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Abstract
This paper aims at providing sizing information concerning a thermal storage system in the case of a low energy consumption building (<50kWh/m2y). Numerical simulations for a reference individual building were run for 23 different cities in Europe. Results show a clear correlation between annual heat demand Qy and annual heating degree-day (HDD): Qy=f1(HDD). There is also a good correlation between power demand and HDD. But as heat coverage of the entire heating period may be too ambitious, the analysis goes further. It presents a correlation between heating demand Q and HDD as a function of the storage system autonomy t of the form Q=1-exp-tτ×Qy with τ=f2(HDD). It also gives the absolute distribution of sorted power demand values as a function of HDD in the form of a power sizing chart. The purpose of this chart is to provide specifications for the sizing of a thermal storage system intended to partially cover energy needs and power demand of a low energy residential house.
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