Hi,
I need to find a way to digitally replicate the behaviour of a thermistor.
The Project:
I am working on creating a close loop control to optimise the heating system in my block of flats. The heating system has two large identical boilers controlled by a compensator (Datasheet attached). The compensator can adjust the boiler temperature set point according to information from an external temperature sensor (calibration curve shown on page 9 of the datasheet and also plotted in one of the attachments to this post) and two room temperature sensors. In our setup however only the external temperature sensor is present. Without the room temperature signal the compensator works in open loop only.
My idea is to install a number of room temperature sensors and upload the data to a web server which will do the averaging. In the boiler room a Picaxe would connect to the web server, read the average temperature and adjust a digital potentiometer through (I2C) which acts as a room temperature sensor. I will be working with the heating engineer from the company which looks after the building.
My question for the forum is whether a digital potentiometer is appropriate for this project.
Many Thanks
Riccardo
View attachment 19194View attachment 19195
I need to find a way to digitally replicate the behaviour of a thermistor.
The Project:
I am working on creating a close loop control to optimise the heating system in my block of flats. The heating system has two large identical boilers controlled by a compensator (Datasheet attached). The compensator can adjust the boiler temperature set point according to information from an external temperature sensor (calibration curve shown on page 9 of the datasheet and also plotted in one of the attachments to this post) and two room temperature sensors. In our setup however only the external temperature sensor is present. Without the room temperature signal the compensator works in open loop only.
My idea is to install a number of room temperature sensors and upload the data to a web server which will do the averaging. In the boiler room a Picaxe would connect to the web server, read the average temperature and adjust a digital potentiometer through (I2C) which acts as a room temperature sensor. I will be working with the heating engineer from the company which looks after the building.
My question for the forum is whether a digital potentiometer is appropriate for this project.
Many Thanks
Riccardo
View attachment 19194View attachment 19195
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