Glycol Pressure Drop Corrections for Hydronic Systems (Part 2)

Norm HallSelection and Specification, Curves, Glycol and Water Quality, Corrections, Monday Morning Minutes, Pumps, Glycol

Last week the article covered pressure drop correction calculations. Today we offer you some handy charts to use for second glycol correction pressure drop. Example: I have calculated the water piping pressure drop through a chilled water system to be 80 feet using the System Syzer. Question: What is the pressure drop if I have 50% Ethylene Glycol/Water with temperatures of 45°F to 55°F? Answer: The average temperature is 50°F, so my factor is 1.47. [Read more…]

Pressure Drop Corrections for Glycol in HVAC Systems (Part 1)

Norm HallMonday Morning Minutes, Pumps, Glycol, Selection and Specification, Curves, Glycol and Water Quality, Corrections

Question: I have selected my piping friction loss based on water, but I am pumping a glycol solution. What correction do I use? Answer: There are three glycol corrections when designing a hydronic or process cooling system; heat transfer correction, pressure drop correction, and pump curve correction. This R L Deppmann Monday Morning Minute defines the second of three glycol corrections. [Read more…]