DETERMINATION OF THE EFFICIENCY OF HEAT SUPPLY OF THE MULTIPURPOSE HOUSING BUILDING WITH ACCOUNTING OF INVERMALITY OF HEAT CONDUCT TO PREMISES AND UNCERTAINTY FIXTURES

Abstract

the refined method of calculation of heat supply efficiency of a multistory building with the account of uncontrolled alterations of the heating system and non-system warming is developed.

The generalized calculation scheme of the heating device is made, which corresponds to the generalized scheme of the discrete calculation of a complex multi-heat exchanger with a mixed flow. In this case, the dimensionless thermal performance of the heating device is calculated not by the empirical dependence, but on the created algorithm of discrete calculation. The system of equations additionally includes the connection between the calculated and actual thermal loads.

As a result, for each floor, the actual thermal performance of the heating device and the flow of circulating air through it are determined. With these parameters, the actual air temperature at the outlet from the heating device and inside the room, the temperature of the coolant at the outlet is determined. The starting data is the flow and temperature of the coolant at the inlet to the heating system from the temperature graph, the temperature of the outside air, the equivalent square meter of the heating device on each floor. The thermal performance of the entire system is defined as the sum of the performance of all devices.

The mathematical modeling of the partially insulated wall of the enclosing structure with the determination of the heat flow by solving the three-dimensional differential equation of heat conduction with the task of the boundary conditions of the II, III and IV genera and the distribution of the characteristics of the layer of building structures and insulation is carried out. As a result, an increase in the heat flow is calculated. In the future, the redistribution of internal temperature in the premises of the house and the thermal efficiency of the entire enclosure structure is calculated.

Summary of article. The use of developed techniques and algorithm complexes will help to more accurately calculate heating systems at the design stage, to determine the efficiency and over-consumption of thermal energy during operation and to reduce them, to develop recommendations for improving the provision of thermal energy for consumers.