Indirect evaporative cooling

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Indirect evaporative cooling (IEC) is a method of cooling air without adding moisture to the air supplied to a building. [1]

Contents

How it works

Indirect evaporative cooling uses two separate air streams and an air-to-air heat exchanger. Water evaporates into a secondary air stream. Heat moves through the heat exchanger from the primary air stream to the secondary air stream. [1] The cooled primary air is delivered to the building without added humidity. An indirect evaporative cooling system includes a heat exchanger, a water distribution system, and fans. [2] Direct evaporative cooling adds moisture directly to the supply air. [1]

Performance

Indirect evaporative cooling performs best in dry climates. [2] Testing by the National Renewable Energy Laboratory showed lower energy use compared to conventional air conditioning in dry regions. [3] Indirect evaporative cooling is used in commercial, industrial, and residential buildings. [4] It is also used in data centers and ventilation systems. [5]

References

  1. 1 2 3 "Functions". ASHRAE Technical Committee 5.7.
  2. 1 2 Indirect Evaporative Cooler (PDF) (Report). U.S. General Services Administration.
  3. ↑ Multistaged Indirect Evaporative Cooler Evaluation (PDF) (Report). National Renewable Energy Laboratory.
  4. ↑ Pandey, Avinash; Jhinge, P.K. (2015). "Indirect Evaporative Cooling Applications: A Review" (PDF). International Journal for Scientific Research & Development. 3 (3): 1. ISSN   2321-0613.
  5. ↑ Mohammed, Ramy; El-Morsi, Mohamed; Abdelaziz, Omar (2022-06-01). "Indirect evaporative cooling for buildings: A comprehensive patents review". Journal of Building Engineering. 50. doi:10.1016/j.jobe.2022.104158. ISSN   2352-7102 – via Science Direct.
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