Acronym NA
Category
Fisheries
Title RSW systems with CO2 as refrigerant (part ENØK05) Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Torgeir Skiple Coordinator email energy-research@sintef.no
Coordinator institution
NA
Institutions involved
NA
Start year 2005 End year 2006 Funding (€) € NA Website https://www.fhf.no/prosjekter/prosjektbasen/332052/ Summary The most commonly used refrigerant in RSW (refrigerated seawater) systems in fishing vessels today is HCFC-22 (R-22). The Montreal Protocol dictates the abolishment on HCFC refrigerants,
known to deplete the ozone layer if released to the atmosphere. HCFC-22 is no longer tolerated for use in new systems neither in Norway, nor EU.
Two groups of refrigerants are the alternatives today, that is the HFC’s and natural refrigerants. HFC’s are synthetic refrigerants foreign to nature and known to have relatively large global
warming potentials. The other group is the natural refrigerants which are substances already circulating in our biosphere. Possible refrigerants for fishing vessels are ammonia and carbon
dioxide (CO2). Ammonia is slightly toxic and flammable, thus requiring extra safety precautions which are cost driving. CO2 is non-toxic and non-flammable. If an energy efficient CO2 system
can be developed at acceptable cost figures, it represents a very interesting alternative for ship owners, and also for Norwegian suppliers of refrigeration equipment.
The main objective of the present project was to develop a CO2 RSW system for laboratory use.
Sub-goals included:
• Design of key components, control system and overall system configuration for a CO2 RSW system capable to operate sub- and trans-critically depending on sea water
temperatures
• Build a small capacity mobile test system
• Experimental test campaign in order to gain practical experience, verify theoretical results obtained by simulation and to compare the results to systems with alternative refrigerants
Keywords
Vessel technology;
Fishing technology;
Engineering;
Fishing vessels;
Marine Region
13
Northern North Sea (27.IVa)
14
Skagerrak, Kattegat (27.IIIa)
42
Barents Sea (27.I)
41
Norwegian Sea (27.IIa)
4
Marine Region Map
