.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) |