Engine takes in heat...

Dissipated by a refrigerator...

Lost by the air inside the refrigerator...

At a cold reservoir...

Given off to the air around a refrigerator...

Released by the refrigerant...

Behind the refrigerator...

At a hot reservoir...

When an object is cooled by a refrigerator...

Absorbed by the engine...

Gained by the gas of a heat engine...

Lost as exhaust...

Inside the refrigerator...

Released by the gas of a heat engine...

Heat added to an engine...

Outside the refrigerator...

After the piston of a heat engine...

At the boiler...

Absorbed by the refrigerant...