ENERGY CHARACTERISTICS OF THE PROCESS OF HYDRODYNAMIC CONDITIONING OF MINE AIR

Abstract

The results of the analytical study of the energy characteristics of the process of hydrodynamic conditioning of mine air are presented, which is especially important for the development of autonomous means of ensuring labour protection standards for temperature and dust in the working areas of deep coal mines. Purpose. The aim is to substantiate and analytically determine the main energy characteristics of the process of hydrodynamic conditioning of mine air for the development of functional modules of mine air conditioners with variable dimensions and capacities that meet the specific conditions of work areas in deep coal mines. Methods. The general research methodology is based on a systematic approach to the analysis of hydraulic and thermodynamic processes, which includes a set of analytical studies of the mixture of air with water droplets with justification and development of a mathematical model of the system “air – dust – drop” as a body of variable mass moving in working space. air conditioning, analysis of experimental data by methods of mathematical statistics and the theory of stochastic processes, as well as generalizations on defining patterns of determining the main energy characteristics of hydrodynamic conditioning of mine air. Results. The equation of the energy state of the active component of the working fluid flow of a mixture of air and water droplets is analytically determined; equation of thermodynamics of the element of the working mixture; differential equation of thermodynamic process in hydrodynamic air conditioner; energy characteristics of the relative exchange of the working fluid, conditioning and the environment; equation of the laws of change of pressure and temperature of the working fluid in the element of the hydrodynamic air conditioner. Scientific novelty. For the first time, the thermodynamic equation of the state of the working fluid element of a mixture of heat-potential air and drip water, as well as the equation of change of pressure and temperature of the working fluid in the hydrodynamic air conditioner element were analytically determined. Practical significance. The practical significance of the research results is that on the basis of energy characteristics it becomes possible to calculate the required initial temperature of water (defined for 10-20oC), which is fed into the hydrodynamic air conditioner and initial air temperature (for 30-45oC), which is a technical condition for development and operation of a hydrodynamic air conditioner for a specific local working zone of a coal mine mine in the practical provision of cooling of mine air to a sanitary temperature of 26oС.