HEAT MANAGEMENT SYSTEM FOR SPACECRAFT

A heat management system especially adapted for spacecraft including a first heat exchanger in heat exchange relation with a sink having a widely varying temperature and a second heat exchanger in heat exchange relation with a variable heat load. An equilibrator is provided to maintain respective bodies of heat exchange fluid in the liquid state and in the gaseous state. A first flow path is provided for circulating a mixture of liquid phase fluid and gaseous phase fluid from the equilibrator to the first heat exchanger and return fluid from the first heat exchanger to the equilibrator. A second flow path circulates liquid phase fluid from the equilibrator to the second heat exchanger and returns fluid therefrom to the equilibrator.