Study of a solar air heater with a heat exchanger – accumulator

Self Cite

The article examines the sources of solid waste generation, their impact on the environment and human health. The morphological composition of municipal solid waste (MSW) and the factors influencing the dynamics of their change were analyzed. Based on the results of the study, the physical and thermal parameters of solid waste- ρ, φ were determined and the elemental composition and heat of combustion of solid waste were analyzed. It was found that the physical properties of MSW and the morphological composition of MSW depend on the seasons and other conditions. An energy balance diagram for heliothermal processing of solid household waste with different morphological compositions in a solar device for thermal treatment of solid waste was calculated and it was found that the share of solar energy for thermal processing of solid household waste was 78%. As a result of the thermal processing of organic compounds, which formed the morphological composition of the MSW, it was found that it is possible to obtain alternative fuels and produce thermal energy and electricity in the traditional way.

Section: Methodsmentioning

confidence: 99%

Experimental study of heliothermal processing of municipal solid waste based on solar energy

Kodirov

Toshmamatov

Aliyarova

et al. 2022

Self Cite

“…A decrease in humidity leads to a sharp decrease in the yield of vegetables and a loss of their marketability. Excessive moisture leads to the production of watery high-quality vegetables and, as a rule, leads to the development of their diseases [6][7].…”

Section: Methodsmentioning

confidence: 99%

“…To achieve maximum efficiency of biogas formation, anaerobic processing requires certain temperature conditions and technological processes, preferably close to achieving the optimum process [6][7]. The current stage of agricultural construction is characterized by a tendency to expand the greenhouse economy and mobilize everyone, including technical means to increase the productivity of greenhouses.…”

Section: Introductionmentioning

confidence: 99%

“…The current stage of agricultural construction is characterized by a tendency to expand the greenhouse economy and mobilize everyone, including technical means to increase the productivity of greenhouses. This trend is aimed at solving the problem of providing the population with fresh vegetables in the required quantities throughout the year and, which is especially important in the cold period from October to May [7][8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mathematical modeling of greenhouse-livestock complex heated by solar and bioenergy sources

Ergashev

Fayziev

Tilavov

et al. 2022

The article develops a mathematical model of the heat supply system of the greenhouse complex, taking into account the free heat flow in the animals, solar energy, heat energy stored in heat accumulators and developed through the program MATLAB / Simulink. In the development of a mathematical model of the heat supply system of the greenhouse complex, a block diagram of the equation in the program MATLAB / Simulink was developed, without taking into account the change in air density and specific heat capacity with temperature. According to the graphic results obtained for the daily value of solar radiation 500 W/m2, outside air temperature, -6 °C in Karshi, the air temperature inside the greenhouse rises to 22 °C, water tank battery temperature to 13 °C, underground heat accumulator temperature to 17 °C. can be seen. while the amount of total solar radiation was 300 W/m2, this figure was found to be 14 °C, 9 °C, and 12 °C.

“…One of the most important issues is research aimed at increasing efficiency and developing new modern structures, as well as improving their heat calculation methods. At the same time, it is important for the heat supply system to accelerate the heat exchange processes by turbulizing the airflow and increasing the efficiency of solar air collectors based on an improved absorber design [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Improving the energy efficiency of a solar air heater with a heat exchanger – accumulator

Toshmamatov

Shomuratova

Mamedova

et al. 2022

The authors of the work presented developed solar air-heater with a spiral heat exchanger-accumulator based on their developed scheme. The article discusses a result of experimental studies, the high energy efficiency of a solar air-heater with a spiral heat exchanger-accumulator in the mode of medium heating of heat carriers in the natural and climatic conditions of Karshi. In July 2021, the maximum level of solar radiation was recorded for the entire experimental and research period. This article shows that the maximum air temperature rose to 78 °C due to the use of oil to collect heat in the SAH and that hot air was supplied to the consumer during the day. As a result of experimental studies, the main experimental designs and modes of operation of the solar air heater with a spiral heat exchanger-accumulator were substantiated.