Enter the flow rate, temperature difference, specific heat, and correction factor into the calculator to determine the corrected heat transfer for a glycol system.

Glycol Correction Formula

The following formula is used to calculate the corrected heat transfer in a glycol system:

Qc = FR * ΔT * SH * CF * 500


  • Qc is the corrected heat transfer (BTU/hr)
  • FR is the flow rate (gallons per minute, gpm)
  • ΔT is the temperature difference (degrees Fahrenheit, °F)
  • SH is the specific heat of the glycol solution (BTU/lb°F)
  • CF is the correction factor (dimensionless)

To calculate the corrected heat transfer, multiply the flow rate by the temperature difference, specific heat, correction factor, and the constant 500.

What is Glycol Correction?

Glycol correction is the process of adjusting the heat transfer calculations in a system that uses glycol as a heat transfer fluid. Glycol solutions have different thermal properties than water, such as specific heat and viscosity, which affect the system’s heat transfer efficiency. The correction factor accounts for these differences and is used to ensure accurate calculations for system design and performance evaluation.

How to Calculate Corrected Heat Transfer?

The following steps outline how to calculate the corrected heat transfer for a glycol system:

  1. First, determine the flow rate (FR) in gallons per minute (gpm).
  2. Next, determine the temperature difference (ΔT) in degrees Fahrenheit (°F).
  3. Next, determine the specific heat (SH) of the glycol solution in BTU/lb°F.
  4. Next, determine the correction factor (CF) for the glycol concentration.
  5. Next, gather the formula from above = Qc = FR * ΔT * SH * CF * 500.
  6. Finally, calculate the corrected heat transfer (Qc) in BTU/hr.
  7. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Flow rate (FR) = 15 gpm

Temperature difference (ΔT) = 10 °F

Specific heat (SH) = 0.95 BTU/lb°F

Correction factor (CF) = 1.1