Search academic texts

Registration Number

0213U004392, 0113U001889 , R & D reports

Title

Investigation of thermophysical and hydrodynamic processes in the workspace of boiler and determining possible locations of alpha - probe

Head

Babak Vitaliy Pavlovych,

Registration Date

10-12-2013

Organization

Institute of Engineering Thermophysics of the Ukrainian National Academy of Sciences

Description

Object of research - the process of combustion of fossil fuels in boilers of low power (up to 3.5 MW). Purpose - to study thermal and hydrodynamic processes in the working space of the boiler to determine possible locations for alpha - probe. Our method is based on computer modeling of thermal and hydrodynamic processes in the working space of the boiler on the example of boiler NIISTU -5, with the definition of the possible location of alpha - probe and the creation of devices for monitoring of residual oxygen in the flue gas. Scientific significance of the study is the use of the method of measurement of residual oxygen in the flue gas for further applying in feedback control systems of gas-air ratio based on alpha - probe. Application of these methods is justified; the novelty is protected by patent application. A full parametric study of workspace of boiler NIISTU -5 is performed using a modified application of package Phoenics. Given the results of mathematical modeling of the combustion process in the boiler furnace (obtained velocity, temperature and concentration fields in the working space of the boiler) and based on practical experience, the location of the alpha - probe is selected. Stationary alpha indicator for measuring the excess oxygen in the flue gas is created on the results of scientific and experimental research. Measuring range of the parameter alpha is 0.68 ... 1.32, the relative error - 3%, an indication of measurement results - LED, the total mass of the device - <1.2 kg. The results can be used at the enterprises Teplokommunenergo, Ministry of Regional Development and Housing of Ukraine, where more than 6000 boilers NIISTU- 5 need to be replaced and upgraded as well as similar boilers of other manufacturers.

Product Description

popup.authors

Бабак В.П.
Запорожець А.О.
Назаренко О.О.