Principles of naval engineering - Historic Naval Ships Association

iPRINCIPLES OF NAVAL ENGINEERINGTHERMOSTATIC SWITCH L.P. R'12 LIQUID-Figure 19-15.— Refrigerant circulating type of mechanical cooling system.47.109ducts leading to the spaces to be cooled. Therefrigerant used in this system is usually R-12.Chilled Water Circulating SystemsTwo types of chilled water circulating systemsare used for mechanical cooling aboardship. Both systems utilize chilled water as thesecondary refrigerant, but one type uses R-12as the primary refrigerant and the other usesR-11. R-12 systems use reciprocating compressors;R-11 systems use centrifugal compressors.488