Abstract
In order to maintain the temperature in a given mode in both residential and industrial premises it is necessary to establish the operation of a certain amount of equipment that will serve to receive, transfer and transmit the required amount of heat. The aggregate of such equipment is a heating system. From the correct choice of the device of such a system depends, as well as the efficiency of the devices, so the solution of energy-saving issues. Among multi-storey buildings, most of the buildings are connected to the centralized heat supply. The peculiarities of the thermal regime of buildings are taken into account at the design level, and heating systems must necessarily provide air parameters justified by regulations. A number of requirements are imposed on heating systems: sanitary-hygienic, economic, construction, installation and operational. Most often water is used as a heat carrier. The use of water heating has a number of advantages, including hygiene, reliability, quietness, simplicity and ease of operation. The materials from which radiators are made can be different: cast iron, steel, aluminum. It is also possible to use bimetallic radiators. The choice of a particular type of radiator is determined in each case, depending on the conditions. When calculating the heat transfer processes in the radiator, the heat transfer process from the hot water in the radiator to the heated air is calculated.