Aircraft power plant with heat management system

A method of mitigating heat generation in a thermal engine, the thermal engine having a combustion chamber having a volume periodically increasing and decreasing during operation of the thermal engine, the method comprising:

• transferring heat from the thermal engine to both of a lubricating oil and a coolant flowing within the thermal engine;
• and
• transferring the heat to an environment outside the thermal engine along:
• a first heat path extending from the coolant to the environment via a coolant-to-air heat exchanger;
• and
• a second heat path extending from the oil to the environment via the coolant through both of an oil-to-coolant heat exchanger and the coolant-to-air heat exchanger,
• wherein the transferring of the heat along the first heat path and the transferring of the heat along the second heat path are performed via a first coolant loop extending through the coolant-to-air heat exchanger and via a second coolant loop extending through the off-to-coolant heat exchanger.

An aircraft power plant, comprising:

• a rotary internal combustion engine having a combustion chamber of varying volume, the rotary internal combustion engine having housings defining respective coolant passages and defining an oil passage for lubrication, the rotary internal combustion engine having a rotor, the combustion chamber defined conjointly by the rotor and the housing, the volume of the combustion chamber varying with rotation of the rotor within the housing, the housings including a first side housing, a second side housing, and a rotor housing disposed between the first side housing and the second side housing, each of the coolant passages extending within respective one of the housings;
• and
• a heat management system, having:
• an oil-to-coolant heat exchanger having an oil conduit in fluid communication with the oil passage and a first coolant conduit in heat exchange relationship with the oil conduit and in fluid communication with the coolant passages;
• a coolant-to-air heat exchanger having a second coolant conduit in fluid communication with the coolant passages and an air conduit in heat exchange relationship with the second coolant conduit and in fluid communication with an environment outside the aircraft power plant, the respective coolant passages fluidly connected in parallel to the second coolant conduit;
• and
• a coolant manifold fluidly connected to the coolant-to-air heat exchanger the coolant passages connected in parallel to the coolant manifold,
• wherein the heat management system defines a heat transfer path from oil flowing through the oil passage to the environment via a coolant flowing through the coolant-to-air heat exchanger.