Комп'ютерне математичне моделювання процесів гідродинаміки і теплообміну системи мікроклімату у промисловій теплиці
Abstract
COMPUTER Mathematical modeling of hydrodynamics and heat transfer for the system microclimate in industrial greenhouses
B. Kuliak, V. Trokhanyak
The purpose of research - conducting computer mathematical modeling of fluid flow and heat transfer occurring in the interaction of the heating and ventilation system for optimum temperature and humidity conditions.
Materials and methods of research. Geometry industrial greenhouses built according to the real size, so a fairly large number of elements and facets. Considering this aspect of the decision to count only a quarter of the greenhouse 3D, which is symmetrical to the other three, which made it possible to reduce the time a computer calculation.
The geometry of the greenhouse openings are provided for ventilation systems and pipes with hot water for heating.
The input data of the research object. The water temperature in the heating system of the tent is 95..70 °C at a heating option from its own boiler. The inside temperature of the greenhouse accepted +15 °C. outside air temperature taking as the average temperature of the coldest month of operation -20 °C (for winter greenhouses). Relative humidity 60% is taken into the greenhouse. For heating the tent used steel smooth tube diameter of 32 mm and a total surface area of 657.9 m2. Fences greenhouses made of a single layer of polycarbonate, 4 mm thick. The width and length of the greenhouse section is 6.4 m and 75 m, respectively, and height - 4.5 m.
As a result of the numerical simulation of fluid flow and heat transfer processes occurring in the interaction of heating and ventilation system, the analysis of the temperature distribution, heat radiation and air flow speeds in the production section of the greenhouse.
Сonclusions
1. Using the software package ANSYS Fluent held computer mathematical modeling of fluid flow and heat transfer occurring inside the greenhouse space, the interaction of the heating and ventilation system.
2. The analysis of the velocity vectors, temperature fields and radiation heat fluxes obtained by numerical simulation.
3. The necessary data to assess and create the optimal temperature and humidity conditions in the production departments of industrial greenhouses.
References
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