Abstract
The object of the study is rock masses with underground structures located in regions with a harsh climate. The subject of the study is the temperature in the rock mass in natural conditions and in the area where the structure is located, as well as the parameters of the energy efficiency of the underground facility. The purpose of the study is to determine the effect of thermal insulation and deepening of a structure from the surface on achieving the energy efficiency of underground facilities in regions with harsh climatic conditions. The tasks are to determine the temperature fields in the rocks of the northern regions and the rock temperature in the massif adjacent to the structure, to determine the loss of thermal energy with various technical characteristics of the underground structure. The method for determining the temperature fields in the rock massif and the loss of thermal energy by the structure is based on solving the non-stationary problem of heat transfer. The temperature fields are determined using the LIRA software package. The nature of temperature fluctuations of the rock layers closest to the surface in the conditions of the northern regions is considered. Temperature fluctuations on the contour of an underground structure are investigated. An assessment of the loss of thermal energy by an underground structure is being carried out. The influence of thermal insulation and deepening of the structure on its energy efficiency is determined. The field of application of the results of the study is related to the assessment of the energy loss of such underground structures as tunnels, refrigerators, parking lots, warehouses and other facilities. As a result of the research, it has been found that the rational use of underground space to the greatest extent depends on the quality of the thermal insulation of the object. A significant reduction in the loss of thermal energy by an underground structure is achieved with the simultaneous implementation of such measures as the use of thermal insulation and deepening of the object
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