Safyants A. Improving the heat exchange processes in the heat generation in low-capacity boilers, its transmission and consumption

Relevant scientific and technical tasks of theoretical study and practical implementation of improvement in thermal condition of the equipment for the heat generation, transmission and consumption to increase the energy efficiency of heat supply and heat consumption proc-esses have been solved. A set of geometric and operational characteristics of fire-tube low-capacity boilers affecting the heat generation process has been defined, which enabled to im-prove the method for calculating the heat transfer coefficient from gases to heat transfer agent in the tube bundle. In addition, gas burner with the principle of artificial multi-jet gas flow turbulization in mixing with air has been improved in view of the above. Computer model for calculation of performance of IHP with automatic control of heat transfer agent temperature, consumption rate and supply time in open heating system has been developed that enabled to more accurately calculate actual and normative heat loss in residential area buildings. Func-tional dependencies (heat transfer agent consumption rate for heating and water temperature gradient in the IHP primary and secondary circuits from water temperature t1 in feed line: IHP secondary circuit inlet and outlet water temperature and heat losses in the feed and return pipe from ambient temperature tп) obtained using it enabled to calculate the parameters of the most preferred mode of IHP operation to ensure specified heat transfer agent parameters in accor-dance with the existing rules and regulations of heating and hot water supply with the boiler house switch from a closed to an open heating system. Dependencies of the convective flow structure in a room on its size and heat source location for various heating schemes have been established based on the joint use of the general heat transfer calculations and the results of thermal state instrumental measurement data processing. It has been proved theoretically and confirmed practically that the use of dynamic updating of heat supply facility instrumental and documentary audit databases followed by the integration of the instrumental measure-ments and mathematical modeling results enables to improve the accuracy of calculations of actual energy consumption by 7-10%.