Carbon dioxide based natural circulation loops: Application to refrigeration and air conditioning systems http://127.0.0.1/xmlui/handle/123456789/704 2026-04-16T03:11:40Z Carbon dioxide based natural circulation loops: Application to refrigeration and air conditioning systems http://127.0.0.1/xmlui/handle/123456789/705 Carbon dioxide based natural circulation loops: Application to refrigeration and air conditioning systems Kupireddi, Kiran Kumar Studies carried out in recent times show that carbon dioxide (CO2) can be used as a secondary refrigerant in forced or natural circulation loops (NCLs). However, literature review shows that studies on CO2 based NCLs are scarce. 2010-01-01T00:00:00Z