High efficient heat reclaim with CO2

Kenneth Bank Madsen, Application Manager, Danfoss A/S, Denmark wrote this paper about "High efficient heat reclaim with CO2". 

Refrigeration systems with transcritical CO2 has been taking market shares the last years. Since 2007 the market in Denmark has turned from conventional refrigeration systems with HFC or cascade systems with CO2 and HFC towards transcritical CO2 systems. At this moment transcritical systems is everyday business and the technology is mature. The field studies carried out looking at refrigeration only shows that the annual energy consumption is on the same level as HFC DX systems. The article contains a short back ground on the theory behind heat reclaim in transcritical systems, and the efficiency will be compared with the efficiency of HFC systems.