Here's what's happening (assuming you didn't set the flow rates/capacities manually):
- E+ calculates the heating and cooling load for each zone
- E+ looks at the Sizing:Zone object to see what the assumptions for heating/cooling supply air temp are
- Based on the load and the supply air temps, E+ calculates the flow rate of air at that temp that is required to meet the load.
- The fan power is based on the required flow rate and the user input fan pressure rise. If you don't modify the fan pressure rise, E+ will use the default. You can view/edit the defaults for the pressure rise by clicking on the fan.
- If there are hot or chilled water coils on the loop, E+ looks at the Sizing:System for the air loop and the Sizing:Plant object and calculates hot/chilled water flow rates required for the coils to meet their loads.
- Pumping power is based on the require flow rate and the user input pump pressure rise. If you don't modify the pump pressure rise, E+ will use the default. You can view/edit the defaults for the pressure rise by clicking on the pump.
