Thermostatic control
Thermostatic control - title
Thermostatic Control
Thermostatic control - overview
Control Function Overview
Author / organization: Oliver Gehrke / DTU
Versions: 0.5
Date: 30.05.2018
Methodology:The valve controller is represented as an idealized preportionaI-integral (PI) controller. i.e. without deadband or hysteresis. Practical thermostatic valves otten use mecha nieal regulators.
Thermostatic control - input output
Input and Output
Input variables :
- Space temperature
Output variables:
- Setpoint
Thermostatic control - Short description
Short Description
This control function describes a room or building thermostat, i.e. a function which regulates energy suppty into eg. a space heating radiator with the aim of keeping the temperature in the room or buitding consta nt at or neara desired value (setpoint).
The control function is described as having a single input and single output; i.e. buildings with multiple temperature controlled sub-velumes must either use multiple controllers, or be modelied as e singie, lumped volume.
Electric bioler aggregator - related document
Thermostatic control - details
Control Function Details
| Version No. | 0.5 | ||
| Date | 30/05/2018 | ||
| Author(s) | Oliver Gehrke |
http://en.wikipedia.org/wiki/PID_controller
Pl behaviour is achieved by setting the D term 01 a PID controller to zero.
| Use case example | Kasp differential pressure constant | ||
| Date created | 29/05/2018 | ||
| Actor | Resident/tenant | ||
| Description | When the heat loss of the temperature mntrulted space changes (due to changes in eutetde lempemture. opening of Windows ate) the controller changes the opening ole radiator valve to ensure constant temperature in | ||
| Preconditions | Continuous operations | ||
| Postconditions | Room temperature is constant | ||
| Priority | High | ||
| Frequency of use | Continuous operations | ||
| Normal course | Deviations of the measured value from the temperature setpoint cause the controller to command a correspondmg change in the radiator valve opening in order to bring the error (difference between measured and setpoint value) to zero, | ||
| Alternative course | None | ||
| Exceptions | - | ||
| Assumptions | - | ||
| Notes and issues | - |