![]() ![]() The EU regulations on energy saving have been implemented in all Member States with the adoption of the North-European superinsulated model which, focusing on winter heating consumption, has led even in warm countries to the construction of buildings not much related to their climatic context and often designed with disregard for the occupants’ needs. New buildings are subjected to increasingly stringent standards of insulation, regardless the specific climate. ![]() Hence, thick insulation layers placed adjacent to the mass inevitably modify this dynamic interaction. The layers relative position and materials adopted influence the time-dependent transmission. If the temperature remains constant, the mass does not show its dynamic behavior, while for highly variable temperatures it strongly interacts with the environment. 1.2 Background 1.2.1 The optimal envelope identification is still a challengeĪ thermal mass exposed to the external and internal environments responds in a both immediate and time-dependent way, having a certain capacity for heat storage. It outlines the book purposes and announces the main innovations and utilities. This chapter explains these new open issues on the recently introduced superinsulated envelopes also reporting items of previous research in the area. Optimal envelope thermal comfort energy saving environmental impact global costs experimental study dynamic envelope solutions heat transfer across the envelope selection of wall layers EN ISO 13786:2007 1.1 Introduction On the other hand, the recent literature on sustainability highlights that, considering economic and environmental aspects, lightweight solutions should be preferred. Forty years of researches have demonstrated that thermal inertia is one of the most important parameters to improve thermal comfort as well as to reduce cooling energy demands especially in particularly dynamic external and internal (e.g., used intermittently) environments. These new envelopes act as thermal barriers causing summer overheating and attributing the regulation of indoor comfort to conditioning systems. For many years, improving the thermal performance of envelopes meant adopting a thick insulation layer, regardless its position or the presence of mass. The heating and cooling load of a building is mostly due to the heat transfer across its envelope and thus selecting an appropriate envelope is one of the most effective ways to achieve energy saving. High Thermal Resistance Versus High Thermal Capacity Integrated evaluations between various aspects such as comfort, energy saving, and sustainability.Evaluation of solutions sustainability through the quantification of environmental and economic impacts with LCA analysis including global cost comparison between the different scenarios.Analytical simulations in dynamic conditions to extend the boundary conditions to other climates and usage profiles and to consider alternative insulation strategies. ![]()
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