Skip to main content

The thermostat in the boiler room

The complex performs automatic control of the boiler houses network  with the ability to monitor and adjust the algorithm through the global network.
Consists from hardware and software parts. Includes a thermostat in the boiler room and a manager.
Thermostat in the boiler room
The controller is a PC / 104 processor board (2xRS232, LPT, IDE, Ethernet, VGA, keyboard, mouse).
ROM - IDE M-Systems 256 Mb flash disk.
Sensors - case external temperature sensor (-40:+30°С); contact feed sensor (-5:+100°С), contact sensor of return water (-5:+100°С); Cabinet temperature sensor in the room (-5:+10°C). All sensors are built on thermistors.
Analog input - self-made device (4 analog inputs 8kHz -> RS232, galvanic isolation).
Discrete output - self-made device (Parallel port -> 8 relays);
Power supply, housing, a set of connecting wires.
Optionally - a CDMA modem with a directional antenna, a radio modem, a GSM modem, a wired telephone modem.
Software: Windows NT 4.0 SP6, LabVIEW Run-time Machine, Data Socket Server, thermostat program, manager program.
The program thermostat
Full automation of the boiler room operation. Implementation of on / off to 6 burners, control of one three-way valve. 
Implementation of the PID control algorithm. Table of PID coefficients for different types of buildings. 
Implementation of the 2 most common options for building heating circuits - with a pump on a small circuit and a pump on a large circuit; with the support of the effect of return water temperature and without. 
Realization of typical household settings of industrial thermostats: heating curves, day, night, weekend mode, timer, monthly circulation of the slave / master boiler, etc. 
Three-way valve control settings for different types of valves. 
Software restart of the entire system. 
Automatic software calibration of sensors using the approximation method. 
The ability to completely replace the thermostat program, without going to the site.
Separate distribution. No need to install additional packages and programs. Login by password. Monitoring the status of burners and temperature sensors. Forced on / off burners that do not affect the behavior of the temperature controller operation algorithm. Windows CE 6.0 module.
Data transfer
Accessing the Data Socket server installed on the site. Customizable access time. Customizable server broadcast time. The ability to receive / transmit data through the local network of the building, to which it is possible to connect the thermostat, or (if this is not possible) through a radio, GSM-, CDMA-, wired telephone modem. The maximum outgoing traffic of the thermostat (when transferring data with a frequency of 1 minute) is 40 MB. (for comparison, the minimum tariff of a CDMA connection offers the first 50 MB per month for free). OPC-server for connecting the thermostat to existing SCADA-systems.


  1. Your article isn’t only useful but it is additionally really informative. Thank you because you have been willing to share information with us. Thermistors for sale online in USA

  2. I am very happy to say that this is an interesting post. I learned new information from your article, you are doing a great job. Thanks for sharing this kind of blog. eaton vfd


Post a Comment

Popular posts from this blog

2D CNC engraver controlled by LabVIEW

Exhibition of scientific works of students "NTTM MAN-2017". Under my leadership, students won the third place among the collective developments. The guys presented the design of 2D CNC engraver controlled by LabVIEW. We used this engraver for summer practice work in my department of computer design and modelling. And we have results! There is a some examples. 

Automation of shooting a physical stationary object

The photo-shooting system for the electronic museum's  materials was automated by Moskalyuk Taras - a student of the Computer Science and Technology Faculty, under the my guidance. Automation is performed using the Lego NXT technology, which significantly approximates the end of work and improves the quality of the footage. The new shooting technology allows to expand the possibilities of creating three-dimensional images, up to 180 images per model, without complicating the process of shooting and processing raw materials. Science article was written .

LabVIEW based mathematical model of building’s heat consumption with non-stationary processes

In this article , the issue of non-stationary processes heat consumption by public buildings for the energy efficiency analysis in heating buildings is being considered. It is justified that the most suitable parameter for adapting the model to the specific building’s conditions is the total heat capacity of everything that is inside the building. As a developed model adaptation’s result there are empirical dependence of total heat capacity has been established for schools. The developed model was used for building’s heating simulation with a cyclically changing load in order to establish the possibility to saving the energy. After passing the preparatory adaptation, the sufficient correspondence of numerical experiments and the practical data on measurement of temperatures are justified. The model was solved using the LabVIEW programming environment. The model is confirmed for schools in Donetsk, for each school, the number of experiments is equal to the number of info