ARE Exam Prep: Glycol for PPD & PDD | ARE Lab
Автор: ARE Lab
Загружено: 2026-03-16
Просмотров: 24
Описание: This video provides a comprehensive overview of glycol cooling and freeze protection systems used in HVAC, fire sprinters, and industrial applications. The primary function of adding glycol to water is to lower the freezing point, thereby preventing pipe bursts and equipment damage in components exposed to cold outdoor air. While effective for safety, using these mixtures reduces thermal efficiency and requires higher pumping power due to increased fluid viscosity. The text distinguishes between ethylene and propylene glycol, noting that the latter is preferred in sensitive environments like food plants due to its lower toxicity. Furthermore, it highlights specific maintenance needs and regulatory codes that govern the use of antifreeze in fire suppression systems to ensure both reliability and safety.
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