modelSpeedControlled
Test model for the sensible heat recovery wheel with a variable speed drive
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
Example for the model Buildings.Fluid.HeatExchangers.ThermalWheels.Sensible.SpeedControlled.
This example considers two wheels:
wheUseDefCur employs a user-defined efficiency curve;
wheDefCur employs a default efficiency curve
The input signals are configured as follows:
- The supply air temperature TSup changes from 273.15 + 30 K to 273.15 + 40 K during the period from 60 seconds to 120 seconds. The exhaust air temperature remains constant.
- The wheel speed uSpe changes from 0.7 to 1 during the period from 200 seconds to 360 seconds.
- The supply air flow rate and the exhaust air flow rate are constant.
The expected outputs are:
-
The sensible heat exchanger effectiveness
epskeeps constant before the 200 seconds; after 200 seconds, it increases. - The leaving supply air temperature and the leaving exhaust air temperature follow the change of TSup before the 200 seconds. After 200 seconds, the leaving supply air temperature decreases and the leaving exhaust air temperature increases.
-
The power consumption of the instance
wheUseDefCuris higher than that of the instancewheDefCurwhen uSpe is less than 1. The power consumption of those two instances are identical when uSpe equals 1.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Fluid.HeatExchangers.ThermalWheels.Data.ASHRAE | per | Performance record for the sensible heat wheel | |
| Buildings.Fluid.HeatExchangers.ThermalWheels.Data.ASHRAE | perDefMotCur | Performance record for the sensible heat wheel with default motor curve |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Fluid.Sources.Boundary_pT | sin_2 | Exhaust air sink | |
| Buildings.Fluid.Sources.Boundary_pT | sou_2 | Exhaust air source | |
| Modelica.Blocks.Sources.Ramp | TSup | Supply air temperature | |
| Buildings.Fluid.Sources.Boundary_pT | sin_1 | Supply air sink | |
| Buildings.Fluid.Sources.Boundary_pT | sou_1 | Supply air source | |
| Buildings.Fluid.HeatExchangers.ThermalWheels.Sensible.SpeedControlled | wheUseDefCur | Wheel with a user-defined curve | |
| Modelica.Blocks.Sources.Ramp | wheSpe | Wheel speed | |
| Buildings.Fluid.Sensors.TemperatureTwoPort | senExhTem | Temperature of the exhaust air | |
| Buildings.Fluid.Sensors.TemperatureTwoPort | senSupTem | Temperature of the supply air | |
| Buildings.Fluid.HeatExchangers.ThermalWheels.Sensible.SpeedControlled | wheDefCur | Wheel with a default curve |
Contents
| Name | Description |
|---|---|
 Medium | Air |
Revisions
-
January 8, 2024, by Sen Huang:
First implementation.