Industrial CO2 refrigeration systems

Group 4: Industrial CO2 systems

In this seminar we will review industrial CO2/NH3 cascade and CO2 trancritical systems. What are the differences on the two types of systems, what are the advantages and the disadvantages of them? How can they be made and pitfalls when designing and building them? What problems must be considered and solved when using Industrial CO2 transcritical flooded systems, and why will industrial CO2 transcritical system properly take over in the marine area, and on many land-based installations in the future.

CO2/NH3 cascade systems, how to make and control them. 
Hot gas defrost, how can it be made? 
Oil return systems, valve stations. 
Stand still cooling, “power failure (black ship) what happens? 
Cascade cooler, capacity regulation. 
Defrost compressor, if such one is used. 
Moisture in the CO2 system and what to do? 
Transcritical industrial CO2 systems what are the problems with these and how to solve them? CO2 transcritical systems with pumped liquid what are the problems? 
How can we solve the problems? 
What is the future for industrial transcritical CO2 systems? 

How can you build a CO2/NH3 cascade system with pump separator and hot gas defrost? Which kind of problems will you have to consider and solve in this type of systems? When and where will this type of systems be an advantage. What kind of problems are we facing on these types of installations? Industrial CO2 transcritical systems what are the advantages and the disadvantages?

Why are these systems nearly always build as DX systems? What must be done, and which problems must be solved before building good CO2 transcritical flooded systems with pump separator and hot gas defrost. Are we going to see more of these systems in the future and why?