Improved procedure for the construction of a Typical Meteorological Year for assessing the energy need of a residential building

The reliability and representativeness of climatic data play a fundamental role in the assessment of building energy performance. Most widely used calculation tools make use of Typical Meteorological Years (TMYs), which can be used for several applications, such as the design or verification of energy performance of buildings, and the rating of technical systems. The goal of this work is to verify the representativeness of the ISO 15927-4 methodology for TMY generation with the aim of assessing the annual energy needs for single and aggregated energy services. To this purpose, different climate variables were processed and correlated with each other, with different weighting coefficients. Subsequently, several residential building types with varying envelope features (thermal insulation, mass, WWR) were simulated by means of a dynamic simulation. An improved TMY construction procedure, based on different weightings of weather variables in relation to the building thermal features and to the purpose of the calculation, is proposed.