Does the calculation of the flow rate for a circulating water pump need to take into account the temperature drop along the pipeline?
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May I ask, the temperature at the outlet of my boiler is 95 degrees. After passing through the 9-kilometer external network, it reaches the heat exchange station. The temperature drop during construction is 5 degrees. The return water temperature is 70 degrees. When calculating the water pump flow rate, do I need to take the temperature drop into account? Should I use 95 degrees/65 degrees, or 90 degrees/70 degrees?
The calculation of the flow rate for circulating water pumps generally requires taking into account the temperature drop along the pipeline. In your case, it is recommended to calculate the water pump flow rate using 90 degrees/70 degrees. Because during the circulation process, the boiler outlet temperature gradually decreases, and this temperature drop becomes more significant after being transported over long distances through pipes. The return water temperature also has a certain impact on the flow rate of the water pump; therefore, it is necessary to take into account the temperature drop along the pipeline when calculating the water pump’s flow rate. .
This takes into account the temperature drop along the way, as your calculation is aimed at determining the heat required by the heat exchange station
When calculating the heat exchangers in a heat exchange station, the temperature drop must be taken into account, but what about calculating the diameter of the primary piping network and the circulation pumps for that network?
Because when temperature drop is taken into account, the amount of hot water circulating in the system differs from that when no temperature drop is considered, so both the circulation pump and the diameter of the piping network will change