Review of a dynamic simulation approach for heating system sizing

In the context of the European Green Deal, the building stock in the European Union must undergo a thorough renovation to prepare to move away from fossil fuels and use low-temperature heat pump-based heating systems . Classic sizing methods for space heating system are based on a steady-state calculation for worst-case conditions to determine the necessary power.

A dynamic BES sizing methodology allows for the consideration of dynamic effects, such as thermal inertia, solar gains, internal gains, climatic conditions, and heating schedules. Results of this calculation method shows a more comprehensive assessment of the heating system load and its distribution that is more in accordance with the conditions of use. Adopting a sizing approach based on BES presents a promising method for minimising the impact of upgraded HVAC systems.