Improving the Efficiency of the Power Supply to Agricultural Facilities by Means of Roof-Top Photovoltaic Installations
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Improving the Efficiency of the Power Supply to Agricultural Facilities by Means of Roof-Top Photovoltaic Installations Yu. V. Dausa, *, V. V. Kharchenkob, I. V. Yudaeva, D. A. Desyatnichenkoa, and G. V. Stepanchuka aAzov–Black
Sea Engineering Institute, Don State Agrarian University, Zernograd, Rostov oblast, 347740 Russia bFederal Scientific Agroengineering Center VIM, Moscow, Russia *e-mail: [email protected] Received July 5, 2019; revised December 14, 2019; accepted February 10, 2020
Abstract—The purpose of the study is to substantiate the parameters and operation mode of the photovoltaic installation as part of the power supply system of real agricultural enterprise in order to reduce the cost of paying for electric energy. The object of research is the system of intra-workshop lighting of two departments of the baking mill in the Rostov oblast. Placing photovoltaic modules on the inclined part of the industrial building’s roof of the mill compartments, having an inclination angle of 10° relative to the horizon measuring 39 × 10 m and oriented by the wide side strictly to the South. Three options for the layout of the solar power installation with photovoltaic panels were considered: option 1– maximum power supply to the consumer from the solar power plant in the summer (30 modules); option 2–generation mode without the use of electric energy storage devices; option 3–14 modules and the presence of an electric energy storage system. Specific capital investments in the third option increased by 40% in comparison with the second option, although the installed capacity of the installation increased only by 27.2%. The increase in the power of solar installation to 5.4 kW requires specific costs 2.5 times greater than for the second option. The calculation results allow us to highlight the lowest value of the prime cost of generated electric energy, obtained for the second option, which is 4.33 rubles/(kW h). Thus, the use of photovoltaic installations on industrial building roofs of agricultural facilities makes it possible to reduce the payment for each kW h of consumed electrical energy almost by 2.5 times. Keywords: spatial orientation, solar radiation intensity, layout of photovoltaic modules, graphs of electric energy generation and consumption, prime cost of generated electric energy DOI: 10.3103/S0003701X20030032
INTRODUCTION The conversion of energy from the Sun will almost completely satisfy the human need for energy for many years. At the same time, solar energy is “clean” and does not adversely affect the environment [1]. Given the reduction in the cost of production of photovoltaic modules and other plant components in the next decade, photovoltaics will seriously compete with the oil and gas industry [2, 3]. Solar power plants of any capacity, as a source of electrical energy, can be used in industry, agriculture, the household and communal sector, construction, in autonomous video surveillance systems, lighting, the space industry, etc. [4, 5]. Solar power facilities of various
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