Abstract. Buildings are the largest source of carbon emissions and energy consumption around the world. Currently, the construction sector focuses on energy efficient and carbon emission reduction technologies to reduce the effect of a green house and improve the environment. The energy aspects of buildings depend on the early design process. The energy consumed by the building can be reduced to 80% by optimizing the orientation, the shape of the building, the insulation and ventilation during the design and management of the facilities after the completion of the construction. The reductions of energy consumption are fundamental to the International Energy Agency (IEA) goal, which is to reduce global carbon emissions by 77% against the projected data for 2050 to achieve the stabilized CO2 level provided by the Intergovernmental Panel on Climate Change (IPCC). In this issue, research and development of energy-efficient technologies are important, which play a crucial role in reducing initial costs and increasing energy conservation. To do this, it is recommended to use simulation modeling of the queue management system, which has practical application for both large systems and for private systems.
This article analyzed the impact of the structural characteristics of old apartment buildings on actual energy consumption. The authors reviewed energy consumption in existing apartment buildings in Voronezh in order to determine the need for major repairs and energy efficiency. For this purpose, a comparative analysis of energy consumption in old apartment buildings and in new ones built in accordance with the current regulations was carried out. Three indicators of energy consumption were considered for analysis: total energy consumption by the end-user, heating of premises and electricity consumption depending on the year of construction of apartment buildings. The characteristics considered were used to quantify energy consumption (heating and power supply). Due to the results obtained, a statistical analysis of energy consumption in old apartment buildings and in new ones was carried out. It was noted that old apartment buildings consume more energy than those built at a late stage, in accordance with the current regulatory framework. The results can be useful in identifying priority elements of the building that will help to effectively reduce energy consumption during major repairs and classify existing residential buildings to build energy models.
Abstract.Using an integral mathematical model of a fire considering the assumptions typical of a starting stage of a fire, analytical dependencies were obtained for determining the time of reaching a critical value of the density of a smoke screen in a premises with a fire epicenter and adjoining premises. By means of analytical formulas for determining critical evacuation time intervals based on visibility loss, table values for different parameters that are included in the original equations were obtained. Simple engineering analytical solutions that describe the dynamics of smoke formation in premises in case of a fire when used in a certain combination are presented. The obtained dependencies allow one to identify the critical time of evacuation with no use of special PC software as well as to obtain original data without calculating an anti-smoke ventilation system.
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