Calculation of Temperature of Routine Water Cooled in Irrigated Layers

Abstract

The article describes the developed mathematical model, algorithm and program for calculating the process of cooling the water leaving the evaporative cooler and the final temperature of humid air. The compilation of a mathematical model is based on the analysis of literature data. Practically at all industrial enterprises, technological equipment is cooled by means of circulating water supply systems equipped with evaporative coolers. The article made a choice of a cooling system for air conditioning systems of residential premises. The developed basic design scheme of the evaporative water and air cooler with the irrigated layer is presented, as well as the estimated thermal and material balance. One of the main elements of these devices is a heat-mass transfer nozzle - sprinkler. This article presents the results of mathematical modeling of processes occurring in the volume of the sprinkler evaporator chamber, Raschig rings composed of vertical polymeric materials. Expressions are obtained for determining the values of air temperature based on the calculation of thermal modeling of the process of cooling circulating water in evaporative coolers of the type in question.

Mathematical modeling of heat and mass exchange processes in the evaporative cooler

“…-the surface area of the cross-section irrigation chamber; -the thickness of irrigated layer. Substituting (2) -( 5) into (1), we obtain [8] , ( 6) where ( 7)…”

“…In order to carry out this, the conditions of the established thermodynamic equilibrium between the obvious and latent heat will be utilized. , (8) which were proposed in [8]. In (8) is the partial pressure of water vapor over the surface of the evaporated water, which has the saturation temperature, that is, the wet thermometer.…”

“…, (8) which were proposed in [8]. In (8) is the partial pressure of water vapor over the surface of the evaporated water, which has the saturation temperature, that is, the wet thermometer. Determine the value of from (8) (…”

“…The following regulations apply to the materials of the irrigation layer in water and air coolers of this type: -a continuous surface with the same filling capacity with the largest sweep; -for energy supply, the most complete wetting of the surface or material with water at the lowest cost; -evaporative cooling indicators with high efficiency and low aerodynamic resistance; -material resistance to corrosion, weathering, the formation of harmful smells; -resistance to bacterial infections; -cheap costs and a large supply of raw resources [8]. -irrigation water temperature ( -means at the inlet and -at the outlet of the irrigation chamber) [8,9]. The irrigated layers are filled with synthetic fibers, wood fibers and shavings, fiberglass, palm tree bark fibers, metal wires, porous plastic plates, and thin metal sheets.…”

“…The first necessary condition in this case is the definition of the thermodynamic system's boundaries in the form of a balance surface (Fig. 2), which allows to estimate the direction and dimension of various flows [8,9]. If the evaporative cooler of the recycled water is considered as a thermodynamic system, when the mass flow crosses its balance surface, i.e.…”