WO2009150680A1

WO2009150680A1 - Equatorial mounting punctual parabolic concentrator for the transformation of solar energy in electric or mechanical energy

Info

Publication number: WO2009150680A1
Application number: PCT/IT2008/000414
Authority: WO
Inventors: Giuseppe Farina
Original assignee: Giuseppe Farina
Priority date: 2008-06-10
Filing date: 2008-06-20
Publication date: 2009-12-17
Also published as: WO2009150680A9; CN102119303B; CN102119303A; ITRM20080299A1; EP2304335A1

Abstract

Equatorial mounting parabolic concentrator for the transformation of solar energy in electric or mechanical energy wherein the concentrator's (1) vertex (v) is connected to a pedestal's (26) end on the declination axis (6) according to the hub (20) which results perpendicular to the concentrator's optical axis and to the North-South axis, and wherein the concentrator's support is integral with the concentric circular sector at the vertex of the concentrator (1). A circular sector (7) is being made slide between couples of idler rollers fixed on a carrying arm (13) which is supported by a pedestal (23) according to its axis (29). The mounting structure and the two pedestals (23-26) are fixed in a North-South plane to the latitude of the place where the structure is utilized.

Description

EQUATORIAL MOUNTING PUNCTUAL PARABOLIC CONCENTRATOR FOR THE TRANSFORMATION OF SOLAR ENERGY IN ELECTRIC OR MECHANICAL ENERGY

DESCRIPTION TEXT

The invention is described with reference to the enclosed diagrams (Tables 1-2 and 3) which illustrate a particular realization of the equatorial mounting structure for the captation of solar energy whose components are: 1) Captation structure of solar energy; 2) Declination transport and East- West transport group; 3) Mounting structure and pedestals of the unit; 4) Logic control system. 1- The solar energy captation structure is constituted by a parabolic concentrator (1) Tables 1-2 (figures 1-6) supporting on tile focus the receiver (2) (Stirling motor or else) by arms (3) connected to the support (4 ) with the vertex (v) ending with a fixed hub on which is centred the concentrator ( 1 ) to the staple ( 5 ) Tables 1- 2 ( figures 3-6 ) which are mounted on the carrying structure ( 4 ) Table 1 ( figure 2 ) constituted by as many interstitial frames with the same shape parabolicaUy curved (hi).

2 -Transport declination group. The supporting structure (4) Table 1 (figure 1) is connected to the supporting staple (5) Tables 1-2 (figures 1-5) integral with the declination axis (6), so mat the optical axis of the concentrator (1) is perpen= dicular to the North-South axis. With the concentrator (1) supporting structure (4) is integral the circular sector (7) according to the supporting arms (8) Table 1 (figure 1). The circular sector (7) has the centre in the vertex (v) of the concen= trator (1). The said circular sector is being made slide between one or a couple of idler rollers (9)Table 3 (figures 7-8) On the central part of the circular sector (7), along all its length, it keeps fixed a rack (10) (or helicoidal) which is paired up to the cogwheel (11) (or worm) integral with the transmission axis of the motor reducer (12) Table 3 (figure T). Under these conditions the circular sector (7) can rotate on a plane of the line North-South or vice versa South-North to adjust daily the concentrator's (1) position to the value of the declination of theSun. It's advisable, to balance the mass in motion, the counterbalance (24) Table 1 (figurel) fixed at the end of the arm (30).

The East-West transport group allows the motion around the North-South axis to the paraboloid (1) Tables 1-2-3 (figures 1-4-5-8) in parallel with the earth's axis. It's constituted by the circular staple arm ( 13 ) supporting the roller ( 9-21-27 ) and by the motion reducer (14) Table 3 ( figures 7-8 ). As an alternative to the function exerted by the staple arm ( 13 ), the circular sector ( 13a ) is coupled to the axis of the motor reducer ( 12a ), perpendicular to the North-South axis and rotating around the same axis Table 1 ( figures 1- Ia ); its ends (S) are fixed to the structure (4) by means of hinges that allow the declination motion. The circular staple arm (13) ( or circular sector 13a ) together with the concentrator ( 1 ), a rotating motion from East to West at an established speed of 15° per hour. The staple (15) is sustained by the support ( 23-31 ) by means of pivots ( 16 ) and when it is set to the location latitude ( φ) it is halted by the pivots ( 17 ) sliding in a slit of the staple ( 15 ). Also the mass in motion from East to West and vice versa is balanced by the counterbalance ( 24 ) Table 1 ( figure 1 ). 3 - Mounting structures and pedestals of the unit The mounting structure and the pedestals ( 23-26 ) are fixed in a North-South plane and they transport pivots ( 22-29 ) oriented in a North- South direction, in an angle corresponding to the latitude ((p ) of the location where the structure is utilized.

