Phase change materials (PCMs) are now widely known as potential additives for building insulation materials to provide a thermal mass effect that helps conserve energy and maintain a comfortable indoor temperature. Therefore, the study presented in this paper focuses on an experimental investigation of the specific heat capacity and thermal conductivity of hemp shive mixed with PCMs. Industrially manufactured organic PCM-S50 received from MikroCaps Ltd. (Slovenia) has been used to further enhance respective properties of the product samples. The experimental boards were made from hemp shive by directly mixing 5% encapsulate PCMs into the mass. Cold pressing was used to manufacture the boards with Kleiberit urea formaldehyde resin glue as a binding agent. The experimental boards were made as 25 mm thick single-layer parts with a density of 300 ± 20 kg/m³, which qualify them as low-density boards. By adding nanocapsules during the board manufacturing process, the heat capacity is increased by 62%. Based on the great potential of using latent heat, it becomes a possible solution for the development of new technologies related to the automatic regulation of an indoor microclimate.

Thermal insulation bio-composites made of plant origin by-products as bio-aggregates are one of the ways to decrease the impact of the building and construction sector on CO₂ emissions. In this study, three bio-aggregates were analysed for their potential use in the production of bio-composites with potato starch binder. Technologically important properties, such as particle size, shape and compacted bulk density, as well as properties of the resulting bio-composites were identified. The main characteristics of the aggregates are relatively similar: density of 80–100 kg/m³, thermal conductivity of 0.042–0.045 W/m∙K, specific heat capacity of 1240–1330 J/g∙K, kinetic water absorption from 456–584%. This leads to similar basic properties of the produced bio-composites: density around 200 kg/m³, thermal conductivity 0.053–0.062 W/m∙K, specific heat capacity 1250–1450 J/kg∙K, with a difference in compressive strength ranging from 0.2 to 0.8 MPa. Created starch binder and agricultural by-product filler materials could be used in the production of boards where strength is required, for example, envelope and wind barrier boards, and thermal insulation boards under floors.

The sustainability of the climate is a global problem that requires the involvement of all levels of public governance and the private sector. Energy issues play a crucial role in the Green Deal (GD), and many of these issues are being addressed at the local government (LG) level. The division of competences within the framework of the GD among the European Union (EU), national governments, LGs, and the private sector has not been sufficiently discussed. Existing studies often neglect the specific role of LGs. The aim of this study was to evaluate the extent to which the role of LGs aligns with the core principles of public governance, namely sustainability, solidarity, subsidiarity, and proportionality. The novelty of this study’s methodology lies in the comprehensive and integrated application of all four principles to assess the distribution of competences necessary to achieve global goals. The conclusion of the study demonstrates that, although the functionality and competences of LGs generally comply with these principles, the role of LGs as consultants to and co-legislators with national and EU authorities should be further discussed and expanded. Overall, this study highlights the importance of strengthening the role of LGs as valuable contributors to the governance process.