Features of the Heat Engineering Calculation of the Enclosing Structures Industrial Buildings Operated in a Variable Thermal Conditions

In recent years' special attention has been paid to energy conservation. The need to reduce the consumption of mineral raw materials and fossil organic fuel is primarily associated with a reduction their reserves and, consequently, a constant increase in the cost. Therefore, a very actual task is to reduce the energy costs for heating and ventilation of industrial enterprises. The use of on duty heating during the non-working period can significantly increase the energy efficiency of an industrial building. On the basis the thermal regime of an industrial building, considered in the article, is shown the need to develop an engineering method for calculating the process of non-stationary heat transfer in buildings operated with a stand-by heating mode. This article presents the method of heat engineering calculation of building enclosing structures used in buildings with variable power of the heating system, which allows to determine the minimum allowable thickness of insulation from the condition of limiting the heating time of the outer wall. An example of the design calculation of the wall sandwich panel an industrial building is considered. An assessment of the specific energy consumption for heating external walls was made. A study conducted by the authors, allows to determine the range of thickness the enclosing structures, operated in conditions of a variable thermal regime. (paper)