Abstract

Poor thermal-coupling between sensor and surface is one of the most important factors causing inaccuracy in measurement. Different methods had been suggested by scientists to solve this issue. Embedding the sensor into an object was one of these methods. The goal of these simulations was to assess the impact of sensor coupling on measurement representativeness of wall surface temperature. For this purpose, a cylindrically-shaped sensor was embedded into the internal surface of the wall assembly. The levels of tightness varied from 10% to 90%, which corresponded respectively from very loose to very tight conditions. Also, in this process the impact of other factors such size and materiality of the sensors’ accuracy were evaluated and discussed briefly. In this study, the results proved that as the sensor decoupled more from the surrounding environment, more accurate data was generated from it. Also, the results from the simulations signified the importance of the temperature difference between the wall surface and the indoor air temperature. The temperature difference had a direct relationship with sensor accuracy and measurement representativeness, where smaller temperature difference was associated with higher accuracy.

Highlights

  • This major research project focussed on measurement accuracy of interior wall surface temperature

  • Following are two factors impacting the accuracy of the measurement: 1. Installing a sensor on the surface will distract the temperature distribution on the wall surface, no matter how small the sensor is

  • The sensor is partially attached to the surface and partially exposed to the ambient air, so the sensor output does reflect the surface temperature

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Summary

Introduction

This major research project focussed on measurement accuracy of interior wall surface temperature. This type of measurement is not entirely beneficial by itself but its study can be important for future scientific research and industrial uses. Following are two factors impacting the accuracy of the measurement: 1. Installing a sensor on the surface will distract the temperature distribution on the wall surface, no matter how small the sensor is. The assumption was that the surface was homogenous, meaning that installing the sensor on the surface does not distract the temperature distribution. While the aim of this research project was to investigate how the second factor above, the poor thermal-coupling, impacted the measurement accuracy

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