The following procedure is involved in DETERMINING the factors used inside the heat exchanger tubes that are varying with the temperatures.

These are as follows:

• Determine the average of the temperature by TAKING the mean of all the temperatures stored in the processing line.
• Check the condition of the fluid entering the line at around 300 CELSIUS and leaving at around 280 Celsius.
• Determine the physical properties at the temperature of 290 Celsius and the FRICTION factors of the tubes at the same temperature.

USE the formula to calculate the friction factor of the laminar flow in the case where the liquid is cooling: Mean temperature/((sum of viscosity/wall viscosity)*0.38) Where Bulk and wall is determined at mean temperature over the length of line.

Use the formula to calculate the friction factor of the turbulent flow in the case where the liquid is cooling:

(Mean temperature + bulk properties / ((sum of viscosity/wall viscosity)*0.11))/ (bulk viscosity/wall viscosity)*0.17.

The following procedure is involved in determining the factors used inside the heat exchanger tubes that are varying with the temperatures.

These are as follows:

Use the formula to calculate the friction factor of the laminar flow in the case where the liquid is cooling: Mean temperature/((sum of viscosity/wall viscosity)*0.38) Where Bulk and wall is determined at mean temperature over the length of line.

Use the formula to calculate the friction factor of the turbulent flow in the case where the liquid is cooling:

(Mean temperature + bulk properties / ((sum of viscosity/wall viscosity)*0.11))/ (bulk viscosity/wall viscosity)*0.17.