closed cycle

noun

1. engineering a heat engine in which the working substance is continuously circulated and does not need replenishment

Example Sentences

The closed cycle of the old Japanese system, in which waste is plowed back into soil, is not as ubiquitous in today's farmlands.

From Salon

They, along with chickens and fish, would be a crucial protein supply in this closed cycle ecosystem for the space settlement’s residents.

From Slate

This is where Kauffman expands on his autocatalytic-sets theory, introducing concepts such as closure, in which processes are linked so that each drives the next in a closed cycle.

From Nature

“I came here aged 18 to play for Castilla, to experience the values and the loyalty. I had the fortune to coach Castilla, and now have this great responsibility to coach Real Madrid. It is a closed cycle, and I am very happy. Cristiano is a player I have always admired, and clearly the best in the world should be at Real Madrid.”

From The Guardian

“Our quest needs to be harnessing and transforming ubiquitous, safe natural resources like sunlight more efficiently. I believe we can last for years and years recycling the materials of life in a closed cycle system.”

From National Geographic