Natural Refrigerant on Board Marine Vessels

The paper deals with the topic of refrigerants, their historical evolution, applied legislation and trends in maritime affairs. Regarding the Environmental care paper considers the impact of refrigerants of refrigeration systems, both on stationary plants on land and on plants on board. New regulations of the European Union, and IMO maritime organization, require the reduction and complete abolition of harmful synthetic refrigerants and the introduction of new refrigerants that will have a significant economic and environmental impact. The trend is the introduction of natural refrigerants as a replacement for existing environmentally unacceptable ones. On-board refrigeration systems introduce natural refrigerants such as ammonia and carbon dioxide into applications that require lower refrigeration temperatures. Absorption cooling plants are introduced into air conditioning applications on board the ship. They work with water/lithium bromide (H2O/LiBr) mixtures, thus increasing the efficiency of the plant and reducing the impact on the environment.