Closed loop

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Closed loop may refer to:

  • A feedback loop, often found in:
  • Closed ecological system not relying on matter exchange outside of the system, as opposed to open loop
  • Ecological sanitation systems or ecosan, intended to close the nutrient and water cycle
  • Pulling water from one area of a reef aquarium and pumping it immediately elsewhere in the tank to create higher flow and minimize dead spots
  • Circular economy, one in which materials are consistently reused rather than discharged as waste
  • Closed time loop, or predestination paradox, a paradox of time travel that is often used as a convention in science fiction
  • Closed curve, a mathematical curve described as a set of continuous parametric equations over a closed interval of real numbers for which the start point equals the end point

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