A universal, multifunctional system of environmental diagnostics of heat engines and boiler plants has been created, which allows one to determine indicators characterizing the chemical and physical effect of these objects on the environment: concentrations, mass, specific and average operational emissions of pollutants, noise, thermal pollution, vibration. This measuring system consists of instrumental, testing, demonstration and laboratory modules, which allows you to use it as a diagnostic tool, training and test bench and laboratory; as well as apply it in various fields: transport, energy, environmental and educational fields. The diagnostic system implements methods for monitoring and improving the accuracy of measurements of average operating emissions of pollutants: method for determining the resulting measurement errors of the average operational emissions of gaseous pollutants and particulate matter – GAS and РT indicators, which allows you to evaluate the impact on the data of the value of the errors of the measuring equipment of the diagnostic system; a method for increasing the accuracy of measurements of the normalized РT index by taking into account the methodological error of measurements of a given value due to the influence of the temperature of the sample in the tunnel on the measured emission of particulate matter - δРТt. Experimental studies of the diagnostic system and methods for increasing its accuracyon full-scale objects were carried out: diesel engines: tractor 4CHN12/14 tractor D65M, diesel locomotive diesel engine DEL-01 and boiler units: gas - DKVR-20/13 and AOGV-100E, solid fuel - KCHM-2M-4. Transport diesels were tested according to the cycles established by the UNECE Regulations R-49, R-96 and the international standard ISO-8178. As a result of tests of these engines, the coefficients KРi, KMgasi and KMрmi were determined, which are used to assess the accuracy of measurements of GAS and РT indicators, the resulting measurement errors of these values were investigated and the range of variation of the methodical error δРТt was determined.

A description is given of an experimental sample of a universal system for the environmental diagnosis of heat engines and boiler installations, which was developed at the Department of Environmental Engineering of the O.M. Beketov National University of Urban Economy in Kharkiv. The properties of this system are: multi-functionality, compactness, mobility, ease of operation, a high degree of automation, informative results, ability to solve both research and training tasks. The structure, composition and functionality of the main modules of this system are considered: 1) measuring, which contains microtunnels МКТ-2, instruments and equipment for direct determination of indicators of chemical and physical pollution of the environment; 2) testing and demonstration, which consists of: installations for research of aerodynamic processes in exhaust systems of engines and boiler chimneys, laboratory transformer rack for mounting various test benches, a multimedia complex equipped with a tablet PC and an SMART information panel with a diameter of 43 " to demonstrate the operation of devices, equipment, programs, research results, etc.; 3) laboratory, which contains laboratory devices, equipment and consumables for the analysis of samples taken during environmental studies of natural objects. Normalized methods and techniques that allow to determine indicators characterizing chemical and physical pollution of the environment by heat engines and boiler installations are defined and systematized. Experimental testing of the created measuring system on full-scale objects: a gasoline engine of a passenger car - VAZ-21081 and automotive diesel engines - 4ЧН12 / 14, boilers with gas - DKVR-20/13 AOGV-100E and solid-fuel - КЧМ-2М-4 boilers. Tests confirmed the practical suitability of the measuring system.