SOLAR MODULE WITH COMPOUND PARABOLIC CONCENTRATOR INCLUDED IN STIRLING ENGINE Russian patent published in 2014 - IPC H02S10/00 H02S40/22 

FIELD: power industry.

SUBSTANCE: photoelectric module of solar concentrated emission relates to solar engineering and refers to creation of solar modules with photoelectric and thermal receptors and concentrators of solar emission in the form of paraboloids. The solar module with the compound parabolic concentrator with Stirling engine includes a cylindrical photoelectric receptor of Stirling engine, which is installed in a focal area with a cylindrical cooling device located below the compound parabolic concentrator; according to the invention, the concentrator is composite and made in the form of a rotation body with mirror inner reflection surface consisting of three zones a-b, b-c, c-d; with that, shape of reflecting surface of concentrator X(Y) is determined by a system of equations, which corresponds to the condition of illumination of different parts of the surface of the photoelectric receptor in the form of a cylinder with H length and radius r_o, and values of coordinates X, Y in the zone of the working profile of concentrator a-b are determined by the following equation: $${\left(X+r_o\right)}^2=4f_2^{}\ast \left(Y+\Delta Y\right),$$ in which $$\Delta У=\frac{X_b^2}{4f_1}-\frac{{\left(X_b-r_0\right)}^2}{4f_2},$$ where focal distance f₂ is calculated by the following formula: $$f_2=\left(H_1-Y_b-\frac{h_0}{2}\right)\left(1\pm \frac{1}{\sin \zeta }\right),$$ with that, angle ζ in the zone of the working profile of concentrator a-b between the cylinder surface and a beam reflected from the surface at coordinate point X_b, Y_b or coming down onto the surface of the compound parabolic concentrator, which reaches the focal area of the cylindrical photoelectric receptor of Stirling engine at level H₁-h₀/2, which is located on radius r_o, is calculated by the following formula: $$tg\zeta =\frac{H_1-Y_b-h_0/2}{X_b-r_0},$$ where focal distance f₁ is calculated by the following formula: $$f_1=\frac{mRtg\beta +H_1-r_{0}tg\beta }{1+2tg\beta }$$ values of coefficient m changing within 0 to 1, height H₁ between coordinate axis OX and end surface of the cylindrical photoelectric receptor of Stirling engine, radius of midsection of concentrator R, angle β between a beam reflected from surface at coordinate point X_C, Y_C of the compound parabolic concentrator coming at level h₀ to the focal area located on radius r₀ of the cylindrical photoelectric receptor of Stirling engine, and normal to the incident beam are chosen in compliance with boundary conditions; with that, values of coordinates X, Y in the zone of the working profile of concentrator b-c within values of angle α+β are determined in compliance with the following equation: $$X\text{}=2f_1[\frac{1}{\cos (\alpha +\beta )}-tg(\alpha +\beta )],$$ where α - angle in the zone of the working profile of concentrator b-c between the perpendicular to the incident beam and the beam reflected from the surface at coordinate point X, Y of the compound parabolic concentrator, which changes within 0 to h_o and comes at level h to the focal area located on radius r_o of the cylindrical photoelectric receptor of Stirling engine and is determined by the following formula: $$tg\alpha =\frac{H_1-Y-\left(h_0-h\right)}{X},$$ γ - angle in the zone of the working profile of concentrator c-d between the beam reflected from the surface at coordinate point X_d, Y_d of the compound parabolic concentrator and coming to the centre of the end part of the focal area of the cylindrical photoelectric receptor and height level H of the cylindrical photoelectric receptor of Stirling engine is determined by the following ratio: $$tg\left(\gamma -\beta \right)=\frac{Y-f_1}{X}=\frac{r_1+r_0}{H_1+f_1},$$ with that, values of coordinates X, Y in the zone of the working profile of concentrator c-d are determined in compliance with the following formula: X²=4f₁*Y, geometrical concentration of illumination of the photoelectric receptor K is determined by the following expression: K=(X-r₁)²/r_o(r_o+2h_o), where r_o - cylinder radius, r₁ - distance between symmetry axis 0, Y of the cylinder and focal distance f₁, h_o - size of the focal area on side surface of the cylindrical photoelectric receptor.

EFFECT: illumination of concentrated radiation is formed as a result of use of the invention on an effective surface of the photoelectric receptor.

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