.Buildings.Templates.Plants.HeatPumps.Validation.AirToWater .Buildings.Templates.Plants.HeatPumps.Validation.AirToWaterThis model validates Buildings.Templates.Plants.HeatPumps.AirToWater by simulating a 24-hour period with overlapping heating and cooling loads. The heating loads reach their peak value first, the cooling loads reach it last.
Three equally sized heat pumps are modeled, which can all be lead/lag alternated.
A heat recovery chiller is included (pla.have_hrc_select=true)
and connected to the HW and CHW return pipes (sidestream integration).
A unique aggregated load is modeled on each loop by means of a cooling or heating
component controlled to maintain a constant ΔT
and a modulating valve controlled to track a prescribed flow rate.
An importance multiplier of 10 is applied to the plant requests
and reset requests generated from the valve position.
The user can toggle the top-level parameter have_chiWat
to switch between a cooling and heating system (the default setting)
to a heating-only system.
Advanced equipment and control options can be modified via the parameter
dialog of the plant component.
Simulating this model shows how the plant responds to a varying load by
By default, all valves within the plant are modeled considering a linear
variation of the pressure drop with the flow rate (pla.linearized=true),
as opposed to the quadratic relationship usually considered for
a turbulent flow regime.
By limiting the size of the system of nonlinear equations, this setting
reduces the risk of solver failure and the time to solution for testing
various plant configurations.
| Name | Description |
|---|---|
 Medium | Main medium (common for CHW and HW) |