ASSESSMENT OF THE TECHNICAL AND ECONOMIC EFFICIENCY OF AUTONOMOUS SOLAR GREENHOUSES WITH EVEN-SPAN STRUCTURES
Keywords:
autonomous greenhouse, solar photovoltaic installation, heat pump, energy efficiencyAbstract
Annotation. Introduction. The assessment of the possibilities of using alternative energy sources in the energy supply of autonomous greenhouses, greenhouse development trends and the use of a combined solar-heat pump, which allows to increase energy efficiency and ensure the continuity of greenhouse operation in changing climatic conditions, is of great importance in the world and Uzbekistan.
Methods and materials. A technological scheme of a combined power plant is proposed. The dynamics of temperature changes in the Kashkadarya regions was obtained on the basis of GIS technologies. The “net discount” method was used to assess the economic efficiency of autonomous solar cookers with two inclined structures.
Results. Due to the use of heat pumps in greenhouses with a useful area of 50 m2 located in the Kashkadarya region, 127.6 million Soums and the device payback period is estimated at 5 years. At the same time, the economic profitability was about 20.79% per year.
Conclusion. With the help of the proposed combined power plant, Autonomous greenhouses are provided with uninterrupted heat and electricity, in addition, agricultural products are drained. It is also based on the fact that solar photovoltaic devices can increase energy efficiency by 20-30% by removing dust and protecting against overheating in changing climatic conditions.
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References
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