Received 08.01.2025, Revised 14.05.2025, Accepted 25.06.2025
The growing demand for energy-efficient buildings and the desire to reduce greenhouse gas emissions require the introduction of innovative approaches to thermal energy management in buildings. One of these approaches is the use of phase transition materials that provide thermal energy storage and increase the thermal inertia of building structures, making them an effective solution for optimising the energy efficiency of buildings in different climatic conditions. The purpose of the article was to analyse the existing methods of using phase-transition materials to improve the energy efficiency of buildings by accumulating thermal energy. In particular, the methods of incorporating such materials into the building envelope and using them in thermal accumulators were investigated. The article applies the methods of analysis and systematisation of scientific literature, in particular, the results of studies on the impact of phase transition materials on the thermal inertia of building structures, the efficiency of their use in thermal accumulators and the impact on the energy efficiency of buildings. It has been established that the use of phase transition materials contributes to a significant increase in the thermal inertia of buildings and a reduction in heat energy losses. Different methods of incorporating phase transition materials into the building envelope and their use in thermal accumulators are analysed. The main advantages and disadvantages of each method are identified, and examples of their practical application are given. Possible ways of using thermal accumulators to improve the energy efficiency of buildings, in particular, their inclusion in heating and hot water supply systems, are highlighted. The results of the study can be used in the design of energy-efficient buildings, heating and hot water systems that use phase-transition materials for thermal energy storage, which will help reduce energy consumption and increase living comfort
phase transition materials; paraffin; enclosing structures; thermal inertia; latent heat