Theoretical bases of work of heat flow meters for diagnostics of technological processes

Abstract

The urgent tasks of developing large-scale technical systems, such as the heat networks of modern cities, are related to the need to improve the efficiency of their work by creating and implementing new methods and protection. The development and creation of heat flow devices will increase the service life of pipelines and reduce losses when delivering heat to the consumer. A mathematical model for determining the temperature and energy characteristics of thermoelectric converters is developed. In this case, we consider the conversion of thermal energy into electrical energy, since these converters are in great demand in many branches of science and technology. Consideration of a complex model of a multilayer instrument sensitive element can be replaced by considering a simpler model of a homogeneous sensitive element of the corresponding shape. This simplification makes it possible to obtain working formulas for determining the energy parameters of radiation from consideration of the temperature field of the sensitive element. In the paper, solutions are obtained for the heat conduction equation for various heating parameters and an analysis is made of the resulting error in measuring the energy parameters of radiation due to the nonequivalence of thermal losses. The obtained data formed the basis for the developed instruments for measuring the energy parameters of the technological process.