circulating pump is arranged on the circulating pipeline in the ammonia fuel supply equipment room. The application recovers and utilizes the cold energy of low-temperature stored ammonia fuel, solves the problem that a ship is difficult to maintain and replace refrigerant in the European Union region, saves electric energy of a dual-fuel ship, and plays a role in energy saving and emission reduction.
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