Overview of the development and status of carbon dioxide (R-744) refrigeration systems onboard fishing vessels

Globally, most fishing vessels still use the ozone-depleting and climate-harmful R-22 in their freezing refrigerated seawater (RSW) systems. However, some regions, natural refrigerant ammonia is preferred refrigerant. Another refrigerant, carbon dioxide (R-744), becoming a viable option increasingly used onboard. This will not exclude ammonia, but rather be good alternative to it meet demand for different cooling/freezing needs post-R-22 There are currently major developments R-744 refrigeration technology that widening potential applications of R-744. These include compressors with larger capacities, more energy-efficient components, system designs lower temperatures integration heat recovery thermal storage. paper provides review development systems onboard vessels. It includes description commonly cooling methods technology, especially within component design, capacity performance. also current status technologies Although there limited publications on vessel applications, shows positive prospects utilizing further research innovation this topic recommended.