Yedilkhan  Amirgaliyev, Ainur  Kozbakova, Nazbek  Kataev, Omirlan  Auelbekov, Didar  Yedilkhan, Aliya  Kalizhanova, Murat  Kunelbayev, 
    Research and Calculation of the Coefficient for the Solar Radiation of a
Flat Solar Collector,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 20,
    2019,
    Pages 7685-7692,
    ISSN 1816-949x,
    jeasci.2019.7685.7692,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.7685.7692)
    Abstract: This study deals with the study and the calculation of the coefficient of capture of solar radiation of
a flat solar collector. The basic equations describing the energy balance of the flat solar collector. It is known
that the surface of the transparent insulation the heat coming down: the flow of direct sunlight, the flow of the
Sun’s rays reflected from the mirrors and the flow of the scattered (diffuse) radiation from the sky, from the
surroundings which are absorbed by the individual layers of the heating surface. Compiled energy balance
equation, a single layer of the heat element. Because compiled equation for steady state surface density of
captured radiation is equal to the surface density of the heat flow withdrawn from the working medium of the
receiver element (coolant) or the average temperature of the latter does not differ from the ambient temperature.
In the above case, capture ratio is plant efficiency. The equation shows that the surface density of the heat
flow, coolant withdrawn from the receiver can be calculated as the surface density of the trapped radiation
minus the conditional heat loss and efficient heat consumption for heating system. Flow captured radiation is
not dependent on the heat capacity of the system. Through analysis and optimization of the solar energy
collector carried on a flat cavity with a modified receiver with regard to the content of incident solar radiation.
    Keywords: solar radiation;thermal resistance;Flat solar collector;thermal losses;exergy;optimization