Podcast
Questions and Answers
What happens if the pH drops below 7 in the system?
What happens if the pH drops below 7 in the system?
What is the main difference between propylene and ethylene glycols in terms of pumping power?
What is the main difference between propylene and ethylene glycols in terms of pumping power?
Why must propylene glycol be mixed at a higher concentration compared to ethylene glycol?
Why must propylene glycol be mixed at a higher concentration compared to ethylene glycol?
What is the impact of low glycol concentrations in closed loop systems?
What is the impact of low glycol concentrations in closed loop systems?
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Why should automatic municipal water make-up not be used in glycol systems?
Why should automatic municipal water make-up not be used in glycol systems?
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What is the primary purpose of adding glycol to closed system heating or cooling water?
What is the primary purpose of adding glycol to closed system heating or cooling water?
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Which type of glycol is toxic and should not be used where contact with food products may occur?
Which type of glycol is toxic and should not be used where contact with food products may occur?
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Why should automotive glycol not be used in industrial closed loop systems?
Why should automotive glycol not be used in industrial closed loop systems?
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What is a good indicator of whether glycol contains adequate inhibitor in a system?
What is a good indicator of whether glycol contains adequate inhibitor in a system?
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What happens if ethylene glycol and propylene glycol are used together in a closed system?
What happens if ethylene glycol and propylene glycol are used together in a closed system?
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Study Notes
pH and System Impact
- A pH drop below 7 indicates increased acidity, potentially leading to corrosion in metal components and reduced effectiveness of inhibitors in a closed system.
Differences in Pumping Power
- Propylene glycol requires higher pumping power compared to ethylene glycol due to its higher viscosity, resulting in increased energy consumption for circulation.
Concentration Requirements
- Propylene glycol must be mixed at a higher concentration than ethylene glycol to achieve similar freeze protection levels, due to its lower heat transfer efficiency.
Low Glycol Concentrations
- Low glycol concentrations in closed-loop systems can lead to inadequate freeze and corrosion protection, risking system integrity and efficiency.
Municipal Water Make-Up
- Automatic municipal water make-up should not be used in glycol systems as it may introduce impurities and alter glycol concentration, compromising system performance.
Purpose of Glycol Addition
- The primary purpose of adding glycol to closed system heating or cooling water is to prevent freezing and provide corrosion protection for system components.
Toxicity of Glycols
- Ethylene glycol is toxic and should never be used in settings where contact with food products may occur due to its hazardous health effects.
Automotive Glycol Limitations
- Automotive glycol is not suitable for industrial closed-loop systems as it often contains inhibitors specific to automotive applications that may not be effective in a different environment.
Indicator of Inhibitor Adequacy
- A good indicator of adequate inhibitor presence in a glycol system is the measurement of pH levels; a stable pH suggests effective inhibitor concentration.
Mixing Ethylene and Propylene Glycol
- Mixing ethylene glycol and propylene glycol in a closed system can lead to unpredictable properties, reducing effectiveness and potentially causing compatibility issues between the two substances.
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Description
Learn about the use of glycol in closed system heating or cooling water to prevent freezing damage. Understand the differences between ethylene glycol and propylene glycol, including their toxicity and suitable applications.
