System and method for reconfiguring a solar panel for storage and transport
A mobile solar array is provided which can be reconfigured between an operational (i.e. flat) configuration, and a retracted (i.e. folded) configuration. This is a two-step process. First, the structure that supports the solar array in its operation configuration on a docking pad is collapsed. This lowers the solar array toward the docking pad. Next, the solar array, which includes three sections of photovoltaic modules is folded lengthwise. Specifically, side sections of the solar array are folded out-of-plane from the center section. This places the solar array in its retracted configuration.
1. A system for stowing a mobile solar array which comprises:
a support column mounted on a docking pad to support the solar array, wherein the support column has an upper column and a lower column with a hinge connection therebetween;
a hydraulic ram engaged to interconnect the lower column with the docking pad; and
a means for activating the hydraulic ram to rotate the upper column relative to the lower column back and forth on the hinge connection in a rotation plane, to move the solar array between an operational configuration and a retracted configuration, wherein for the operational configuration the support column is extended and the solar array is flat for collecting solar radiation, and wherein for the retracted configuration the support column is collapsed to lower the solar array toward the docking pad and the solar array is folded to provide a compact unit for transport of the mobile solar array and to present the solar array as a less aerodynamic body to minimize adverse wind effects.
2. The system recited in claim 1 wherein the solar panel comprises:
a rectangular shaped center section having a plurality of contiguous solar modules, wherein the center section has a length L and a width W; and
a pair of rectangular-shaped side sections wherein each side section includes a plurality of contiguous solar modules and has a length L and a width W, wherein the side sections straddle the center section and each side section is connected by hinges with the center section, and further wherein the lengths L of the respective center section and side sections are mutually parallel.
3. The system recited in claim 2 wherein L≅22 ft. and W is ≅4 ft.
4. The system recited in claim 2 wherein each side section is rotated back and forth on its respective hinges with the center section through a respective angle ±β relative to the center section when the solar array is folded, and wherein β is greater than 90°.
5. The system recited in claim 1 wherein an angle α is defined between the lower column and the upper column in a rotation plane established by the hinge connection during a movement of the solar array between its operational configuration and its retracted configuration, and wherein the angle α is in a range between 180° and 220° when the solar array is in its operational configuration and the angle α is in a range between 90° and 110° when the solar array is in its retracted configuration.
6. The system recited in claim 1 wherein the hydraulic ram is disconnected from the support column and from the docking pad when the solar array is in its operational configuration.
7. The system recited in claim 1 further comprising a support brace, wherein the support brace is engaged to interconnect the solar array with the docking pad to stabilize the solar array in its retracted configuration.
8. The system recited in claim 1 further comprising a hydraulic power pack for energizing the hydraulic ram.
9. A method for stowing a mobile solar array, wherein the solar array includes a support column mounted on a docking pad to support the solar array, the method comprising the steps of:
engaging a hydraulic ram to interconnect the support column with the docking pad, wherein the support column has an upper column and a lower column with a hinge connection between the upper and lower columns, and wherein the hydraulic ram is connected with the lower column;
activating the hydraulic ram to rotate the upper column relative to the lower column back and forth on a hinge connection, to move the solar array between an operational configuration and a retracted configuration, wherein for the operational configuration the support column is extended and the solar Array is flat for collectin solar radiation and wherein for the retracted configuration the support column is collapsed to lower the solar array toward the docking pad; and
folding the solar array to provide a compact unit for transport of the mobile solar array and to present the solar array as a less aerodynamic body to minimize adverse wind effects.
10. The method recited in claim 9 wherein the solar array includes a center section and a pair of side sections, wherein the side sections straddle the center section, and wherein the folding step is accomplished by the steps of;
rotating one side section back and forth on its respective hinges with the center section through an angle +β relative to the center section; and
rotating the other side section back and forth on its respective hinges with the center section through an angle −β, and wherein each angle β is greater than 90°.
11. The method recited in claim 9 further comprising the step of disconnecting the hydraulic ram from the support column and from the docking pad when the solar array is in its operational configuration.
12. The method recited in claim 9 further comprising the step of engaging a support brace to interconnect the solar array with the docking pad to stabilize the solar array in its retracted configuration.