Numerical solution of the problem of heat transfer in the boundary layers of transparent gas wall, exposed on the opposite side of radiant-convective heating. The energy dissipation due to viscosity is negligible, the wall is thermally thin, and the physical properties of the medium do not depend on temperature. The aim of this work - finding the local heat transfer coefficients (Nusselt number) needed for the analysis of heat exchangers. When solving the problem of nonlinear transfer functions linearizing method is used, based on which numerical scheme for computer calculations was constructed. The intensity of the local heat transfer in the boundary layer is determined by the number Kx = Nux / Nux0, where the value Nusselt numbers refer to the conditions under consideration of the problem of heat exchange (Nux) and constant surface temperature (Nux0). From a physical point of view, non-dimensional parameter Kx is a measure of the intensity of heat transfer in the boundary layer on a nonisothermal surface compared to heat transfer when the wall temperature everywhere the same. The analysis of this research showed that in radiative-convective heating number Kx on the front edge of the plate takes the largest value of Kx ≈ 1,37 corresponding to a constant heat flux on the wall. It is also shown that the relative temperature of the incoming flow has a significant impact on the value of Kx. The effect of this setting is especially evident in the processes when dominated by the effect of radiation and related to the nonlinearity of the transfer processes. The analysis revealed the influence of basic parameters of heat transfer on the development of transport processes in the boundary layer by heating radiation and convection simultaneously.

Keywords: Boundary layer, convection, radiation, radiation-convection heating, high temperature gas invironment, linearizing function

The article discusses the methodology of assessing the technical condition of the regenerative air heater RVP-54 on power boilers Naberezhnye Chelny CHP on the basis of the results of the monitoring of the thermal efficiency. In article the algorithm of monitoring and evaluation of the thermal efficiency of regenerative air heater, allows in real time to compare actual performance with previous values and to eliminate the revealed violations.

Keywords: Naberezhnye Chelny CHP, energy boiler, regenerative air heater RVP-54, technical condition assessment, commissioning and configuration, thermal calculation, temperature difference, heating surface, thermal efficiency, heat losses

The article presents the results of research of hydrodynamics of flow of the gas-suspension of conversion lime carbonate in a tube-dryer. For the first time equations for determining the speed and concentration of lime carbonate along the length of the tube-dryer at different air velocities and feed concentrations are received. The research results can be used to design pipes-dryers for large-tonnage productions of conversion of calcium carbonate. Experiments of research of hydrodynamics of the gas-suspension of conversion lime carbonate were carried out on the tube-dryer with an internal diameter to 0.069 m, length 4.8 m. Along the axis of the pipe on the rod vertically mounted discs, the first disc below the auger to 0.6 m, the second – above the auger to 0.7 m and further 1 m, total 5 disks.

Keywords: conversion lime carbonate, drying, tube-dryer

The article presents the results of researches of heat and mass transfer in the flow of the gas-suspension of conversion lime carbonate in a tube-dryer. For the first time equations for determining the influence of initial air temperature at moisture content in a tube-dryer, the influence of air temperature on heat rate are received. The research results can be used to design pipes-dryers for large-tonnage productions of conversion of calcium carbonate. Experiments of researches of heat and mass transfer in the flow of the gas-suspension of conversion lime carbonate were carried out on the tube-dryer with an internal diameter to 0.069 m, length 4.8 m. Along the axis of the pipe on the rod vertically mounted discs, the first disc below the auger to 0.6 m, the second – above the auger to 0.7 m and further 1 m, total 5 disks.

Keywords: conversion lime carbonate, drying, tube-dryer

In this study, the task of optimization of the hybrid system of immersion cooling processor supercomputer with resistance spot cooling and dry zones. by numerical simulation and experimental study of heat transfer processes in the test object. The article presents the results of numerical simulation and experimental study of heat transfer in a heat exchanger submerged cooling system processors. We investigated the numerical model of heat transfer process in the processor-heat exchanger system. As a result, obtained according to the thermal resistance of the system processor and the heat exchanger of the heat transfer coefficient and the number of turbulent flow Reynolds.

Keywords: processor, heat flow, thermal resistance, Laplace equation, turbulent flow, the Reynolds number, heat, immersion cooling, immersion cooling system

In this study, the task of optimizing the supercomputer CPU cooling system with a heat pump in the reverse Stirling cycle through numerical modeling of heat transfer processes in the test object The article presents numerical modeling of heat transfer processes in the cooling system of the supercomputer processors with a heat pump on the return cycle. We investigated the numerical model of heat transfer process in the system of CPU "cold" cylinder and heat pump system "hot cylinder" - coolant. As a result, obtained according to the thermal resistance of the system of CPU "cold" cylinder and heat pump system "hot cylinder" - coolant depending on the coefficient of heat transfer and on the value of COP of the heat pump

Keywords: processor, heat flow, the thermal resistance of the Laplace equation, heat pump, heat exchange, reverse Stirling cycle cooling system

We consider the problems of complex structure teplotehnologicheskih complexes manufactures pulp and paper industry. Proposed and carried out structural analysis teplotehnologicheskih paper production complex in pulp and paper mills. Use graph theory and matrix analysis. Apply the authors developed a universal application in C # for the analysis of complex structured system of industrial circuits, power complexes. We obtained the results of the work program for the production of paper teplotehnologicheskoj scheme. Revealed all the circuits with the scheme. Identified torn flows for sequential calculation scheme without iterations. structural analysis program can be recommended for use and other industrial multi-loop circuit industry.

