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Ethylene glycol: its use in thermal storage and its impact on the environment.

Author(s) : ROGERS E. C., STEFL B. A.

Summary

Ethylene glycol is a commonly used brine in thermal storage systems to reduce the freezing point of the heat transfer fluid so that ice or chilled water can be produced. Compared to salt brines, methanol, and propylene glycol, ethylene glycol has been the fluid of choice for thermal storage because it is a very efficient freeze-point depressant, gives flexibility in solution strength, has good heat transfer properties and low vapour pressure, and is not flammable. Ethylene glycol is readily biodegradable in both water and soil. It is also relatively nontoxic to aquatic life. Toxicity is discussed. Recycling of used formulated ethylene glycol-based heat transfer fluid is becoming increasingly popular through methods of filtration, ion exchange, and distillation. Regulations on ethylene glycol at federal, state, and local levels should be studied to ensure compliance with legal requirements.

Details

  • Original title: Ethylene glycol: its use in thermal storage and its impact on the environment.
  • Record ID : 1994-0903
  • Languages: English
  • Subject: Environment
  • Source: ASHRAE Transactions 1993.
  • Publication date: 1993
  • Document available for consultation in the library of the IIR headquarters only.

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