Developing an Algorithm to Improve the Temperature Accuracy of Room Thermostats

HVAC&R systems focused on ensuring comfort standards in indoor temperature and air quality. Room thermostats are user interfaces of the HVAC&R systems. In this article, we will examine the factors that affect indoor air temperature measurements of room thermostats’ internal temperature sensors. With this work, we will create an algorithm that reduces the deflection on temperature measurements of room thermostats. During this study, we will inspect deviations between temperature measurements from room thermostats and reference sensors. We will apply some tests to understand the cause of the deviations and develop an algorithm to eliminate them. We will repeat tests until find the best algorithms that clear all errors in room thermostats’ temperature measurements. As a consequence of the tests, we discovered that the internal temperature sensor of the room thermostat can be affected by electronic component heating. Based on this information, we applied different tests and created a time-based pattern that shows the deviation of temperature measurements, and we created an algorithm based on that.