4 - Logic control system. The logic control system is fed by a feeding section (28) Table 1 (figure 1) that supplies the necessary tension to the various units.

An automatic limit switch (19) Table 1 (figure 1) blocks and inverts the rotatory motion of tiie paraboloid (1) from West to East and vice versa.

STATE OF TECHNOLOGY

To the writers opinion, no equatorial mounting punctual parabolic concentrator for the transformation of solar energy in electric or mechanical energy with the same technological characteristics has been verified in the present state of technology.

Claims

EQUATORIAL MOUNTING PUNCTUAL PARABOUC CONCENTRATOR FOR THE TRANSFORMATION OF SOLAR ENERGYIN ELECTRIC OR MECHANICAL ENERGY :

1 - A solar concentrator (1) and a support bearing a receiver ( i.e. Stirling motor ) by arms ( 3 ) connected to the same. The parabolic concentrator structure is characterized by the fact that the reflecting surface is constituted by many sections of reflecting material of trapezoidal shape ( Cl ) Table 1 ( figures 1-2 ), which are assembled on a load carrying structure ( 4 ) ( figure 1), which consists of as many frames of the same shape parabolically curved ( hi ) Table 1 (figure 2), intended for receiving them and is characterized by the fact that the paraboloid' s vertex bears a hub ( 20 ) integrated with the staple ( 5 ), by pivots.

2 - Staple arms ( 5 ) on which is connected the paraboloid unit to the support ( 4 ) of which to the claim 1 ), integral with the declination axis ( 6 ) and perpendicular to the North-South axis Tables 1-2 ( figures 1-4-5 ).

3 - Rack (lθ) circular sector 7 (or helicoidal) Tables 1-3 (figures 1-7-8), concentric to the vertex of the parabolic concentrator (1), whose ends are integralwith the concentrator's carrier structure (4), characterized by a rack (or helicoidal toothing) (10), coupled to the wheel (11) integral with the axis of the motor reducer (12) Table 3 (figures 7-8). The circular sector (T), by the motor reducer (12), during the rotational motion puts into effect, on a plane of the line North-South, preordained corrective angular elevation displacements of the concentrator (1), to adjust it daily to the values of the declination as regards the Sun ( + - 23°27'). 4 - Staple arms ( 18 ) enclosing the axis North-South Table 2 ( figures 4-5 ), by ball bearings. The staple arms ( 18 ) are integral with the ends of the pedestal ( 26 ).

5 - Adjustable inclination staple ( 15 )Tables 1-3 (figures 1-7-8), to the values of the latitude of the structure's utilization location, by means of a graduate scale. The staples ( 15) and (31) are supported by a pedestal (23) with frames Tables 1-3 (figures 1-7-8-). - Staple arm ( 13 ) for the transport East-West Tables 1-3 (figures l-7-8)in which the circular sector ( 7 ), according to claim 3), slides inside the couples of idler rollers (9-27-21) Table 3. The staple arm (13), is connected to the adjustable inclination staple (15) by means of the motor reducer's (14) axis. The staple arm ( 13 ) by means of the motor reducer (14), is rotating, together with the circular sector (7), around the North- South axis in parallel with the earth's axis, at the fixed speed of 15°per hour for following and synchronize the paraboloid's movement to the apparent motion of the Sun, from East to West. -Two pedestals (23-26) load carrying structure to support the concentrator (1 ) and to move it around perpendicular axes for following the motion of the Sun. The mounting structure included the two pedestals (23-26) which are fixed on a Norm- South plane at a certain distance and carry pivots (22-29) fixed in common axes oriented in a direction North-South with an angle corresponding to the latitude (^) of the installation location, so as the North-South rotation axis can assume a position parallel to the earth's axis. - Counterbalance (24) Table 1 ( figure 1 ), integral with the end of the arm ( 30 ), opposite to the circular sector ( 7 ) so as to balance the masses in the East- West movement and in the declination one. - Logic control system of the electromechanical plant fed by a feeding section (28) and an automatic limit switch (19) Table 1 (figure 1). - The circular sector ( 13a ), ( as an alternative to the function practised by the staple arm ( 13 ) according to claim ( 6 ), is coupled to the motor reducer's axis ( 12a ), perpendicular to the North-South axis and rotating around the same axis Table 1 (figures Ia- 19 ); its ends ( Q) are fixed to the structure (4) by means of hinges that allow the declination motion.