Abstract
It is well-known that on-site measurements are suitable for verifying the actual thermal performance of buildings. Performance assessed in situ, under actual thermal conditions, can substantially vary from the theoretical values. Therefore, experimental measurements are essential for better comprehending the thermal behavior of building components, by applying measurement systems and methods suitable to acquire data related to temperatures, heat flows and air speeds both related to the internal and external environments. These data can then be processed to compute performance indicators, such as the well-known thermal transmittance (U-value). This review aims at focusing on two experimental techniques: the widely used and standardized heat flow meter (HFM) method and the quite new thermometric (THM) method. Several scientific papers were analyzed to provide an overview on the latest advances related to these techniques, thus providing a focused critical review. This paper aims to be a valuable resource for academics and practitioners as it covers basic theory, in situ measurement equipment and criteria for sensor installation, errors, and new data post-processing methods.
Highlights
Nowadays, the concept of energy efficient and sustainable building is widely accepted and pursued [1]
The main objective of the environmental performance of buildings is associated with the use of carbon, it is necessary to consider the thermal performance of building fabrics as a key factor [2]
heat flow meter (HFM) and THM methods to obtain a global view about the theoretical knowledge and the As already mentioned, the theoretical method cited in the Standard ISO 6946 [9] is resulting needs in terms of future developments based on the literature review
Summary
The concept of energy efficient and sustainable building is widely accepted and pursued [1]. This approach brings us to the therAs already mentioned, the theoretical method cited in the Standard ISO 6946 [9] is mal resistance concept. It can be applied for building walls, characterized by known strabased on the well-known thermal-electrical analogy. The total thermal resistance of a wall can be assessed considering resistance concept It can be applied for building walls, characterized by known stratigboth the structure and the internal and external heat transfer, in terms of surface thermal raphy. There is a correlation between thermal transmittance and thermal resistance because one is the inverse of the other: U=
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