Keywords: structural analysis, feedback, teplotehnologicheskih scheme, industry, software, iteration

The article describes the conditions of use of heat pumps in the Russian industry. It proposed to introduce for the food industry, in particular for milk production, teplonanosnaya installation. Heat pump system allows to cover the heat load on the heating, ventilation and hot water supply of a specific milk production due to utilization of energy in the form of relief condensate produced in industrial drying processes. It is shown that the proposed plant will allow useful secondary steam and condensate will reduce fuel costs, simplify circuit heat consumption, reduce the cost of production of thermal energy, reduce operating costs for maintenance of heating systems, heat loss and reduce emissions into the environment.

Keywords: energy efficiency, milk production, relief energy, condensate recovery, heat pump system

This paper proposes a method of determining harmfulness of pollutants resulting from the operation of boiler equipment, discusses how the use of heat energy waste resulting from the operation of thermal plants boilers, as heating of the coolant. And is determined by the energy potential of waste heat, calculate the concentration of pollutants in the atmosphere and provide a method of determining the calculated fuel consumption volume of flue gases, amount of contaminants emitted into the atmosphere during operation of boiler enterprises.

Keywords: resources, energy, coolant, contaminants, heat capacity, energy saving

Low heat transfer coefficient per unit area is main disadvantage of immersion cooling system. In the theoretical part of the study the main issue was to evaluate the influence of various factors on the convective heat transfer between the solid-liquid interface. The result of this part of study was conclusion that the type of fluid flow in the area of heat transfer is key factor of increase heat convective heat transfer of thermal contact. The Reynolds number is main characteristic of turbulence of fluid flow. Therefore in the experimental part describes study of the effect of the degree of turbulence of the fluid flow at the place of the thermal contact on thermal resistance of immersion cooling system. The design of experimental setup and its main parts is describe further. The result of the experiment is graphic of experimental curve of the thermal resistance of immersion cooling system from the Reynolds number of fluid flow of thermal contact between the solid-liquid interface. The study showed the possibility of local reduction of the thermal resistance of immersion cooling systems to maintain the quality of the thermal management of computing elements that emit significant heat. The results of the study is define the ranges of values of the Reynolds number of cooling system that allows the technical realization at the current dimensions of packages and sizes of microchips sockets.

Keywords: microchip, heat flow, cooling system, Laplace's equation, turbulent flow, Reynolds number, heat transfer, thermal resistance, electrothermal analogy, thermal protection

The main maintenance of a diversification of production as activity of subjects of managing is considered. being shown in purchase of the operating enterprises, the organizations of the new enterprises, redistribution of investments in interests of the organization and development of new production on available floor spaces. The most important organizational economic targets of a diversification of management are presented by innovative activity of the industrial enterprise.

Keywords: heat transfer, coefficient of heat transfer, thermal conductivity, similarity criteria, electric analog, vertical pipe, fluid, air, hot-water boiler

The model of mobile system of diagnostics and automatic regulation of multiphase environments flow regimes is considered. The analysis of existing methods for determining the thermal parameters of a mixture of several gases and liquids in the presence of particulate matter in the stream showed the relevance of the small size mobile systems, in which the measurement is made with modern sensors for pressure, temperature, gas content. Control signals state multiphase flow formed in the controller based on the values of the complexes Kutateladze - Sorokin, Baker. Specific designer elements of diagnostics and regulation system development of multiphase environments flow regimes is offered. The directions for further research in relation to specific multiphase systems are planned.

Keywords: mobile system, multiphase flow, diagnostics, regulation

This article is devoted to the issues related to energy saving in extraction of petroleum with high viscosity and bitumen. The author identifies the shortcomings of existing methods of thermal insulation of steam lines. The article contains the calculation of the specific heat loss of steam pipelines with polyurethane insulation. The calculation is considering an influence of the thermal destruction on the coefficient of transcalency of insulation.

Keywords: steam pipe, heat losses, polyurethane insulation, mineral wool, thermal destruction, petroleum-producing

To escape from subjectivity in the analysis of thermal images during the thermal study of energy facilities proposed to use thermographic information functions . The method is implemented by means of mathematical analysis environment MathCad. As a criterion for assessing the technical condition of power equipment use rate of defects.

Keywords: non-destructive testing , diagnostics, thermogram method of analysis , the transformer , the ratio of defects

Considered Thermal calculation of light frame structures , shows the effect of air filtration in the temperature distribution on the inner surface of the enclosure .

Keywords: Breathable thermal Field & light building envelope highly porous heaters humidity materials