НОРМАТИВНАЯ ПЛОТНОСТЬ ТЕПЛОВОГО ПОТОКА И ТЕПЛОВЫЕ ПОТЕРИ ЧЕРЕЗ ТЕПЛОИЗОЛИРУЕМУЮ ПОВЕРХНОСТЬ ДЛЯ МАГИСТРАЛЬНЫХ ТЕПЛОВЫХ СЕТЕЙ

Abstract

The study traces the development of a range of published standard documents for the thermal insulation of heat supply systems, which aim to provide the durability of the system. This article is dedicated to the research of the influence of average yearly temperature on heat losses in heating networks. The research is devoted to heating systems and deals with thermodynamics and heat supply. In the work, there are recommendations for the thermal calculation of heat losses in pipelines of heat supply systems. Relevance of this study is determined by the fact that it appeals to the neglected issue in the heat supply system. The quality of the thermal insulation constructions depends on the heat losses. Correctly designing and specifying an insulation system is much more important than just selecting a particular material. Reports the results of a comparative case study. Methods of thermal calculations of heat losses in the pipelines of heating networks based on the application of the estimation of heat flow density through the surface of thermal insulation construction. In this article there is the example of thermal calculation of heat losses in pipelines with polyurethane foam insulation. Principally concludes the following: a current standard document shows the total heat flow density for the heat supply system. There are cases, when the diameters of the supply and return pipelines are not the same, in one duct can be laid three or more pipelines, therefore, in this case is necessary to use the previous standard. The total heat flow density in the norms can be shared between the supply and return pipelines in the same proportions as in the previous regulations.