Energy Flexibility of Residential Buildings with Phase Change Materials

The present talk represents a new assessment of energy flexibility in residential buildings in Uzbekistan by combining the IEA Annex 67 Flexibility Evaluation Tool (FET) with a Taguchi optimisation of phase change material (PCM) properties. Dynamic simulations show that PCMs can shift heating loads, reduce peaks, and enhance demand-response performance. By varying PCM parameters, we identify melting temperature and density as the strongest drivers of short-term flexibility, while thickness and latent heat govern larger energy-shifting potential. It has to be noted that the integrated PCM–FET–Taguchi approach is the first applied to a Central Asian climate and provides actionable guidance for designing buildings that better support low-carbon, flexible energy systems.