Plant sizing: how to choose the design loop exit temperature and temperature difference ?
I have a hot water loop with everything set to 40 °C:
- The design water outlet temperature of my Boiler.
- The setpoint manager (Hot water temperature schedule, including design day profiles).
- The rated Inlet water temperature of my Coils.
The flow rate and capacity of systems are autosized.
My question is about these two fields:
What is the right way to choose these parameters ? I have observed they have a significant impact on simulation results. Depending on theses values, I also have some sizing errors (it seems that I need a high value for Design Loop Exit Temperature).